Roles of ANP32 proteins in cell biology and viral replication

Abstract

The acidic leucine-rich nuclear phosphoprotein 32 kDa (ANP32) family consists of evolutionarily conserved proteins of 220–291 amino acids characterized by an N-terminal leucine-rich repeat domain (LRR) and a C-terminal low-complexity acidic region (LCAR). ANP32 family proteins regulate a variety of physiological functions, including chromatin remodeling, apoptosis and nervous system development. Abnormal ANP32 expression is closely related to tumorigenesis. In recent years, the role of ANP32 family proteins in viral infections has received considerable attention due to their activity supporting influenza virus replication and restriction of virus cross-species transmission. Moreover, ANP32 proteins are closely related to the replication of HIV and nonsegmented negative-strand RNA viruses (NNSVs). In this review, the general physiological functions of ANP32 family proteins, as well as their roles in virus replication, are summarized in detail.