2pqf

Human Poly(ADP-Ribose) Polymerase 12, Catalytic fragment in complex with an inhibitor 3-Aminobenzoic acid

spinqualitylabelsall models 2pqf, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2pqf is a 6 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CIT, GAB NonStd Res: MSE Gene: PARP12, ZC3HDC1 (HUMAN) Activity: NAD(+) ADP-ribosyltransferase, with EC number 2.4.2.30 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The mammalian poly(ADP-ribose) polymerase (PARP) family are ADP-ribosyltransferases with diphtheria toxin homology (ARTD). Most members have mono-ADP-ribosyltransferase activity. PARP13/ARTD13, also called zinc finger antiviral protein (ZAP), has roles in viral immunity and microRNA mediated stress responses. PARP13 features a divergent PARP homology domain missing a PARP consensus sequence motif; the domain has enigmatic functions and apparently lacks catalytic activity. We used X-ray crystallography, molecular dynamics simulations and biochemical analyses to investigate the structural requirements for ADP-ribosyltransferase activity in human PARP13 and two of its functional partners in stress granules, PARP12/ARTD12, and PARP15/ BAL3/ARTD7. The crystal structure of the PARP homology domain of PARP13 shows obstruction of the canonical active site, precluding NAD+ binding. Molecular dynamics simulations indicate that this closed cleft conformation is maintained in solution. Introducing consensus side chains in PARP13 did not result in 3-aminobenzamide binding, but in further closure of the site. Three-dimensional alignment of the PARP homology domains of PARP13, PARP12, and PARP15 illustrates placement of PARP13 residues that deviate from the PARP family consensus. Introducing either one of two of these side chains into the corresponding positions in PARP15 abolished PARP15 ADP-ribosyltransferase activity. Taken together, our results show that PARP13 lacks the structural requirements for ADP-ribosyltransferase activity. Structural Basis for Lack of ADP-Ribosyltransferase Activity in Poly(ADP-Ribose) Polymerase-13/Zinc Finger Antiviral Protein.,Karlberg T, Klepsch M, Thorsell AG, Andersson CD, Linusson A, Schuler H J Biol Chem. 2015 Jan 29. pii: jbc.M114.630160. PMID:25635049 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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