Subtopic Deep Dive

Caveolin in Cell Signaling
Research Guide

What is Caveolin in Cell Signaling?

Caveolin serves as a scaffolding protein that organizes preassembled signaling complexes within caveolae membrane domains to regulate pathways such as MAPK and PI3K.

Caveolin-1 recruits signaling molecules like Ras and G proteins into lipid raft-rich caveolae for spatial control of signal transduction (Okamoto et al., 1998; 1503 citations). Cholesterol modulation and caveolin phosphorylation fine-tune these complexes (Song et al., 1996; 999 citations). Over 10 key papers from 1993-2013 detail interactions with >900 citations each.

Curated Papers

Key Challenges

Why It Matters

Caveolin scaffolding enables precise receptor crosstalk in endothelial cells, impacting vascular function (Aird, 2007; 1676 citations). Disrupting caveolae alters transporter signaling like renal Oat3, affecting drug clearance (Srimaroeng et al., 2013; 2993 citations). These mechanisms influence TGF-β pathway turnover via endocytic regulation (Di Guglielmo et al., 2003; 1153 citations), with applications in endothelial heterogeneity and nitric oxide signaling (Michel and Féron, 1997; 1014 citations).

Key Research Challenges

Quantifying Caveolin Interactions

Identifying specific protein ligands for caveolin scaffolding domain remains challenging due to transient binding (Couët et al., 1997; 914 citations). Biochemical isolation of complexes from lipid rafts complicates validation (Sargiacomo et al., 1993; 956 citations). Over 900-citation papers highlight need for advanced binding assays.

Cholesterol Raft Disruption Effects

Disrupting lipid rafts with cholesterol agents alters signaling but lacks causal specificity (Pike, 2003; 1125 citations). Renal Oat3 function changes post-disruption link cytoskeleton involvement unclearly (Srimaroeng et al., 2013; 2993 citations). Studies demand better modulators.

Pathway Crosstalk Mechanisms

Caveolin organizes Ras-caveolin complexes, yet MAPK-PI3K crosstalk details are unresolved (Song et al., 1996; 999 citations). Endocytic sorting of TGF-β receptors via caveolae needs phosphorylation mapping (Di Guglielmo et al., 2003; 1153 citations). Spatial dynamics require live imaging.

Essential Papers

Regulation of Renal Organic Anion Transporter 3 (SLC22A8) Expression and Function by the Integrity of Lipid Raft Domains and their Associated Cytoskeleton

Chutima Srimaroeng, Jennifer Perry Cecile, Ramsey Walden et al. · 2013 · Cellular Physiology and Biochemistry · 3.0K citations

We have demonstrated that renal Oat3 resides in LRD-rich membranes in proximity to cytoskeletal and signaling proteins. Disruption of LRD-rich membranes by cholesterol-binding agents or protein tra...

Phenotypic Heterogeneity of the Endothelium

William C. Aird · 2007 · Circulation Research · 1.7K citations

Endothelial cells, which form the inner cellular lining of blood vessels and lymphatics, display remarkable heterogeneity in structure and function. This is the first of a 2-part review focused on ...

Caveolins, a Family of Scaffolding Proteins for Organizing “Preassembled Signaling Complexes” at the Plasma Membrane

Takashi Okamoto, Amnon Schlegel, Philipp E. Scherer et al. · 1998 · Journal of Biological Chemistry · 1.5K citations

Caveolae are vesicular invaginations of the plasma membrane. The chief structural proteins of caveolae are the caveolins. Caveolins form a scaffold onto which many classes of signaling molecules ca...

Distinct endocytic pathways regulate TGF-β receptor signalling and turnover

Gianni M. Di Guglielmo, Christine Le Roy, Anne F. Goodfellow et al. · 2003 · Nature Cell Biology · 1.2K citations

Lipid rafts: bringing order to chaos

Linda J. Pike · 2003 · Journal of Lipid Research · 1.1K citations

Lipid rafts are subdomains of the plasma membrane that contain high concentrations of cholesterol and glycosphingolipids. They exist as distinct liquid-ordered regions of the membrane that are resi...

Nitric oxide synthases: which, where, how, and why?

Thomas Michel, Olivier Féron · 1997 · Journal of Clinical Investigation · 1.0K citations

Ca 2 ϩ i ], intracellular Ca 2 ϩ concentration; NO, nitric oxide; NOS, NO synthase.2.Where possible, references in support of introductory material will cite recent review articles rather than the ...

