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| Content Provider | PubMed Central |
|---|---|
| Author | Fu, G. Barker, D. C. |
| Abstract | Characterisation of the telomeres of Leishmania is important for understanding many aspects of the parasitic life of this primitive protozoan and for the completion of the physical map and sequencing of the genome. After sequencing more than 300 telomere-derived clones from Leishmania braziliensis and Leishmania major, a conserved 100 bp sequence was identified immediately adjacent to the telomere at the chromosome end and was named LCTAS (Leishmania conserved telomere-associated sequence). The LCTAS contains two conserved sequence boxes, and is present in all Leishmania species studied. The organisation of the LCTAS in the telomeric region differs between L. braziliensis and L. major: in L. major the LCTASs are tandemly repeated, while in L. braziliensis the LCTAS is present as a single copy per end. Two additional TASs with 1.6 kb and 274 bp repeat structures, which are apparently different to LCTAS, were isolated and mapped onto a L. braziliensis 250 kb multicopy minichromosome and the L. major chromosome 1, respectively. An unusual feature in L. braziliensis is that the telomeric repeats are often comprised of a novel tandem repeat CCCTAACCCGTGGA. A 'slippage' mechanism for LCTAS formation is proposed in this study as an alternative way for the synthesis and maintenance of telomeres and subtelomere regions. |
| Starting Page | 2161 |
| File Format | |
| ISSN | 13624962 |
| e-ISSN | 13624962 |
| Journal | Nucleic Acids Research |
| Issue Number | 9 |
| Volume Number | 26 |
| Language | English |
| Publisher Date | 1998-05-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics |
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