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    RIPK1

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    For Research Use Only. Not For Clinical Use.


    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. Upon activation of TNFR1 by the TNF-alpha family cytokines, TRADD and TRAF2 are recruited to the receptor. Phosphorylates DAB2IP at Ser-728 in a TNF-alpha-dependent manner, and thereby activates the MAP3K5-JNK apoptotic cascade. 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. 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. RIPK1 and RIPK3 association, in particular, forms a necrosis-inducing complex.
    Protein class

    Disease related genes, Enzymes, Metabolic proteins, Potential drug targets

    Predicted location

    Intracellular

    Single cell type specificity

    Low cell type specificity

    Immune cell specificity

    Low immune cell specificity

    Cell line specificity

    Low cell line specificity

    Interaction

    Homodimer (PubMed:29440439, PubMed:29681455). Interacts (via RIP homotypic interaction motif) with RIPK3 (via RIP homotypic interaction motif); this interaction induces RIPK1 phosphorylation and formation of a RIPK1-RIPK3 necroptosis-inducing complex (PubMed:11734559, PubMed:29883609, PubMed:19524512, PubMed:10358032, PubMed:29681455). 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, PubMed:15310755). 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. 34). 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). Component of complex IIa composed of at least RIPK1, FADD and CASP8 (By similarity). Component of the AIM2 PANoptosome complex, a multiprotein complex that drives inflammatory cell death (PANoptosis) (By similarity). Interacts with MAP3K7, CFLAR, CASP8, FADD and NEMO (By similarity). (Microbial infection) Interacts with mumps virus protein SH; this interaction inhibits downstream NF-kappa-B pathway activation. (Microbial infection) Interacts with Murid herpesvirus 1 protein RIR1. (Microbial infection) Interacts (via RIP homotypic interaction motif) with herpes simplex virus 1/HHV-1 protein RIR1/ICP6 (via RIP homotypic interaction motif); this interaction prevents necroptosis activation. (Microbial infection) Interacts (via RIP homotypic interaction motif) with herpes simplex virus 2/HHV-2 protein RIR1/ICP10 (via RIP homotypic interaction motif); this interaction prevents necroptosis activation.

    Molecular function

    Kinase, Serine/threonine-protein kinase, Transferase

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