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    BMI1

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    For Research Use Only. Not For Clinical Use.


    This gene encodes a ring finger protein that is major component of the polycomb group complex 1 (PRC1). This complex functions through chromatin remodeling as an essential epigenetic repressor of multiple regulatory genes involved in embryonic development and self-renewal in somatic stem cells. This protein also plays a central role in DNA damage repair. This gene is an oncogene and aberrant expression is associated with numerous cancers and is associated with resistance to certain chemotherapies. A pseudogene of this gene is found on chromosome X. Read-through transcription also exists between this gene and the upstream COMM domain containing 3 (COMMD3) gene. [provided by RefSeq, Sep 2015]
    Protein class

    Cancer-related genes, Human disease related genes

    Predicted location

    Intracellular

    Single cell type specificity

    Cell type enhanced (Late spermatids, Early spermatids)

    Immune cell specificity

    Low immune cell specificity

    Cell line specificity

    Cell line enhanced (HDLM-2, U-937)

    Interaction

    Component of a PRC1-like complex (PubMed:12167701, PubMed:15386022, PubMed:19636380, PubMed:21282530, PubMed:26151332, PubMed:21772249, PubMed:25355358). Identified in a PRC1-like HPRC-H complex with CBX2, CBX4, CBX8, PHC1, PHC2, PHC3 RING1 and RNF2 (PubMed:12167701). Interacts with RNF2/RING2 (PubMed:16714294, PubMed:21772249, PubMed:25355358). Interacts with RING1 (By similarity). Part of a complex that contains RNF2, UB2D3 and BMI1, where RNF2 and BMI1 form a tight heterodimer, and UB2D3 interacts only with RNF2 (PubMed:21772249, PubMed:25355358). The complex composed of RNF2, UB2D3 and BMI1 binds nucleosomes, and has activity only with nucleosomal histone H2A (PubMed:21772249, PubMed:25355358). Interacts with CBX7 and CBX8 (PubMed:19636380). Interacts with SPOP (PubMed:15897469). Part of a complex consisting of BMI1, CUL3 and SPOP (PubMed:15897469). Interacts with E4F1 (PubMed:16882984). Interacts with PHC2 (PubMed:9121482, PubMed:9199346, PubMed:27827373). Interacts with zinc finger protein ZNF277 (By similarity). May be part of a complex including at least ZNF277, BMI1 and RNF2/RING2 (By similarity).

    Molecular function

    Chromatin regulator, Repressor

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