Characterisation of a chloroplast‐encoded sec Y homologue and atpH from a chromophytic alga Evidence for a novel chloroplast genome organisation

FEBS Letters

Hiller, Roger G.¹  Scaramuzzi, Carol D.¹  Stokes, Harold W.¹ 

[1] School of Biological Sciences, Macquarie University, Sydney, NSW 2109, Australia

关键词: Chloroplast genome;    Chromophyta;    Pavlova lutherii;    sec Y;    atpH;    Protein translocation;   

DOI  :  10.1016/0014-5793(92)80601-C

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

sec Y is a prokaryotic gene that encodes the SecY protein, an integral membrane component of the prokaryotic protein translocation apparatus. A chloroplast-encoded sec Y homologue has been identified in the unicellular, chromophytic alga, Pavlova lutherii. The gene predicts a protein composed of ten membrane-spanning regions, that is approximately 25% homologous and 50% similar to bacterial and plastid SecY proteins. The sec Y gene from P. lutherii is independent of the ribosomal protein (rp) gene cluster to which it is closely linked in other organisms. In P. lutherii sec Y is located 5′ to atpI and atpH. Since, in higher plants the atpIHFA gene cluster and the rp gene cluster are separated by approximately 50 kb, we conclude, this indicates a novel chloroplast gene arrangement in P. lutherii.

【 授权许可】

Unknown