Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
Capsomeres are the protein subunits that make up the capsid, or outer protein coat, of a virus. They play a critical role in protecting viral genetic material and aiding in the attachment and entry into host cells.
5 Must Know Facts For Your Next Test
Capsomeres self-assemble to form the capsid, providing structural integrity to viruses.
The arrangement and number of capsomeres can vary significantly between different types of viruses.
Capsomeres are crucial for viral infectivity as they facilitate the initial interaction with host cell receptors.
They can be composed of identical or different proteins depending on the virus species.
Understanding capsomere structure is essential for developing antiviral strategies and vaccines.
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Related terms
Capsid: The protein shell that encloses the genetic material of a virus.
Virion: A complete virus particle that consists of an RNA or DNA core with a protein coat, sometimes with external envelopes.
Nucleocapsid: The combination of viral nucleic acid (genetic material) and its surrounding capsid proteins.