Functional complementation of the Schizosaccharomyces pombe wis1 mutant by Arabidopsis MEK1 and non‐catalytic enhancement by CTR1

FEBS Letters

Chang, Caren¹  Pan, Zaiqun¹ 

[1] Department of Cell Biology and Molecular Genetics and Maryland Agricultural Experiment Station, HJ Patterson Hall, University of Maryland, College Park, MD 20742, USA

关键词: Mitogen-activated protein kinase;    Stress-activated MAPK pathway;    trans-complementation;    Arabidopsis thaliana;    Schizosaccharomyces pombe;    MAP;    mitogen-activated protein;    MAPK;    MAP kinase;    MAPKK;    MAPK kinase;    EMM;    Edinburgh minimal medium;   

DOI  :  10.1016/S0014-5793(99)01306-X

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Arabidopsis thaliana MEK1 encodes a MAPKK homolog whose role in plants is currently unknown. High (but not low) expression of MEK1 rescued the Δwis1 (MAPKK) mutant of the Schizosaccharomyces pombe Win1/Wis4-Wis1-Sty1 stress-activated MAPK pathway. Rescue was dependent upon upstream and downstream components of the pathway, suggesting that MEK1 might function in a homologous MAPK pathway in plants. When MEK1 was expressed at a low level, rescue of Δwis1 was achieved by co-expressing Arabidopsis CTR1 (a putative MAPKK kinase (MAPKKK)). CTR1 constructs alone did not rescue the pathway, indicating that CTR1 augmented MEK1 function. Further data indicated that this enhancement was not due to CTR1 kinase activity.

【 授权许可】

Unknown