6nil

cryoEM structure of the truncated HIV-1 Vif/CBFbeta/A3F complexcryoEM structure of the truncated HIV-1 Vif/CBFbeta/A3F complex

6nil, resolution 3.90Å Show:Asymmetric Unit Biological Assembly Structural highlights 6nil is a 12 chain structure with sequence from Homo sapiens and Human immunodeficiency virus 1. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 3.9Å Ligands: Experimental data: Check Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function VIF_HV1N5 Counteracts the innate antiviral activity of human APOBEC3F and APOBEC3G. Forms a complex with host APOBEC3F and APOBEC3G thus preventing the entry of these lethally hypermutating enzymes into progeny virions. Recruits an active E3 ubiquitin ligase complex composed of elongin BC, CUL5, and RBX2 to induce polyubiquitination of APOBEC3G and APOBEC3F. In turn, they are directed to the 26S proteasome for degradation. Vif interaction with APOBEC3G also blocks its cytidine deaminase activity in a proteasome-independent manner, suggesting a dual inhibitory mechanism. May interact directly with APOBEC3G mRNA in order to inhibit its translation. Seems to play a role in viral morphology by affecting the stability of the viral nucleoprotein core. Finally, Vif also contributes to the G2 cell cycle arrest observed in HIV infected cells (By similarity). See Also Core-binding factor Virion infectivity factor