GATA1 is a nuclear GATA-motif transcription factor that controls erythroid and megakaryocytic gene expression and contributes to eosinophil lineage commitment. The review distinguishes DNA recognition, recruitment of named transcriptional partners, and downstream cell phenotypes. It does not treat all GATA1-associated proteins as a single constitutive complex.
The proposal contains 120 original contexts, one core function, 54 assessed references and three sequence-verified products. Actions are 57 ACCEPT, 33 MODIFY, 8 KEEP_AS_NON_CORE, 1 TOO_GENERAL, 9 REMOVE, 7 UNDECIDED and 5 MARK_AS_OVER_ANNOTATED. No NEW annotation is proposed. Every original context has readable evidence links; the few exact excerpts are centralized in the relevant row, core or reference finding, while other claims link to the same assessed references.
Human gamma-globin promoter experiments identify the historical erythroid factor GF-1/GATA1 and connect a defined recognition motif to promoter activity (PMID:2467208(https://pubmed.ncbi.nlm.nih.gov/2467208/)). The original ZNF268 study adds EMSA competition and supershift, GATA1/FOG chromatin occupancy and mutant-site reporter tests in K562 cells (PMID:22235304(https://pmc.ncbi.nlm.nih.gov/articles/PMC3250450/), Results paragraphs 19 and 21 and Methods). Its cell-growth experiments perturb ZNF268, not GATA1. These experiments support the specific PolII regulatory-DNA replacements without claiming that GATA1 performs every downstream phenotype.
FOG1, MED1 and CCAR1 have different partner roles. The V205M and D218G studies separate impaired FOG recruitment from retained DNA recognition; the R216Q study instead impairs palindromic-site recognition while preserving FOG interaction (PMID:10700180(https://pubmed.ncbi.nlm.nih.gov/10700180/), PMID:11418466(https://pubmed.ncbi.nlm.nih.gov/11418466/), PMID:12200364(https://pubmed.ncbi.nlm.nih.gov/12200364/)). The complex study resolves TAL1/LDB1, FOG1/MeCP1, GFI1B and ACF/WCRF contexts, with FOG1 bridging GATA1 to MeCP1 (PMID:15920471(https://pubmed.ncbi.nlm.nih.gov/15920471/)). Its construct provenance explicitly traces to murine tagged GATA1 in the cited original; a human beta-globin cassette does not change that identity.
MED1 interactions and CCAR1/CoCoA recruitment are supported by selected original two-hybrid, pulldown, occupancy and reporter experiments (PMID:17132730(https://pubmed.ncbi.nlm.nih.gov/17132730/), PMID:24245781(https://pubmed.ncbi.nlm.nih.gov/24245781/)). The N-finger and C-finger mappings belong to their respective constructs. A cofactor's own catalytic or bridging activity is not assigned to GATA1. For partner-directed binding terms, the identity and role of the protein being bound determine specificity: FOG1 is a coregulator, MED1/CCAR1 are coactivating partners, and NRF2/HOXA1/PU1/CEBPE are DNA-binding transcription factors.
GATA1 external target evidence preserves the small original HI-II-14, NRF2 and SPOP-F133L subsets, workbook hashes and exact spreadsheet locators. It is supported by the original source, not a replacement source acquisition. Positive generic-binding removal retains detection and avoids implying that the interaction is false. The retained Q8TES7 UniProt record directly identifies FBF1 and declares isoform 6; this resolves the partner identity, while exact pair-specific clone equivalence remains unproven. The positive GATA1–FBF1 pair is retained and uninformative generic binding is removed. Published HI-II-14 pairs underwent quadruplicate retesting (at least 3/4 positive), autoactivation counterselection and sequence confirmation. HOXA1/HEXIM2 binding refinements use their verified partner roles; they do not assert a physiological effect or pair-specific orthogonal validation. Positive SPOP-F133L results do not establish wild-type SPOP association or physiological ubiquitination.
