Definition of APC Presentation of Phosphoantigen (E)-4-hydroxy-3-methyl-but-2-enyl Pyrophosphate to Vgamma2Vdelta 2 TCR
Overview
Affiliations
Although microbial (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate (HMBPP) can activate primate Vgamma2Vdelta2 T cells, molecular mechanisms by which HMBPP interacts with Vgamma2Vdelta2 T cells remain poorly characterized. Here, we developed soluble, tetrameric Vgamma2Vdelta2 TCR of rhesus macaques to define HMBPP/APC interaction with Vgamma2Vdelta2 TCR. While exogenous HMBPP was associated with APC membrane in an appreciable affinity, the membrane-associated HMBPP readily bound to the Vgamma2Vdelta2 TCR tetramer. The Vgamma2Vdelta2 TCR tetramer was shown to bind stably to HMBPP presented on membrane by various APC cell lines from humans and nonhuman primates but not those from mouse, rat, or pig. The Vgamma2Vdelta2 TCR tetramer also bound to the membrane-associated HMBPP on primary monocytes, B cells and T cells. Consistently, endogenous phosphoantigen produced in Mycobacterium-infected dendritic cells was transported and presented on membrane, and bound stably to the Vgamma2Vdelta2 TCR tetramer. The capability of APC to present HMBPP for recognition by Vgamma2Vdelta2 TCR was diminished after protease treatment of APC. Thus, our studies elucidated an affinity HMBPP-APC association conferring stable binding to the Vgamma2Vdelta2 TCR tetramer and the protease-sensitive nature of phosphoantigen presentation. The findings defined APC presentation of phosphoantigen HMBPP to Vgamma2Vdelta2 TCR.
Wei J, Guo F, Song Y, Feng T, Wang Y, Xu K Cell Mol Biol Lett. 2024; 29(1):70.
PMID: 38741147 PMC: 11089708. DOI: 10.1186/s11658-024-00585-7.
Liang J, Fu L, Li M, Chen Y, Wang Y, Lin Y Front Immunol. 2022; 12:756495.
PMID: 34975844 PMC: 8715986. DOI: 10.3389/fimmu.2021.756495.
The Dual Roles of Human γδ T Cells: Anti-Tumor or Tumor-Promoting.
Li Y, Li G, Zhang J, Wu X, Chen X Front Immunol. 2021; 11:619954.
PMID: 33664732 PMC: 7921733. DOI: 10.3389/fimmu.2020.619954.
IspH inhibitors kill Gram-negative bacteria and mobilize immune clearance.
Singh K, Sharma R, Reddy P, Vonteddu P, Good M, Sundarrajan A Nature. 2020; 589(7843):597-602.
PMID: 33361818 PMC: 8776033. DOI: 10.1038/s41586-020-03074-x.
Kadri H, Taher T, Xu Q, Sharif M, Ashby E, Bryan R J Med Chem. 2020; 63(19):11258-11270.
PMID: 32930595 PMC: 7549095. DOI: 10.1021/acs.jmedchem.0c01232.