3nji

Publication Abstract from PubMed

The crystal structure of SO1698 protein from Shewanella oneidensis was determined by a SAD method and refined to 1.57 A. The structure is a beta sandwich that unexpectedly consists of two polypeptides; the N-terminal fragment includes residues 1-116, and the C-terminal one includes residues 117-125. Electron density also displayed the Lys-98 side chain covalently linked to Asp-116. The putative active site residues involved in self-cleavage were identified; point mutants were produced and characterized structurally and in a biochemical assay. Numerical simulations utilizing molecular dynamics and hybrid quantum/classical calculations suggest a mechanism involving activation of a water molecule coordinated by a catalytic aspartic acid.

Characterization of member of DUF1888 protein family, self-cleaving and self-assembling endopeptidase.,Osipiuk J, Mulligan R, Bargassa M, Hamilton JE, Cunningham MA, Joachimiak A J Biol Chem. 2012 Jun 1;287(23):19452-61. Epub 2012 Apr 5. PMID:22493430^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.