3g3a

Structure of a lamprey variable lymphocyte receptor in complex with a protein antigen

spinqualitylabelsall models 3g3a, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3g3a is a 8 chain structure with sequence from Gallus gallus and Petromyzon marinus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.2Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function D0VX18_PETMA Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Variable lymphocyte receptors (VLRs) are leucine-rich repeat proteins that mediate adaptive immunity in jawless vertebrates. VLRs are fundamentally different from the antibodies of jawed vertebrates, which consist of immunoglobulin (Ig) domains. We determined the structure of an anti-hen egg white lysozyme (HEL) VLR, isolated by yeast display, bound to HEL. The VLR, whose affinity resembles that of IgM antibodies, uses nearly all its concave surface to bind the protein, in addition to a loop that penetrates into the enzyme active site. The VLR-HEL structure combined with sequence analysis revealed an almost perfect match between ligand-contacting positions and positions with highest sequence diversity. Thus, it is likely that we have defined the generalized antigen-binding site of VLRs. We further demonstrated that VLRs can be affinity-matured by 13-fold to affinities as high as those of IgG antibodies, making VLRs potential alternatives to antibodies for biotechnology applications. Structure of a lamprey variable lymphocyte receptor in complex with a protein antigen.,Velikovsky CA, Deng L, Tasumi S, Iyer LM, Kerzic MC, Aravind L, Pancer Z, Mariuzza RA Nat Struct Mol Biol. 2009 Jul;16(7):725-30. Epub 2009 Jun 21. PMID:19543291 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Lamprey Variable Lymphocyte Receptor Lysozyme 3D structures Variable lymphocyte receptor Variable lymphocyte receptor 3D structures

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