Tomato Bushy Stunt Virus Model

Description

Rendered as a non-enveloped icosahedral virion, the tomato bushy stunt virus (Tombusvirus) capsid is presented as a near-spherical shell built from repeating capsid protein subunits arranged into pentameric and hexameric capsomeres. Knobby surface protrusions correspond to the exposed (P) domains that sit peripheral to the contiguous shell (S) domains, creating a textured outer contour while maintaining strict icosahedral symmetry. Color mapping in blue and green differentiates subunit groupings across the capsid lattice and helps track quasi-equivalent positions typical of a T=3 assembly. No membrane is present. Only protein architecture dominates the surface. Capsid topology matters because tombusviruses depend on precise assembly and stability to persist in the environment and to traffic within plant tissues, and small changes at inter-subunit interfaces can alter host range, particle robustness, and transmission efficiency. The protruding domains represent the most accessible antigenic and receptor-interaction surfaces, the same regions often interrogated in cryo-EM reconstructions, epitope mapping, and mutagenesis studies that probe how the particle binds host factors and packages its RNA genome. For teaching, this model clarifies a frequent point of confusion: icosahedral symmetry does not mean identical local environments at every subunit. Place this figure in plant virology and structural biology modules to anchor discussions of T-number geometry, capsomere organization, and non-enveloped virus stability relative to enveloped particles. It also fits cleanly into journal figures and grant schematics on Tombusviridae assembly, capsid-targeting antivirals for experimental systems, or agricultural pathology content addressing tomato bushy stunt disease and related crop-impacting infections. Anatomical accuracy verified by SciePro's Medical Advisory Board.