title: Purification, partial characterization and crystallization of acucetin, a protein containing both disintegrin-like and cysteine-rich domains released by auto-proteolysis of a P-III-type metalloproteinase AaH-IV from Agkistrodon acutus venom.
abstract: AaH-IV, a P-III-type metalloproteinase found in Agkistrodon acutus venom, readily cleaves itself to release a stable protein named acucetin at 310 K under neutral and weakly alkaline conditions. A partial amino-acid residue sequence of acucetin indicates that the protein has a high homology to snake-venom proteins containing both disintegrin-like and cysteine-rich domains. Acucetin has been crystallized in space group R32, with hexagonal unit-cell parameters a = b = 155.98, c = 76.07 A. The V(M) value of about 2.97 A(3) Da(-1) suggests the presence of only one molecule in the asymmetric unit.
authors.affiliation: Key Laboratory of Structural Biology, Chinese Academy of Sciences, 96 Jinzhai Road, Hefei, Anhui 230026, People's Republic of China.
authors.forename: Jianye
authors.initials: J
authors.lastname: Zang
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Zhu
authors.forename: Yang
authors.initials: Y
authors.lastname: Yu
authors.forename: Maikun
authors.initials: M
authors.lastname: Teng
authors.forename: Liwen
authors.initials: L
authors.lastname: Niu
authors.forename: Qingqiu
authors.initials: Q
authors.lastname: Huang
authors.forename: Qun
authors.initials: Q
authors.lastname: Liu
authors.forename: Quan
authors.initials: Q
authors.lastname: Hao
mesh_terms: D017836:Agkistrodon; D000595:Amino Acid Sequence; D000818:Animals; D003435:Crotalid Venoms / Q000737:chemistry* / Q000201:enzymology; D003460:Crystallization; D018360:Crystallography, X-Ray; D003545:Cysteine / Q000737:chemistry / Q000235:genetics; D019483:Disintegrins / Q000737:chemistry / Q000235:genetics; D008666:Metalloendopeptidases / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D008969:Molecular Sequence Data; D017434:Protein Structure, Tertiary; D020539:Sequence Analysis, Protein
chemical_list: D003435:Crotalid Venoms; D019483:Disintegrins; D008666:Metalloendopeptidases; D003545:Cysteine