Abstract:
:Cell cycle regulation is pivotal for proper cell division and cellular differentiation in eukaryotic cells. The central regulators that govern eukaryotic cell cycle progression are cyclin-dependent kinases (CDKs) and their partners. Here, we report that Magnaporthe oryzae CKS1 encodes a cyclin-dependent kinase subunit, which plays a significant role in regulation of plant infection. We demonstrate that CKS1 is a functional homolog of CKS1/SUC1 and can physically interact with the CDK protein Cdc28, and Som1, a downstream regulator of the cyclic AMP-dependent Protein Kinase A pathway. CKS1 deletion mutants are severely impaired in hyphal growth, sexual reproduction, melanin pigmentation and conidiogenesis. Cks1 mutants are able to form appressoria from hyphal tips, but these are unable to re-polarize, and rice infection is impaired. CKS1 also affects chitin and glucan synthase activity during cell wall differentiation and fungal hydrophobin function. CKS1, therefore, encodes a conserved CDK-binding partner, essential for appressorium-mediated plant infection by the rice blast fungus.
journal_name
Environ Microbioljournal_title
Environmental microbiologyauthors
Yue X,Que Y,Deng S,Xu L,Oses-Ruiz M,Talbot NJ,Peng Y,Wang Zdoi
10.1111/1462-2920.13796subject
Has Abstractpub_date
2017-10-01 00:00:00pages
3959-3981issue
10eissn
1462-2912issn
1462-2920journal_volume
19pub_type
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