Related Experiment Video
Updated: Jan 22, 2026
08:52
Stomata Tape-Peel: An Improved Method for Guard Cell Sample Preparation
Published on: July 15, 2018
15.7K
NLRP1 - One NLR to guard them all
Carolyn A Lacey1, Edward A Miao1
1Department of Microbiology and Immunology, Center for Gastrointestinal Biology and Disease, and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
The EMBO Journal
|July 4, 2019
Summary
The NLRP1 inflammasome sensor is activated by anthrax lethal toxin. This cleavage triggers its degradation, but a fragment escapes to form an active inflammasome.
Area of Science:
- Cellular Biology
- Immunology
- Microbiology
Background:
- Inflammasomes are crucial intracellular sensors detecting microbial pathogens and cellular damage.
- NLRP1 is an inflammasome sensor known to detect anthrax lethal toxin, but its activation mechanism was unclear.
Purpose of the Study:
- To elucidate the molecular mechanism by which anthrax lethal toxin activates the NLRP1 inflammasome.
Main Methods:
- Investigated the interaction between anthrax lethal toxin and NLRP1.
- Utilized biochemical assays and proteasomal degradation studies.
Main Results:
- Anthrax lethal toxin cleaves NLRP1, initiating its degradation via the N-end rule pathway.
- A surprising finding is that the cleaved NLRP1 fragment evades proteasomal degradation and forms an active inflammasome complex.
Conclusions:
- NLRP1 activation by anthrax lethal toxin involves a unique mechanism of regulated degradation and subsequent functional activation.
- This discovery sheds light on inflammasome regulation and host defense against bacterial toxins.
