NOD-like receptor
Class of proteins / From Wikipedia, the free encyclopedia
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The nucleotide-binding oligomerization domain-like receptors, or NOD-like receptors (NLRs) (also known as nucleotide-binding leucine-rich repeat receptors),[1] are intracellular sensors of pathogen-associated molecular patterns (PAMPs) that enter the cell via phagocytosis or pores, and damage-associated molecular patterns (DAMPs) that are associated with cell stress. They are types of pattern recognition receptors (PRRs),[2] and play key roles in the regulation of innate immune response. NLRs can cooperate with toll-like receptors (TLRs) and regulate inflammatory and apoptotic response.
NLRs primarily recognize Gram-positive bacteria, whereas TLRs primarily recognize Gram-negative bacteria. They are found in lymphocytes, macrophages, dendritic cells and also in non-immune cells, for example in epithelium.[3] NLRs are highly conserved through evolution. Their homologs have been discovered in many different animal species (APAF1)[4][5] and also in the plant kingdom (disease-resistance R protein).[5]