5k81

Crystal Structure of a Primate APOBEC3G N-Terminal Domain

spinqualitylabelsall models 5k81, resolution 2.01Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5k81 is a 6 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ZN Related: 5k82, 5k83 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed APOBEC3G (A3G) is a potent restriction factor of HIV-1. The N-terminal domain of A3G (A3G-CD1) is responsible for oligomerization and nucleic acid binding, both of which are essential for anti-HIV activity. As a countermeasure, HIV-1 viral infectivity factor (Vif) binds A3G-CD1 to mediate A3G degradation. The structural basis for the functions of A3G-CD1 remains elusive. Here, we report the crystal structures of a primate A3G-CD1 (rA3G-CD1) alone and in complex with single-stranded DNA (ssDNA). rA3G-CD1 shares a conserved core structure with the previously determined catalytic APOBECs, but displays unique features for surface charge, dimerization and nucleic acid binding. Its co-crystal structure with ssDNA reveals how the conformations of loops and residues surrounding the Zn-coordinated centre (Zn-centre) change upon DNA binding. The dimerization interface of rA3G-CD1 is important for oligomerization, nucleic acid binding and Vif-mediated degradation. These findings elucidate the molecular basis of antiviral mechanism and HIV-Vif targeting of A3G. Crystal structures of APOBEC3G N-domain alone and its complex with DNA.,Xiao X, Li SX, Yang H, Chen XS Nat Commun. 2016 Aug 2;7:12193. doi: 10.1038/ncomms12193. PMID:27480941 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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