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On 22 marzo 2025 22:48:30 UTC, Gravatar Marco Lamorte:
  • Updated description of resource 2024_Man Nguyen Thi Hong in PREPRINTS WITH DOI from

    **Title:** Molecular Dynamics Simulations Unveil the Aggregation Patterns and Salting Out of Polyarginines at Zwitterionic POPC Bilayers in Solutions of Various Ionic Strengths. **Author(s):** Man Nguyen Thi Hong, Mario Vazdar. **DOI:** 10.1101/2024.04.24.590968 **Publication Date:** April 24, 2024. **Resource Type:** Preprint (DOI provided). **Format:** PDF. **Working Group:** WG2. **Affiliation:** Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic; University of Chemistry and Technology, Prague, Czech Republic. **Open Access:** Yes. **Keywords:** Molecular dynamics, Polyarginines, Cell-penetrating peptides, Salting-out, POPC membranes, Peptide aggregation. **Description:** This preprint investigates the adsorption and aggregation behavior of polyarginine cell-penetrating peptides (CPPs), specifically modeled as R9 peptides, at zwitterionic phosphocholine (POPC) membranes under varying ionic strengths. Using molecular dynamics (MD) simulations, the study reveals an intriguing **salting-out effect**, where peptide aggregation at the membrane increases with peptide concentration and ionic strength. Larger aggregates, such as octamers, are observed in high ionic strength conditions, suggesting a significant impact on CPP translocation across cellular membranes. The results indicate that the unique properties of arginine, particularly its amphiphilic guanidinium (Gdm+) side chain, drive aggregation dynamics through hydrophobic-like Gdm+ – Gdm+ and salt-bridge Gdm+ – C-terminus interactions. This research contributes to the understanding of CPP membrane interactions and their potential role in translocation mechanisms.
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    **Title:** Molecular Dynamics Simulations Unveil the Aggregation Patterns and Salting Out of Polyarginines at Zwitterionic POPC Bilayers in Solutions of Various Ionic Strengths. **Author(s):** Man Nguyen Thi Hong, Mario Vazdar. **DOI:** 10.1101/2024.04.24.590968 **Publication Date:** April 24, 2024. **Resource Type:** Preprint (DOI provided). **Format:** PDF. **Working Group:** WG2. **Affiliation:** Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic; University of Chemistry and Technology, Prague, Czech Republic. **Open Access Status:** Open. **Keywords:** Molecular dynamics, Polyarginines, Cell-penetrating peptides, Salting-out, POPC membranes, Peptide aggregation. **Description:** This preprint investigates the adsorption and aggregation behavior of polyarginine cell-penetrating peptides (CPPs), specifically modeled as R9 peptides, at zwitterionic phosphocholine (POPC) membranes under varying ionic strengths. Using molecular dynamics (MD) simulations, the study reveals an intriguing **salting-out effect**, where peptide aggregation at the membrane increases with peptide concentration and ionic strength. Larger aggregates, such as octamers, are observed in high ionic strength conditions, suggesting a significant impact on CPP translocation across cellular membranes. The results indicate that the unique properties of arginine, particularly its amphiphilic guanidinium (Gdm+) side chain, drive aggregation dynamics through hydrophobic-like Gdm+ – Gdm+ and salt-bridge Gdm+ – C-terminus interactions. This research contributes to the understanding of CPP membrane interactions and their potential role in translocation mechanisms.