5n5p

Crystal structure of Ruminococcus flavefaciens' type III complex containing the fifth cohesin from scaffoldin B and the dockerin from scaffoldin A

spinqualitylabelsall models 5n5p, resolution 1.98Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5n5p is a 4 chain structure with sequence from Ruminococcus flavefaciens FD-1. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.98Å Ligands: CA, CCN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0AEF3_RUMFL Publication Abstract from PubMed Cellulosomes are highly sophisticated molecular nanomachines that participate in the deconstruction of complex polysaccharides, notably cellulose and hemicellulose. Cellulosomal assembly is orchestrated by the interaction of enzyme-borne dockerin (Doc) modules to tandem cohesin (Coh) modules of a non-catalytic primary scaffoldin. In some cases, as exemplified by the cellulosome of the major cellulolytic ruminal bacterium Ruminococcus flavefaciens, primary scaffoldins bind to adaptor scaffoldins that further interact with the cell surface via anchoring scaffoldins, thereby increasing cellulosome complexity. Here we elucidate the structure of the unique Doc of R. flavefaciens FD-1 primary scaffoldin ScaA, bound to Coh 5 of the adaptor scaffoldin ScaB. The RfCohScaB5-DocScaA complex has an elliptical architecture similar to previously described complexes from a variety of ecological niches. ScaA Doc presents a single-binding mode, analogous to that described for the other two Coh-Doc specificities required for cellulosome assembly in R. flavefaciens. The exclusive reliance on a single-mode of Coh recognition contrasts with the majority of cellulosomes from other bacterial species described to date, where Docs contain two similar Coh-binding interfaces promoting a dual-binding mode. The discrete Coh-Doc interactions observed in ruminal cellulosomes suggest an adaptation to the exquisite properties of the rumen environment. Higher order scaffoldin assembly in Ruminococcus flavefaciens cellulosome is coordinated by a discrete cohesin-dockerin interaction.,Bule P, Pires VMR, Alves VD, Carvalho AL, Prates JAM, Ferreira LMA, Smith SP, Gilbert HJ, Noach I, Bayer EA, Najmudin S, Fontes CMGA Sci Rep. 2018 May 3;8(1):6987. doi: 10.1038/s41598-018-25171-8. PMID:29725056 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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