Cited by 5Click Chemistry and ApplicationsProtein Interaction Studies and Fluorescence AnalysisAdvanced Proteomics Techniques and Applications

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CLICK-chemoproteomics and molecular dynamics simulation reveals pregnenolone targets and their binding conformations in Th2 cells

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Abstract

Pregnenolone (P5) is synthesized as the first bioactive steroid in the mitochondria from cholesterol. Clusters of differentiation 4 (CD4+) and Clusters of differentiation 8 (CD8+) immune cells synthesize P5 de novo ; P5, in turn, play important role in immune homeostasis and regulation. However, P5’s biochemical mode of action in immune cells is still emerging. We envisage that revealing the complete spectrum of P5 target proteins in immune cells would have multifold applications, not only in basic understanding of steroids biochemistry in immune cells but also in developing new therapeutic applications. We employed a CLICK-enabled probe to capture P5-binding proteins in live T helper cell type 2 (Th2) cells. Subsequently, using high-throughput quantitative proteomics, we identified the P5 interactome in CD4+ Th2 cells. Our study revealed P5’s mode of action in CD4+ immune cells. We identified novel proteins from mitochondrial and endoplasmic reticulum membranes to be the primary mediators of P5’s biochemistry in CD4+ and to concur with our earlier finding in CD8+ immune cells. Applying advanced computational algorithms and molecular simulations, we were able to generate near-native maps of P5–protein key molecular interactions. We showed bonds and interactions between key amino acids and P5, which revealed the importance of ionic bond, hydrophobic interactions, and water channels. We point out that our results can lead to designing of novel molecular therapeutics strategies.

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Metadata

Authors
Roy, S., Roy, S., Mahata, B., Pramanik, J., Hennrich, M. L., Gavin, A.-C., & Teichmann, S. A.
Affiliations
  • Ashoka University (IN)
  • University of Cambridge (GB)
  • European Molecular Biology Laboratory (DE)
  • University of Geneva (CH)
Corresponding author
Roy, Sougata
Venue
Frontiers in Immunology
Published
2023-10-31
Volume
14
Pages
1229703-1229703
ISSN
1664-3224 (ISSN-L)
OpenAlex
W4388047184
Cited by
5
References
3
Citations by year
2026: 1 · 2025: 2 · 2024: 2
FWCI
0.51
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Immunology (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Brno University of Technology Digital Library (Brno University of Technology) (submittedVersion, cc-by)
  • Apollo (University of Cambridge) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
Funders
European Research Council
Topics
  • Physical Sciences › Chemistry › Organic Chemistry › Click Chemistry and Applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Interaction Studies and Fluorescence Analysis
  • Physical Sciences › Chemistry › Spectroscopy › Advanced Proteomics Techniques and Applications
Keywords
pregnenolone, steroid binding proteins, Th2 cells, CD4+ T cells, mitochondrial proteins, endoplasmic reticulum proteins
MeSH terms
Carrier Proteins, Pregnenolone, Steroids, Th2 Cells, Molecular Dynamics Simulation

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