Bgs2p, a 1,3‐β‐glucan synthase subunit, is essential for maturation of ascospore wall in Schizosaccharomyces pombe

FEBS Letters

Liu, Jianhua¹  Wang, Hongyan¹  Balasubramanian, Mohan¹  Tang, Xie¹ 

[1] Institute of Molecular Agrobiology, The National University of Singapore, 1 Research Link, Singapore 117604, Singapore

关键词: Bgs2p;    1;    3-β-Glucan synthase;    Sporulation;    Ascospore wall;    Schizosaccharomyces pombe;   

DOI  :  10.1016/S0014-5793(00)01828-7

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Previously we have reported that Drc1p/Cps1p, a 1,3-β-glucan synthase subunit, is essential for division septum assembly in Schizosaccharomyces pombe. In this report, we present evidence that S. pombe Bgs2p, a 1,3-β-glucan synthase that shows 56% identity to Drc1p/Cps1p, is essential for maturation of ascospore wall in S. pombe, but is not required for vegetative growth. Diploid cells homozygous for the bgs2-null mutation, as well as homothallic bgs2-null mutant haploids undergo meiosis normally. However, a 1,3-β-glucan containing spore wall is not assembled in these cells. The spores resulting from meiosis of a bgs2-null mutant lyse upon release from the ascus and are therefore inviable. Using a green fluorescent protein-tagged Bgs2p, we demonstrate that Bgs2p is localized at the periphery of the ascospores during meiosis and sporulation. However, Bgs2p is not detected in vegetative cells. We conclude that Bgs2p is required for 1,3-β-glucan synthesis during ascospore wall maturation.

【 授权许可】

Unknown