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- Title
Structure of the staphylococcal enterotoxin B vaccine candidate S19 showing eliminated superantigen activity.
- Authors
Jeong, Woo Hyeon; Song, Dong Hyun; Hur, Gyeung Haeng; Jeong, Seong Tae
- Abstract
Four mutations (N23A, Y90A, R110A and F177A) were introduced into S19, a vaccine candidate for staphylococcal enterotoxin B (SEB), resulting in a lower binding affinity towards the T-cell receptor beta chain (TCB) and reducing its superantigen activity. The structure of S19 was solved and was superposed on the native or complex structure of SEB. In the superposition model, mutations that were introduced seemed to reduce the number of hydrogen bonds at the SEB-TCB interface. S19 also displayed an unexpected structural change around the flexible-loop region owing to the Y90A mutation. This local structural change provided evidence that the mutated form of S19 could have a lower affinity for major histocompatibility complex (MHC) class II than wild-type SEB.
- Subjects
ENTEROTOXINS; STAPHYLOCOCCUS; SUPERANTIGENS
- Publication
Acta Crystallographica: Section F, Structural Biology Communications, 2017, Vol 73, Issue 11, p595
- ISSN
2053-230X
- Publication type
Article
- DOI
10.1107/S2053230X17014844