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HPMR

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microRNA 302a OKDB#: 4062
 Symbols: MIR302A Species: human
 Synonyms: MIRN302, MIRN302A, hsa-mir-302,MIRN302, MIRN302A, hsa-mir-302,  Locus: 4q25 in Homo sapiens


For retrieval of Nucleotide and Amino Acid sequences please go to: Entrez Gene
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General Comment This gene promotes pluripotency by regulating OCt4 indirectly by inhibiting NR2F2.

NCBI Summary: microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding. The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq]
General function
Comment
Cellular localization
Comment
Ovarian function
Comment
Expression regulated by
Comment
Ovarian localization Oocyte
Comment Immunofluorescence-based screening identifies germ cell associated microRNA 302 as an antagonist to p63 expression. Scheel AH et al. The tumor suppressor homologue p63 is required for proper skin and limb development, but specific isoforms of it also act as a 'guardian of the germline.' To gain insight into the regulation of p63 expression, we performed immunofluorescence-based screening assays. Using a large collection of microRNA expression plasmids, we identified microRNAs of the 302 cluster as potent suppressors of p63 accumulation in various cell species. MiR-302 reduces p63 protein and mRNA levels through two target sites within the p63 3' untranslated region. In testicular cancer cells, endogenous miR-302 contributes to the suppression of p63. MiR-302 might also contribute to the elimination of p63 in mature oocytes. Thus, miR-302 appears as part of a stringent regulatory mechanism for p63 in germ cells, reminiscent of the tight control for p53 levels in somatic cells.
Follicle stages
Comment
Phenotypes
Mutations 0 mutations
Genomic Region show genomic region
Phenotypes and GWAS show phenotypes and GWAS
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created: April 8, 2009, 12:03 p.m. by: hsueh   email:
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last update: Feb. 9, 2011, 11:19 a.m. by: hsueh    email:



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