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Caspar-Klug theory has played an important part in shaping the subsequent study of viruses and other macromolecular assemblies. The original concept was based mainly on electron microscope studies, and has now been refined to take account of the atomic resolution structure of viruses , and other details of protein–protein interactions that ...
Thus, an icosahedral virus is made of 60N protein subunits. The number and arrangement of capsomeres in an icosahedral capsid can be classified using the "quasi-equivalence principle" proposed by Donald Caspar and Aaron Klug. [13] Like the Goldberg polyhedra, an icosahedral structure can be regarded as being constructed from pentamers and hexamers.
The Caspar-Klug theory of viral capsids Topics referred to by the same term This disambiguation page lists articles associated with the title Quasi-equivalence .
Klug's most important work is concerned with the structure of spherical viruses. Together with D. Caspar he developed a general theory of spherical shells built up of a regular array of asymmetric particles. Klug and his collaborators verified the theory by x-ray and electron microscope studies, thereby revealing new and hitherto unsuspected ...
Geodesic domes are the geometric dual of (a section of) a Goldberg polyhedron: a full geodesic dome can be thought of as a geodesic polyhedron, dual to the Goldberg polyhedron. In 1962, Donald Caspar and Aaron Klug published an article on the geometry of viral capsids that applied and expanded upon concepts from Goldberg and Fuller. [10]
The theory of a universal common ancestry of life is widely accepted. In 2010, based on "the vast array of molecular sequences now available from all domains of life," [ 70 ] D. L. Theobald published a " formal test " of universal common ancestry (UCA).
The viral eukaryogenesis hypothesis posits that eukaryotes are composed of three ancestral elements: a viral component that became the modern nucleus; a prokaryotic cell (an archaeon according to the eocyte hypothesis) which donated the cytoplasm and cell membrane of modern cells; and another prokaryotic cell (here bacterium) that, by endocytosis, became the modern mitochondrion or chloroplast.
Viral evolution is a subfield of evolutionary biology and virology that is specifically concerned with the evolution of viruses. [1] [2] Viruses have short generation times, and many—in particular RNA viruses—have relatively high mutation rates (on the order of one point mutation or more per genome per round of replication).