The caspase-3 row is a genuine substrate/cleavage context: its literal partner is P42574 and its original apoptosis-related extension is preserved (PMID:17167422(https://pubmed.ncbi.nlm.nih.gov/17167422/)). Hsp70 protection is a separate interaction in that paper. The inspected original supplement Methods and main figure captions distinguish withdrawal observations from mutant rescue following Hsp70 depletion while Epo and IL3 remain present. Neither condition is substituted for the other; full main Results and images were unavailable to this reading.
Current UniProt declares P15976-1 (413 residues), P15976-2 (335) and P15976-3/GATA1s (330). All available direct FASTAs agree with the supplied sequence-feature reconstruction. P15976-2 replaces residues 290–413 with an alternative C terminus; GATA1s lacks residues 1–83. The original HI-II-14 library ORF6313 translates exactly to P15976-2, but its network table is gene-level and does not assign that clone to every pair.
The original alternative-initiation study directly observes natural human K562 long/short proteins. Its mouse codon 1/84 constructs show weaker short-form transactivation with retained DNA-binding specificity and comparable expression; heterodimer immunoprecipitation uses mouse MEL cells (PMID:8524811(https://pmc.ncbi.nlm.nih.gov/articles/PMC40449/), original pages 11598–11601). GATA1s lacks the N-terminal transactivation region. The authentic short-form-only disease abstract reports impaired human erythropoiesis and describes somatic short-form-only mutations in Down-syndrome-associated transient abnormal myelopoiesis and acute megakaryoblastic leukemia (PMID:16783379(https://pubmed.ncbi.nlm.nih.gov/16783379/)). It does not make normal GATA1s expression sufficient for leukemia. Main full text remains inaccessible and the inspected supplementary Figure 1 measures RNA. Functional biology is recorded in the three existing product descriptions; alternative initiation is not relabeled as an alternative splice mechanism or a fabricated functional-isoform enum.
Erythroid and megakaryocytic programs are supported by direct regulatory assays, human variants and conserved functional experiments. Eosinophil commitment is supported by selected original human-progenitor recipient and mouse deficiency/rescue experiments using explicitly murine GATA cDNAs (PMID:12045236(https://pmc.ncbi.nlm.nih.gov/articles/PMC2193540/)). GATA1 performs transcriptional regulation in these programs; it is not merely a substrate or a passive marker.
The broad anatomical-morphogenesis context is true but classified TOO_GENERAL: the verified path is platelet formation GO:0030220 part_of platelet morphogenesis GO:0036344 is_a cell morphogenesis GO:0000902 is_a anatomical structure morphogenesis GO:0009653. The earlier label for GO:0036344 was incorrect; the first edge remains part_of. Cell fate commitment remains ACCEPT because it represents the conserved cross-lineage role rather than only the separately asserted eosinophil commitment. That specific path does not establish every gross anatomical or system-development assertion. Liver-regeneration over-annotation retains the genuine rat nuclear-extract GATA activity assay but does not convert a tissue-response profile into a direct Gata1 perturbation mechanism (PMID:18990226(https://pmc.ncbi.nlm.nih.gov/articles/PMC2613928/)).
Seven source-specific uncertainties remain: FOG-domain orientation, male-gonad development, two glycoprotein-biosynthesis claims, basophil differentiation, Sertoli-cell development and the exact absent-ligand apoptotic process. The original cryptorchidism report itself leaves causality unclear. Abstract-access limits do not establish wrong-gene attribution, and phenotype or surface abundance does not by itself distinguish synthesis from trafficking or turnover. Rat and mouse donor evidence remains provenance for the human transfer; donor extension contexts are not imported into human rows.
The rat mast-cell LPS study includes IL5-promoter ChIP and cytokine output, supporting non-core retention beyond expression alone; its abstract does not expose GATA1-versus-GATA2 antibody specificity (PMID:17687519(https://pubmed.ncbi.nlm.nih.gov/17687519/)). The testicular study shows FSH suppression in rat Sertoli cells and cAMP effects on mouse MA-10 Gata1 RNA/protein, with reduced INHA-motif EMSA binding reported as data not shown. Its Discussion cites prior ref16 for GATA-site mutations leaving cAMP stimulation intact and treats GATA1–CREB competition as unresolved. Those responses do not establish the transferred GATA1 participation claims, so cAMP/FSH become MARK_AS_OVER_ANNOTATED. Selected original Methods/Results/Discussion pp 830–834 were read in the author-uploaded article; the normal PMID:11861504 cache remains abstract-only. The separate Sertoli-development U uses PMID:9089398, not the same experiment.
