title: Human immunodeficiency virus type 1 replication and regulation of APOBEC3G by peptidyl prolyl isomerase Pin1.
abstract: APOBEC3G (A3G) is a cytidine deaminase that restricts human immunodeficiency virus type 1 (HIV-1) replication. HIV-1 synthesizes a viral infectivity factor (Vif) to counter A3G restriction. Currently, it is poorly understood how A3G expression/activity is regulated by cellular factors. Here, we show that the prolyl isomerase Pin1 protein modulates A3G expression. Pin1 was found to be an A3G-interacting protein that reduces A3G expression and its incorporation into HIV-1 virion, thereby limiting A3G-mediated restriction of HIV-1. Intriguingly, HIV-1 infection modulates the phosphorylation state of Pin1, enhancing its ability to moderate A3G activity. These new findings suggest a potential Vif-independent way for HIV-1 to moderate the cellular action of A3G.
authors.affiliation: Molecular Virology Section, Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA.
authors.forename: Koichi
authors.initials: K
authors.lastname: Watashi
authors.forename: Mohammad
authors.initials: M
authors.lastname: Khan
authors.forename: Venkat R K
authors.initials: VR
authors.lastname: Yedavalli
authors.forename: Man Lung
authors.initials: ML
authors.lastname: Yeung
authors.forename: Klaus
authors.initials: K
authors.lastname: Strebel
authors.forename: Kuan-Teh
authors.initials: KT
authors.lastname: Jeang
mesh_terms: D000071480:APOBEC-3G Deaminase; D000818:Animals; D002460:Cell Line; D003564:Cytidine Deaminase / Q000235:genetics / Q000378:metabolism*; D015658:HIV Infections / Q000378:metabolism*; D015497:HIV-1 / Q000378:metabolism*; D006801:Humans; D000072340:NIMA-Interacting Peptidylprolyl Isomerase; D019696:Peptidylprolyl Isomerase / Q000235:genetics / Q000378:metabolism*; D025941:Protein Interaction Mapping; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D014771:Virion / Q000378:metabolism; D014779:Virus Replication
chemical_list: D000072340:NIMA-Interacting Peptidylprolyl Isomerase; D011993:Recombinant Fusion Proteins; D000071480:APOBEC-3G Deaminase; C464924:APOBEC3G protein, human; D003564:Cytidine Deaminase; C000606846:PIN1 protein, human; D019696:Peptidylprolyl Isomerase