Premium
Novel heterocyst‐specific flavodiiron proteins in Anabaena sp. PCC 7120
Author(s) -
Ermakova Maria,
Battchikova Natalia,
Allahverdiyeva Yagut,
Aro Eva-Mari
Publication year - 2013
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2012.11.006
Subject(s) - heterocyst , anabaena , gene , cyanobacteria , biochemistry , biology , oxidative phosphorylation , nitrogenase , nitrogen fixation , microbiology and biotechnology , genetics , bacteria
Flavodiiron proteins present in many prokaryotic and some eukaryotic organisms have a capacity to protect cells against nitrosative or oxidative stress. In Anabaena sp. PCC 7120, Flv1 and Flv3 proteins are encoded by families of two genes. We demonstrate here that flv1A and flv3A genes are up‐regulated in vegetative cells in low CO 2 and high light conditions. In contrast, flv1B and flv3B genes are expressed in N 2 ‐fixing conditions and corresponding proteins are located exclusively in heterocysts. It is suggested that Flv1B and Flv3B protect enzymes of N 2 ‐fixation in heterocysts of Anabaena 7120 by reducing molecular oxygen directly to water.