Isolation of a Chlamydomonas reinhardtii telomere by functional complementation in yeast.
We attempted to determine whether Chlamydomonas reinhardtii telomeres, which do not form G-quartet structures readily in vitro, are able to nucleate telomere addition in Saccharomyces cerevisiae. Restricted C. reinhardtii genomic DNA was ligated to a linear S. cerevisiae vector lacking a telomere. A C. reinhardtii telomere ligated to this unprotected end allowed vector replication as a linear DNA molecule in S. cerevisiae. DNA sequencing revealed common [T4AG3]n and variant T6AG3 and T5AG3 C. reinhardtii telomere repeats capped by S. cerevisiae telomere repeat units. The recognition of a C. reinhardtii telomere by the telomere maintenance machinery of S. cerevisiae is consistent with a common theme for telomere structure in organisms with divergent telomere repeats.
Hails
T
T
Biochemistry Department, Oxford University, UK.
Huttner
O
O
Day
A
A
D000818:Animals; D001483:Base Sequence; D016825:Chlamydomonas reinhardtii / Q000235:genetics*; D003001:Cloning, Molecular; D004274:DNA, Recombinant; D004926:Escherichia coli / Q000235:genetics; D005816:Genetic Complementation Test; D008969:Molecular Sequence Data; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D016615:Telomere
D004274:DNA, Recombinant