Cloning and characterisation of telomeric DNA from Cladosporium fulvum
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The molecular cloning of DNA from the telomere of one chromosome of Cladosporium fulvum, a fungal pathogen of tomato, is described. The telomeric DNA exhibits tandem repeats of the sequence TTAGGG running 5' to 3' toward the chromosome end. At least 16 tracts of TTAGGG repeats are present in the C. fulvum genome. All such tracts are telomeric, and all chromosome-sized DNAs separated by pulsed-field gel electrophoresis exhibit the repeats. It is probable that tracts of these repeats are present at all chromosome termini. The cloned telomeric DNA exhibits 19 copies of the TTAGGG hexanucleotide motif, and evidence is presented indicating that all tracts of TTAGGG repeats are quite short. Telomere-linked restriction-fragment length polymorphisms between races of C. fulvum have been detected, and groupings based on these polymorphisms are consistent with those determined previously. Sub-telomeric DNA, centromere proximal to the cloned telomeric DNA, contains sequences reiterated many times in the genome; some of these repeats are at non-terminal locations. Partial sequence analysis indicates an absence of homology with the sub-telomeric DNA of other organisms.
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Jahn, A.; Rane, G.; Paszkowski-Rogacz, M.; Sayols, S.; Bluhm, A.; Han, C.; Draškovic, I.; Londoño-Vallejo, J.; Kumar, Alan Prem; Buchholz, F.; Butter, F.; Kappei, D. (2017)Â© 2017 The Authors. Published under the terms of the CC BY 4.0 license Telomeres constitute the ends of linear chromosomes and together with the shelterin complex form a structure essential for genome maintenance and ...
Pulsed field gel electrophoresis reveals chromosome length differences between strains of Cladosporium fulvum (syn. Fulvia fulva)Talbot, N.; Coddington, A.; Oliver, Richard (1991)Methods are described for the electrophoretic separation of chromosome-sized DNA molecules from the fungal tomato pathogen Cladosporium fulvum (syn. Fulvia fulva). Using a hexagonal electrode array and switching times of ...
Zhang, J.; Rane, G.; Dai, X.; Shanmugam, M.; Arfuso, Frank; Samy, R.; Lai, M.; Kappei, D.; Kumar, Alan Prem; Sethi, G. (2016)© 2015 Elsevier B.V. Telomeres are the heterochromatic repeat regions at the ends of eukaryotic chromosomes, whose length is considered to be a determinant of biological ageing. Normal ageing itself is associated with ...