lmmol · Proteins

Nucleotide-binding oligomerization domain-containing protein 1

UniProt Q9Y239 Organism Homo sapiens Gene CARD4, NOD1

Also known as: CARD4, NOD1

Function

Pattern recognition receptor (PRR) that detects bacterial peptidoglycan fragments and other danger signals and thus participates in both innate and adaptive immune responses. Specifically recognizes and binds gamma-D-glutamyl-meso-diaminopimelic acid (iE-DAP), a dipeptide present in peptidoglycan of Gram-negative bacteria. Preferentially binds iE-DAP in tripeptide-containing muropeptides (MurNAc-TriDAP or TriDAP). Ligand binding triggers oligomerization that facilitates the binding and subsequent activation of the proximal adapter receptor-interacting RIPK2. Following recruitment, RIPK2 undergoes 'Met-1'- (linear) and 'Lys-63'-linked polyubiquitination by E3 ubiquitin-protein ligases XIAP, BIRC2, BIRC3 and the LUBAC complex, becoming a scaffolding protein for downstream effectors, triggering activation of the NF-kappa-B and MAP kinases signaling. This in turn leads to the transcriptional activation of hundreds of genes involved in immune response. Also acts as a regulator of antiviral response elicited by dsRNA and the expression of RLR pathway members by targeting IFIH1 and TRAF3 to modulate the formation of IFIH1-MAVS and TRAF3-MAVS complexes leading to increased transcription of type I IFNs. Also acts as a regulator of autophagy via its interaction with ATG16L1, possibly by recruiting ATG16L1 at the site of bacterial entry (By similarity). Besides recognizing pathogens, also involved in the endoplasmic reticulum stress response: acts by sensing and binding to the cytosolic metabolite sphingosine-1-phosphate generated in response to endoplasmic reticulum stress, initiating an inflammation process that leads to activation of the NF-kappa-B and MAP kinases signaling. In addition, plays a role in insulin trafficking in beta cells in a cell-autonomous manner (By similarity). Mechanistically, upon recognizing cognate ligands, NOD1 and RIPK2 localize to insulin vesicles where they recruit RAB1A to direct insulin trafficking through the cytoplasm (By similarity).

Classification

Family (Pfam)
PF00619 CARD, PF13516 LRR_6, PF05729 NACHT, PF17776 NLRC4_HD2, PF17779 WHD_NOD2
InterPro
CARD, DEATH-like_dom_sf, Leu-rich_rpt, LRR_dom_sf, NACHT_NTPase, NLR, NLRP_HD2, NOD1/2_WH, P-loop_NTPase
Functional cluster
Eukaryotic Transcription Factors & related

Experimental structures · PDB · 6

A predicted model is available from AlphaFold.

Gene Ontology · 37

Neighborhood · nearest proteins

CARD4Nod1Card15NOD2CARD15CARDIAKRNF34
Nearest neighbours of Nucleotide-binding oligomerization domain-containing protein 1: 3 by sequence/function similarity (left); 3 co-cited in the literature (right).

Related proteins · sequence + function similarity

Co-cited proteins · studied together in the literature

Literature · 29 cited papers

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