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Plant and Cell Physiology Advance Access published online on August 21, 2007
Plant and Cell Physiology, doi:10.1093/pcp/pcm110
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© The Author 2007. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

A novel Fe deficiency responsive element (FeRE) regulates the expression of atx1 in Chlamydomonas reinharditii

Xiaowen Fei1,2 and Xiaodong Deng1,{dagger}

1State Key laboratory of Tropical Crop Biotechnology, Institute of Tropical Bioscience and Biotechnology, Chinese Agricultural Academy for Tropical Crops, Haikou 571101, China
2 Department of Biochemistry, Hainan Medical College, Haikou 571101, China

{dagger}To whom Correspondence should be addressed. Xiaodong Deng. Fax: +86-898-66890978, E-mail: xiaodong9deng{at}hotmail.com


  Abstract

We investigated the promoter region of atx1, which encodes a copper chaperone in response to iron deficiency induction. Deletion analysis of the promoter region from 5’ and 3’ ends revealed that the -532/-461 and -320 /-276 regions were necessary and sufficient for iron deficiency-inducible expression. Further deletion analysis showed that two of the Fe deficiency responsive elements (FeREs) localized within the -532/-511 and -306/-276 regions, in which AtxFeRE1 at –529/–515 (GTCGCACTGGCATGT) and AtxFeRE2 at –300/–286 (GCAGCGATGGCATTT) had been identified respectively, with a conserved sequence of GNNGCNNTGGCATNT, differing from all known FeREs found in other organisms.

Keywords: Chlamydomonas reinharditii - atx1 - Fe deficiency responsive element


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This article has been cited by other articles:


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