Journal of Cell Science 115, e305-e305 (2002)
© 2002 The Company of Biologists Limited
Pds5 and chromatid cohesion in fission yeast (p. 587)
Sister chromatid cohesion is essential both for alignment of chromosomes at
metaphase and for DNA repair in G2 phase. Cohesion is maintained by the
multiprotein complex cohesin and cohesin-associated proteins, such as Pds5.
Present in S. cerevisiae, A. nidulans and metazoans, Pds5 is
implicated in establishment and maintenance of chromatid cohesion; however,
its importance and precise role have proven difficult to define. Chris Norbury
and co-workers have therefore characterized the Pds5 orthologue from the model
organism S. pombe. They find that, unlike S. cerevisiae
Pds5p, S. pombe Pds5 is non-essential and is not required for
chromosome condensation. Nevertheless, it does appear to function in chromatid
cohesion: the authors provide genetic and biochemical evidence for interaction
between Pds5 and cohesin components such as Rad21; in addition, they find that
pds5 mutants exhibit high levels of chromosomal abnormalities and
that Pds5 becomes essential if mitotic progression is delayed. S.
pombe Pds5 thus appears to have an important role in chromatid cohesion
but one that differs significantly from that of S. cerevisiae
Pds5p.

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Related articles in JCS:
- Fission yeast Pds5 is required for accurate chromosome segregation and for survival after DNA damage or metaphase arrest
- Shao-Win Wang, Rebecca L. Read, and Chris J. Norbury
JCS 2002 115: 587-598.
[Abstract]
[Full Text]