Abstract:
:Condensins are highly conserved proteins that are important for chromosome maintenance in nearly all forms of life. Although many organisms employ two forms of the condensin complex, the condensin genes in Tetrahymena have expanded even further. Here we report a form of condensin that is specifically active during sexual reproduction. This complex, condensin D, is composed of the core condensin proteins, Smc2 and Smc4, and two unique subunits, the kleisin Cph5 and Cpd2. Cpd2 is also found in somatic nuclei in vegetative cells, but is dispensable for growth and nuclear division. Immunoprecipitation experiments show that condensin D interacts with a putative member of a chromatin-remodeling complex during development. Condensin D is required for sexual reproduction and for endoreplication and genome reduction of the progeny's somatic nuclei. Altogether, Tetrahymena possesses at least four forms of condensin to fulfill the needs of maintaining chromosomes in two different nuclei containing the somatic and germline genomes.
journal_name
Mol Biol Celljournal_title
Molecular biology of the cellauthors
Howard-Till R,Tian M,Loidl Jdoi
10.1091/mbc.E18-08-0487subject
Has Abstractpub_date
2019-05-15 00:00:00pages
1326-1338issue
11eissn
1059-1524issn
1939-4586journal_volume
30pub_type
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