期刊
PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS
卷 63, 期 4, 页码 733-741出版社
WILEY
DOI: 10.1002/prot.20919
关键词
Vibrio cholerae; VC0702; biofilm regulation; dNTPase; pyrophosphatase; VC0703; MbaA; dUTPase
资金
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [P50GM062413] Funding Source: NIH RePORTER
- NIGMS NIH HHS [P50-GM62413] Funding Source: Medline
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 angstrom and refined to R-work = 22.8% and R-free = 26.3%. VC0702 crystallized in an orthorhombic crystal lattice in the C222(1) space group with dimensions of a = 66.61 angstrom, b = 88.118 angstrom, and c = 118.35 angstrom 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.
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