Topology of T cell receptor-peptide/class I MHC interaction defined by charge reversal complementation and functional analysis.
Topology of T cell receptor-peptide/class I MHC interaction defined by charge reversal complementation and functional analysis.
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由电荷反转互补和功能分析定义的 T 细胞受体-肽/I 类 MHC 相互作用的拓扑。
DOI:
10.1006/jmbi.1997.1169
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发表时间:
1997
期刊:
影响因子:
--
通讯作者:
Reinherz,EL
中科院分区:
文献类型:
--
作者:
Chang,HC;Smolyar,A;Spoerl,R;Witte,T;Yao,Y;Goyarts,EC;Nathenson,SG;Reinherz,EL
The molecular interactions between the CD8 co-receptor dependent N15 and N26 T cell receptors (TCRs) and their common ligand, the vesicular stomatitis virus octapeptide (VSV8) bound to H-2Kb, were studied to define the docking orientation(s) of MHC class I restricted TCRs during immune recognition. Guided by the molecular surfaces of the crystallographically defined peptide/MHC and modeled TCRs, a series of mutations in exposed residues likely contacting the TCR ligand were analyzed for their ability to alter peptide-triggered IL-2 production in T cell transfectants. Critical residues which diminished antigen recognition by 1000 to 10,000-fold in molar terms were identified in both N15 Vα (αE94A or αE94R, Y98A and K99) and Vβ (βR96A, βW97A and βD99A) CDR3 loops. Mutational analysis indicated that the Rp1 residue of VSV8 is critical for antigen recognition of N15 TCR, but R62 of H-2Kbis less critical. More importantly, the αE94R mutant could be fully complemented by a reciprocal charge reversal at KbR62 (R62E). This result suggests a direct interaction between N15 TCR Vα E94R and KbR62E residues. As Rp1 of VSV8 is adjacent to R62 in the VSV8/Kbcomplex and essential for T cell activation, this orientation implies that the N15 Vα CDR3 loop interacts with the N-terminal residues of VSV8 with the Vα domain docking to the Kbα2 helix while the N15 Vβ CDR3 loop interacts with the more C-terminal peptide residues and the Vβ domain overlies the Kbα1 helix. An equivalent orientation is suggested for N26, a second VSV8/Kbspecific TCR. Given that genetic analysis of two different class II MHC-restricted TCRs and two crystallographic studies of class I restricted TCRs offers a similar overall orientation of V domains relative to α-helices, these data raise the possibility of a common docking mode between TCRs and their ligands regardless of MHC restriction.
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DOI:
--
发表时间:
1985
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Staerz,UD;Rammensee,HG;Benedetto,JD;Bevan,MJ
通讯作者:
Bevan,MJ
影响因子:
5.4
作者:
F. Letourneur;B. Malissen
通讯作者:
B. Malissen
DOI:
--
发表时间:
1993
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Kasibhatla,S;Nalefski,EA;Rao,A
通讯作者:
Rao,A
影响因子:
56.9
作者:
Fremont, DH;Hendrickson, WA;Kappler, J
通讯作者:
Kappler, J
影响因子:
5.6
作者:
LEE, C
通讯作者:
LEE, C