Subtopic Deep Dive

Caspase-1 Structure and Regulation
Research Guide

What is Caspase-1 Structure and Regulation?

Caspase-1 structure and regulation encompasses the inflammasome-induced dimerization, autocatalytic activation, allosteric modulation, and inhibitor design targeting this cysteine protease central to IL-1β processing.

Caspase-1 activates via proximity-induced dimerization within inflammasomes like NLRP3, leading to autocleavage and maturation (Martinon et al., 2002; 5880 citations). Regulation involves allosteric sites and zymogen control, with cryo-EM revealing inhibitor binding modes (McIlwain et al., 2013; 2520 citations). Over 20 key papers detail mechanisms linking structure to pyroptosis and immune disorders.

Curated Papers

Key Challenges

Why It Matters

Caspase-1 inhibitors target cryopyrinopathies by blocking IL-1β maturation, offering alternatives to biologics like anakinra (Kelley et al., 2019). Structures guide selective inhibitor design, reducing off-target effects in gout and CAPS (Martinon et al., 2006; 5122 citations). Dysregulation drives NLRP3-related diseases, with GSDMD cleavage enabling pyroptosis therapies (Shi et al., 2015; 6153 citations).

Key Research Challenges

Allosteric Site Identification

Mapping transient allosteric pockets on caspase-1 zymogen hinders inhibitor optimization (McIlwain et al., 2013). Cryo-EM captures conformations, but dynamic regulation evades full resolution (Lamkanfi and Dixit, 2014; 2408 citations). Selective binding without disrupting autocatalysis remains unsolved.

Dimerization Mechanism Elucidation

Inflammasome proximity triggers dimerization, but exact interfaces vary by sensor (Martinon et al., 2002). Mutations alter activation thresholds in diseases like CAPS (Muñoz-Planillo et al., 2013; 2044 citations). Modeling non-canonical paths challenges predictions.

Inhibitor Selectivity Development

Pan-caspase inhibitors lack specificity over caspase-3/8, causing toxicity (McIlwain et al., 2013). NLRP3-specific regulation complicates caspase-1 targeting (He et al., 2016; 2595 citations). Clinical translation fails due to poor pharmacokinetics.

Essential Papers

NF-κB signaling in inflammation

Ting Liu, Lingyun Zhang, Donghyun Joo et al. · 2017 · Signal Transduction and Targeted Therapy · 7.7K citations

Cleavage of GSDMD by inflammatory caspases determines pyroptotic cell death

Jianjin Shi, Yue Zhao, Kun Wang et al. · 2015 · Nature · 6.2K citations

The Inflammasome

Fabio Martinon, Kimberly Burns, Jürg Tschopp · 2002 · Molecular Cell · 5.9K citations

Gout-associated uric acid crystals activate the NALP3 inflammasome

Fabio Martinon, Virginie Pétrilli, Annick Mayor et al. · 2006 · Nature · 5.1K citations

Inflammatory responses and inflammation-associated diseases in organs

Linlin Chen, Huidan Deng, Hengmin Cui et al. · 2017 · Oncotarget · 4.7K citations

Inflammation is a biological response of the immune system that can be triggered by a variety of factors, including pathogens, damaged cells and toxic compounds. These factors may induce acute and/...

The NLRP3 Inflammasome: An Overview of Mechanisms of Activation and Regulation

Nathan Kelley, Devon Jeltema, Yanhui Duan et al. · 2019 · International Journal of Molecular Sciences · 3.2K citations

The NLRP3 inflammasome is a critical component of the innate immune system that mediates caspase-1 activation and the secretion of proinflammatory cytokines IL-1β/IL-18 in response to microbial inf...

Inflammasomes: mechanism of action, role in disease, and therapeutics

Haitao Guo, Justin Callaway, Jenny P.-Y. Ting · 2015 · Nature Medicine · 3.1K citations

Reading Guide

Foundational Papers

Start with Martinon et al. (2002; 5880 citations) for inflammasome basics and caspase-1 role; McIlwain et al. (2013; 2520 citations) for zymogen structure and functions.

Recent Advances

Kelley et al. (2019; 3225 citations) for NLRP3 regulation overview; Shi et al. (2015; 6153 citations) for GSDMD-caspase-1 pyroptosis mechanism.

Core Methods

Cryo-EM for structures (implied in recent works); K+ efflux assays (Muñoz-Planillo et al., 2013); mutagenesis and inhibitor binding (Lamkanfi and Dixit, 2014).

How PapersFlow Helps You Research Caspase-1 Structure and Regulation

Discover & Search

Research Agent uses citationGraph on Martinon et al. (2002; 5880 citations) to map caspase-1 activation pathways, revealing NLRP3 links; exaSearch queries 'caspase-1 cryo-EM structures' for 50+ recent preprints beyond the 250M OpenAlex corpus.

Analyze & Verify

Analysis Agent runs readPaperContent on Shi et al. (2015) to extract GSDMD cleavage sites, then verifyResponse with CoVe against McIlwain et al. (2013) for GRADE A evidence on zymogen regulation; runPythonAnalysis computes dimerization kinetics from structural data via NumPy.

Synthesize & Write

Synthesis Agent detects gaps in allosteric inhibitor coverage across papers, flagging NLRP3-specific voids; Writing Agent applies latexEditText to draft mechanisms, latexSyncCitations for 20+ refs, and latexCompile for publication-ready reviews with exportMermaid pyroptosis diagrams.

Use Cases

"Analyze caspase-1 dimerization kinetics from cryo-EM data in recent papers"

Research Agent → searchPapers('caspase-1 cryo-EM') → Analysis Agent → runPythonAnalysis(pandas on PDB coordinates) → matplotlib plots of activation rates.

"Write LaTeX review on caspase-1 inhibitors for cryopyrinopathies"

Synthesis Agent → gap detection → Writing Agent → latexEditText(structure section) → latexSyncCitations(Shi 2015 et al.) → latexCompile(PDF with figures).

"Find GitHub code for caspase-1 simulation models"

Research Agent → paperExtractUrls(He 2016) → Code Discovery → paperFindGithubRepo → githubRepoInspect(downloads molecular dynamics scripts).

Automated Workflows

Deep Research workflow scans 50+ papers via searchPapers on 'caspase-1 regulation NLRP3', generating structured reports with GRADE scores on activation models. DeepScan applies 7-step CoVe to verify GSDMD-pyo links from Shi et al. (2015). Theorizer hypothesizes novel allosteric sites from Martinon (2002) + recent structures.

Try Doxa for Caspase-1 Structure and Regulation Research

Frequently Asked Questions

What defines caspase-1 activation?

Inflammasome-induced dimerization triggers autocatalytic cleavage of the zymogen (Martinon et al., 2002; McIlwain et al., 2013).

What methods study caspase-1 structure?

Cryo-EM resolves dimers; mutagenesis tests interfaces; inhibitors probe allostery (Shi et al., 2015; Lamkanfi and Dixit, 2014).

What are key papers on caspase-1 regulation?

Martinon et al. (2002; 5880 citations) defines inflammasomes; McIlwain et al. (2013; 2520 citations) details zymogen control; Kelley et al. (2019; 3225 citations) covers NLRP3 links.