A Photo-Crosslinkable Biotin Derivative of the Phosphoantigen (E)-4-Hydroxy-3-Methylbut-2-Enyl Diphosphate (HMBPP) Activates Vγ9Vδ2 T Cells and Binds to the HMBPP Site of BTN3A1.
Chemistry
; 23(49): 11945-11954, 2017 Sep 04.
Article
em En
| MEDLINE
| ID: mdl-28631855
Vγ9Vδ2 T cells play an important role in the cross talk of the innate and adaptive immune system. For their activation by phosphoantigens (PAgs), both cell surface receptors, the eponymous Vγ9Vδ2 T cell antigen receptors (Vγ9Vδ2 TCRs) on Vγ9Vδ2 T cells and butyrophilin 3A1 (BTN3A1) on the phosphoantigen-"presenting" cell, are mandatory. To find yet undetected but further contributing proteins, a biotinylated, photo-crosslinkable benzophenone probe BioBP-HMBPP (2) was synthesized from a known allyl alcohol in nine steps and overall 16 % yield. 2 is based on the picomolar PAg (E)-4-hydroxy-3-methylbut-2-enyl diphosphate (HMBPP, 1). Laser irradiation of 2 at 308â
nm initiated the photo-crosslinking reaction with proteins. When the B30.2 domain of BTN3A1, which contains a positively charged PAg-binding pocket, was exposed to increasing amounts of HMBPP (1), labeling by BioBP-HMBPP (2) was reduced significantly. Because BSA labeling was not impaired, 2 clearly binds to the same site as natural ligand 1. Thus, BioBP-HMBPP (2) is a suitable tool to identify co-ligands or receptors involved in PAg-mediated T cell activation.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Compostos Organofosforados
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Biotina
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Antígenos CD
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Butirofilinas
Limite:
Animals
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Humans
Idioma:
En
Revista:
Chemistry
Assunto da revista:
QUIMICA
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Alemanha