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Related Experiment Video

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A Guide to Production, Crystallization, and Structure Determination of Human IKK1/α

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A function for AAMP in Nod2-mediated NF-kappaB activation.

H Bielig¹, B Zurek, A Kutsch

¹Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Germany.

Molecular Immunology

|June 19, 2009

Summary

This summary is machine-generated.

Angio-associated migratory cell protein (AAMP) binds Nod2, a key innate immune receptor. AAMP regulates Nod2- and Nod1-mediated immune signaling, revealing a novel role in innate immunity.

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Oligopeptide Competition Assay for Phosphorylation Site Determination

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Area of Science:

Immunology
Molecular Biology
Cell Biology

Background:

The nucleotide-binding domain, leucine rich repeat containing (NLR) proteins, such as Nod2, are crucial sensors in the innate immune system.
Understanding Nod2-interacting proteins is vital for elucidating innate immune pathways.

Purpose of the Study:

To identify novel binding partners of Nod2.
To investigate the functional role of angio-associated migratory cell protein (AAMP) in Nod2-mediated signaling.

Main Methods:

Yeast two-hybrid screening to identify protein interactions.
Co-immunoprecipitation assays to confirm AAMP-Nod2 interaction in human cells.
Overexpression and siRNA knock-down experiments to assess AAMP's functional impact.
NF-kappaB reporter assays to measure immune activation.

Main Results:

Angio-associated migratory cell protein (AAMP), characterized by WD40 repeats, was identified as a novel binding partner of human Nod2.
The interaction between AAMP and Nod2 was validated through co-immunoprecipitation, with a specific AAMP peptide sufficient for binding.
AAMP is ubiquitously expressed and primarily localized in the cytosol of epithelial cells.
AAMP was found to modulate both Nod1- and Nod2-mediated NF-kappaB activation.

Conclusions:

AAMP plays a significant role in regulating innate immune responses.
AAMP acts as a modulator of signaling pathways initiated by NLR proteins, specifically Nod2 and Nod1.
This study uncovers a new function for AAMP in the context of innate immunity and Nod2 signaling.