Structural basis of HIV-1 resistance to AZT by excision.
Structural basis of HIV-1 resistance to AZT by excision.
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DOI:
10.1038/nsmb.1908
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发表时间:
2010-10
影响因子:
16.8
通讯作者:
中科院分区:
文献类型:
--
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Human immunodeficiency virus (HIV-1) develops resistance to 3′-azido-2′,3′-deoxythymidine (AZT, zidovudine) by acquiring mutations in reverse transcriptase that enhance the ATP-mediated excision of AZT monophosphate from the 3′ end of the primer. The excision reaction occurs at the dNTP-binding site, uses ATP as a pyrophosphate donor, unblocks the primer terminus and allows reverse transcriptase to continue viral DNA synthesis. The excision product is AZT adenosine dinucleoside tetraphosphate (AZTppppA). We determined five crystal structures: wild-type reverse transcriptase–double-stranded DNA (RT–dsDNA)–AZTppppA; AZT-resistant (AZTr; M41L D67N K70R T215Y K219Q) RT–dsDNA–AZTppppA; AZTr RT–dsDNA terminated with AZT at dNTP- and primer-binding sites; and AZTr apo reverse transcriptase. The AMP part of AZTppppA bound differently to wild-type and AZTr reverse transcriptases, whereas the AZT triphosphate part bound the two enzymes similarly. Thus, the resistance mutations create a high-affinity ATP-binding site. The structure of the site provides an opportunity to design inhibitors of AZT-monophosphate excision.
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DOI:
10.1073/pnas.90.13.6320
发表时间:
1993-07-01
影响因子:
11.1
作者:
JACOBOMOLINA, A;DING, JP;ARNOLD, E
通讯作者:
ARNOLD, E
影响因子:
2.9
作者:
CARROLL, SS;GEIB, J;KUO, LC
通讯作者:
KUO, LC
影响因子:
5.4
作者:
Hooker, DJ;Tachedjian, G;Deacon, NJ
通讯作者:
Deacon, NJ
影响因子:
5.4
作者:
Boyer, PL;Sarafianos, SG;Hughes, SH
通讯作者:
Hughes, SH
影响因子:
2.9
作者:
Arion, D;Kaushik, N;Parniak, MA
通讯作者:
Parniak, MA