Identifiers
NAME:STAT1:TNFR1*
Maps_Modules
HMC:AVOIDING_IMMUNE_DESTRUCTION
Innate Immunity / IMMUNOSTIMULATORY_CORE_PATHWAYS
References
MACROPHAGE
PMID:22435554, PMID:15169888
In unstimulated cells, TPL-2 is con???ned to a cytoplasmic complex with
the NF-jB1 precursor protein p105, and the ubiquitin-binding protein ABIN-2.
Interactions with both p105 and ABIN-2 are required to maintain
TPL-2 protein stability, while TPL-2 association with p105 also inhibits TPL-2 phosphorylation of its substrates MEK-1???2
PMID:22435554, PMID:15485931, PMID:21217011, PMID:15199157
Agonist stimulation induces IKK2, a catalytic subunit of the IKK complex, to phosphorylate p105. These phosphorylations
create a binding site for the ubiquitin E3 ligase complex SCF-bTrCP which catalyzes K48-linked polyubiquitination of p105, followed by its proteasomal
degradatio. This releases TPL-2 from p105 inhibition and allows TPL-2 to access its substrate MEK ()
in_re729( Innate Immunity ):
PMID:14607933
TNF induces the association of STAT-1 and TNFR1 in a tyrosine phosphorylation-independent manner, and and this association attenuates TNF-alpha-mediated NF-kappaB activation but formation of the TNFR1:STAT-1?? complex is inhibited upon inclusion of IFNG . IFNG limits STAT-1 availability to the TNFR1 by depleting STAT from the cytoplasm, thus allowing for optimal NF-kappaB activation upon TNF ligation.
+ TNFR1*@INNATE_IMMUNE_CELL_Membrane → STAT1|pho:TNFR1*@INNATE_IMMUNE_CELL_Membrane