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Göteborgs universitets publikationer

The structure of superantigen complexed with TCR and MHC reveals novel insights into superantigenic T cell activation.

Författare och institution:
Maria Saline (Institutionen för kemi & Svenskt NMR-centrum vid Göteborgs universitet); Karin Rödström (Institutionen för cell- och molekylärbiologi & Svenskt NMR-centrum vid Göteborgs universitet); Gerhard Fischer (Institutionen för kemi); Vladislav Orekhov (Institutionen för kemi & Svenskt NMR-centrum vid Göteborgs universitet); B Göran Karlsson (Svenskt NMR-centrum vid Göteborgs universitet); Karin Lindkvist-Petersson (Institutionen för cell- och molekylärbiologi)
Publicerad i:
Nature communications, 1 ( 8 ) s. 119
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
Superantigens (SAgs) are bacterial toxins that interact with immunoreceptors, T cell receptor (TCR) and major histocompatibility complex (MHC) class II, conventionally through the variable β-domain of TCR (TCRVβ). They induce a massive release of cytokines, which can lead to diseases such as food poisoning and toxic shock syndrome. In this study, we report the X-ray structure of the ternary complex between staphylococcal enterotoxin H (SEH) and its human receptors, MHC class II and TCR. The structure demonstrates that SEH predominantly interacts with the variable α-domain of TCR (TCRVα), which is supported by nuclear magnetic resonance (NMR) analyses. Furthermore, there is no contact between MHC and TCR upon complex formation. Structural analyses suggest that the major contact points to TCRVα are conserved among other bacterial SAgs. Consequently, a new dimension of SAg biology emerges, suggesting that in addition to the conventional interactions with the TCRVβ domain, SAgs can also activate T cells through the TCRVα domain.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Biologiska vetenskaper
Medicinska grundvetenskaper ->
Mikrobiologi inom det medicinska området
Postens nummer:
Posten skapad:
2011-01-10 19:38
Posten ändrad:
2011-11-29 09:46

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