4n4q

Crystal Structure of N-acetylneuraminate lyase from Mycoplasma synoviae, crystal form II

spinqualitylabelsall models 4n4q, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4n4q is a 4 chain structure with sequence from Mycoplasmopsis synoviae 53. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q4A6K4_MYCS5 Publication Abstract from PubMed The GroEL/ES chaperonin system functions as a protein folding cage. Many obligate substrates of GroEL share the (betaalpha)8 TIM-barrel fold, but how the chaperonin promotes folding of these proteins is not known. Here, we analyzed the folding of DapA at peptide resolution using hydrogen/deuterium exchange and mass spectrometry. During spontaneous folding, all elements of the DapA TIM barrel acquire structure simultaneously in a process associated with a long search time. In contrast, GroEL/ES accelerates folding more than 30-fold by catalyzing segmental structure formation in the TIM barrel. Segmental structure formation is also observed during the fast spontaneous folding of a structural homolog of DapA from a bacterium that lacks GroEL/ES. Thus, chaperonin independence correlates with folding properties otherwise enforced by protein confinement in the GroEL/ES cage. We suggest that folding catalysis by GroEL/ES is required by a set of proteins to reach native state at a biologically relevant timescale, avoiding aggregation or degradation. GroEL/ES Chaperonin Modulates the Mechanism and Accelerates the Rate of TIM-Barrel Domain Folding.,Georgescauld F, Popova K, Gupta AJ, Bracher A, Engen JR, Hayer-Hartl M, Hartl FU Cell. 2014 May 8;157(4):922-34. doi: 10.1016/j.cell.2014.03.038. PMID:24813614 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also N-acetylneuraminate lyase 3D structures

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