1MC2

monomeric LYS-49 phospholipase A2 homologue purified from AG

Summary for 1MC2

• Entry DOI: 10.2210/pdb1mc2/pdb
• Descriptor: Acutohaemonlysin, ISOPROPYL ALCOHOL (3 entities in total)
• Functional Keywords: ys49-phospholipase a2, snake venom, agkistrodon acutus, toxin
• Biological source: Deinagkistrodon acutus (Chinese moccasin)
• Cellular location: Secreted: O57385
• Total number of polymer chains: 1
• Total formula weight: 14213.57

Authors

Liu, Q.,Huang, Q.Q.,Zhang, R.G.,Weeks, C.M.,Jelsch, C.,Teng, M.K.,Niu, L.W. (deposition date: 2002-08-05, release date: 2002-08-21, Last modification date: 2024-10-09)

Primary citation

Liu, Q.,Huang, Q.Q.,Teng, M.K.,Weeks, C.M.,Jelsch, C.,Zhang, R.G.,Niu, L.W.
The crystal structure of a novel, inactive, lysine 49 PLA2 from Agkistrodon acutus venom: an ultrahigh resolution, AB initio structure determination
J.Biol.Chem., 278:41400-41408, 2003

PubMed Abstract: The crystal structure of acutohaemolysin, a lysine 49 phospholipase A2 protein with 1010 non-hydrogen protein atoms and 232 water molecules, has been determined ab initio using the program SnB at an ultrahigh resolution of 0.8 A. The lack of catalytic activity appears to be related to the presence of Phe102, which prevents the access of substrate to the active site. The substitution of tryptophan for leucine at residue 10 interferes with dimer formation and may be responsible for the additional loss of hemolytic activity. The ultrahigh resolution of the experimental diffraction data permits alternative conformations to be modeled for disordered residues, many hydrogen atoms to be located, the protonation of the Nepsilon2 atom in the catalytic residue His48 to be observed experimentally, and the density of the bonding electrons to be analyzed in detail.

PubMed: 12871974
DOI: 10.1074/jbc.M305210200

Experimental method

X-RAY DIFFRACTION (0.85 Å)