MIR133B Gene

HGNC Family Non-coding RNAs
Name microRNA 133b
Description 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 encoded miRNA is considered a canonical myomiR and is important for normal cardiac and skeletal muscle development. It is additionally important for normal development in non-muscle tissues, and is abnormally expressed in a variety of cancers. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq, Sep 2017]
Summary
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In the midbrain, miR‐133b participates in a negative feedback circuit with the transcription factor Pitx3, thereby modulating the maturation and function of dopaminergic neurons—a finding that has significant implications for Parkinson’s disease pathology."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": " In skeletal and cardiac muscle, it is co‐expressed with other muscle‐specific RNAs to regulate myoblast differentiation and contractile function."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": " Moreover, miR‐133b is differentially expressed in immune subsets such as Th17 cells, where its co‐regulation with the Il17a/f locus marks a specific signature of IL‑17–producing immune responses"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": ", and its perturbation in cardiac tissues has been linked with abnormal ion channel expression contributing to arrhythmogenic phenotypes."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": " In genetic variant analyses, no strong association of polymorphisms in miR‐133b with Parkinson’s disease was found, suggesting that its regulatory role is predominantly post‐transcriptional."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "6"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn a wide spectrum of human cancers—including esophageal, gastric, lung, prostate, colorectal, osteosarcoma, bladder and breast carcinomas—miR‐133b is frequently downregulated, and its restoration has been shown to suppress tumor cell proliferation, migration, invasion, and enhance apoptosis. Functional studies indicate that miR‐133b exerts its tumor‐suppressive actions by targeting multiple oncogenic effectors including FSCN1"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "7"}]}, {"type": "t", "text": ", MET"}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "8", "end_ref": "10"}]}, {"type": "t", "text": ", EGFR"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "11"}]}, {"type": "t", "text": ", FGFR1"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "13"}]}, {"type": "t", "text": ", MMP‑9"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "14"}]}, {"type": "t", "text": ", PTBP1"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "15"}]}, {"type": "t", "text": ">"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "10"}]}, {"type": "t", "text": ", DOT1L"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "16"}]}, {"type": "t", "text": ", TIMM17A"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "17"}]}, {"type": "t", "text": ", and RB1CC1."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "18"}]}, {"type": "t", "text": " Additionally, targeting components of the BCL2 family and JAK2/STAT3 signaling cascades further contributes to its ability to induce apoptosis and overcome chemoresistance."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "19", "end_ref": "27"}]}, {"type": "t", "text": " In colorectal cancer, diminished miR‐133b expression correlates with poor survival and increased metastasis, while its ectopic expression reduces cancer cell stemness and chemoresistance."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "10"}, {"type": "fg_fs", "start_ref": "28", "end_ref": "30"}, {"type": "fg_f", "ref": "13"}, {"type": "fg_f", "ref": "17"}, {"type": "fg_f", "ref": "31"}, {"type": "fg_f", "ref": "14"}, {"type": "fg_fs", "start_ref": "32", "end_ref": "36"}, {"type": "fg_f", "ref": "16"}, {"type": "fg_f", "ref": "37"}]}, {"type": "t", "text": " Curiously, contrasting roles have also been reported: in cervical carcinoma and certain contexts within the tumor microenvironment such as activated fibroblasts, miR‐133b may exhibit oncogenic behavior that promotes tumorigenesis and metastasis.\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nBeyond its tumor‐suppressive functions, miR‐133b is emerging as a valuable biomarker and regulatory molecule in cardiovascular, renal, and reproductive disorders. 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Synonyms MIR-133B, MIRNA133B, MIRN133B
NCBI Gene ID 442890
API
Download Associations
Predicted Functions View MIR133B's ARCHS4 Predicted Functions.
Co-expressed Genes View MIR133B's ARCHS4 Predicted Functions.
Expression in Tissues and Cell Lines View MIR133B's ARCHS4 Predicted Functions.

Functional Associations

MIR133B has 747 functional associations with biological entities spanning 5 categories (molecular profile, functional term, phrase or reference, disease, phenotype or trait, cell line, cell type or tissue, gene, protein or microRNA) extracted from 23 datasets.

Click the + buttons to view associations for MIR133B from the datasets below.

