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Protamine-Controlled Reversible DNA Packaging: A Molecular Glue

Title
Protamine-Controlled Reversible DNA Packaging: A Molecular Glue
Author(s)
Mukherjee, ArnabIzarra, Ambroise deDegrouard, JerilOlive, EnrickMaiti, Prabal K.Jang, Yun HeeLansac, Yves
Issued Date
2021-08
Citation
ACS Nano, v.15, no.8, pp.13094 - 13104
Type
Article
Author Keywords
molecular dynamics simulationDNA packagingprotamineself-assemblyredissolution
Keywords
MESSENGER-RNA VACCINESCHARGE INVERSIONPHASE-SEPARATIONINDUCED CONDENSATIONSPERM CELLSBLUE PHASEPROTEINTRANSITIONPOLYAMINESDELIVERY
ISSN
1936-0851
Abstract
Packaging paternal genome into tiny sperm nuclei during spermatogenesis requires 106-fold compaction of DNA, corresponding to a 10-20 times higher compaction than in somatic cells. While such a high level of compaction involves protamine, a small arginine-rich basic protein, the precise mechanism at play is still unclear. Effective pair potential calculations and large-scale molecular dynamics simulations using a simple idealized model incorporating solely electrostatic and steric interactions clearly demonstrate a reversible control on DNA condensates formation by varying the protamine-to-DNA ratio. Microscopic states and condensate structures occurring in semidilute solutions of short DNA fragments are in good agreement with experimental phase diagram and cryoTEM observations. The reversible microscopic mechanisms induced by protamination modulation should provide valuable information to improve a mechanistic understanding of early and intermediate stages of spermatogenesis where an interplay between condensation and liquid-liquid phase separation triggered by protamine expression and post-translational regulation might occur. Moreover, recent vaccines to prevent virus infections and cancers using protamine as a packaging and depackaging agent might be fine-tuned for improved efficiency using a protamination control. © 2021 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/15365
DOI
10.1021/acsnano.1c02337
Publisher
American Chemical Society
Related Researcher
  • 장윤희 Jang, Yun Hee
  • Research Interests Multiscale molecular modeling (quantum mechanics calculation; molecular dynamics simulation) : Supercomputer-assisted molecular-level understanding of materials and their chemistry; which leads to rational design of high-performance organic-inorganic-hybrid materials for clean and renewable energy as well as low-energy-consumption electronic devices
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Department of Energy Science and Engineering CMMM Lab(Curious Minds Molecular Modeling Laboratory) 1. Journal Articles

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