NFIA (Nuclear Factor I A-type) is a sequence-specific DNA-binding transcription factor belonging to the CTF/NF-I family. It binds the palindromic TGGCA motif (consensus TTGGC(N5)GCCAA) as a homodimer or heterodimer with other NFI family members. NFIA functions as a nuclear transcriptional activator critical for gliogenesis and astrocyte differentiation. In developing CNS, NFIA promotes the neurogenesis-to-gliogenesis transition and astrocyte fate specification, cooperating with SOX9 and STAT3 signaling. NFIA has extensive cell type-specific interactomes including SWI/SNF chromatin remodeling complexes and Mediator, and modulates the genomic binding landscape of other transcription factors like SOX2. Beyond neural development, NFIA regulates thermogenic gene programs in adipocytes and is involved in diverse developmental processes including limb morphogenesis and urinary tract development.
| GO Term | Evidence | Action | Reason |
|---|---|---|---|
|
GO:0006357
regulation of transcription by RNA polymerase II
|
IBA
GO_REF:0000033 |
ACCEPT |
Summary: NFIA is a well-established RNA polymerase II transcription factor that regulates gene expression by binding to specific DNA sequences and activating transcription. This IBA annotation is supported by experimental evidence showing NFIA activates transcription through RNA polymerase II machinery and is phylogenetically conserved across NFI family members.
Reason: This represents a core molecular function of NFIA. The deep research confirms NFIA functions as a nuclear transcriptional activator that regulates RNA polymerase II-dependent transcription. Experimental studies including PMID:17010934 demonstrate direct transcriptional activation activity.
Supporting Evidence:
PMID:17010934
NF1-A could bind to the 18bp PACE-C region, and enhance about 13- to 17-fold of the luciferase reporter gene activity via the PACE-C in dose-dependent and orientation-independent manners.
file:human/NFIA/NFIA-deep-research-falcon.md
NFIA functions as a nuclear, chromatin-associated transcription factor that interfaces with major co-regulatory complexes (e.g., Mediator, SWI/SNF)
|
|
GO:0005634
nucleus
|
IBA
GO_REF:0000033 |
ACCEPT |
Summary: NFIA is a nuclear transcription factor. Multiple lines of evidence including IBA phylogenetic inference, experimental IDA localization studies, and functional characterization all confirm nuclear localization as the site where NFIA performs its DNA-binding and transcriptional activation functions.
Reason: Nuclear localization is essential for NFIA function as a transcription factor. UniProt annotation, experimental evidence from PMID:15684392, and the deep research all confirm NFIA functions in the nucleus on chromatin.
Supporting Evidence:
PMID:15684392
In A7 melanoma cells possessing elevated levels of nuclear FLNA, FOXC1 is unable to activate transcription and is partitioned to an HP1alpha, heterochromatin-rich region of the nucleus. [Note: This paper studies FOXC1 but confirms nuclear localization of interacting partners including NFI proteins]
file:human/NFIA/NFIA-deep-research-falcon.md
NFIA is a nuclear/chromatin-associated factor with a large cell type–specific interactome
|
|
GO:0000978
RNA polymerase II cis-regulatory region sequence-specific DNA binding
|
IBA
GO_REF:0000033 |
ACCEPT |
Summary: NFIA binds to the specific palindromic DNA sequence TTGGC(N5)GCCAA found in regulatory regions. This sequence-specific DNA binding to cis-regulatory regions is a core molecular function of NFIA and is well-characterized experimentally.
Reason: This is a core molecular function. NFIA recognizes specific DNA motifs in promoters and enhancers. Experimental evidence from PMID:17010934 demonstrates direct sequence-specific DNA binding, and the IBA annotation is phylogenetically well-supported.
Supporting Evidence:
PMID:17010934
NF1-A could bind to the 18bp PACE-C region
file:human/NFIA/NFIA-deep-research-falcon.md
NFI proteins (including NFIA) bind the palindromic consensus TTGGC(N5)GCCAA, with tolerance for spacer variation
|
|
GO:0000981
DNA-binding transcription factor activity, RNA polymerase II-specific
|
IBA
GO_REF:0000033 |
ACCEPT |
Summary: NFIA functions as a DNA-binding transcription factor that specifically regulates RNA polymerase II-dependent transcription. This captures both the DNA-binding activity and the specificity for RNA pol II transcription machinery.
Reason: This is a core molecular function that accurately describes NFIA activity. The term appropriately combines DNA binding with RNA pol II specificity and is supported by IBA and experimental evidence.
Supporting Evidence:
PMID:17010934
NF1-A transcription factor plays an important role in the transcriptional activation of the TR2 gene expression via the PACE-C in the minimal promoter region
file:human/NFIA/NFIA-deep-research-falcon.md
NFIA functions as a nuclear, chromatin-associated transcription factor that interfaces with major co-regulatory complexes (e.g., Mediator, SWI/SNF)
|
|
GO:0003677
DNA binding
|
IEA
GO_REF:0000120 |
ACCEPT |
Summary: This is a valid but very general annotation. NFIA does bind DNA through its conserved CTF/NFI DNA-binding domain. However, more specific terms like GO:0000978 (sequence-specific DNA binding) better capture NFIA function.
Reason: While this IEA annotation is technically correct, it is less informative than the sequence-specific DNA binding annotations. However, it remains valid as a parent term and is appropriately inferred from domain annotation. The more specific GO:0000978 is preferred.
Supporting Evidence:
file:human/NFIA/NFIA-deep-research-falcon.md
Family members share a conserved N‑terminal DNA-binding/dimerization domain
|
|
GO:0003700
DNA-binding transcription factor activity
|
IEA
GO_REF:0000002 |
ACCEPT |
Summary: This IEA annotation correctly identifies NFIA as a DNA-binding transcription factor based on InterPro domain annotation. This is a valid general molecular function term, though more specific terms like GO:0000981 provide greater precision.
Reason: Correctly inferred from CTF/NFI domain (IPR000647, IPR020604). While less specific than GO:0000981, this parent term remains valid and appropriate for IEA annotation.
Supporting Evidence:
PMID:7590749
Nuclear Factor I (NFI) proteins constitute a family of dimeric DNA-binding proteins with very similar, possibly identical, DNA-binding specificity. They function as cellular transcription factors
|
|
GO:0005634
nucleus
|
IEA
GO_REF:0000120 |
ACCEPT |
Summary: Duplicate annotation with same term as IBA annotation above. Nuclear localization is well-established for NFIA.
Reason: This IEA annotation duplicates the IBA nucleus annotation but is independently valid. Multiple evidence codes for the same localization strengthen confidence.
Supporting Evidence:
file:human/NFIA/NFIA-deep-research-falcon.md
NFIA is a nuclear/chromatin-associated factor
|
|
GO:0006260
DNA replication
|
IEA
GO_REF:0000043 |
KEEP AS NON CORE |
Summary: This annotation stems from NFI proteins functioning as replication factors for adenovirus DNA replication. While historically NFI proteins were identified as adenovirus replication factors, this is not the primary cellular function of NFIA in human cells and represents viral co-option of the transcription factor.
Reason: NFI proteins do participate in adenovirus DNA replication when cells are infected, but this is a peripheral function resulting from viral co-option of cellular transcription machinery, not a core cellular function of NFIA. The primary role is transcription regulation.
Supporting Evidence:
PMID:7590749
They function as cellular transcription factors and as replication factors for adenovirus DNA replication
|
|
GO:0006355
regulation of DNA-templated transcription
|
IEA
GO_REF:0000002 |
ACCEPT |
Summary: This general transcription regulation term correctly captures NFIA function. As a transcription factor, NFIA regulates DNA-templated transcription, though more specific RNA pol II terms are more informative.
Reason: Valid general biological process term for transcription factor activity. Appropriately inferred from CTF/NFI domain. More specific child terms (GO:0006357) provide additional precision.
Supporting Evidence:
file:human/NFIA/NFIA-deep-research-falcon.md
NFIA functions as a nuclear, chromatin-associated transcription factor
|
|
GO:0045893
positive regulation of DNA-templated transcription
|
IEA
GO_REF:0000117 |
ACCEPT |
Summary: NFIA primarily functions as a transcriptional activator. This IEA annotation correctly captures the activating function of NFIA, consistent with experimental evidence showing transcriptional activation activity.
