Nef-induced major histocompatibility complex class I down-regulation is functionally dissociated from its virion incorporation, enhancement of viral infectivity, and CD4 down-regulation.

Abstract:

:The N-terminal alpha-helix domain of the human immunodeficiency virus type 1 (HIV-1) Nef protein plays important roles in enhancement of viral infectivity, virion incorporation of Nef, and the down-regulation of major histocompatibility complex class I (MHC-I) expression on cell surfaces. In this study, we demonstrated that Met 20 in the alpha-helix domain was indispensable for the ability of Nef to modulate MHC-I expression but not for other events. We also showed that Met 20 was unnecessary for the down-regulation of CD4. These findings indicate that the region governing MHC-I down-regulation is proximate in the alpha-helix domain but is dissociated functionally from that determining enhancement of viral infectivity, virion incorporation of Nef, and CD4 down-regulation.

journal_name

J Virol

journal_title

Journal of virology

authors

Akari H,Arold S,Fukumori T,Okazaki T,Strebel K,Adachi A

doi

10.1128/jvi.74.6.2907-2912.2000

subject

Has Abstract

pub_date

2000-03-01 00:00:00

pages

2907-12

issue

6

eissn

0022-538X

issn

1098-5514

journal_volume

74

pub_type

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