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The crystal structure of a major dust mite allergen Der p 2, and its biological implications.

journal contribution
posted on 19.04.2002, 00:00 by U. Derewenda, J Li, Z Derewenda, Z Dauter, G. A. Mueller, Gordon RuleGordon Rule, D. C. Benjamin

The crystal structure of the common house mite (Dermatophagoides sp.) Der p 2 allergen was solved at 2.15 A resolution using the MAD phasing technique, and refined to an R-factor of 0.209. The refined atomic model, which reveals an immunoglobulin-like tertiary fold, differs in important ways from the previously described NMR structure, because the two beta-sheets are significantly further apart and create an internal cavity, which is occupied by a hydrophobic ligand. This interaction is structurally reminiscent of the binding of a prenyl group by a regulatory protein, the Rho guanine nucleotide exchange inhibitor. The crystal structure suggests that binding of non-polar molecules may be essential to the physiological function of the Der p 2 protein.