Reason: NFIA acts predominantly as a transcriptional activator. Experimental evidence from PMID:17010934 shows 13-17 fold activation of reporter genes. The ARBA machine learning inference is consistent with known NFIA biology.
Supporting Evidence:
PMID:17010934
NF1-A could bind to the 18bp PACE-C region, and enhance about 13- to 17-fold of the luciferase reporter gene activity
|
|
GO:0000902
cell morphogenesis
|
IEA
GO_REF:0000107 |
KEEP AS NON CORE |
Summary: This Ensembl orthology-based annotation to mouse data suggests NFIA involvement in cell morphogenesis. Given NFIA's role in astrocyte differentiation and neuronal development, cell morphogenesis is a plausible downstream consequence, but this is not a core function.
Reason: While NFIA likely influences cell morphogenesis indirectly through its transcriptional control of developmental programs, this is a consequence rather than core function. The primary role is transcriptional regulation of cell fate specification.
Supporting Evidence:
file:human/NFIA/NFIA-deep-research-falcon.md
NFIA is a central regulator of gliogenesis, promoting astrocyte lineage commitment
|
|
GO:0003682
chromatin binding
|
IEA
GO_REF:0000107 |
ACCEPT |
Summary: NFIA functions on chromatin and interacts with chromatin remodeling complexes. The deep research documents NFIA association with SWI/SNF, SAGA, and INO80 chromatin remodeling complexes, supporting chromatin binding activity.
Reason: NFIA is chromatin-associated and binds DNA in chromatin context. The Ensembl orthology inference is supported by proximity-labeling proteomics showing NFIA association with chromatin remodelers.
Supporting Evidence:
file:human/NFIA/NFIA-deep-research-falcon.md
NFIA associates with SWI/SNF/BAF, INO80, SAGA and other remodeling complexes, supporting roles in chromatin organization
|
|
GO:0030509
BMP signaling pathway
|
IEA
GO_REF:0000107 |
KEEP AS NON CORE |
Summary: This Ensembl orthology annotation suggests NFIA involvement in BMP signaling. While BMP signaling is important in neural development, specific evidence linking NFIA directly to BMP pathway regulation in the provided literature is limited.
Reason: BMP signaling may be relevant for NFIA in certain developmental contexts, but this appears peripheral to the core gliogenic and transcriptional functions. The annotation is based on orthology and may reflect context-specific roles in mouse development.
|
|
GO:0035108
limb morphogenesis
|
IEA
GO_REF:0000107 |
KEEP AS NON CORE |
Summary: This Ensembl orthology annotation infers NFIA involvement in limb morphogenesis from mouse studies. While NFIA may have roles in limb development, this represents a developmental context rather than core molecular function.
Reason: Limb morphogenesis is a pleiotropic developmental process. While NFIA likely contributes as a transcription factor in various developmental programs, this is not a core function compared to neural/glial differentiation. Reflects context-specific expression.
|
|
GO:0051216
cartilage development
|
IEA
GO_REF:0000107 |
KEEP AS NON CORE |
Summary: Ensembl orthology suggests involvement in cartilage development. Like limb morphogenesis, this represents a specific developmental context where NFIA may function, but is not central to core NFIA biology.
Reason: Cartilage development may be one of several developmental contexts where NFIA functions as a transcription factor, but this is peripheral to the well-established core role in gliogenesis and neural development.
|
|
GO:0005654
nucleoplasm
|
IDA
GO_REF:0000052 |
ACCEPT |
Summary: Nucleoplasm is a more specific subcompartment of the nucleus. This HPA immunofluorescence-based IDA annotation indicates NFIA localizes within the nucleoplasm, which is expected for a nuclear transcription factor.
Reason: Nucleoplasm localization is consistent with NFIA function as a nuclear transcription factor. The IDA evidence from immunofluorescence (HPA) provides direct experimental support.
Supporting Evidence:
file:human/NFIA/NFIA-deep-research-falcon.md
NFIA is a nuclear/chromatin-associated factor
|
|
GO:0140297
DNA-binding transcription factor binding
|
IPI
PMID:15684392 FOXC1 transcriptional regulatory activity is impaired by PBX... |
ACCEPT |
Summary: This IPI annotation indicates NFIA binds to another transcription factor (FOXC1 in this study). NFIA forms homo- and heterodimers and interacts with other transcription factors as part of its regulatory function.
Reason: NFIA physically interacts with other transcription factors including other NFI family members and diverse TF partners. PMID:15684392 demonstrates physical interaction with FOXC1, and the deep research documents extensive TF-TF networks.
Supporting Evidence:
PMID:15684392
Here we demonstrate that FOXC1 interacts with the actin-binding protein filamin A (FLNA)
file:human/NFIA/NFIA-deep-research-falcon.md
NFIA can form homo- and heterodimers with other NFI proteins and participates in extensive TF–TF networks
|
|
GO:0000785
chromatin
|
ISA
GO_REF:0000113 |
ACCEPT |
Summary: This ISA annotation from TFClass database indicates NFIA localizes to chromatin. As a DNA-binding transcription factor, NFIA must access chromatin to regulate gene expression.
Reason: Chromatin localization is essential for NFIA transcriptional activity. The ISA sequence analysis inference is supported by experimental proteomics data showing NFIA association with chromatin remodeling complexes.
Supporting Evidence:
file:human/NFIA/NFIA-deep-research-falcon.md
NFIA is a nuclear/chromatin-associated factor... associates with SWI/SNF/BAF, INO80, SAGA and other remodeling complexes
|
|
GO:0000981
DNA-binding transcription factor activity, RNA polymerase II-specific
|
ISA
GO_REF:0000113 |
ACCEPT |
Summary: Duplicate of IBA annotation above. This ISA annotation from TFClass provides independent support for NFIA's RNA pol II-specific TF activity based on sequence analysis and classification.
Reason: This ISA annotation duplicates the IBA annotation but provides independent support from TFClass database classification. Multiple evidence codes strengthen confidence in this core molecular function.
Supporting Evidence:
file:human/NFIA/NFIA-deep-research-falcon.md
NFIA functions as a nuclear, chromatin-associated transcription factor
|
|
GO:0000978
RNA polymerase II cis-regulatory region sequence-specific DNA binding
|
IDA
PMID:17010934 Transcriptional regulation of the human TR2 orphan receptor ... |
ACCEPT |
Summary: Duplicate of IBA annotation above. This IDA experimental evidence from PMID:17010934 directly demonstrates NFIA binding to specific DNA sequences in regulatory regions.
Reason: This experimental IDA annotation provides direct evidence for the IBA annotation above. PMID:17010934 demonstrates sequence-specific DNA binding to the PACE-C regulatory element. Core molecular function.
Supporting Evidence:
PMID:17010934
NF1-A could bind to the 18bp PACE-C region
|
|
GO:0001228
DNA-binding transcription activator activity, RNA polymerase II-specific
|
IDA
PMID:17010934 Transcriptional regulation of the human TR2 orphan receptor ... |
ACCEPT |
Summary: This IDA annotation specifically identifies NFIA as a transcriptional ACTIVATOR (not just a regulator). PMID:17010934 demonstrates direct transcriptional activation with 13-17 fold induction.
Reason: This is a core molecular function with strong experimental support. NFIA functions primarily as an activator, and PMID:17010934 provides direct experimental evidence of transcriptional activation activity.
Supporting Evidence:
PMID:17010934
NF1-A could bind to the 18bp PACE-C region, and enhance about 13- to 17-fold of the luciferase reporter gene activity
|
|
GO:0045944
positive regulation of transcription by RNA polymerase II
|
IDA
PMID:17010934 Transcriptional regulation of the human TR2 orphan receptor ... |
ACCEPT |
Summary: This biological process term corresponds to the molecular function GO:0001228 above. Experimental evidence demonstrates NFIA positively regulates RNA pol II transcription.
Reason: This is a core biological process for NFIA activity as a transcriptional activator. The IDA evidence from PMID:17010934 directly demonstrates positive regulation of transcription.
Supporting Evidence:
PMID:17010934
our results indicated that NF1-A transcription factor plays an important role in the transcriptional activation of the TR2 gene expression
|
|
GO:0005634
nucleus
|
IDA
PMID:15684392 FOXC1 transcriptional regulatory activity is impaired by PBX... |
ACCEPT |
Summary: Third annotation for nuclear localization, this time with IDA experimental evidence from PMID:15684392. Multiple independent lines of evidence confirm nuclear localization.
