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Satellite DNAs in Tenebrionid Species: Structure, Organization and Evolution

Đurđica Ugarković ; Department of Molecular Genetics, Ruder Bošković Institute, P.O.Box 1016, Bijenička 54, HR-10 000 Zagreb, Croatia
Eduard Petitpierre ; Department de Biologia Ambiental, Universitat de les Illes Balears, E-07071 Palma de Mallorca, Spain
Carlos Juan ; School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, United Kingdom
Miroslav Plohl ; Department of Molecular Genetics, Ruder Bošković Institute, P.O.Box 1016, Bijenička 54, HR-10 000 Zagreb, Croatia


Puni tekst: engleski pdf 19.018 Kb

str. 627-638

preuzimanja: 186

citiraj


Sažetak

The heterochromatic region of chromosomes contains highly repeated satellite DNAs with no or very few genes and is usually transcriptionally inactive. Its repetitive character has led to the suggestion that it is »junk DNA« with no utility, although some important inheritance functions have been mapped to it. Beetles from the family Tenebrionidae (Insecta, Coleoptera) contain a substantial amount of heterochromatin and satellite DNA in their genome and represent a suitable system for structural and organizational studies. Here, the data on the primary and higher order structure and organization of satellite DNAs from ten different tenebrionid species are presented, as well as on mutational processes effecting their evolution. Using these data, we have tried to determine conserved structural elements within satellites which can be important for maintaining the heterochromatin structure and compactness. Such analyses could help to define the structural components of the chromosome responsible for some heterochromatic functions, like chromosome pairing, centromere function and sister chromatid adhesion.

Ključne riječi

Hrčak ID:

136722

URI

https://hrcak.srce.hr/136722

Posjeta: 388 *