scholarly journals Strategic Mutations in the Class I Major Histocompatibility Complex HLA-A2 Independently Affect Both Peptide Binding and T Cell Receptor Recognition

2004 ◽  
Vol 279 (28) ◽  
pp. 29175-29184 ◽  
Author(s):  
Tiffany K. Baxter ◽  
Susan J. Gagnon ◽  
Rebecca L. Davis-Harrison ◽  
John C. Beck ◽  
Anne-Kathrin Binz ◽  
...  
Keyword(s):  
Major Histocompatibility Complex ◽  
T Cell ◽  
T Cell Receptor ◽  
Peptide Binding ◽  
Cell Receptor ◽  
Class I ◽  
Major Histocompatibility ◽  
Histocompatibility Complex ◽  
Receptor Recognition

T cell receptor recognition of a 'super-bulged' major histocompatibility complex class I–bound peptide

2005 ◽  
Vol 6 (11) ◽  
pp. 1114-1122 ◽  
Author(s):  
Fleur E Tynan ◽  
Scott R Burrows ◽  
Ashley M Buckle ◽  
Craig S Clements ◽  
Natalie A Borg ◽  
...  
Keyword(s):  
Major Histocompatibility Complex ◽  
T Cell ◽  
Major Histocompatibility Complex Class ◽  
T Cell Receptor ◽  
Cell Receptor ◽  
Class I ◽  
Complex Class ◽  
Major Histocompatibility ◽  
Histocompatibility Complex ◽  
Receptor Recognition

scholarly journals Class I Major Histocompatibility Complex Anchor Substitutions Alter the Conformation of T Cell Receptor Contacts

2001 ◽  
Vol 276 (24) ◽  
pp. 21443-21449 ◽  
Author(s):  
Ashwani K. Sharma ◽  
Jennifer J. Kuhns ◽  
Shuqin Yan ◽  
Randall H. Friedline ◽  
Brian Long ◽  
...  
Keyword(s):  
Major Histocompatibility Complex ◽  
T Cell ◽  
T Cell Receptor ◽  
Cell Receptor ◽  
Class I ◽  
Major Histocompatibility ◽  
Histocompatibility Complex

Wild type and tailless CD8 display similar interaction with microfilaments during capping

1991 ◽  
Vol 100 (2) ◽  
pp. 329-337
Author(s):  
P. Andre ◽  
J. Gabert ◽  
A.M. Benoliel ◽  
C. Capo ◽  
C. Boyer ◽  
...  
Keyword(s):  
Major Histocompatibility Complex ◽  
T Cell ◽  
Cell Surface ◽  
T Cell Receptor ◽  
Cell Receptor ◽  
Class I ◽  
Surface Markers ◽  
Major Histocompatibility ◽  
Wild Type ◽  
Histocompatibility Complex

We examined the influence of the intracytoplasmic region of CD8 alpha on capping and interaction with microfilaments. We used cell clones obtained by transfecting a CD4+ T-cell hybridoma with (a) T-cell receptor (TCR) alpha and beta chains from a cytolytic clone and (b) CD8 alpha genes that were either native or modified by extensive deletion of the intracytoplasmic region or replacement of the transmembrane and intracytoplasmic domains with those of a class I major histocompatibility complex gene (Letourneur et al. (1990). Proc. natn. Acad. Sci. U.S.A. 87, 2339–2343). Different cell surface structures were cross-linked with anti-T-cell receptor, anti-CD8 or anti-class I monoclonal antibodies and anti-immunoglobulin (Fab')2. Double labeling and quantitative image analysis were combined to monitor fluorescence anisotropy and correlation between different markers. Microfilaments displayed maximal polarization within two minutes. The correlation between these structures and surface markers was then maximal and started decreasing, whereas the redistribution of surface markers remained stable or continued. Furthermore, wild type and altered CD8 alpha exhibited similar ability to be capped and to induce co-capping of TCR and MHC (major histocompatibility complex) class I: the fraction of cell surface label redistributed into a localized cap ranged between 40% and 80%. Finally, cytochalasin D dramatically decreased CD8 capping in all tested clones. It is concluded that the transmembrane and/or intracellular domains of CD8 molecules are able to drive the extensive redistributions of membrane structures and cytoskeletal elements that are triggered by CD8 cross-linking.

scholarly journals Clone-specific T cell receptor antagonists of major histocompatibility complex class I-restricted cytotoxic T cells.

1993 ◽  
Vol 177 (6) ◽  
pp. 1541-1550 ◽  
Author(s):  
S C Jameson ◽  
F R Carbone ◽  
M J Bevan
Keyword(s):  
T Cells ◽  
Major Histocompatibility Complex ◽  
T Cell ◽  
T Cell Receptor ◽  
Cell Receptor ◽  
Class I ◽  
Major Histocompatibility ◽  
Class I Mhc ◽  
Histocompatibility Complex ◽  
T Cell Clone

A previous report showed that the proliferative response of helper T cells to class II major histocompatibility complex (MHC)-restricted antigens can be inhibited by analogues of the antigen, which act as T cell receptor (TCR) antagonists. Here we define and analyze peptide variants that antagonize various functions of class I MHC-restricted cytotoxic T lymphocyte (CTL) clones. Of 64 variants at individual TCR contact sites of the Kb-restricted octamer peptide ovalbumin257-264 (OVAp), a very high proportion (40%) antagonized lysis by three OVAp-specific CTL clones. This effect was highly clone specific, since many antagonists for one T cell clone have differential effects on another. We show that this inhibition of CTL function is not a result of T cell-T cell interaction, precluding veto-like phenomena as a mechanism for antagonism. Moreover, we present evidence for direct interaction between the TCR and antagonist-MHC complexes. In further analysis of the T cell response, we found that serine esterase release and cytokine production are susceptible to TCR antagonism similarly to lysis. Ca2+ flux, an early event in signaling, is also inhibited by antagonists but may be more resistant to the antagonist effect than downstream responses.

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