4m00

Crystal structure of the ligand binding region of staphylococcal adhesion SraP

spinqualitylabelsall models 4m00, resolution 2.05Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4m00 is a 1 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CA, MES, SUC Related: 4m01, 4m02, 4m03 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [SRAP_STAA8] Mediates binding to human platelets, possibly through a receptor-ligand interaction. Probably associated with virulence in endovascular infection. Publication Abstract from PubMed Staphylococcus aureus, a Gram-positive bacterium causes a number of devastating human diseases, such as infective endocarditis, osteomyelitis, septic arthritis and sepsis. S. aureus SraP, a surface-exposed serine-rich repeat glycoprotein (SRRP), is required for the pathogenesis of human infective endocarditis via its ligand-binding region (BR) adhering to human platelets. It remains unclear how SraP interacts with human host. Here we report the 2.05 A crystal structure of the BR of SraP, revealing an extended rod-like architecture of four discrete modules. The N-terminal legume lectin-like module specifically binds to N-acetylneuraminic acid. The second module adopts a beta-grasp fold similar to Ig-binding proteins, whereas the last two tandem repetitive modules resemble eukaryotic cadherins but differ in calcium coordination pattern. Under the conditions tested, small-angle X-ray scattering and molecular dynamic simulation indicated that the three C-terminal modules function as a relatively rigid stem to extend the N-terminal lectin module outwards. Structure-guided mutagenesis analyses, in addition to a recently identified trisaccharide ligand of SraP, enabled us to elucidate that SraP binding to sialylated receptors promotes S. aureus adhesion to and invasion into host epithelial cells. Our findings have thus provided novel structural and functional insights into the SraP-mediated host-pathogen interaction of S. aureus. Structural Insights into SraP-Mediated Staphylococcus aureus Adhesion to Host Cells.,Yang YH, Jiang YL, Zhang J, Wang L, Bai XH, Zhang SJ, Ren YM, Li N, Zhang YH, Zhang Z, Gong Q, Mei Y, Xue T, Zhang JR, Chen Y, Zhou CZ PLoS Pathog. 2014 Jun 5;10(6):e1004169. doi: 10.1371/journal.ppat.1004169., eCollection 2014 Jun. PMID:24901708 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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