NMR structure of human restriction factor APOBEC3A reveals substrate binding and enzyme specificity.
NMR structure of human restriction factor APOBEC3A reveals substrate binding and enzyme specificity.
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DOI:
10.1038/ncomms2883
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发表时间:
2013
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Human APOBEC3A (A3A) is a single-stranded DNA (ssDNA) cytidine deaminase that restricts viral pathogens and endogenous retrotransposons and plays a role in the innate immune response. Furthermore, its potential to act as a genomic DNA mutator has implications for a role in carcinogenesis. A deeper understanding of A3A’s deaminase and nucleic acid binding properties, which is central to its biological activities, has been limited by the lack of structural information. Here, we report the NMR solution structure of A3A and show that the critical interface for interaction with ssDNA substrates includes residues extending beyond the catalytic center. Importantly, by monitoring deaminase activity in real time, we find that A3A displays similar catalytic activity on A3A-specific TTCA- or A3G-specific CCCA-containing substrates, involving key determinants immediately 5′ of the reactive C. Our results afford novel mechanistic insights into A3A-mediated deamination and provide the structural basis for further molecular studies.
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影响因子:
4.8
作者:
Aguiar, Renato S.;Lovsin, Nika;Peterlin, B. Matija
通讯作者:
Peterlin, B. Matija
影响因子:
64.8
作者:
Holden, Lauren G.;Prochnow, Courtney;Chang, Y. Paul;Bransteitter, Ronda;Chelico, Linda;Sen, Udayaditya;Stevens, Raymond C.;Goodman, Myron F.;Chen, Xiaojiang S.
通讯作者:
Chen, Xiaojiang S.
影响因子:
17.3
作者:
Clore, GM;Gronenborn, AM
通讯作者:
Gronenborn, AM
DOI:
10.1107/s0907444998003254
发表时间:
1998-09-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子:
--
作者:
Brunger, AT;Adams, PD;Warren, GL
通讯作者:
Warren, GL
影响因子:
5.4
作者:
Iwatani, Yasumasa;Takeuchi, Hiroaki;Levin, Judith G.
通讯作者:
Levin, Judith G.