Mid1p-dependent regulation of the M–G1 transcription wave in fission yeast

Agarwall, M., Papadopoulou, K., Mayeux, A., Vajrala, V., Quintana-Rincon, D.M., Paoletti, A. and McInerny, C.J. (2010) Mid1p-dependent regulation of the M–G1 transcription wave in fission yeast. Journal of Cell Science, 123(24), pp. 4366-4373. (doi:10.1242/jcs.073049)

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Abstract

The control of gene expression at certain times during the mitotic cell division cycle is a common feature in eukaryotes. In fission yeast, at least five waves of gene expression have been described, with one transcribed at the M-G1 interval under the control of the PBF transcription factor complex. PBF consists of at least three transcription factors, two forkhead-like proteins Sep1p and Fkh2p, and a MADS box-like protein Mbx1p, and binds to PCB motifs found in the gene promoters. Mbx1p is under the direct control of the polo-like kinase Plo1p and the Cdc14p-like phosphatase Clp1p (Flp1p). Here, we show that M-G1 gene expression in fission yeast is also regulated by the anillin-like protein, Mid1p (Dmf1p). Mid1p binds in vivo to both Fkh2p and Sep1p, and to the promoter regions of M-G1 transcribed genes. Mid1p promoter binding is dependent on Fkh2p, Plo1p and Clp1p. The absence of mid1+ in cells results in partial loss of M-G1 specific gene expression, suggesting that it has a negative role in controlling gene expression. This phenotype is exacerbated by also removing clp1+, suggesting that Mid1p and Clp1p have overlapping functions in controlling transcription. As mid1+ is itself expressed at M-G1, these observations offer a new mechanism whereby Mid1p contributes to controlling cell cycle-specific gene expression as part of a feedback loop.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McInerny, Dr Chris
Authors: Agarwall, M., Papadopoulou, K., Mayeux, A., Vajrala, V., Quintana-Rincon, D.M., Paoletti, A., and McInerny, C.J.
College/School:College of Medical Veterinary and Life Sciences > School of Life Sciences
Journal Name:Journal of Cell Science
Journal Abbr.:J. Cell Sci.
ISSN:0021-9533
ISSN (Online):1477-9137
Published Online:23 November 2010

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