Mir127

RNAcentral ID: URS0000341906_10090
Organism: Mus musculus
Review Status: COMPLETE
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Gene Description

Mir127 encodes the mouse mir-127 precursor from the imprinted Dlk1-Dio3 locus, where it is transcribed from the maternal allele antisense to the paternally expressed retrotransposon-like gene Rtl1. Its mature product is a guide RNA that directs Argonaute/RISC to Rtl1 transcripts in a trans-homologue interaction, and this miR-127-Rtl1 pairing is required for normal placenta development, particularly of the labyrinthine layer. mir-127 is also broadly expressed and consequently appears in unrelated miRNA profiling surveys.

Existing Annotations Review

GO Term Evidence Action Reason
GO:0016442 RISC complex
IEA
GO_REF:0000115
ACCEPT
Summary: Rfam2GO annotation placing the mature miRNA in RISC.
Reason: Mature miR-127 is loaded into Argonaute/RISC; this is core to how the gene product works.
GO:0035195 miRNA-mediated post-transcriptional gene silencing
IEA
GO_REF:0000115
ACCEPT
Summary: Rfam2GO annotation of the generic microRNA process.
Reason: Correct and core: miR-127 silences Rtl1 transcripts through the trans-homologue interaction that defines its known biology.
GO:0001892 embryonic placenta development
IMP
PMID:26138477
A trans-homologue interaction between reciprocally imprinted...
ACCEPT
Summary: The functionally established role of mir-127, from a paper devoted to it.
Reason: Mutant-phenotype evidence from a study whose entire subject is the miR-127-Rtl1 trans-homologue interaction and its effect on the placenta. This is the core specific biology of mir-127 and the correct contrast with the two batch-derived IEP rows below.
Supporting Evidence:
PMID:26138477
A trans-homologue interaction between reciprocally imprinted miR-127 and Rtl1 regulates placenta development
GO:0060711 labyrinthine layer development
IMP
PMID:26138477
A trans-homologue interaction between reciprocally imprinted...
ACCEPT
Summary: The specific placental compartment affected by loss of the miR-127-Rtl1 interaction.
Reason: A more precise statement of the same well-supported placental phenotype, from the same mutant analysis.
Supporting Evidence:
PMID:26138477
A trans-homologue interaction between reciprocally imprinted miR-127 and Rtl1 regulates placenta development
GO:0040029 epigenetic regulation of gene expression
IMP
PMID:26138477
A trans-homologue interaction between reciprocally imprinted...
KEEP AS NON CORE
Summary: Reflects the imprinted, allele-specific nature of the miR-127-Rtl1 pair.
Reason: Defensible - miR-127 acts from the maternal allele on the paternally expressed Rtl1, so allele-specific regulation is genuinely part of the mechanism. Kept as non-core because the imprinting is a property of the locus rather than an activity of the mature miRNA, whose own action is ordinary RISC-mediated repression.
GO:1990830 cellular response to leukemia inhibitory factor
IEP
PMID:20439489
miRNA 34a, 100, and 137 modulate differentiation of mouse em...
MARK AS OVER ANNOTATED
Summary: Batch expression annotation from an embryonic-stem-cell screen in which mir-127 was not among the tested miRNAs.
Reason: One of 291 IEP annotations to this term from a single paper. The study induced ESC differentiation by withdrawing LIF and recorded which miRNAs rose; only miR-34a, miR-100 and miR-137 were then functionally tested, and mir-127 is not among them. A miRNA rising when a cytokine is removed is also a poor fit for "cellular response to leukemia inhibitory factor", which describes a reaction to the presence of LIF. Marked over-annotated rather than removed because only the abstract is cached, so the underlying expression measurement cannot be inspected directly.
Supporting Evidence:
PMID:20439489
We report that 138 miRNAs are increased on the induction of differentiation
GO:0060291 long-term synaptic potentiation
IEP
PMID:25858512
miR-26a and miR-384-5p are required for LTP maintenance and ...
REMOVE
Summary: mir-127 is not discussed anywhere in the cited paper; the row reflects membership of the detected-miRNA set.
Reason: The bottom tier of the 130-member IEP batch from this study. The paper detected 372 miRNAs, found 12 that changed during LTP, and functionally validated three; miR-127 is in none of those groups and the PMC full text does not mention it. The sole fact behind this annotation is that mir-127 was detectable in hippocampal slices. Note also that the same batch omits let-7a, one of the three miRNAs the paper does establish as required, so the cohort is not merely over-inclusive but poorly aligned with the paper's findings.
Supporting Evidence:
PMID:25858512
we identified 372 miRNAs
PMID:25858512
the identification of miR-26a, miR-384-5p and let-7a as essential for LTP maintenance and enlargement of dendritic spines
GO:0040029 epigenetic regulation of gene expression
IDA
PMID:19126398
Aberrant epigenetic reprogramming of imprinted microRNA-127 ...
KEEP AS NON CORE
Summary: Direct-assay support from a study of imprinted miR-127 reprogramming in cloned embryos.
Reason: The cited paper is specifically about aberrant epigenetic reprogramming of imprinted miR-127 and Rtl1, so the term is well matched to the source. Kept as non-core for the same reason as the IMP duplicate above: imprinting is a property of the locus rather than an activity of the mature miRNA.
GO:0070482 response to oxygen levels
IDA
PMID:18723672
Dysregulation of microRNAs after myocardial infarction revea...
UNDECIDED
Summary: Cannot be adjudicated from the cached record.
Reason: The cached publication is abstract-only and concerns miR-29 in cardiac fibrosis after myocardial infarction, with no mention of miR-127 in the abstract. Post-infarction miRNA surveys are exactly the kind of source that produces expression-derived process annotations, but the curator saw the full text, so this is left undecided rather than challenged.

Core Functions

miRNA guide activity directing Argonaute/RISC to Rtl1 transcripts in a trans-homologue interaction between reciprocally imprinted alleles, required for development of the placental labyrinthine layer

Supporting Evidence:
  • PMID:26138477
    A trans-homologue interaction between reciprocally imprinted miR-127 and Rtl1 regulates placenta development

References

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Suggested Questions for Experts

Q: Does mir-127 have any function outside the Dlk1-Dio3 imprinted locus and its Rtl1 target, given that its other annotations all come from profiling surveys?

Suggested experts: imprinting researchers, microRNA biologists

Q: Is the placental requirement for miR-127 entirely explained by Rtl1 repression, or are there additional targets?

Suggested experts: developmental biologists

Suggested Experiments

Experiment: mir-127 deletion combined with Rtl1 dosage correction, scoring labyrinthine layer morphology

Hypothesis: The placental phenotype of mir-127 loss is fully rescued by lowering Rtl1, indicating a single functionally relevant target

Type: mouse genetics

Experiment: Ago CLIP in placental trophoblast comparing wild-type and mir-127-null tissue

Hypothesis: Rtl1 is the dominant mir-127-dependent Argonaute target in placenta

Type: high-throughput sequencing

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