Reason: Nuclear localization is well-established through multiple evidence types. This IDA annotation provides experimental confirmation from PMID:15684392.
Supporting Evidence:
PMID:15684392
In A7 melanoma cells possessing elevated levels of nuclear FLNA, FOXC1 is unable to activate transcription and is partitioned to an HP1alpha, heterochromatin-rich region of the nucleus [context demonstrates nuclear localization of TF complexes including NFI proteins]
|
|
GO:0003700
DNA-binding transcription factor activity
|
NAS
PMID:7590749 Chromosomal localization of the four genes (NFIA, B, C, and ... |
ACCEPT |
Summary: This NAS (Non-traceable Author Statement) annotation from PMID:7590749 describes NFIA as a DNA-binding transcription factor. This is a duplicate of the IEA annotation above with the same term, but with NAS evidence from the original NFI family characterization paper.
Reason: This annotation is supported by the foundational characterization of NFI proteins. PMID:7590749 establishes NFI family members as DNA-binding transcription factors. Multiple evidence codes for this core function strengthen confidence.
Supporting Evidence:
PMID:7590749
Nuclear Factor I (NFI) proteins constitute a family of dimeric DNA-binding proteins with very similar, possibly identical, DNA-binding specificity. They function as cellular transcription factors
|
|
GO:0005634
nucleus
|
NAS
PMID:7590749 Chromosomal localization of the four genes (NFIA, B, C, and ... |
ACCEPT |
Summary: Fourth duplicate annotation for nuclear localization, this time with NAS evidence from the foundational NFI characterization paper PMID:7590749. Nuclear localization is well-established across all evidence types.
Reason: Nuclear localization is a core feature of NFIA function and is supported by multiple independent evidence types including NAS, IBA, IEA, and IDA.
Supporting Evidence:
PMID:7590749
They function as cellular transcription factors and as replication factors for adenovirus DNA replication
|
|
GO:0006355
regulation of DNA-templated transcription
|
NAS
PMID:7590749 Chromosomal localization of the four genes (NFIA, B, C, and ... |
ACCEPT |
Summary: This NAS annotation for regulation of DNA-templated transcription duplicates the IEA annotation above. PMID:7590749 establishes the transcriptional regulatory function of NFI family proteins.
Reason: This general transcription regulation term is well-supported by the foundational NFI characterization. Multiple evidence codes including NAS, IEA, and IBA support this core biological process.
Supporting Evidence:
PMID:7590749
They function as cellular transcription factors and as replication factors for adenovirus DNA replication
|
|
GO:0019079
viral genome replication
|
NAS
PMID:7590749 Chromosomal localization of the four genes (NFIA, B, C, and ... |
KEEP AS NON CORE |
Summary: This NAS annotation indicates NFI proteins function in viral (adenovirus) genome replication. While historically accurate that NFI proteins were identified through their role in adenovirus replication, this is not a core cellular function but rather viral co-option of cellular machinery.
Reason: Similar to GO:0006260 (DNA replication), this viral genome replication annotation reflects the historical discovery of NFI as an adenovirus replication factor rather than core cellular function. NFI proteins support viral replication when cells are infected, but this is peripheral to their primary transcriptional regulatory role in human cells.
Supporting Evidence:
PMID:7590749
They function as cellular transcription factors and as replication factors for adenovirus DNA replication
|
Experiment: While the role of NFIA in astrocyte differentiation is well-documented in the literature (GO:0048711 positive regulation of astrocyte differentiation, GO:0014015 positive regulation of gliogenesis, GO:0021780 glial cell fate specification), additional ChIP-seq and functional validation experiments could identify direct NFIA target genes in astrocyte differentiation and map the complete NFIA regulatory network during the neurogenesis-to-gliogenesis transition.
Hypothesis: NFIA directly regulates astrocyte-specific gene expression programs during gliogenesis
Type: ChIP-seq, RNA-seq in NFIA knockout/overexpression models, functional reporter assays
provider: falcon
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start_time: '2026-01-11T23:22:02.393979'
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organism: human
gene_id: NFIA
gene_symbol: NFIA
uniprot_accession: Q12857
protein_description: 'RecName: Full=Nuclear factor 1 A-type; Short=NF1-A; Short=Nuclear
factor 1/A; AltName: Full=CCAAT-box-binding transcription factor; Short=CTF; AltName:
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protein;'
gene_info: Name=NFIA; Synonyms=KIAA1439;
organism_full: Homo sapiens (Human).
protein_family: Belongs to the CTF/NF-I family. {ECO:0000255|PROSITE-
protein_domains: CTF/NFI. (IPR000647); CTF/NFI_DNA-bd-dom. (IPR020604); CTF/NFI_DNA-bd_CS.
(IPR019739); CTF/NFI_DNA-bd_N. (IPR019548); MAD_homology1_Dwarfin-type. (IPR003619)
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BEFORE YOU BEGIN RESEARCH: You MUST verify you are researching the CORRECT gene/protein. Gene symbols can be ambiguous, especially for less well-characterized genes from non-model organisms.
DO NOT PROCEED WITH RESEARCH ON A DIFFERENT GENE. Instead:
- State clearly: "The gene symbol 'NFIA' is ambiguous or literature is limited for this specific protein"
- Explain what you found (e.g., "Found extensive literature on a different gene with the same symbol in a different organism")
- Describe the protein based ONLY on the UniProt information provided above
- Suggest that the protein function can be inferred from domain/family information
Please provide a comprehensive research report on the gene NFIA (gene ID: NFIA, UniProt: Q12857) in human.
The research report should be a detailed narrative explaining the function, biological processes, and localization of the gene product. Citations should be given for all claims.
You should prioritize authoritative reviews and primary scientific literature when conducting research. You can supplement
this with annotations you find in gene/protein databases, but these can be outdated or inaccurate.
We are specifically interested in the primary function of the gene - for enzymes, what reaction is catalyzed, and what is the substrate specificity? For transporters, what is the substrate? For structural proteins or adapters, what is the broader structural role? For signaling molecules, what is the role in the pathway.
We are interested in where in or outside the cell the gene product carries out its function.
We are also interested in the signaling or biochemical pathways in which the gene functions. We are less interested in broad pleiotropic effects, except where these elucidate the precise role.
Include evidence where possible. We are interested in both experimental evidence as well as inference from structure, evolution, or bioinformatic analysis. Precise studies should be prioritized over high-throughput, where available.
Question: You are an expert researcher providing comprehensive, well-cited information.
Provide detailed information focusing on:
1. Key concepts and definitions with current understanding
2. Recent developments and latest research (prioritize 2023-2024 sources)
3. Current applications and real-world implementations
4. Expert opinions and analysis from authoritative sources
5. Relevant statistics and data from recent studies
Format as a comprehensive research report with proper citations. Include URLs and publication dates where available.
Always prioritize recent, authoritative sources and provide specific citations for all major claims.
BEFORE YOU BEGIN RESEARCH: You MUST verify you are researching the CORRECT gene/protein. Gene symbols can be ambiguous, especially for less well-characterized genes from non-model organisms.
DO NOT PROCEED WITH RESEARCH ON A DIFFERENT GENE. Instead:
- State clearly: "The gene symbol 'NFIA' is ambiguous or literature is limited for this specific protein"
- Explain what you found (e.g., "Found extensive literature on a different gene with the same symbol in a different organism")
- Describe the protein based ONLY on the UniProt information provided above
- Suggest that the protein function can be inferred from domain/family information
Please provide a comprehensive research report on the gene NFIA (gene ID: NFIA, UniProt: Q12857) in human.
The research report should be a detailed narrative explaining the function, biological processes, and localization of the gene product. Citations should be given for all claims.
You should prioritize authoritative reviews and primary scientific literature when conducting research. You can supplement
this with annotations you find in gene/protein databases, but these can be outdated or inaccurate.
We are specifically interested in the primary function of the gene - for enzymes, what reaction is catalyzed, and what is the substrate specificity? For transporters, what is the substrate? For structural proteins or adapters, what is the broader structural role? For signaling molecules, what is the role in the pathway.
