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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Immunol
2017 ; 18
(1
): 86-95
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A cycle of Zap70 kinase activation and release from the TCR amplifies and
disperses antigenic stimuli
#MMPMID27869819
Katz ZB
; Novotná L
; Blount A
; Lillemeier BF
Nat Immunol
2017[Jan]; 18
(1
): 86-95
PMID27869819
show ga
Cell-surface-receptor pathways amplify weak, rare and local stimuli to induce
cellular responses. This task is accomplished despite signaling components that
segregate into nanometer-scale membrane domains. Here we describe a
'catch-and-release' mechanism that amplified and dispersed stimuli by releasing
activated kinases from receptors lacking intrinsic catalytic activity.
Specifically, we discovered a cycle of recruitment, activation and release for
Zap70 kinases at phosphorylated T cell antigen receptors (TCRs). This turned the
TCR into a 'catalytic unit' that amplified antigenic stimuli. Zap70 released from
the TCR remained at the membrane, translocated, and phosphorylated spatially
distinct substrates. The mechanisms described here are based on widely used
protein domains and post-translational modifications; therefore, many
membrane-associated pathways might employ similar mechanisms for signal
amplification and dispersion.
|*Activity Cycles
[MESH]
|Adaptor Proteins, Signal Transducing/metabolism
[MESH]