title: The alga Chlamydomonas reinhardtii UVS11 gene is responsible for cell division delay and temporal decrease in histone H1 kinase activity caused by UV irradiation.
abstract: The aim of the present work was to study the possible role of the UVS11 gene of the alga Chlamydomonas reinhardtii, in regulation of the cell cycle. To characterize the defect of a uvs11 mutant in respect to DNA damage-dependent cell cycle arrest, we examined first the influence of the tubulin-destabilizing drug methyl benzimidazole-2-yl-carbamate (MBC) on inhibition of mitosis in response to UV 254nm. Then the growth and reproductive processes and activity of cyclin-dependent kinases (CDK)-like kinases during the cell cycle of C. reinhardtii were investigated. In both, the wild type and the uvs11 mutant strain were compared under standard conditions and after DNA damage caused by UV 254nm. We assume the green alga C. reinhardtii possesses control mechanisms allowing to stop the cell cycle progression before mitosis in response to DNA damage. The results indicate that the uvs11 mutant is not able to stop the cell cycle after UV irradiation. We suggest that a product of the UVS11 gene affects cell response to DNA damage and influences a decrease in histone H1 kinase activity.
authors.affiliation: Department of Genetics, Faculty of Natural Sciences, Comenius University, Bratislava 4 SK-842 15, Slovak Republic.
authors.forename: Miroslava
authors.initials: M
authors.lastname: Slaninová
authors.forename: Barbara
authors.initials: B
authors.lastname: Nagyová
authors.forename: Eliska
authors.initials: E
authors.lastname: Gálová
authors.forename: Jana
authors.initials: J
authors.lastname: Hendrychová
authors.forename: Katerina
authors.initials: K
authors.lastname: Bisová
authors.forename: Vilém
authors.initials: V
authors.lastname: Zachleder
authors.forename: Daniel
authors.initials: D
authors.lastname: Vlcek
mesh_terms: D000818:Animals; D002455:Cell Division / Q000235:genetics* / Q000502:physiology; D016825:Chlamydomonas reinhardtii / Q000235:genetics* / Q000502:physiology / Q000528:radiation effects; D004249:DNA Damage; D018816:Genes, cdc / Q000502:physiology*; D026901:Membrane Transport Proteins / Q000378:metabolism; D008938:Mitosis / Q000502:physiology; D010940:Plant Proteins / Q000378:metabolism; D011494:Protein Kinases / Q000528:radiation effects*; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D026901:Membrane Transport Proteins; D010940:Plant Proteins; C078729:sucrose transport protein, plant; D011494:Protein Kinases; C102333:histone H1 kinase