A tandemly repetitive centromeric DNA sequence of the fish Hoplias malabaricus (Characiformes : Erythrinidae) is derived from 5S rDNA

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorMartins, Cesar
dc.creatorFerreira, Irani Alves
dc.creatorOliveira, Claudio
dc.creatorForesti, Fausto
dc.creatorGaletti, Pedro Manoel
dc.date2014-05-20T13:51:17Z
dc.date2016-10-25T17:02:56Z
dc.date2014-05-20T13:51:17Z
dc.date2016-10-25T17:02:56Z
dc.date2006-05-01
dc.date.accessioned2017-04-05T21:04:56Z
dc.date.available2017-04-05T21:04:56Z
dc.identifierGenetica. Dordrecht: Springer, v. 127, n. 1-3, p. 133-141, 2006.
dc.identifier0016-6707
dc.identifierhttp://hdl.handle.net/11449/18314
dc.identifierhttp://acervodigital.unesp.br/handle/11449/18314
dc.identifier10.1007/s10709-005-2674-y
dc.identifierWOS:000239164900012
dc.identifierhttp://dx.doi.org/10.1007/s10709-005-2674-y
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/864535
dc.descriptionA substantial fraction of the eukaryotic genome consists of repetitive DNA sequences that include satellites, minisatellites, microsatellites, and transposable elements. Although extensively studied for the past three decades, the molecular forces that generate, propagate and maintain repetitive DNAs in the genomes are still discussed. To further understand the dynamics and the mechanisms of evolution of repetitive DNAs in vertebrate genome, we searched for repetitive sequences in the genome of the fish species Hoplias malabaricus. A satellite sequence, named 5SHindIII-DNA, which has a conspicuous similarity with 5S rRNA genes and spacers was identified. FISH experiments showed that the 5S rRNA bona fide gene repeats were clustered in the interstitial position of two chromosome pairs of H. malabaricus, while the satellite 5SHindIII-DNA sequences were clustered in the centromeric position in nine chromosome pairs of the species. The presence of the 5SHindIII-DNA sequences in the centromeres of several chromosomes indicates that this satellite family probably escaped from the selective pressure that maintains the structure and organization of the 5S rDNA repeats and become disperse into the genome. Although it is not feasible to explain how this sequence has been maintained in the centromeric regions, it is possible to hypothesize that it may be involved in some structural or functional role of the centromere organization.
dc.languageeng
dc.publisherSpringer
dc.relationGenetica
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subject5S rDNA
dc.subject5S rDNA variant
dc.subjectcentromeric DNA
dc.subjectfish
dc.subjectHoplias malabaricus
dc.subjectsatellite DNA
dc.titleA tandemly repetitive centromeric DNA sequence of the fish Hoplias malabaricus (Characiformes : Erythrinidae) is derived from 5S rDNA
dc.typeOtro


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