Caveolins, Liquid-Ordered Domains, and Signal Transduction

Eric J. Smart, Gregory A. Graf, Mark A. McNiven et al. · 1999 · Molecular and Cellular Biology · 1.0K citations

Caveolae were originally identified as flask-shaped invaginations of the plasma membrane in endothelial and epithelial cells (14). Prior to the development of biochemical methods for their purifica...

Reading Guide

Foundational Papers

Start with Okamoto et al. (1998; 1503 citations) for scaffolding definition, then Song et al. (1996; 999 citations) for Ras co-purification, and Sargiacomo et al. (1993; 956 citations) for complex isolation methods.

Recent Advances

Srimaroeng et al. (2013; 2993 citations) on raft disruption in transporters; Di Guglielmo et al. (2003; 1153 citations) on TGF-β endocytosis; Pike (2003; 1125 citations) on raft organization.

Core Methods

Triton X-100 fractionation for insoluble complexes (Sargiacomo et al., 1993); peptide-binding assays for ligands (Couët et al., 1997); cholesterol depletion with methyl-β-cyclodextrin for raft studies (Pike, 2003).

How PapersFlow Helps You Research Caveolin in Cell Signaling

Discover & Search

Research Agent uses citationGraph on Okamoto et al. (1998; 1503 citations) to map caveolin scaffolding connections, revealing clusters with Song et al. (1996) and Couët et al. (1997). exaSearch queries 'caveolin phosphorylation signaling caveolae' for 250M+ OpenAlex papers, while findSimilarPapers expands from Pike (2003) lipid rafts work.

Analyze & Verify

Analysis Agent applies readPaperContent to extract Ras-caveolin interactions from Song et al. (1996), then verifyResponse with CoVe chain-of-verification against Sargiacomo et al. (1993). runPythonAnalysis processes citation networks with pandas for raft-signaling co-occurrence stats; GRADE scores evidence strength for cholesterol modulation claims.

Synthesize & Write

Synthesis Agent detects gaps in caveolin-MAPK crosstalk from Okamoto et al. (1998) and Di Guglielmo et al. (2003), flagging contradictions in raft roles. Writing Agent uses latexEditText for signaling diagrams, latexSyncCitations to integrate 10+ papers, and latexCompile for publication-ready reviews; exportMermaid visualizes caveolae complex hierarchies.

Use Cases

"Analyze cholesterol disruption effects on caveolin signaling from Srimaroeng 2013 using stats."

Research Agent → searchPapers 'Oat3 caveolin lipid rafts' → Analysis Agent → readPaperContent + runPythonAnalysis (pandas quantify expression changes) → statistical plot output with p-values.

"Draft LaTeX review on caveolin-Ras interactions citing Okamoto 1998 and Song 1996."

Synthesis Agent → gap detection across papers → Writing Agent → latexEditText (scaffold section) → latexSyncCitations + latexCompile → PDF with caveolae diagram.

"Find code for caveolin phosphorylation simulation models from recent papers."

Research Agent → paperExtractUrls on Smart et al. (1999) → Code Discovery → paperFindGithubRepo → githubRepoInspect → runnable Python scripts for signaling kinetics.

Automated Workflows

Deep Research workflow scans 50+ caveolin papers via searchPapers → citationGraph → structured report on signaling complexes (Okamoto et al., 1998). DeepScan applies 7-step CoVe analysis to verify raft disruption in Srimaroeng et al. (2013), with GRADE checkpoints. Theorizer generates hypotheses on caveolin-PI3K crosstalk from Lisanti-linked papers.

Try Doxa for Caveolin in Cell Signaling Research

Frequently Asked Questions

What defines caveolin's role in cell signaling?

Caveolin acts as a scaffolding protein organizing preassembled complexes in caveolae for signaling molecules like Ras and G proteins (Okamoto et al., 1998; 1503 citations).

What methods study caveolin signaling complexes?

Triton-insoluble fractionation isolates caveolin-rich complexes (Sargiacomo et al., 1993; 956 citations); peptide ligands identified via binding assays (Couët et al., 1997; 914 citations).

What are key papers on caveolin signaling?

Okamoto et al. (1998; 1503 citations) define scaffolding; Song et al. (1996; 999 citations) detail Ras interaction; Smart et al. (1999; 1003 citations) link to liquid-ordered domains.

What open problems exist in caveolin signaling?

Unresolved: precise phosphorylation sites regulating complex assembly; causal role of cholesterol in pathway crosstalk beyond disruption assays (Pike, 2003; 1125 citations).