Crowding effects on the structural transitions in a flexible helical homopolymer

Abstract

We elucidate the structural transitions in a helical off-lattice homopolymer induced by crowding agents, as function of the number of monomers ($N$) and volume fraction (${\varphi }_c$) of crowding particles. At ${\varphi }_c=0$, the homopolymer undergoes transitions from a random coil to a helix, helical hairpin \textbf{HH}, and helix bundle \textbf{HB} structures depending on $N$, and temperature. Crowding induces chain compaction that can promote \textbf{HH} or \textbf{HB} formation depending on ${\varphi }_c$. Typically, the helical content decreases which is reflected in the decrease in the transition temperatures that depend on ${\varphi }_c$, $N$, and the size of the crowding particles.

9 pages, 4 figures

References in corpus (2)

• Entropically Driven Helix Formation
• Viscosity Dependence of the Folding Rates of Proteins

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