Glycan Sequence-Dependent Nod2 Activation Investigated by Using a Chemically Synthesized Bacterial Peptidoglycan Fragment Library
Nucleotide oligomerization domain‐containing protein 2 (Nod2), an innate immune receptor, recognizes bacterial cell‐wall peptidoglycan (PGN), the minimum ligand of which is muramyl dipeptide (MDP). Enzymatic digestion of PGN appears to be important for Nod2 recognition. PGN is degraded by muramidase...
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Published in | Chembiochem : a European journal of chemical biology Vol. 14; no. 4; pp. 482 - 488 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
04.03.2013
WILEY‐VCH Verlag Wiley Wiley Subscription Services, Inc |
Subjects | |
Online Access | Get full text |
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Summary: | Nucleotide oligomerization domain‐containing protein 2 (Nod2), an innate immune receptor, recognizes bacterial cell‐wall peptidoglycan (PGN), the minimum ligand of which is muramyl dipeptide (MDP). Enzymatic digestion of PGN appears to be important for Nod2 recognition. PGN is degraded by muramidase or glucosamidase through a process that produces two types of glycan sequence; glycans containing GlcNAcβ(1→4)MurNAc or MurNAcβ(1→4)GlcNAc. In this report, a range of disaccharide or tetrasaccharide fragments of each sequence were chemically synthesized, and their activities in stimulating human Nod2 (hNod2) were investigated. The results reveal that hNod2 recognitions is dependent on the glycan sequence, as demonstrated by comparing the activities of glycans with the same peptide moieties. (MurNAcβ(1→4)GlcNAc)2‐containing structures exhibited stronger activity than those containing (GlcNAcβ(1→4)MurNAc)2. The results suggest that differences in the enzymatic degradation process affect the host's immunomodulation process.
To Nod off or on? Di‐ or tetrasaccharide fragments of muramidase and glucosamidase were chemically synthesized, and their abilities to stimulate human Nod2 were investigated. The results reveal that hNod2 recognition is glycan sequence‐dependent, and suggest that the peptidoglycan degradation process affects the host's immunomodulation. |
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Bibliography: | Naito Foundation istex:5DF0B3432154DE7AC435A9AE7D05AB996C89D5AE ArticleID:CBIC201200655 CSTP Houansha Foundation Takeda Science Foundation ark:/67375/WNG-T7BF2QTK-X Japan Society for the Promotion of Science - No. 23⋅1965; No. 19310144; No. 20241053; No. 22310136 Institute for Fermentation, Osaka (IFO) Suntory Institute for Bioorganic Research Japan Chemical Innovation and Inspection Institute JSPS KAKEN ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 1439-4227 1439-7633 |
DOI: | 10.1002/cbic.201200655 |