The Antiviral and Cancer Genomic DNA Deaminase APOBEC3H Is Regulated by an RNA-Mediated Dimerization Mechanism.
The Antiviral and Cancer Genomic DNA Deaminase APOBEC3H Is Regulated by an RNA-Mediated Dimerization Mechanism.
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DOI:
10.1016/j.molcel.2017.12.010
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发表时间:
2018-01-04
期刊:
影响因子:
16
通讯作者:
Harris RS
中科院分区:
文献类型:
--
作者:
Shaban NM;Shi K;Lauer KV;Carpenter MA;Richards CM;Salamango D;Wang J;Lopresti MW;Banerjee S;Levin-Klein R;Brown WL;Aihara H;Harris RS
Human APOBEC3H and homologous single-stranded DNA cytosine deaminases are unique to mammals. These DNA editing enzymes function in innate immunity by restricting the replication of viruses and transposons. APOBEC3H also contributes to cancer mutagenesis. Here we address the fundamental nature of RNA in regulating human APOBEC3H activities. APOBEC3H co-purifies with RNA as an inactive protein, and RNase A treatment enables strong DNA deaminase activity. RNA binding-defective mutants demonstrate clear separation-of-function by becoming DNA hypermutators. Biochemical and crystallographic data demonstrate a mechanism in which double-stranded RNA mediates enzyme dimerization. Additionally, APOBEC3H separation-of-function mutants show that RNA binding is required for cytoplasmic localization, packaging into HIV-1 particles, and antiviral activity. Overall, these results support a model in which structured RNA negatively regulates the potentially harmful DNA deamination activity of APOBEC3H, while at the same time positively regulating its antiviral activity.
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影响因子:
16
作者:
Harris, RS;Petersen-Mahrt, SK;Neuberger, MS
通讯作者:
Neuberger, MS
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH
影响因子:
3.7
作者:
Browne, Edward P.;Allers, Carolina;Landau, Nathaniel R.
通讯作者:
Landau, Nathaniel R.
影响因子:
5.4
作者:
Albin, John S.;Hache, Guylaine;Harris, Reuben S.
通讯作者:
Harris, Reuben S.
影响因子:
5.4
作者:
Gallois-Montbrun, Sarah;Holmes, Rebecca K.;Malim, Michael H.
通讯作者:
Malim, Michael H.