title: Identification and biological consequences of the O-GlcNAc modification of the human innate immune receptor, Nod2.
abstract: Nucleotide-binding oligomerization domain 2 (Nod2) is an intracellular receptor that can sense the bacterial peptidoglycan component, muramyl dipeptide. Upon activation, Nod2 induces the production of various inflammatory molecules such as cytokines and chemokines. Genetic linkage analysis identified and revealed three major mutations in Nod2 that are associated with the development of Crohn's disease. The objective of this study is to further characterize this protein by determining whether Nod2 is posttranslationally modified by O-N-acetylglucosamine (O-GlcNAc). O-GlcNAcylation is one type of posttranslational modification in which the O-GlcNAc transferase transfers GlcNAc from UDP-GlcNAc to selected serine and threonine residues of intracellular proteins. We found that wild-type Nod2 and a Nod2 Crohn's-associated variant are O-GlcNAcylated and this modification affects Nod2's ability to signal via the nuclear factor kappa B pathway.
authors.affiliation: Department of Chemistry and Biochemistry.
authors.forename: Ching-Wen
authors.initials: CW
authors.lastname: Hou
authors.affiliation: Department of Biological Sciences, University of Delaware, Newark, DE 19716, USA.
authors.forename: Vishnu
authors.initials: V
authors.lastname: Mohanan
authors.affiliation: Department of Biological Chemistry, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
authors.forename: Natasha E
authors.initials: NE
authors.lastname: Zachara
authors.affiliation: Department of Chemistry and Biochemistry Department of Biological Sciences, University of Delaware, Newark, DE 19716, USA cgrimes@udel.edu.
authors.forename: Catherine Leimkuhler
authors.initials: CL
authors.lastname: Grimes
mesh_terms: D000117:Acetylglucosamine / Q000378:metabolism*; D006031:Glycosylation; D045325:HCT116 Cells; D057809:HEK293 Cells; D006801:Humans; D009154:Mutation; D016328:NF-kappa B / Q000378:metabolism; D053473:Nod2 Signaling Adaptor Protein / Q000235:genetics / Q000378:metabolism*; D011499:Protein Processing, Post-Translational
chemical_list: D016328:NF-kappa B; C429018:NOD2 protein, human; D053473:Nod2 Signaling Adaptor Protein; D000117:Acetylglucosamine
keywords: Crohn's disease; NF-κB; Nod2; O-GlcNAcylation; OGT