3ki9 is a 1 chain structure with sequence from Staphylococcus aureus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Proteases belonging to the M20 family are characterized by diverse substrate specificity and participate in several metabolic pathways. The Staphylococcus aureus metallopeptidase, Sapep, is a member of the aminoacylase-I/M20 protein family. This protein is a Mn(2+)-dependent dipeptidase. The crystal structure of this protein in the Mn(2+)-bound form and in the open, metal-free state suggests that large interdomain movements could potentially regulate the activity of this enzyme. We note that the extended inactive conformation is stabilized by a disulfide bond in the vicinity of the active site. Although these cysteines, Cys(155) and Cys(178), are not active site residues, the reduced form of this enzyme is substantially more active as a dipeptidase. These findings acquire further relevance given a recent observation that this enzyme is only active in methicillin-resistant S. aureus. The structural and biochemical features of this enzyme provide a template for the design of novel methicillin-resistant S. aureus-specific therapeutics.
Crystal structure of Staphylococcus aureus metallopeptidase (Sapep) reveals large domain motions between the manganese-bound and apo-states.,Girish TS, Gopal B J Biol Chem. 2010 Sep 17;285(38):29406-15. Epub 2010 Jul 7. PMID:20610394[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
↑ Girish TS, Gopal B. Crystal structure of Staphylococcus aureus metallopeptidase (Sapep) reveals large domain motions between the manganese-bound and apo-states. J Biol Chem. 2010 Sep 17;285(38):29406-15. Epub 2010 Jul 7. PMID:20610394 doi:10.1074/jbc.M110.147579