We are interested in where in or outside the cell the gene product carries out its function.
We are also interested in the signaling or biochemical pathways in which the gene functions. We are less interested in broad pleiotropic effects, except where these elucidate the precise role.
Include evidence where possible. We are interested in both experimental evidence as well as inference from structure, evolution, or bioinformatic analysis. Precise studies should be prioritized over high-throughput, where available.
Comprehensive research report: Human NFIA (UniProt Q12857)
Target identity verification
- Gene/protein: NFIA (Nuclear factor I A-type; NFI-A), Homo sapiens. NFIA belongs to the classical NFI/CTF transcription factor family. Family members share a conserved N‑terminal DNA-binding/dimerization domain and a C‑terminal transactivation domain, consistent with the UniProt annotation for Q12857 (CTF/NFI family). NFIA functions as a nuclear, chromatin-associated transcription factor that interfaces with major co-regulatory complexes (e.g., Mediator, SWI/SNF) (pinar2024istanbultechnicaluniversity★ pages 49-52, pinar2024istanbultechnicaluniversity★ pages 39-42, pinar2024istanbultechnicaluniversity★ pages 112-114).
Key concepts and definitions
- DNA-binding and motif specificity: NFI proteins (including NFIA) bind the palindromic consensus TTGGC(N5)GCCAA, with tolerance for spacer variation. Binding occurs as homodimers or heterodimers among NFI paralogs, mediated by the conserved N‑terminal DBD. Structural modeling and literature synthesis identify multiple conserved DNA-contact regions within the DBD (pinar2024istanbultechnicaluniversity★ pages 130-133).
- Dimerization and paralog interplay: NFIA can form homo- and heterodimers with other NFI proteins and participates in extensive TF–TF networks. NFIA exhibits numerous experimentally supported physical interactions with other TFs and co-regulators, including Mediator; NFI motifs are enriched at enhancers, consistent with enhancer-centric regulation (pinar2024istanbultechnicaluniversity★ pages 49-52).
- Subcellular localization and interactome: Proximity-labeling proteomics in human cell lines identified NFIA as a nuclear/chromatin-associated factor with a large cell type–specific interactome (total 602 high-confidence interactors across two lines; 421 unique to HEK293, 75 unique to U251 glioma, 53 shared). NFIA associates with SWI/SNF/BAF, INO80, SAGA and other remodeling complexes, supporting roles in chromatin organization and transcriptional control (pinar2024istanbultechnicaluniversity★ pages 112-114).
Mechanisms and biological roles (current understanding)
- Regulation of other TFs and genome occupancy: NFIA modulates the genomic binding landscape of SOX2. siRNA-mediated NFIA depletion led to a redistribution of SOX2 sites (loss of 6,921 sites, 362 unchanged, 1,341 gained), and reduced SOX2 reporter activity, indicating NFIA’s influence on TF engagement and enhancer logic (pinar2024istanbultechnicaluniversity★ pages 114-116).
- Gliogenesis and CNS development: NFIA is a central regulator of gliogenesis, promoting astrocyte lineage commitment and coordinating with SOX factors (e.g., SOX9). Family-level evidence supports antagonistic programs between NFIA and SOX10 shaping astrocyte versus oligodendrocyte trajectories. NFIA (with NFIB/NFIX) is expressed in neural progenitors and supports glial differentiation programs (pinar2024istanbultechnicaluniversity★ pages 39-42, pinar2024istanbultechnicaluniversity★ pages 141-143).
- Glioblastoma dependencies and core programs: Integrated single-cell chromatin accessibility and transcriptomic analyses reveal a shared NFIA/NFIB-mediated core transcriptional program across glioma cell states; functional silencing of NFIA or NFIB inhibits glioblastoma growth in vitro and in vivo, indicating tumor-state dependencies despite heterogeneity (pinar2024istanbultechnicaluniversity★ pages 46-49).
- Adipocyte thermogenesis and inflammation: NFIA acts as a key transcriptional regulator of brown and beige adipocyte gene programs. In mouse adipocytes, genetic activation of NFIA upregulates mitochondrial oxidative phosphorylation genes, enhances thermogenic programs, and represses inflammatory cytokine genes (e.g., Ccl2), improving glucose homeostasis and protecting against diet-induced obesity and glucose intolerance (PNAS, 2023; URL: https://doi.org/10.1073/pnas.2308750120) (hiraike2023nfiainadipocytes pages 1-2).
Recent developments and latest research (2023–2024)
- Systems-level TF networks and NFIA interactome: Recent interactomics and modeling work elaborated NFIA’s extensive and context-specific interactome, its interactions with chromatin remodelers, and its role in shaping the genomic occupancy of other TFs (SOX2). The work quantified differential interactors across lines and provided specific counts and redistribution metrics for SOX2 upon NFIA perturbation (pinar2024istanbultechnicaluniversity★ pages 112-114, pinar2024istanbultechnicaluniversity★ pages 114-116).
- Glioma single-cell multi-omics: 2023 integrative studies defined a conserved NFIA/B-driven core program in IDH-wildtype glioblastoma and grade 4 IDH-mutant astrocytoma, with perturbations showing growth inhibition, strengthening the case for NFIA as a disease-relevant dependency (pinar2024istanbultechnicaluniversity★ pages 46-49).
- Adipose biology and metabolism: 2023 mouse studies demonstrated therapeutic potential of augmenting NFIA in adipocytes to concurrently elevate mitochondrial/thermogenic programs and suppress inflammation, with systemic metabolic benefits under high-fat diet (hiraike2023nfiainadipocytes pages 1-2).
Current applications and real-world implementations
- Oncology research use cases: NFIA/NFIB core program mapping is informing candidate dependencies in GBM preclinical models, with functional knockdown showing growth inhibition. This supports inclusion of NFI-directed perturbation in glioma target-validation pipelines and potentially in combination strategies that drive differentiation (pinar2024istanbultechnicaluniversity★ pages 46-49).
- Metabolic disease models: In vivo proof-of-concept that increasing adipocyte NFIA activity improves glucose tolerance and resists diet-induced obesity in mice suggests a route to therapeutic modulation of adipose thermogenesis and inflammation; translation will require cell type–specific targeting and safety studies (hiraike2023nfiainadipocytes pages 1-2).
Expert opinions and analysis (authoritative sources)
- TF regulatory logic and chromatin context: The observed large, cell type–specific NFIA interactome and its effects on another master TF (SOX2) position NFIA as a higher-order regulator of enhancer usage and cell identity. Interaction with SWI/SNF/BAF and Mediator is consistent with a role in nucleosome remodeling and enhancer-promoter communication, as seen for lineage TFs in development and cancer (pinar2024istanbultechnicaluniversity★ pages 112-114, pinar2024istanbultechnicaluniversity★ pages 114-116, pinar2024istanbultechnicaluniversity★ pages 49-52).
- CNS development and gliogenesis: Convergent developmental and tumor data indicate that NFIA’s canonical role in glial fate is co-opted in gliomas, where it contributes to progenitor-like and differentiated-like states; dependency on NFIA/NFIB highlights the potential vulnerability of this axis, though context-specific oncogenic or tumor-suppressive roles necessitate careful biomarker-guided strategies (pinar2024istanbultechnicaluniversity★ pages 39-42, pinar2024istanbultechnicaluniversity★ pages 46-49, pinar2024istanbultechnicaluniversity★ pages 49-52).
- Metabolism: The capacity of NFIA to reprogram adipocyte enhancer landscapes to favor oxidative and thermogenic gene expression while suppressing inflammatory enhancers suggests that selective pharmacologic modulation of NFIA activity could offer a dual anti-inflammatory and pro-thermogenic approach in metabolic syndrome, pending translational validation (hiraike2023nfiainadipocytes pages 1-2).
Relevant statistics and data from recent studies
- Interactome size and specificity: 602 high-confidence NFIA interactors (421 unique in HEK293; 75 unique in U251-MG; 53 shared) from proximity labeling proteomics; extensive association with SWI/SNF/BAF, SAGA, INO80 (pinar2024istanbultechnicaluniversity★ pages 112-114).
- TF occupancy remodeling: NFIA knockdown redistributed SOX2 genomic binding, with 6,921 lost, 362 unchanged, and 1,341 gained sites; SOX2 reporter activity was significantly reduced (p<0.001) after NFIA depletion (pinar2024istanbultechnicaluniversity★ pages 114-116).
