Dual Role of HIV-1 Envelope Signal Peptide in Immune Evasion.
Dual Role of HIV-1 Envelope Signal Peptide in Immune Evasion.
复制标题
DOI:
10.3390/v14040808
复制
发表时间:
2022-04-13
期刊:
影响因子:
--
通讯作者:
中科院分区:
文献类型:
--
作者:
HIV-1 Env signal peptide (SP) is an important contributor to Env functions. Env is generated from Vpu/Env encoded bicistronic mRNA such that the 5′ end of Env-N-terminus, that encodes for Env-SP overlaps with 3′ end of Vpu. Env SP displays high sequence diversity, which translates into high variability in Vpu sequence. This study aimed to understand the effect of sequence polymorphism in the Vpu-Env overlapping region (VEOR) on the functions of two vital viral proteins: Vpu and Env. We used infectious molecular clone pNL4.3-CMU06 and swapped its SP (or VEOR) with that from other HIV-1 isolates. Swapping VEOR did not affect virus production in the absence of tetherin however, presence of tetherin significantly altered the release of virus progeny. VEOR also altered Vpu’s ability to downregulate CD4 and tetherin. We next tested the effect of these swaps on Env functions. Analyzing the binding of monoclonal antibodies to membrane embedded Env revealed changes in the antigenic landscape of swapped Envs. These swaps affected the oligosaccharide composition of Env-N-glycans as shown by changes in DC-SIGN-mediated virus transmission. Our study suggests that genetic diversity in VEOR plays an important role in the differential pathogenesis and also assist in immune evasion by altering Env epitope exposure.
登录
查看更多内容
DOI:
10.1111/j.1432-1033.1990.tb19409.x
发表时间:
1990-11-13
期刊:
EUROPEAN JOURNAL OF BIOCHEMISTRY
影响因子:
--
作者:
GEYER, H;KEMPF, R;GEYER, R
通讯作者:
GEYER, R
影响因子:
3.7
作者:
Asmal M;Hellmann I;Liu W;Keele BF;Perelson AS;Bhattacharya T;Gnanakaran S;Daniels M;Haynes BF;Korber BT;Hahn BH;Shaw GM;Letvin NL
通讯作者:
Letvin NL
影响因子:
4.4
作者:
Go EP;Liao HX;Alam SM;Hua D;Haynes BF;Desaire H
通讯作者:
Desaire H
影响因子:
82.9
作者:
Bunnik, Evelien M.;Euler, Zelda;Schuitemaker, Hanneke
通讯作者:
Schuitemaker, Hanneke
影响因子:
64.8
作者:
COHEN, EA;TERWILLIGER, EF;HASELTINE, WA
通讯作者:
HASELTINE, WA