2gsg
Crystal structure of the Fv fragment of a monoclonal antibody specific for poly-glutamineCrystal structure of the Fv fragment of a monoclonal antibody specific for poly-glutamine
Structural highlights
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 PubMedHuntington and related neurological diseases result from expansion of a polyglutamine (polyQ) tract. The linear lattice model for the structure and binding properties of polyQ proposes that both expanded and normal polyQ tracts in the preaggregation state are random-coil structures but that an expanded polyQ repeat contains a larger number of epitopes recognized by antibodies or other proteins. The crystal structure of polyQ bound to MW1, an antibody against polyQ, reveals that polyQ adopts an extended, coil-like structure. Consistent with the linear lattice model, multimeric MW1 Fvs bind more tightly to longer than to shorter polyQ tracts and, compared with monomeric Fv, bind expanded polyQ repeats with higher apparent affinities. These results suggest a mechanism for the toxicity of expanded polyQ and a strategy to link anti-polyQ compounds to create high-avidity therapeutics. The structure of a polyQ-anti-polyQ complex reveals binding according to a linear lattice model.,Li P, Huey-Tubman KE, Gao T, Li X, West AP Jr, Bennett MJ, Bjorkman PJ Nat Struct Mol Biol. 2007 May;14(5):381-7. Epub 2007 Apr 22. PMID:17450152[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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