Twin gradients in APOBEC3 edited HIV-1 DNA reflect the dynamics of lentiviral replication.
Twin gradients in APOBEC3 edited HIV-1 DNA reflect the dynamics of lentiviral replication.
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DOI:
10.1093/nar/gkl555
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发表时间:
2006
影响因子:
14.9
通讯作者:
Wain-Hobson S
中科院分区:
文献类型:
--
作者:
Suspène R;Rusniok C;Vartanian JP;Wain-Hobson S
The human immunodeficiency virus (HIV) Vif protein blocks incorporation of two host cell cytidine deaminases, APOBEC3F and 3G, into the budding virion. Not surprisingly, on a vif background nascent minus strand DNA can be extensively edited leaving multiple uracil residues. Editing occurs preferentially in the context of TC (GA on the plus strand) and CC (GG) depending on the enzyme. To explore the distribution of APOBEC3F and –3G editing across the genome, a product/substrate ratio (AA + AG)/(GA + GG) was computed for a series of 30 edited genomes present in the data bases. Two highly polarized gradients were noted each with maxima just 5′ to the central polypurine tract (cPPT) and LTR proximal polypurine tract (3′PPT). The gradients are in remarkable agreement with the time the minus strand DNA remains single stranded. In vitro analyses of APOBEC3G deamination of nascent cDNA spanning the two PPTs showed no pronounced dependence on the PPT RNA:DNA heteroduplex ruling out the competing hypothesis of a PPT orientation effect. The degree of hypermutation varied smoothly among genomes indicating that the number of APOBEC3 molecules packaged varied considerably.
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DOI:
10.1084/jem.20051512
发表时间:
2006-01-23
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Peng G;Lei KJ;Jin W;Greenwell-Wild T;Wahl SM
通讯作者:
Wahl SM
影响因子:
14.9
作者:
Langlois MA;Beale RC;Conticello SG;Neuberger MS
通讯作者:
Neuberger MS
影响因子:
4.8
作者:
Klarmann, GJ;Chen, X;Preston, BD
通讯作者:
Preston, BD
影响因子:
3.7
作者:
WAINHOBSON, S;SONIGO, P;HENRY, M
通讯作者:
HENRY, M
影响因子:
64.5
作者:
Harris, RS;Bishop, KN;Malim, MH
通讯作者:
Malim, MH