RIPK1, Receptor-interacting serine/threonine-protein kinase 1
Enzyme Classification 18.104.22.168
Also Known as
RIPK1_HUMAN, RIPK1, RIP, RIP1
Serine-threonine kinase which transduces inflammatory and cell-death signals (programmed necrosis) following death receptors ligation, activation of pathogen recognition receptors (PRRs), and DNA damage (PubMed:11101870, PubMed:17389591, PubMed:19524512, PubMed:19524513). Upon activation of TNFR1 by the TNF-alpha family cytokines, TRADD and TRAF2 are recruited to the receptor (PubMed:11101870, PubMed:17389591, PubMed:19524512, PubMed:19524513). Phosphorylates DAB2IP at 'Ser-728' in a TNF-alpha-dependent manner, and thereby activates the MAP3K5-JNK apoptotic cascade (PubMed:17389591). Ubiquitination by TRAF2 via 'Lys-63'-link chains acts as a critical enhancer of communication with downstream signal transducers in the mitogen-activated protein kinase pathway and the NF-kappa-B pathway, which in turn mediate downstream events including the activation of genes encoding inflammatory molecules (PubMed:15258597). Polyubiquitinated protein binds to IKBKG/NEMO, the regulatory subunit of the IKK complex, a critical event for NF-kappa-B activation. Interaction with other cellular RHIM-containing adapters initiates gene activation and cell death (PubMed:15258597). RIPK1 and RIPK3 association, in particular, forms a necrosis-inducing complex (PubMed:19524513, PubMed:19524512). Interacts (via RIP homotypic interaction motif) with RIPK3 (via RIP homotypic interaction motif) (PubMed:11734559, PubMed:29883609, PubMed:19524512, PubMed:10358032). Upon TNF-induced necrosis, the RIPK1-RIPK3 dimer further interacts with PGAM5 and MLKL; the formation of this complex leads to PGAM5 phosphorylation and increase in PGAM5 phosphatase activity (PubMed:22265414). Interacts (via the death domain) with TNFRSF6 (via the death domain) and TRADD (via the death domain) (PubMed:8612133). Is recruited by TRADD to TNFRSF1A in a TNF-dependent process (PubMed:24130170). Binds RNF216, EGFR, IKBKG, TRAF1, TRAF2 and TRAF3 (PubMed:8612133, PubMed:9927690, PubMed:11854271, PubMed:11116146). Interacts with BNLF1 (PubMed:10409763). Interacts with SQSTM1 upon TNF-alpha stimulation (PubMed:10356400). May interact with MAVS/IPS1 (PubMed:16127453). Interacts with ZFAND5 (PubMed:14754897). Interacts with RBCK1 (PubMed:17449468). Interacts with ZBP1 (By similarity). Interacts with BIRC2/c-IAP1, BIRC3/c-IAP2 and XIAP/BIRC4 (PubMed:21931591). Interacts (via kinase domain) with DAB2IP (via Ras-GAP domain); the interaction occurs in a TNF-alpha-dependent manner (PubMed:17389591). Interacts with ARHGEF2 (PubMed:21887730). Interacts (via protein kinase domain) with RFFL; involved in RIPK1 ubiquitination (PubMed:18450452). Interacts with RNF34; involved in RIPK1 ubiquitination (Ref.33). Interacts with TICAM1 and this interaction is enhanced in the presence of WDFY1 (PubMed:25736436). Interacts with PELI1 (PubMed:29883609). Interacts (via Death domain) with CRADD (via Death domain); the interaction is direct (PubMed:9044836).