Tec kinases, actin, and cell adhesion.
The Tec family non-receptor tyrosine kinases have been recognized for their roles in the regulation of phospholipase C-gamma and Ca(2+) mobilization downstream from antigen receptors on lymphocytes. Recent data, however, show that the Tec family kinase interleukin-2-inducible T-cell kinase (Itk) also participates in pathways regulating the actin cytoskeleton and 'inside-out' signaling to integrins downstream from the T-cell antigen receptor. Data suggest that Itk may function in a kinase-independent fashion to regulate proper recruitment of the Vav1 guanine nucleotide exchange factor. By enhancing actin cytoskeleton reorganization, recruitment of signaling molecules to the immune synapse, and integrin clustering in response to both antigen and chemokine receptors, the Tec kinases serve as modulators or amplifiers that can increase the duration of T-cell signaling and regulate T-cell functional responses.
Gomez-Rodriguez
Julio
J
National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892, USA.
Readinger
Julie A
JA
Viorritto
Irene C
IC
Mueller
Kristen L
KL
Houghtling
Richard A
RA
Schwartzberg
Pamela L
PL
D000199:Actins / Q000378:metabolism*; D000818:Animals; D002448:Cell Adhesion; D004789:Enzyme Activation; D006801:Humans; D008214:Lymphocytes / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D011505:Protein-Tyrosine Kinases / Q000737:chemistry / Q000145:classification / Q000172:deficiency / Q000378:metabolism*; D015398:Signal Transduction
D000199:Actins; C089848:Tec protein-tyrosine kinase; D011505:Protein-Tyrosine Kinases