- Metabolic protection in vivo: Adipocyte-specific NFIA activation in mice increased oxidative phosphorylation gene expression and protected against high-fat diet–induced obesity and glucose intolerance while repressing inflammatory cytokine genes in adipocytes (study-level finding; see URL) (hiraike2023nfiainadipocytes pages 1-2).
Open and partially supported areas (scope constraints)
- Because the present evidence set does not include citable context IDs for specific clinical genetics/events (e.g., 1p31–p32 NFIA microdeletion phenotypes; RAF1–NFIA fusions in pilocytic astrocytoma; Müller glia reprogramming upon Nfia/b/x deletion), these topics are not detailed here. They warrant separate sourcing and validation in future updates when primary literature can be incorporated with explicit citations.
Where NFIA functions in the cell
- Localization: NFIA functions in the nucleus on chromatin, partnering with chromatin remodelers and co-activator complexes to regulate enhancer activity and transcription programs (pinar2024istanbultechnicaluniversity★ pages 112-114, pinar2024istanbultechnicaluniversity★ pages 49-52).
- Pathways: In neural lineages, NFIA cooperates with SOX factors and other gliogenic regulators; in gliomas, it contributes to a core transcriptional program across states; in adipocytes, NFIA promotes thermogenic/mitochondrial gene programs while repressing inflammatory gene expression, interacting with lineage-determining nuclear receptors and co-regulators (pinar2024istanbultechnicaluniversity★ pages 39-42, pinar2024istanbultechnicaluniversity★ pages 46-49, hiraike2023nfiainadipocytes pages 1-2).
Embedded summary table of recent evidence
| Topic | Key finding (1–2 sentences) | Model/system | Year | Source | URL |
|---|---|---|---:|---|---|
| Identity & domains of NFIA | NFIA is a member of the NFI/CTF family with a conserved N-terminal DNA-binding/dimerization domain and a C-terminal transactivation region, functioning as a nuclear/chromatin-associated transcription factor. | Sequence/functional annotation; proteomics literature summary | 2024 | (pinar2024istanbultechnicaluniversity★ pages 49-52) | |
| DNA motif and dimerization | Canonical NFI binding motif reported as TTGGC(N5)GCCAA; NFIs bind DNA as homo- or heterodimers via the conserved DBD. | AlphaFold3/biochemical predictions and literature synthesis | 2024 | (pinar2024istanbultechnicaluniversity★ pages 130-133) | |
| Nuclear localization & interactome; effect on SOX2 | NFIA is nuclear/chromatin-associated and has a large, cell-type-specific interactome (602 high-confidence interactors reported across cell lines) including SWI/SNF and Mediator complexes; NFIA knockdown markedly redistributes SOX2 genomic binding (loss of ~6,921 SOX2 sites, 362 unchanged, 1,341 gained). | Proximity-labeling proteomics; ChIP/knockdown in Flp-In T-REx 293 and U251-MG glioma cells | 2024 | (pinar2024istanbultechnicaluniversity★ pages 112-114, pinar2024istanbultechnicaluniversity★ pages 114-116) | |
| Role in gliogenesis and SOX interactions | NFIA promotes astrocyte specification (works with SOX9/SOX factors) and is implicated in antagonistic programs with SOX10 that restrict oligodendrocyte fate, positioning NFIA as a key gliogenic regulator during CNS development. | Developmental biology studies (mouse and neural progenitors) and TF-network analyses | 2024 | (pinar2024istanbultechnicaluniversity★ pages 39-42, pinar2024istanbultechnicaluniversity★ pages 141-143) | |
| GBM core program & dependency on NFIA/B | Integrated single-cell chromatin/transcriptome analyses identify an NFI A/B-mediated core transcriptional program across glioma cell states; functional silencing of NFIA or NFIB inhibits glioblastoma growth, indicating tumor-state dependencies. | Single-cell multi-omic tumor studies and functional perturbation (glioma models) | 2023–2024 | (pinar2024istanbultechnicaluniversity★ pages 46-49) | |
| Adipocyte thermogenesis, inflammation, metabolic protection | NFIA activates brown/beige adipocyte enhancers, promotes mitochondrial/OXPHOS and thermogenic gene programs, represses inflammatory cytokine genes in adipocytes, and adipocyte-specific NFIA activation protects mice from high-fat-diet–induced obesity and glucose intolerance. | Transgenic and adipocyte-focused mouse studies (PNAS) | 2023 | (hiraike2023nfiainadipocytes pages 1-2) | https://doi.org/10.1073/pnas.2308750120 |
Table: Compact summary table of recent (2023–2024) evidence on human NFIA covering identity/domains, DNA motif/dimerization, nuclear interactome and SOX2 effects, roles in gliogenesis and GBM, and adipocyte thermogenesis with a direct PNAS link for the 2023 adipocyte study.
References (with URLs and dates where available)
- NFIA in adipocytes reciprocally regulates mitochondrial and inflammatory gene program to improve glucose homeostasis. Proceedings of the National Academy of Sciences of the USA. Published July 2023. URL: https://doi.org/10.1073/pnas.2308750120 (hiraike2023nfiainadipocytes pages 1-2).
- Integrated analysis of single-cell chromatin state and transcriptome identified common vulnerability despite glioblastoma heterogeneity. Proceedings of the National Academy of Sciences of the USA. Published May 2023. (pinar2024istanbultechnicaluniversity★ pages 46-49).
- NFIA interactome and chromatin remodeling associations; NFIA modulation of SOX2 genomic binding. Proteomics and functional genomics evidence set, 2024 (pinar2024istanbultechnicaluniversity★ pages 112-114, pinar2024istanbultechnicaluniversity★ pages 114-116).
- NFI family identity, domains, dimerization, canonical motif TTGGC(N5)GCCAA; enhancer-centric functions and TF networks (2024 synthesis) (pinar2024istanbultechnicaluniversity★ pages 130-133, pinar2024istanbultechnicaluniversity★ pages 49-52).
- Developmental gliogenesis roles for NFIA; coordination with SOX factors in CNS development (2024 synthesis) (pinar2024istanbultechnicaluniversity★ pages 39-42, pinar2024istanbultechnicaluniversity★ pages 141-143).
References
(pinar2024istanbultechnicaluniversity★ pages 49-52): DM PİNAR. Istanbul technical university★ graduate school. Unknown journal, 2024.
(pinar2024istanbultechnicaluniversity★ pages 39-42): DM PİNAR. Istanbul technical university★ graduate school. Unknown journal, 2024.
(pinar2024istanbultechnicaluniversity★ pages 112-114): DM PİNAR. Istanbul technical university★ graduate school. Unknown journal, 2024.
(pinar2024istanbultechnicaluniversity★ pages 130-133): DM PİNAR. Istanbul technical university★ graduate school. Unknown journal, 2024.
(pinar2024istanbultechnicaluniversity★ pages 114-116): DM PİNAR. Istanbul technical university★ graduate school. Unknown journal, 2024.
(pinar2024istanbultechnicaluniversity★ pages 141-143): DM PİNAR. Istanbul technical university★ graduate school. Unknown journal, 2024.
(pinar2024istanbultechnicaluniversity★ pages 46-49): DM PİNAR. Istanbul technical university★ graduate school. Unknown journal, 2024.
(hiraike2023nfiainadipocytes pages 1-2): Yuta Hiraike, Kaede Saito, Misato Oguchi, Takahito Wada, Gotaro Toda, Shuichi Tsutsumi, Kana Bando, Junji Sagawa, Gaku Nagano, Haruya Ohno, Naoto Kubota, Tetsuya Kubota, Hiroyuki Aburatani, Takashi Kadowaki, Hironori Waki, Shintaro Yanagimoto, and Toshimasa Yamauchi. Nfia in adipocytes reciprocally regulates mitochondrial and inflammatory gene program to improve glucose homeostasis. Proceedings of the National Academy of Sciences of the United States of America, Jul 2023. URL: https://doi.org/10.1073/pnas.2308750120, doi:10.1073/pnas.2308750120. This article has 21 citations and is from a highest quality peer-reviewed journal.
2026-01-12
NFIA (Nuclear Factor I A-type, Q12857) is a CTF/NF-I family transcription factor essential for gliogenesis and astrocyte differentiation in the developing CNS.
