4av1 | pdb_00004av1

Crystal structure of the human PARP-1 DNA binding domain in complex with DNA

spinqualitylabelsall models 4av1, resolution 3.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4av1 is a 6 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ZN Related: 1uk0, 1uk1, 1wok, 2cok, 2cr9, 2cs2 Activity: NAD(+) ADP-ribosyltransferase, with EC number 2.4.2.30 Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed Poly(ADP-ribose) polymerase 1 (PARP1) is a primary DNA damage sensor whose (ADP-ribose) polymerase activity is acutely regulated by interaction with DNA breaks. Upon activation at sites of DNA damage, PARP1 modifies itself and other proteins by covalent addition of long, branched polymers of ADP-ribose, which in turn recruit downstream DNA repair and chromatin remodeling factors. PARP1 recognizes DNA damage through its N-terminal DNA-binding domain (DBD), which consists of a tandem repeat of an unusual zinc-finger (ZnF) domain. We have determined the crystal structure of the human PARP1-DBD bound to a DNA break. Along with functional analysis of PARP1 recruitment to sites of DNA damage in vivo, the structure reveals a dimeric assembly whereby ZnF1 and ZnF2 domains from separate PARP1 molecules form a strand-break recognition module that helps activate PARP1 by facilitating its dimerization and consequent trans-automodification. The zinc-finger domains of PARP1 cooperate to recognize DNA strand breaks.,Ali AA, Timinszky G, Arribas-Bosacoma R, Kozlowski M, Hassa PO, Hassler M, Ladurner AG, Pearl LH, Oliver AW Nat Struct Mol Biol. 2012 Jun 10;19(7):685-92. doi: 10.1038/nsmb.2335. PMID:22683995 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Poly (ADP-ribose) polymerase

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