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Proteasomal ATPase-associated factor 1

Definition:

Inhibits proteasome 26S assembly and proteolytic activity by impairing the association of the 19S regulatory complex with the 20S core. In case of HIV-1 infection, recruited by viral Tat to the HIV-1 promoter, where it promotes the recruitment of 19S regulatory complex through dissociation of the proteasome 26S. This presumably promotes provirus transcription efficiency. Protects SUPT6H from proteasomal degradation.

Verweise:

[1]. Mirai Nakamura, et al. Spt6 levels are modulated by PAAF1 and proteasome to regulate the HIV-1 LTR. Retrovirology. 2012 Feb 8;9:13. [Content Brief]

[2]. Irina Lassot, et al. The proteasome regulates HIV-1 transcription by both proteolytic and nonproteolytic mechanisms. Mol Cell. 2007 Feb 9;25(3):369-83. [Content Brief]

[3]. Yoon Park, et al. Proteasomal ATPase-associated factor 1 negatively regulates proteasome activity by interacting with proteasomal ATPases. Mol Cell Biol. 2005 May;25(9):3842-53. [Content Brief]

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