Crystal Structure of VC0702 at 2.0 Angstrom: Conserved Hypothetical Protein from Vibrio Cholerae

Journal Article · Sun Jan 01 04:00:00 EST 2006 · Proteins: Struc. Func. Bioinformatics

DOI:https://doi.org/10.1002/prot.20919· OSTI ID:914149

Ni, S; Forouhar, F; Bussiere, D; Robinson, H; Kennedy, M

VC0702, a conserved hypothetical protein of unknown function from Vibrio cholerae, resides in a three-gene operon containing the MbaA gene that encodes for a GGDEF and EAL domain-containing protein which is involved in regulating formation of the extracellular matrix of biofilms in Vibrio cholerae. The VC0702 crystal structure has been determined at 2.0 Angstroms and refined to R{sub work} = 22.8% and R{sub free} = 26.3%. VC0702 crystallized in an orthorhombic crystal lattice in the C2221 space group with dimensions of a = 66.61 Angstroms, b = 88.118 Angstroms, and c = 118.35 Angstroms with a homodimer in the asymmetric unit. VC0702, which forms a mixed {alpha} + {beta} three-layered {alpha}{beta}{alpha} sandwich, belongs to the Pfam DUF84 and COG1986 families of proteins. Sequence conservation within the DUF84 and COG1986 families was used to identify a conserved patch of surface residues that define a cleft and potential substrate-binding site in VC0702. The three-dimensional structure of VC0702 is similar to that of Mj0226 from Methanococcus janeschii, which has been identified as a novel NTPase that binds NTP in a deep cleft similarly located to the conserved patch of surface residues that define an analogous cleft in VC0702. Collectively, the data suggest that VC0702 may have a biochemical function that involves NTP binding and phosphatase activity of some kind, and is likely involved in regulation of the signaling pathway that controls biofilm formation and maintenance in Vibrio cholerae.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 914149
• Report Number(s): BNL--78717-2007-JA
• Journal Information: Proteins: Struc. Func. Bioinformatics, Journal Name: Proteins: Struc. Func. Bioinformatics Journal Issue: 4 Vol. 63
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
43 PARTICLE ACCELERATORS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIMENSIONS
GENES
MAINTENANCE
NSLS
PHOSPHATASES
PROTEINS
REGULATIONS
RESIDUES
SPACE GROUPS
national synchrotron light source