If available, associations are ranked by standardized value

Dataset Summary
CCLE Cell Line Gene CNV Profiles cell lines with high or low copy number of MIR133B gene relative to other cell lines from the CCLE Cell Line Gene CNV Profiles dataset.
ChEA Transcription Factor Binding Site Profiles transcription factor binding site profiles with transcription factor binding evidence at the promoter of MIR133B gene from the CHEA Transcription Factor Binding Site Profiles dataset.
ChEA Transcription Factor Targets transcription factors binding the promoter of MIR133B gene in low- or high-throughput transcription factor functional studies from the CHEA Transcription Factor Targets dataset.
COMPARTMENTS Text-mining Protein Localization Evidence Scores cellular components co-occuring with MIR133B protein in abstracts of biomedical publications from the COMPARTMENTS Text-mining Protein Localization Evidence Scores dataset.
COSMIC Cell Line Gene CNV Profiles cell lines with high or low copy number of MIR133B gene relative to other cell lines from the COSMIC Cell Line Gene CNV Profiles dataset.
CTD Gene-Disease Associations diseases associated with MIR133B gene/protein from the curated CTD Gene-Disease Associations dataset.
DISEASES Text-mining Gene-Disease Association Evidence Scores diseases co-occuring with MIR133B gene in abstracts of biomedical publications from the DISEASES Text-mining Gene-Disease Assocation Evidence Scores dataset.
ENCODE Histone Modification Site Profiles histone modification site profiles with high histone modification abundance at MIR133B gene from the ENCODE Histone Modification Site Profiles dataset.
ENCODE Transcription Factor Binding Site Profiles transcription factor binding site profiles with transcription factor binding evidence at the promoter of MIR133B gene from the ENCODE Transcription Factor Binding Site Profiles dataset.
ENCODE Transcription Factor Targets transcription factors binding the promoter of MIR133B gene in ChIP-seq datasets from the ENCODE Transcription Factor Targets dataset.
GAD Gene-Disease Associations diseases associated with MIR133B gene in GWAS and other genetic association datasets from the GAD Gene-Disease Associations dataset.
GeneRIF Biological Term Annotations biological terms co-occuring with MIR133B gene in literature-supported statements describing functions of genes from the GeneRIF Biological Term Annotations dataset.
GeneSigDB Published Gene Signatures PubMedIDs of publications reporting gene signatures containing MIR133B from the GeneSigDB Published Gene Signatures dataset.
HuGE Navigator Gene-Phenotype Associations phenotypes associated with MIR133B gene by text-mining GWAS publications from the HuGE Navigator Gene-Phenotype Associations dataset.
JASPAR Predicted Transcription Factor Targets transcription factors regulating expression of MIR133B gene predicted using known transcription factor binding site motifs from the JASPAR Predicted Transcription Factor Targets dataset.
Klijn et al., Nat. Biotechnol., 2015 Cell Line Gene CNV Profiles cell lines with high or low copy number of MIR133B gene relative to other cell lines from the Klijn et al., Nat. Biotechnol., 2015 Cell Line Gene CNV Profiles dataset.
KnockTF Gene Expression Profiles with Transcription Factor Perturbations transcription factor perturbations changing expression of MIR133B gene from the KnockTF Gene Expression Profiles with Transcription Factor Perturbations dataset.
MGI Mouse Phenotype Associations 2023 phenotypes of transgenic mice caused by MIR133B gene mutations from the MGI Mouse Phenotype Associations 2023 dataset.
MotifMap Predicted Transcription Factor Targets transcription factors regulating expression of MIR133B gene predicted using known transcription factor binding site motifs from the MotifMap Predicted Transcription Factor Targets dataset.
MPO Gene-Phenotype Associations phenotypes of transgenic mice caused by MIR133B gene mutations from the MPO Gene-Phenotype Associations dataset.
Roadmap Epigenomics Histone Modification Site Profiles histone modification site profiles with high histone modification abundance at MIR133B gene from the Roadmap Epigenomics Histone Modification Site Profiles dataset.
TISSUES Text-mining Tissue Protein Expression Evidence Scores tissues co-occuring with MIR133B protein in abstracts of biomedical publications from the TISSUES Text-mining Tissue Protein Expression Evidence Scores dataset.
WikiPathways Pathways 2014 pathways involving MIR133B protein from the Wikipathways Pathways 2014 dataset.