Synonyms:FLJ10043, GC UNC45, GCUNC 45, GCUNC45, IRO039700, Protein unc 45 homolog A, SMAP 1, SMAP1, unc 45 homolog A(C. elegans), Unc 45A, UNC45A Background: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(By similarity).