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Plant and Cell Physiology Advance Access originally published online on August 21, 2007
Plant and Cell Physiology 2007 48(10):1496-1503; 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 email: journals.permissions@oxfordjournals.org

Short Communication

A Novel Fe Deficiency-Responsive Element (FeRE) Regulates the Expression of atx1 in Chlamydomonas reinharditii

Xiaowen Fei1,2 and Xiaodong Deng1,*

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

*Corresponding author: E-mail, xiaodong9deng{at}hotmail.com; Fax, +86-898-66890978.


  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 the 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

Abbreviations: Ars, arylsulfatase; atx1, antioxidant 1; Fer1, ferritin 1; FeRE, Fe deficiency-responsive element; Fox1, ferroxidase1; Ftr1, iron permease.

(Received June 26, 2007; Accepted August 10, 2007)
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 Eukaryot CellHome page
X. Deng and M. Eriksson
Two Iron-Responsive Promoter Elements Control Expression of FOX1 in Chlamydomonas reinhardtii
Eukaryot. Cell, November 1, 2007; 6(11): 2163 - 2167.
[Abstract] [Full Text] [PDF]


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