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Acts as co-chaperone for HSP90. Prevents the stimulation of HSP90AB1 ATPase activity by AHSA1. Positive factor in promoting PGR function in the cell. May be necessary for proper folding of myosin (Potential). Necessary for normal cell proliferation. Necessary for normal myotube formation and myosin accumulation during muscle cell development. May play a role in erythropoiesis in stroma cells in the spleen.
Gene References into Functions
Whole-exome sequencing of all affected individuals and their parents identified biallelic mutations in Unc-45 Myosin Chaperone A (UNC45A) as a likely driver for cholestasis, congenital diarrhea, impaired hearing, and bone fragility. PMID: 29429573
UNC-45a promotes generation of contractile actomyosin bundles through synchronized non-muscle myosin II folding and filament-assembly activities. PMID: 29055011
Results provide novel insights into the molecular mechanisms of neurite growth and define UNC-45A as a novel and master regulator of NMII-mediated cellular processes in neurons. PMID: 28356421
UNC-45A is a crucial component in regulating human NK cell cytoskeletal dynamics via promoting the formation of actomyosin complexes. PMID: 26438524
Findings identify a novel centrosomal function for UNC45A and its role in cell proliferation and tumorigenesis. PMID: 25444911
The authors found that UNC-45A is alternatively expressed at the mRNA and protein levels as two isoforms and that the two isoforms differ only by a proline-rich 15-amino-acid sequence near the amino-terminus. PMID: 21802425
GCUNC-45 is a novel modulator of progesterone receptor chaperoning by hsp90. PMID: 16478993
elevated GC UNC-45 protein expression in ovarian carcinoma proliferation and metastasis. PMID: 17872978
GCUNC45 is required for the normal cellular distribution of Hsp90beta, but not Hsp90alpha. PMID: 18285346
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Subcellular Location
Cytoplasm. Cytoplasm, perinuclear region. Nucleus. Note=Predominant in the perinuclear region. Little protein in the nucleus.
Tissue Specificity
Detected in peripheral blood leukocytes, bone marrow, adrenal gland, trachea, spinal cord, thyroid, lymph node and stomach.