8gr6

Crystal Structure of pilus-specific Sortase C from Streptococcus sanguinis

spinqualitylabelsall models 8gr6, resolution 2.06Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8gr6 is a 1 chain structure with sequence from Streptococcus sanguinis SK36. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.06Å Ligands: EDO, MHS, NA, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A3CPB4_STRSV Publication Abstract from PubMed Dental plaque is a complex microbial biofilm community of many species and a major cause of oral infections and infectious endocarditis. Plaque development begins when primary colonizers attach to oral tissues and undergo coaggregation. Primary colonizers facilitate cellular attachment and inter-bacterial interactions through sortase-dependent pili (or fimbriae) extending out from their cell surface. Consequently, the sortase enzyme is viewed as a potential drug target for controlling biofilm formation and avoiding infection. Streptococcus sanguinis is a primary colonizing bacterium whose pili consist of three different pilin subunits that are assembled together by the pilus-specific (C-type) SsaSrtC sortase. Here, we report on the crystal structure determination of the recombinant wild-type and active-site mutant forms of SsaSrtC. Interestingly, the SsaSrtC structure exhibits an open-lid conformation, although a conserved DPX motif is lacking in the lid. Based on molecular docking and structural analysis, we identified the substrate-binding residues essential for pilin recognition and pilus assembly. We also demonstrated that while recombinant SsaSrtC is enzymatically active toward the five-residue LPNTG sorting motif peptide of the pilins, this activity is significantly reduced by the presence of zinc. We further showed that rutin and alpha-crocin are potential candidate inhibitors of the SsaSrtC sortase via structure-based virtual screening and inhibition assays. The structural knowledge gained from our study will provide the means to develop new approaches that target pilus-mediated attachment, thereby preventing oral biofilm growth and infection. Crystal structure of the pilus-specific sortase from early colonizing oral Streptococcus sanguinis captures an active open-lid conformation.,Yadav S, Parijat P, Krishnan V Int J Biol Macromol. 2023 Jul 15;243:125183. doi: 10.1016/j.ijbiomac.2023.125183. , Epub 2023 Jun 3. PMID:37276901 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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