InnateDB Protein
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IDBP-198428.6
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Last Modified
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2014-10-13 [Report errors or provide feedback]
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Gene Symbol
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Chmp1a
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Protein Name
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charged multivesicular body protein 1A
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Synonyms
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Species
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Mus musculus
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Ensembl Protein
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ENSMUSP00000000759
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InnateDB Gene
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IDBG-198426 (Chmp1a)
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Protein Structure
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Function |
Probable peripherally associated component of the endosomal sorting required for transport complex III (ESCRT-III) which is involved in multivesicular bodies (MVBs) formation and sorting of endosomal cargo proteins into MVBs. MVBs contain intraluminal vesicles (ILVs) that are generated by invagination and scission from the limiting membrane of the endosome and mostly are delivered to lysosomes enabling degradation of membrane proteins, such as stimulated growth factor receptors, lysosomal enzymes and lipids. The MVB pathway appears to require the sequential function of ESCRT-O, -I,-II and -III complexes. ESCRT- III proteins mostly dissociate from the invaginating membrane before the ILV is released. The ESCRT machinery also functions in topologically equivalent membrane fission events, such as the terminal stages of cytokinesis. ESCRT-III proteins are believed to mediate the necessary vesicle extrusion and/or membrane fission activities, possibly in conjunction with the AAA ATPase VPS4. Involved in cytokinesis. Involved in recruiting VPS4A and/or VPS4B to the midbody of dividing cells. May also be involved in chromosome condensation. Targets the Polycomb group (PcG) protein BMI1/PCGF4 to regions of condensed chromatin. May play a role in stable cell cycle progression and in PcG gene silencing (By similarity). {ECO:0000250}.
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Subcellular Localization |
Cytoplasm {ECO:0000269PubMed:11559747}. Endosome membrane {ECO:0000269PubMed:11559747}; Peripheral membrane protein {ECO:0000269PubMed:11559747}. Nucleus matrix {ECO:0000269PubMed:11559747}. Note=The cytoplasmic form is partially membrane-associated and localizes to early endosomes. The nuclear form remains associated with the chromosome scaffold during mitosis. On overexpression, it localizes to nuclear bodies characterized by nuclease-resistant condensed chromatin.
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Disease Associations |
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Tissue Specificity |
Highly expressed in adult heart, kidney and liver. Expressed at lower levels in adult colon, spleen, lung, brain, testis and muscle. Also expressed in myoblasts and embryo fibroblasts. {ECO:0000269PubMed:11559747}.
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Comments |
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Number of Interactions
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This gene and/or its encoded proteins are associated with 1 experimentally validated interaction(s) in this database.
Experimentally validated |
Total |
1
[view]
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Protein-Protein |
1
[view]
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Protein-DNA |
0
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Protein-RNA |
0
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DNA-DNA |
0
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RNA-RNA |
0
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DNA-RNA |
0
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Molecular Function |
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Biological Process |
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Cellular Component |
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PDB ID |
MGI:1920159
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InterPro |
IPR005024
Snf7
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PFAM |
PF03357
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PRINTS |
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PIRSF |
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SMART |
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TIGRFAMs |
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Modification |
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SwissProt |
Q921W0
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PhosphoSite |
PhosphoSite-Q921W0
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TrEMBL |
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UniProt Splice Variant |
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Entrez Gene |
234852
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UniGene |
Mm.470905
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RefSeq |
NP_663581
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MGI ID |
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MGI Symbol |
Chmp1a
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OMIM |
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CCDS |
CCDS40509
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HPRD |
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IMGT |
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EMBL |
AK046416
AK159830
BC010524
BC023807
BC036138
BC036152
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GenPept |
AAH10524
AAH23807
AAH36138
AAH36152
BAC32719
BAE35409
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