7t0f
From Proteopedia
Crystal structure of S25-39 Fab in complex with 4-MeO-KdoOAll
Structural highlights
Publication Abstract from PubMedConformational flexibility in antibody-combining sites has been hypothesized to facilitate polyspecificity toward multiple unique epitopes and enable the limited germline repertoire to match an overwhelming diversity of potential antigens; however, elucidating the mechanisms of antigen recognition by flexible antibodies has been understandably challenging. Here, multiple liganded and unliganded crystal structures of the near-germline anticarbohydrate antibodies S25-2 and S25-39 are reported, which reveal an unprecedented diversity of complementarity-determining region H3 conformations in apparent equilibrium. These structures demonstrate that at least some germline or near-germline antibodies are flexible entities sensitive to their chemical environments, with conformational selection available as an evolved mechanism that preserves the inherited ability to recognize common pathogens while remaining adaptable to new threats. Antigen binding by conformational selection in near-germline antibodies.,Blackler RJ, Muller-Loennies S, Pokorny-Lehrer B, Legg MSG, Brade L, Brade H, Kosma P, Evans SV J Biol Chem. 2022 May;298(5):101901. doi: 10.1016/j.jbc.2022.101901. Epub 2022 , Apr 6. PMID:35395245[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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