Normal mode analysis of Zika virus.

Area of Science:

• * Virology
• * Structural Biology
• * Computational Biophysics

Background:

• * Zika virus (ZIKV) poses a global health threat due to its association with microcephaly.
• * Limited understanding of ZIKV's fundamental viral features and infection mechanisms.
• * Recent cryo-electron microscopy revealed the mature ZIKV icosahedral shell structure.

Purpose of the Study:

• * To analyze the dynamic properties of ZIKV from a mechanical perspective using simulations.
• * To investigate the intrinsic vibrational motions and basic properties of ZIKV's structure.
• * To gain insights into ZIKV's biological functions and infection mechanisms.

Main Methods:

• * Performed normal mode analysis (NMA) on a dimeric unit structure of ZIKV (envelope and membrane proteins).
• * Utilized icosahedral symmetry for efficient simulation of the entire ZIKV shell structure.
• * Analyzed low-frequency normal modes to capture intrinsic vibrational motions.

Main Results:

• * Captured intrinsic vibrational motions and defined basic vibrational properties of the ZIKV unit structure.
• * Simulated the entire ZIKV shell structure with reduced computational cost.
• * Identified highly mobile glycosylation sites, supporting their importance in ZIKV function.

Conclusions:

• * NMA provides a method to comprehend ZIKV's dynamic fluctuations.
• * The study offers insights into the mechanical properties influencing ZIKV's biological functions.
• * Findings contribute to understanding ZIKV's infection mechanism and potential therapeutic targets.