Skeletal muscle-specific variant of nascent polypeptide associated complex alpha (skNAC): Implications for a specific role in mammalian myoblast differentiation

[摘要]：NAC (nascent polypeptide associated complex) is a heterodimer consisting of an alpha and a beta subunit. skNAC (skeletal and heart muscle-specific form of alpha NAC) is a variant of aNAC, which is induced in muscle differentiation and regeneration. We show here that skNAC expression is regulated by p38 MAPK, which plays a crucial role in myogenesis. Furthermore, inhibition of skNAC expression in myoblasts via specific siRNAs might lead to disturbed incorporation of myosin heavy chain (MyHC) into sarcomeres, however, it has no inhibitory effect on absolute MyHC protein levels. Taken together, our data suggest that skNAC regulates specific aspects of myogenesis. (C) 2011 Elsevier GmbH. All rights reserved.

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