Center for Structural Genomics of Infectious Diseases

To see full content of that page you need the activeISee plugin.
Get the latest version from here.

Structure of IDP00047

CSGID target: IDP00047
PDB Id: 3PP9 (NCBI MMDB)
Authors: 'A.S.Halavaty,Z.Wawrzak,O.Onopriyenko,A.Edwards,A.Savchenko,S.Peterson,W.F.Anderson,Center For Structural Genomics Of Infectious Diseases (Csgid)'
Responsible person: Andrei Halavaty
Responsible lab: Northwestern University
Deposition Date: Nov 24, 2010
Release Date: Jan 12, 2011

Description: The structure of the putative Se-Met streptothricin acetyltransferase from Bacillus anthracis str. Ames in complex with acetyl coenzyme A was solved by SAD. The protein is mostly β-stranded (40 %) with 20 % of the helical component. The core of the enzyme is a six-stranded antiparallel β-sheet, which ideal alignment is disrupted by the aliphatic tail of Acetyl-CoA. The tail mimics β-strand-β-strand hydrogen bonding interactions, making the sheet quasi seven-stranded. Each of three copies of the protein binds a single Acetyl-CoA molecule, which electron density is well defined. The chains B and C form a dimer with the buried surface area of 2140 A2, whereas chain A makes identical dimer with a symmetry related molecule with 2480 A2 of buried surface area. Monomers in the dimer interact such a way that a six-stranded antiparallel β-sheet is formed.
Functional assignment: Transferase

Ligand code	Name	Ligand type
PO4		crystallization
ACO		biological
MSE		modified residue
175	3,5-dihydro-5-methylidene-4h-imidazol-4-on