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Statistical analysis of sizes and shapes of virus capsids and their resulting elastic propertiesRapoš Božič, Anže ; Šiber, Antonio, 1972- ; Podgornik, RudolfFrom the analysis of sizes of approximately 130 small icosahedral viruses we find that there is a typical structural capsid protein, having a mean diameter of 5 nm and a mean thickness of 3 nm, with ... more than two thirds of the analyzed capsid proteins having thicknesses between 2 nm and 4 nm. To investigate whether, in addition to the fairly conserved geometry, capsid proteins show similarities in the way they interact with one another, we examined the shapes of the capsids in detail. We classified them numerically according to their similarity to sphere and icosahedron and an interpolating set of shapes in between, all of them obtained from the theory of elasticity of shells. In order to make a unique and straightforward connection between an idealized, numerically calculated shape of an elastic shell and a capsid, we devised a special shape fitting procedure, the outcome of which is the idealized elastic shape fitting the capsid best. Using such a procedure we performed statistical analysis of a series of virus shapes and we found similarities between the capsid elastic properties of even very different viruses. As we explain in the paper, there are both structural and functional reasons for the convergence of protein sizes and capsid elastic properties. Our work presents a specific quantitative scheme to estimate relatedness between different proteins based on the details of the (quaternary) shape they form (capsid). As such, it may provide an information complementary to the one obtained from the studies of other types of protein similarity, such as the overall composition of structural elements, topology of the folded protein backbone, and sequence similarity.Vir: Journal of biological physics. - ISSN 0092-0606 (Vol. 39, iss. 2, 2013, str. 215-228)Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasleLeto - 2013Jezik - angleškiCOBISS.SI-ID - 2537060
Avtor
Rapoš Božič, Anže |
Šiber, Antonio, 1972- |
Podgornik, Rudolf
Teme
capsids |
viruses |
geometry |
elasticity
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Baze podatkov, v katerih je revija indeksirana
Ime baze podatkov | Področje | Leto |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Rapoš Božič, Anže | 32154 |
Šiber, Antonio, 1972- | 52169 |
Podgornik, Rudolf | 08589 |
Vir: Osebne bibliografije
in: SICRIS
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