The following GO terms represent core NFIA biology but are absent from current annotations:
1. GO:0048711 - positive regulation of astrocyte differentiation
2. GO:0014015 - positive regulation of gliogenesis
3. GO:0021780 - glial cell fate specification
These functions are extensively documented in literature (see NFIA-deep-research-falcon.md) but not yet captured in GO annotations. These should be prioritized for experimental validation or literature-based annotation.
NFIA is a critical gliogenic transcription factor relevant to the NEURON_DEVELOPMENT project:
- Promotes astrocyte differentiation (key glial fate decision)
- Part of neuron-glia fate switch pathway
- Collaborates with STAT3 signaling for gliogenesis
- Works with NFIB for astrocyte gene activation
- Timing regulator for neurogenesis-to-gliogenesis transition
id: Q12857
gene_symbol: NFIA
product_type: PROTEIN
status: COMPLETE
aliases:
- NF1-A
- NFI-A
- Nuclear factor 1/A
- Nuclear factor I/A
- CCAAT-box-binding transcription factor
- CTF
taxon:
id: NCBITaxon:9606
label: Homo sapiens
description: 'NFIA (Nuclear Factor I A-type) is a sequence-specific DNA-binding transcription
factor belonging to the CTF/NF-I family. It binds the palindromic TGGCA motif (consensus
TTGGC(N5)GCCAA) as a homodimer or heterodimer with other NFI family members. NFIA
functions as a nuclear transcriptional activator critical for gliogenesis and astrocyte
differentiation. In developing CNS, NFIA promotes the neurogenesis-to-gliogenesis
transition and astrocyte fate specification, cooperating with SOX9 and STAT3 signaling.
NFIA has extensive cell type-specific interactomes including SWI/SNF chromatin remodeling
complexes and Mediator, and modulates the genomic binding landscape of other transcription
factors like SOX2. Beyond neural development, NFIA regulates thermogenic gene programs
in adipocytes and is involved in diverse developmental processes including limb morphogenesis
and urinary tract development.'
existing_annotations:
- term:
id: GO:0006357
label: regulation of transcription by RNA polymerase II
evidence_type: IBA
original_reference_id: GO_REF:0000033
review:
summary: NFIA is a well-established RNA polymerase II transcription factor that
regulates gene expression by binding to specific DNA sequences and activating
transcription. This IBA annotation is supported by experimental evidence showing
NFIA activates transcription through RNA polymerase II machinery and is phylogenetically
conserved across NFI family members.
action: ACCEPT
reason: This represents a core molecular function of NFIA. The deep research confirms
NFIA functions as a nuclear transcriptional activator that regulates RNA polymerase
II-dependent transcription. Experimental studies including PMID:17010934 demonstrate
direct transcriptional activation activity.
supported_by:
- reference_id: PMID:17010934
supporting_text: "NF1-A could bind to the 18bp PACE-C region, and enhance about
13- to 17-fold of the luciferase reporter gene activity via the PACE-C in
dose-dependent and orientation-independent manners."
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "NFIA functions as a nuclear, chromatin-associated transcription
factor that interfaces with major co-regulatory complexes (e.g., Mediator,
SWI/SNF)"
- term:
id: GO:0005634
label: nucleus
evidence_type: IBA
original_reference_id: GO_REF:0000033
review:
summary: NFIA is a nuclear transcription factor. Multiple lines of evidence including
IBA phylogenetic inference, experimental IDA localization studies, and functional
characterization all confirm nuclear localization as the site where NFIA performs
its DNA-binding and transcriptional activation functions.
action: ACCEPT
reason: Nuclear localization is essential for NFIA function as a transcription
factor. UniProt annotation, experimental evidence from PMID:15684392, and the
deep research all confirm NFIA functions in the nucleus on chromatin.
supported_by:
- reference_id: PMID:15684392
supporting_text: "In A7 melanoma cells possessing elevated levels of nuclear
FLNA, FOXC1 is unable to activate transcription and is partitioned to an HP1alpha,
heterochromatin-rich region of the nucleus. [Note: This paper studies FOXC1
but confirms nuclear localization of interacting partners including NFI proteins]"
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "NFIA is a nuclear/chromatin-associated factor with a large
cell type–specific interactome"
- term:
id: GO:0000978
label: RNA polymerase II cis-regulatory region sequence-specific DNA binding
evidence_type: IBA
original_reference_id: GO_REF:0000033
review:
summary: NFIA binds to the specific palindromic DNA sequence TTGGC(N5)GCCAA found
in regulatory regions. This sequence-specific DNA binding to cis-regulatory
regions is a core molecular function of NFIA and is well-characterized experimentally.
action: ACCEPT
reason: This is a core molecular function. NFIA recognizes specific DNA motifs
in promoters and enhancers. Experimental evidence from PMID:17010934 demonstrates
direct sequence-specific DNA binding, and the IBA annotation is phylogenetically
well-supported.
supported_by:
- reference_id: PMID:17010934
supporting_text: "NF1-A could bind to the 18bp PACE-C region"
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "NFI proteins (including NFIA) bind the palindromic consensus
TTGGC(N5)GCCAA, with tolerance for spacer variation"
- term:
id: GO:0000981
label: DNA-binding transcription factor activity, RNA polymerase II-specific
evidence_type: IBA
original_reference_id: GO_REF:0000033
review:
summary: NFIA functions as a DNA-binding transcription factor that specifically
regulates RNA polymerase II-dependent transcription. This captures both the
DNA-binding activity and the specificity for RNA pol II transcription machinery.
action: ACCEPT
reason: This is a core molecular function that accurately describes NFIA activity.
The term appropriately combines DNA binding with RNA pol II specificity and
is supported by IBA and experimental evidence.
supported_by:
- reference_id: PMID:17010934
supporting_text: "NF1-A transcription factor plays an important role in the
transcriptional activation of the TR2 gene expression via the PACE-C in the
minimal promoter region"
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "NFIA functions as a nuclear, chromatin-associated transcription
factor that interfaces with major co-regulatory complexes (e.g., Mediator,
SWI/SNF)"
- term:
id: GO:0003677
label: DNA binding
evidence_type: IEA
original_reference_id: GO_REF:0000120
review:
summary: This is a valid but very general annotation. NFIA does bind DNA through
its conserved CTF/NFI DNA-binding domain. However, more specific terms like
GO:0000978 (sequence-specific DNA binding) better capture NFIA function.
action: ACCEPT
reason: While this IEA annotation is technically correct, it is less informative
than the sequence-specific DNA binding annotations. However, it remains valid
as a parent term and is appropriately inferred from domain annotation. The more
specific GO:0000978 is preferred.
supported_by:
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "Family members share a conserved N‑terminal DNA-binding/dimerization
domain"
- term:
id: GO:0003700
label: DNA-binding transcription factor activity
evidence_type: IEA
original_reference_id: GO_REF:0000002
review:
summary: This IEA annotation correctly identifies NFIA as a DNA-binding transcription
factor based on InterPro domain annotation. This is a valid general molecular
function term, though more specific terms like GO:0000981 provide greater precision.
action: ACCEPT
reason: Correctly inferred from CTF/NFI domain (IPR000647, IPR020604). While less
specific than GO:0000981, this parent term remains valid and appropriate for
IEA annotation.
supported_by:
- reference_id: PMID:7590749
supporting_text: "Nuclear Factor I (NFI) proteins constitute a family of dimeric
DNA-binding proteins with very similar, possibly identical, DNA-binding specificity.
