Nucleolar protein 3 - Q9D1X0 (NOL3_MOUSE)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

Apoptosis repressor that blocks multiple modes of cell death. Inhibits extrinsic apoptotic pathways through two different ways. Firstly by interacting with FAS and FADD upon FAS activation blocking death-inducing signaling complex (DISC) assembly (By similarity). Secondly by interacting with CASP8 in a mitochondria localization- and phosphorylation-dependent manner, limiting the amount of soluble CASP8 available for DISC-mediated activation (By similarity). Inhibits intrinsic apoptotic pathway in response to a wide range of stresses, through its interaction with BAX resulting in BAX inactivation, preventing mitochondrial dysfunction and release of pro-apoptotic factors (PubMed:16505176) (PubMed:24312627). Inhibits calcium-mediated cell death by functioning as a cytosolic calcium buffer, dissociating its interaction with CASP8 and maintaining calcium homeostasis (By similarity). Negatively regulates oxidative stress-induced apoptosis by phosphorylation-dependent suppression of the mitochondria-mediated intrinsic pathway, by blocking CASP2 activation and BAX translocation (By similarity). Negatively regulates hypoxia-induced apoptosis in part by inhibiting the release of cytochrome c from mitochondria in a caspase-independent manner (By similarity). Also inhibits TNF-induced necrosis by preventing TNF-signaling pathway through TNFRSF1A interaction abrogating the recruitment of RIPK1 to complex I (PubMed:24440909). Finally through its role as apoptosis repressor, promotes vascular remodeling through inhibition of apoptosis and stimulation of proliferation, in response to hypoxia (PubMed:22082675). Inhibits too myoblast differentiation through caspase inhibition (By similarity). UniProt
Pathway Maps
      ESCHER  BiGG
Subunit Structure
Oligomerizes (via CARD doamin) (By similarity). Interacts (via CARD domain) with CASP2; inhibits CASP2 activity in a phosphorylation-dependent manner (By similarity). Interacts with CASP8; decreases CASP8 activity in a mitochondria localization- and phosphorylation-dependent manner and this interaction is dissociated by calcium. Interacts with TFPT; translocates NOL3 into the nucleus and negatively regulated TFPT-induced cell death (By similarity). Interacts directly (via CARD domain) with FAS and FADD (via DED domain); inhibits death-inducing signaling complex (DISC) assembly by inhibiting the increase in FAS-FADD binding induced by FAS activation. Interacts (via CARD domain) with BAX (via a C-terminal 33 residues); inhibits BAX activation and translocation and consequently cytochrome c release from mitochondria. Interacts with PPM1G; may dephosphorylate NOL3 (By similarity). Interacts (via CARD domain) with BBC3 (via BH3 domain); preventing the association of BBC3 with BCL2 and resulting in activation of CASP8 (By similarity). Interacts (via CARD domain) with BAD(via BH3 domain); preventing the association of BAD with BCL2 (By similarity). Interacts directly (via CARD domain) with TNFRSF1A; inhibits TNF-signaling pathway. UniProt
CARD is critical for both extrinsic and intrinsic apoptotic pathways (By similarity). CARD domain mediates a protective effect against myocardial ischemia/reperfusion, oxidative stress and TNF-induced necrosis (PubMed:24440909). The calcium binding domain plays a protective role in calcium-mediated cell death (By similarity). UniProt
  • Other Gene names: Nol3, Arc
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Data in orange originates from the SCOP   (version 1.75) and SCOPe   (version 2.04) classifications.
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The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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