2wkc

Crystal structure from a single-stranded DNA binding protein from the lactococcal phage p2

spinqualitylabelsall models 2wkc, resolution 2.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2wkc is a 4 chain structure with sequence from Lactococcus virus P2. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.6Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q09WL7_9CAUD Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Lactococcus lactis, a Gram-positive bacterium widely used by the dairy industry, is subject to infection by a diverse population of virulent phages, predominantly by those of the 936 group, including the siphovirus phage p2. Confronted with the negative impact of phage infection on milk fermentation, the study of the biology of lactococcal provides insight from applied and fundamental perspectives. We decided to characterize the product of the orf34 gene from lactococcus phage p2, which was considered as a candidate single-stranded DNA binding protein (SSB) due to its localization downstream of a gene coding for a single-strand annealing protein. Two-dimensional gel electrophoresis showed that ORF34(p2) is expressed in large amounts during the early phases of phage infection, suggesting an important role in this process. Gel-shift assays, surface plasmon resonance and atomic force microscopy demonstrated that ORF34(p2) interacts with single-strand DNA with nanomolar affinity. We also determined the crystal structure of ORF34(p2) and showed that it bears a variation of the typical oligonucleotide/oligosaccharide binding-fold of SSBs. Finally, we found that ORF34(p2) is able to stimulate Escherichia coli RecA-mediated homologous recombination. The specific structural and biochemical properties that distinguish ORF34(p2) from other SSB proteins are discussed. Structure and function of phage p2 ORF34(p2), a new type of single-stranded DNA binding protein.,Scaltriti E, Tegoni M, Rivetti C, Launay H, Masson JY, Magadan AH, Tremblay D, Moineau S, Ramoni R, Lichiere J, Campanacci V, Cambillau C, Ortiz-Lombardia M Mol Microbiol. 2009 Sep;73(6):1156-70. Epub 2009 Aug 25. PMID:19719513 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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