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@ARTICLE{Vasudevan:830254,
author = {Vasudevan, Ananda Ayyappan Jaguva and Hofmann, Henning and
Willbold, Dieter and Häussinger, Dieter and König, Bernd
and Münk, Carsten},
title = {{E}nhancing the {C}atalytic {D}eamination {A}ctivity of
{APOBEC}3{C} {I}s {I}nsufficient to {I}nhibit
{V}if-{D}eficient {HIV}-1},
journal = {Journal of molecular biology},
volume = {429},
number = {8},
issn = {0022-2836},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2017-03827},
pages = {1171–1191},
year = {2017},
abstract = {The retroviral restriction factors of the APOBEC3 (A3)
cytidine deaminase family catalyze the deamination of
cytidines in single-stranded viral DNA. APOBEC3C (A3C) is a
strong antiviral factor against viral infectivity factor
(vif)-deficient simian immunodeficiency virus Δvif, which
is, however, a weak inhibitor against human immunodeficiency
virus (HIV)-1 for reasons unknown. The precise link between
the antiretroviral effect of A3C and its catalytic activity
is incompletely understood. Here, we show that the S61P
mutation in human A3C (A3C.S61P) boosted hypermutation in
the viral genomes of simian immunodeficiency virus Δvif and
murine leukemia virus but not in human immunodeficiency
virus HIV-1Δvif. The enhanced antiviral activity of
A3C.S61P correlated with enhanced in vitro cytidine
deamination. Furthermore, the S61P mutation did not change
the substrate specificity of A3C, ribonucleoprotein complex
formation, self-association, Zinc coordination, or viral
incorporation features. We propose that local structural
changes induced by the serine-to-proline substitution are
responsible for the gain of catalytic activity of A3C.S61P.
Our results are a first step toward an understanding of
A3C's DNA binding capacity, deamination-dependent editing,
and antiviral functions at the molecular level. We conclude
that the enhanced enzymatic activity of A3C is insufficient
to restrict HIV-1, indicating an unknown escape mechanism of
HIV-1.},
cin = {ICS-6},
ddc = {570},
cid = {I:(DE-Juel1)ICS-6-20110106},
pnm = {553 - Physical Basis of Diseases (POF3-553)},
pid = {G:(DE-HGF)POF3-553},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000400720100006},
pubmed = {pmid:28315663},
doi = {10.1016/j.jmb.2017.03.015},
url = {https://juser.fz-juelich.de/record/830254},
}