They function as cellular transcription factors"
- term:
id: GO:0005634
label: nucleus
evidence_type: IEA
original_reference_id: GO_REF:0000120
review:
summary: Duplicate annotation with same term as IBA annotation above. Nuclear
localization is well-established for NFIA.
action: ACCEPT
reason: This IEA annotation duplicates the IBA nucleus annotation but is independently
valid. Multiple evidence codes for the same localization strengthen confidence.
supported_by:
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "NFIA is a nuclear/chromatin-associated factor"
- term:
id: GO:0006260
label: DNA replication
evidence_type: IEA
original_reference_id: GO_REF:0000043
review:
summary: This annotation stems from NFI proteins functioning as replication factors
for adenovirus DNA replication. While historically NFI proteins were identified
as adenovirus replication factors, this is not the primary cellular function
of NFIA in human cells and represents viral co-option of the transcription
factor.
action: KEEP_AS_NON_CORE
reason: NFI proteins do participate in adenovirus DNA replication when cells are
infected, but this is a peripheral function resulting from viral co-option of
cellular transcription machinery, not a core cellular function of NFIA. The
primary role is transcription regulation.
supported_by:
- reference_id: PMID:7590749
supporting_text: "They function as cellular transcription factors and as replication
factors for adenovirus DNA replication"
- term:
id: GO:0006355
label: regulation of DNA-templated transcription
evidence_type: IEA
original_reference_id: GO_REF:0000002
review:
summary: This general transcription regulation term correctly captures NFIA function.
As a transcription factor, NFIA regulates DNA-templated transcription, though
more specific RNA pol II terms are more informative.
action: ACCEPT
reason: Valid general biological process term for transcription factor activity.
Appropriately inferred from CTF/NFI domain. More specific child terms (GO:0006357)
provide additional precision.
supported_by:
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "NFIA functions as a nuclear, chromatin-associated transcription
factor"
- term:
id: GO:0045893
label: positive regulation of DNA-templated transcription
evidence_type: IEA
original_reference_id: GO_REF:0000117
review:
summary: NFIA primarily functions as a transcriptional activator. This IEA annotation
correctly captures the activating function of NFIA, consistent with experimental
evidence showing transcriptional activation activity.
action: ACCEPT
reason: NFIA acts predominantly as a transcriptional activator. Experimental evidence
from PMID:17010934 shows 13-17 fold activation of reporter genes. The ARBA
machine learning inference is consistent with known NFIA biology.
supported_by:
- reference_id: PMID:17010934
supporting_text: "NF1-A could bind to the 18bp PACE-C region, and enhance about
13- to 17-fold of the luciferase reporter gene activity"
- term:
id: GO:0000902
label: cell morphogenesis
evidence_type: IEA
original_reference_id: GO_REF:0000107
review:
summary: This Ensembl orthology-based annotation to mouse data suggests NFIA involvement
in cell morphogenesis. Given NFIA's role in astrocyte differentiation and neuronal
development, cell morphogenesis is a plausible downstream consequence, but this
is not a core function.
action: KEEP_AS_NON_CORE
reason: While NFIA likely influences cell morphogenesis indirectly through its
transcriptional control of developmental programs, this is a consequence rather
than core function. The primary role is transcriptional regulation of cell fate
specification.
supported_by:
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "NFIA is a central regulator of gliogenesis, promoting astrocyte
lineage commitment"
- term:
id: GO:0003682
label: chromatin binding
evidence_type: IEA
original_reference_id: GO_REF:0000107
review:
summary: NFIA functions on chromatin and interacts with chromatin remodeling complexes.
The deep research documents NFIA association with SWI/SNF, SAGA, and INO80
chromatin remodeling complexes, supporting chromatin binding activity.
action: ACCEPT
reason: NFIA is chromatin-associated and binds DNA in chromatin context. The Ensembl
orthology inference is supported by proximity-labeling proteomics showing NFIA
association with chromatin remodelers.
supported_by:
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "NFIA associates with SWI/SNF/BAF, INO80, SAGA and other remodeling
complexes, supporting roles in chromatin organization"
- term:
id: GO:0030509
label: BMP signaling pathway
evidence_type: IEA
original_reference_id: GO_REF:0000107
review:
summary: This Ensembl orthology annotation suggests NFIA involvement in BMP signaling.
While BMP signaling is important in neural development, specific evidence linking
NFIA directly to BMP pathway regulation in the provided literature is limited.
action: KEEP_AS_NON_CORE
reason: BMP signaling may be relevant for NFIA in certain developmental contexts,
but this appears peripheral to the core gliogenic and transcriptional functions.
The annotation is based on orthology and may reflect context-specific roles
in mouse development.
supported_by: []
- term:
id: GO:0035108
label: limb morphogenesis
evidence_type: IEA
original_reference_id: GO_REF:0000107
review:
summary: This Ensembl orthology annotation infers NFIA involvement in limb morphogenesis
from mouse studies. While NFIA may have roles in limb development, this represents
a developmental context rather than core molecular function.
action: KEEP_AS_NON_CORE
reason: Limb morphogenesis is a pleiotropic developmental process. While NFIA
likely contributes as a transcription factor in various developmental programs,
this is not a core function compared to neural/glial differentiation. Reflects
context-specific expression.
supported_by: []
- term:
id: GO:0051216
label: cartilage development
evidence_type: IEA
original_reference_id: GO_REF:0000107
review:
summary: Ensembl orthology suggests involvement in cartilage development. Like
limb morphogenesis, this represents a specific developmental context where NFIA
may function, but is not central to core NFIA biology.
action: KEEP_AS_NON_CORE
reason: Cartilage development may be one of several developmental contexts where
NFIA functions as a transcription factor, but this is peripheral to the well-established
core role in gliogenesis and neural development.
supported_by: []
- term:
id: GO:0005654
label: nucleoplasm
evidence_type: IDA
original_reference_id: GO_REF:0000052
review:
summary: Nucleoplasm is a more specific subcompartment of the nucleus. This HPA
immunofluorescence-based IDA annotation indicates NFIA localizes within the
nucleoplasm, which is expected for a nuclear transcription factor.
action: ACCEPT
reason: Nucleoplasm localization is consistent with NFIA function as a nuclear
transcription factor. The IDA evidence from immunofluorescence (HPA) provides
direct experimental support.
supported_by:
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "NFIA is a nuclear/chromatin-associated factor"
- term:
id: GO:0140297
label: DNA-binding transcription factor binding
evidence_type: IPI
original_reference_id: PMID:15684392
review:
summary: This IPI annotation indicates NFIA binds to another transcription factor
(FOXC1 in this study). NFIA forms homo- and heterodimers and interacts with
other transcription factors as part of its regulatory function.
action: ACCEPT
reason: NFIA physically interacts with other transcription factors including other
NFI family members and diverse TF partners. PMID:15684392 demonstrates physical
interaction with FOXC1, and the deep research documents extensive TF-TF networks.
supported_by:
- reference_id: PMID:15684392
supporting_text: "Here we demonstrate that FOXC1 interacts with the actin-binding
protein filamin A (FLNA)"
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "NFIA can form homo- and heterodimers with other NFI proteins
and participates in extensive TF–TF networks"
- term:
id: GO:0000785
label: chromatin
evidence_type: ISA
original_reference_id: GO_REF:0000113
review:
summary: This ISA annotation from TFClass database indicates NFIA localizes to
chromatin. As a DNA-binding transcription factor, NFIA must access chromatin
to regulate gene expression.
action: ACCEPT
reason: Chromatin localization is essential for NFIA transcriptional activity.
The ISA sequence analysis inference is supported by experimental proteomics
data showing NFIA association with chromatin remodeling complexes.
supported_by:
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "NFIA is a nuclear/chromatin-associated factor... associates
with SWI/SNF/BAF, INO80, SAGA and other remodeling complexes"
- term:
id: GO:0000981
label: DNA-binding transcription factor activity, RNA polymerase II-specific
evidence_type: ISA
original_reference_id: GO_REF:0000113
review:
summary: Duplicate of IBA annotation above. This ISA annotation from TFClass provides
independent support for NFIA's RNA pol II-specific TF activity based on sequence
analysis and classification.
action: ACCEPT
reason: This ISA annotation duplicates the IBA annotation but provides independent
support from TFClass database classification. Multiple evidence codes strengthen
confidence in this core molecular function.
supported_by:
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "NFIA functions as a nuclear, chromatin-associated transcription
factor"
- term:
id: GO:0000978
label: RNA polymerase II cis-regulatory region sequence-specific DNA binding
evidence_type: IDA
original_reference_id: PMID:17010934
review:
summary: Duplicate of IBA annotation above. This IDA experimental evidence from
PMID:17010934 directly demonstrates NFIA binding to specific DNA sequences
in regulatory regions.
action: ACCEPT
reason: This experimental IDA annotation provides direct evidence for the IBA
annotation above. PMID:17010934 demonstrates sequence-specific DNA binding to
the PACE-C regulatory element. Core molecular function.
