Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
2015451 | Plant Physiology and Biochemistry | 2008 | 5 Pages |
Abstract
This work reports the analysis of an additional hemoglobin (hb) gene copy, hb5, in the genome of rice. The amino acid sequence of Hb5 differs from the previously determined rice Hbs 1-4 in missing 11 residues in helix E. Transcripts of hb5 were found to be ubiquitous in rice organs, and hormone- and stress-response promoters exist upstream of the rice hb5 gene. Furthermore, the modeled structure of Hb5 based on the known crystal structure of rice Hb1 is unusual in that the putative distal His is distant from the heme Fe. This observation suggests that Hb5 binds and releases O2 easily and thus that it functions as an O2-carrier or in some aspects of the O2 metabolism.
Keywords
Related Topics
Life Sciences
Agricultural and Biological Sciences
Plant Science
Authors
Verónica Garrocho-Villegas, Genoveva Bustos-Rivera, Julian Gough, Serge N. Vinogradov, Raúl Arredondo-Peter,