6jiq

Crystal structure of Streptococcus pneumoniae SP_0782 (residues 7-79) in complex with single-stranded DNA dT6

spinqualitylabelsall models 6jiq, resolution 1.67Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6jiq is a 2 chain structure with sequence from Streptococcus pneumoniae R6 and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.67Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q8DQG2_STRR6 Publication Abstract from PubMed SP_0782 from Streptococcus pneumoniae is a dimeric protein that potentially binds with single-stranded DNA (ssDNA) in a manner similar to human PC4, the prototype of PC4-like proteins, which plays roles in transcription and maintenance of genome stability. In a previous NMR study, SP_0782 exhibited an ssDNA-binding property different from YdbC, a prokaryotic PC4-like protein from Lactococcus lactis, but the underlying mechanism remains unclear. Here, we show that although SP_0782 adopts an overall fold similar to those of PC4 and YdbC, the ssDNA length occupied by SP_0782 is shorter than those occupied by PC4 and YdbC. SP_0782 exhibits varied binding patterns for different lengths of ssDNA, and tends to form large complexes with ssDNA in a potential high-density binding manner. The structures of SP_0782 complexed with different ssDNAs reveal that the varied binding patterns are associated with distinct capture of nucleotides in two major DNA-binding regions of SP_0782. Moreover, a comparison of known structures of PC4-like proteins complexed with ssDNA reveals a divergence in the binding interface between prokaryotic and eukaryotic PC4-like proteins. This study provides insights into the ssDNA-binding mechanism of PC4-like proteins, and benefits further study regarding the biological function of SP_0782, probably in DNA protection and natural transformation. Structural insight into the length-dependent binding of ssDNA by SP_0782 from Streptococcus pneumoniae, reveals a divergence in the DNA-binding interface of PC4-like proteins.,Li S, Lu G, Fang X, Ramelot TA, Kennedy MA, Zhou X, Gong P, Zhang X, Liu M, Zhu J, Yang Y Nucleic Acids Res. 2019 Nov 12. pii: 5622711. doi: 10.1093/nar/gkz1045. PMID:31713614 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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