A protein coat that covers the nucleoprotein core or nucleic acid of a virion. Commonly shows icosahedral symmetry and may itself be enclosed in an envelope (as in the Togaviridae). The capsid is built up of subunits (some integer multiple of 60, the number required to give strict icosahedral symmetry) that self-assemble in a pattern typical of a particular virus. The subunits are often packed, in smaller capsids, into 5- or 6-membered rings (pentamers or hexamers) that constitute the morphological unit (capsomere). The packing of subunits is not perfectly symmetrical in most cases and some units may have strained interactions and are said to have quasi-equivalence of bonding to adjacent units.

Dictionary of molecular biology. 2004.

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  • capsid — capsid. См. капсид. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Capsid — Capsid, Proteinhülle der Virusnucleinsäure; besteht jeweils aus einer Anzahl von spezifischen Proteinmolekülen, den Proteinuntereinheiten oder Capsomeren, die in genau festgelegter, sich wiederholender Reihenfolge um die Nucleinsäure herum… …   Deutsch wörterbuch der biologie

  • capsid — 1964, from Fr. capside (1959), from L. capsa box (see CASE (Cf. case) (2)) …   Etymology dictionary

  • capsid —  Capsid  Капсид   Белковая оболочка вирусной частицы …   Толковый англо-русский словарь по нанотехнологии. - М.

  • capsid — [kap′sid] n. the outer coat of a virus usually composed of layers of various proteins …   English World dictionary

  • Capsid — Schematic of a Cytomegalovirus 3D model of Helical capsid structure …   Wikipedia

  • Capsid — Schema eines ikosaedrischen Kapsids. Die Kugeln entsprechen den einzelnen Kapsomeren Als Kapsid oder Capsid (von lat. capsula: kleine Kapsel) bezeichnet man eine komplexe, regelmäßige Proteinstruktur bei Viren, die der Verpackung des Virusgenoms… …   Deutsch Wikipedia

  • capsid — See virion. * * * cap·sid kap səd n the protein shell of a virus particle that surrounds its nucleic acid cap·sid·al səd əl adj * * * cap·sid (kapґsid) [L. capsa a box] the shell of protein that protects the nucleic acid of a virus; it may have… …   Medical dictionary

  • Capsid — Cap|sid [lat. capsa = Kasten, Kapsel], das; s, e; S: Kapsid: die aus hochmol. Proteinen (MG 107) bestehende, aus Untereinheiten (Capsomere, MG >104) aufgebaute Hülle um den Nukleinsäurekern von Viren. * * * Capsid   [lateinisch] das, (e)s/ e,… …   Universal-Lexikon

  • capsid — The protein coat of a virus. The capsid often determines the shape of the virus. Synonym: coat protein …   Glossary of Biotechnology

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