The exact canonical P15976 sequence occupies PTHR10071 AN175/PTN002467682 in the retained actual tree/MSA (472 nodes, 255 leaves, 2,602 alignment columns). Five IBA origins are AN0/PTN001600628 and the cell-fate origin is AN3/PTN000800998. These nodes lie on the target lineage. No retained negative assertion lies on that lineage. Target self-donors are legitimate experimental grounding; donor count is not a quality criterion. The original-context archive retains dated/current donor-set differences literally.
Normal Reactome events support nucleoplasmic regulatory complexes without assigning MLL methyltransferase chemistry to GATA1. Official participant links for R-HSA-8956568 and R-HSA-996755 resolve to GATA1 entity R-HSA-996772, P15976 residues 1–413, in the nucleoplasm. They are alternative-member sets, not assays of every paralog combination. These chains were read on official HTML after ContentService failures. The complete retained GO-CAM index had no literal P15976/GATA1 target match; absence is not used to manufacture a process assertion.
The bounded source union has 59 paths: 43 publication caches, 13 Reactome records and three PTHR10071 files. At the native base 21f1839ca8438d687961d9f71bf4a2e2a6d55b46, 28 were already present; three newly acquired N-owned publications (12045236, 12483298 and 22390417) are published at GATA2 PR5952 head70e9232 and frozen for immutable reuse, 27 were acquired by F using genuine missing-only native functions, and N-owned R-HSA-983231 remains unavailable after an actual HTTP 521 response. No placeholder cache is created. The separate open family-review YAML is excluded.
Each of the 54 assessed references states whether evidence was an authentic abstract, selected original text, visually inspected pages, a retained supplementary table, an official method page or a model participant chain. Original-paper detail is not silently represented as present in an abstract-only repository cache. All seven short excerpts now match the actual native publication caches or portable target file, with exact offsets retained alongside the original-source locators. Their text is not duplicated in this guide or notes. The compact source evidence preserves all 120 literal contexts, six conjunctive extensions/eight atoms, actual native joins and source-access limits. All 120 records and all 16 export columns reconcile exactly; three products and eight structured atoms are verified. The published 3a723ee baseline completed native default/strict/history/status/render/link/whitespace checks with one intentional GO:0061629 partner-specific advisory and DRAFT status. The bounded follow-up retains seven UNDECIDED judgments. Its genuine codex EDIT history and affected default/strict/status/history/private-render/local-link/whitespace checks passed with the same intentional advisory and DRAFT status. The PU.1-versus-FOG1 distinction is unchanged.
The broad anatomical-morphogenesis row is true but now classified TOO_GENERAL because accepted platelet formation already entails it through the verified part_of/is_a path. Eight specific non-core contexts remain after the two source-specific cAMP/FSH adaptations. This action concerns informativeness, not rejection of the ARBA source. The 59-path plan yielded 58 real source files; R-HSA-983231 remains unavailable under the separately recorded N acquisition failure.
The authentic supplementary workbook for PMID:28473536(https://pubmed.ncbi.nlm.nih.gov/28473536/) (SHA256 4994eb7b3e33eb301541cf7d53d8be0936d5bdb6b504f5d63719e133f40004a6) resolves the earlier table-access limit. Table S1, sheet S1 sequence information, row 293 lists GATA1 eDBD and FL sequences. The positive methyl-HT-SELEX and HT-SELEX models at Table S2, sheet S2 PWM models, rows 8218–8222 and 8223–8227 both specify eDBD. Their matrices describe enriched sequence motifs; the selected original Methods 87–103 do not make these exact affinity constants or endogenous promoter-location measurements. No natural-product mapping or GATA1-specific bisulfite classification is inferred. The more specific Pol II cis-regulatory term retains independent human promoter support. No new quotation or source-cache modification accompanies this access update.