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Identification of Post-translational Modifications of Plant Protein Complexes
Published on: February 22, 2014
NOD proteins: an intracellular pathogen-recognition system or signal transduction modifiers?
1Department of Infectious Diseases, St. Jude Children's Research Hospital, 332 North Lauderdale, Memphis, TN 38105, USA. peter.murray@stjude.org
Current Opinion in Immunology
|June 14, 2005
Summary
NOD proteins, including NOD2, are intracellular sensors that may detect bacterial components, influencing immune responses. Mutations in NOD2 are linked to Crohn
Area of Science:
- Innate immunity
- Cellular microbiology
- Molecular immunology
Background:
- NOD1 and NOD2 are cytoplasmic proteins with leucine-rich repeats, implicated in pathogen resistance.
- Mutations in NOD2 (Card15) are associated with Crohn's disease, an inflammatory intestinal disorder.
- NOD proteins are proposed to function as intracellular sensors for bacterial components.
Purpose of the Study:
- To investigate the role of NOD proteins in the intracellular sensing of bacteria.
- To explore the potential function of NOD proteins in regulating cellular responses to bacterial fragments.
- To examine the controversy surrounding intracellular bacterial recognition systems and alternative functions of NODs.
Main Methods:
- Analysis of NOD protein structure and similarity to plant pathogen resistance proteins.
- Investigation of NOD protein function in cellular responses to bacterial cell wall fragments.
- Comparison of the proposed NOD intracellular system with extracellular Toll-like receptor pathways.
Main Results:
- NOD proteins appear to modulate cellular responses to bacterial cell wall components.
- The proposed intracellular bacterial sensing system by NODs is analogous to extracellular Toll-like receptors.
- Evidence suggests NOD proteins may regulate signal transduction pathways.
Conclusions:
- NOD proteins are likely involved in intracellular bacterial recognition, contributing to innate immunity.
- Dysfunction in NOD2 may contribute to inflammatory conditions like Crohn's disease.
- Further research is needed to fully elucidate the controversial roles of NOD proteins in immunity and signaling.
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