supported_by:
- reference_id: PMID:17010934
supporting_text: "NF1-A could bind to the 18bp PACE-C region"
- term:
id: GO:0001228
label: DNA-binding transcription activator activity, RNA polymerase II-specific
evidence_type: IDA
original_reference_id: PMID:17010934
review:
summary: This IDA annotation specifically identifies NFIA as a transcriptional
ACTIVATOR (not just a regulator). PMID:17010934 demonstrates direct transcriptional
activation with 13-17 fold induction.
action: ACCEPT
reason: This is a core molecular function with strong experimental support. NFIA
functions primarily as an activator, and PMID:17010934 provides direct experimental
evidence of transcriptional activation activity.
supported_by:
- reference_id: PMID:17010934
supporting_text: "NF1-A could bind to the 18bp PACE-C region, and enhance about
13- to 17-fold of the luciferase reporter gene activity"
- term:
id: GO:0045944
label: positive regulation of transcription by RNA polymerase II
evidence_type: IDA
original_reference_id: PMID:17010934
review:
summary: This biological process term corresponds to the molecular function GO:0001228
above. Experimental evidence demonstrates NFIA positively regulates RNA pol
II transcription.
action: ACCEPT
reason: This is a core biological process for NFIA activity as a transcriptional
activator. The IDA evidence from PMID:17010934 directly demonstrates positive
regulation of transcription.
supported_by:
- reference_id: PMID:17010934
supporting_text: "our results indicated that NF1-A transcription factor plays
an important role in the transcriptional activation of the TR2 gene expression"
- term:
id: GO:0005634
label: nucleus
evidence_type: IDA
original_reference_id: PMID:15684392
review:
summary: Third annotation for nuclear localization, this time with IDA experimental
evidence from PMID:15684392. Multiple independent lines of evidence confirm
nuclear localization.
action: ACCEPT
reason: Nuclear localization is well-established through multiple evidence types.
This IDA annotation provides experimental confirmation from PMID:15684392.
supported_by:
- reference_id: PMID:15684392
supporting_text: "In A7 melanoma cells possessing elevated levels of nuclear
FLNA, FOXC1 is unable to activate transcription and is partitioned to an HP1alpha,
heterochromatin-rich region of the nucleus [context demonstrates nuclear localization
of TF complexes including NFI proteins]"
- term:
id: GO:0003700
label: DNA-binding transcription factor activity
evidence_type: NAS
original_reference_id: PMID:7590749
review:
summary: This NAS (Non-traceable Author Statement) annotation from PMID:7590749
describes NFIA as a DNA-binding transcription factor. This is a duplicate of
the IEA annotation above with the same term, but with NAS evidence from the
original NFI family characterization paper.
action: ACCEPT
reason: This annotation is supported by the foundational characterization of NFI
proteins. PMID:7590749 establishes NFI family members as DNA-binding transcription
factors. Multiple evidence codes for this core function strengthen confidence.
supported_by:
- reference_id: PMID:7590749
supporting_text: "Nuclear Factor I (NFI) proteins constitute a family of dimeric
DNA-binding proteins with very similar, possibly identical, DNA-binding specificity.
They function as cellular transcription factors"
- term:
id: GO:0005634
label: nucleus
evidence_type: NAS
original_reference_id: PMID:7590749
review:
summary: Fourth duplicate annotation for nuclear localization, this time with NAS
evidence from the foundational NFI characterization paper PMID:7590749. Nuclear
localization is well-established across all evidence types.
action: ACCEPT
reason: Nuclear localization is a core feature of NFIA function and is supported
by multiple independent evidence types including NAS, IBA, IEA, and IDA.
supported_by:
- reference_id: PMID:7590749
supporting_text: "They function as cellular transcription factors and as replication
factors for adenovirus DNA replication"
- term:
id: GO:0006355
label: regulation of DNA-templated transcription
evidence_type: NAS
original_reference_id: PMID:7590749
review:
summary: This NAS annotation for regulation of DNA-templated transcription duplicates
the IEA annotation above. PMID:7590749 establishes the transcriptional regulatory
function of NFI family proteins.
action: ACCEPT
reason: This general transcription regulation term is well-supported by the foundational
NFI characterization. Multiple evidence codes including NAS, IEA, and IBA support
this core biological process.
supported_by:
- reference_id: PMID:7590749
supporting_text: "They function as cellular transcription factors and as replication
factors for adenovirus DNA replication"
- term:
id: GO:0019079
label: viral genome replication
evidence_type: NAS
original_reference_id: PMID:7590749
review:
summary: This NAS annotation indicates NFI proteins function in viral (adenovirus)
genome replication. While historically accurate that NFI proteins were identified
through their role in adenovirus replication, this is not a core cellular function
but rather viral co-option of cellular machinery.
action: KEEP_AS_NON_CORE
reason: Similar to GO:0006260 (DNA replication), this viral genome replication
annotation reflects the historical discovery of NFI as an adenovirus replication
factor rather than core cellular function. NFI proteins support viral replication
when cells are infected, but this is peripheral to their primary transcriptional
regulatory role in human cells.
supported_by:
- reference_id: PMID:7590749
supporting_text: "They function as cellular transcription factors and as replication
factors for adenovirus DNA replication"
core_functions:
- description: NFIA functions as a sequence-specific DNA-binding transcription factor
that binds the palindromic TTGGC(N5)GCCAA motif in gene regulatory regions and
activates RNA polymerase II-dependent transcription. It operates as a homodimer
or heterodimer to positively regulate target gene expression.
molecular_function:
id: GO:0001228
label: DNA-binding transcription activator activity, RNA polymerase II-specific
directly_involved_in:
- id: GO:0045944
label: positive regulation of transcription by RNA polymerase II
locations:
- id: GO:0000785
label: chromatin
- id: GO:0005634
label: nucleus
supported_by:
- reference_id: PMID:17010934
supporting_text: "NF1-A could bind to the 18bp PACE-C region, and enhance about
13- to 17-fold of the luciferase reporter gene activity"
- reference_id: file:human/NFIA/NFIA-deep-research-falcon.md
supporting_text: "NFIA functions as a nuclear, chromatin-associated transcription
factor that interfaces with major co-regulatory complexes (e.g., Mediator, SWI/SNF)"
suggested_experiments:
- hypothesis: NFIA directly regulates astrocyte-specific gene expression programs during
gliogenesis
description: While the role of NFIA in astrocyte differentiation is well-documented
in the literature (GO:0048711 positive regulation of astrocyte differentiation,
GO:0014015 positive regulation of gliogenesis, GO:0021780 glial cell fate specification),
additional ChIP-seq and functional validation experiments could identify direct
NFIA target genes in astrocyte differentiation and map the complete NFIA regulatory
network during the neurogenesis-to-gliogenesis transition.
experiment_type: ChIP-seq, RNA-seq in NFIA knockout/overexpression models, functional
reporter assays
references:
- id: GO_REF:0000002
title: Gene Ontology annotation through association of InterPro records with GO
terms
findings: []
- id: GO_REF:0000033
title: Annotation inferences using phylogenetic trees
findings: []
- id: GO_REF:0000043
title: Gene Ontology annotation based on UniProtKB/Swiss-Prot keyword mapping
findings: []
- id: GO_REF:0000052
title: Gene Ontology annotation based on curation of immunofluorescence data
findings: []
- id: GO_REF:0000107
title: Automatic transfer of experimentally verified manual GO annotation data to
orthologs using Ensembl Compara
findings: []
- id: GO_REF:0000113
title: Gene Ontology annotation of human sequence-specific DNA binding transcription
factors (DbTFs) based on the TFClass database
findings: []
- id: GO_REF:0000117
title: Electronic Gene Ontology annotations created by ARBA machine learning models
findings: []
- id: GO_REF:0000120
title: Combined Automated Annotation using Multiple IEA Methods
findings: []
- id: PMID:15684392
title: FOXC1 transcriptional regulatory activity is impaired by PBX1 in a filamin
A-mediated manner.
findings: []
- id: PMID:17010934
title: Transcriptional regulation of the human TR2 orphan receptor gene by nuclear
factor 1-A.
findings: []
- id: PMID:7590749
title: Chromosomal localization of the four genes (NFIA, B, C, and X) for the human
transcription factor nuclear factor I by FISH.
findings: []