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Six Arabidopsis thaliana homologues of the human respiratory burst oxidase ( gp91 phox )
Author(s) -
Torres Miguel Angel,
Onouchi Hitoshi,
Hamada Susuma,
Machida Chiyoko,
HammondKosack Kim E.,
Jones Jonathan D. G.
Publication year - 1998
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1046/j.1365-313x.1998.00136.x
Subject(s) - nadph oxidase , arabidopsis thaliana , oxidase test , gene , respiratory burst , biology , intron , microbiology and biotechnology , reactive oxygen species , alternative oxidase , genetics , biochemistry , enzyme , mutant
Summary An NADPH oxidase analogous to that in mammalian phagocytes has been hypothesized to produce reactive oxygen species (ROS) in the plant defence response. A. thaliana contains at least six gp91 phox homologues, designated AtrbohA‐F (A . t haliana R espiratory B urst O xidase H omologues), which map to different positions. Transcripts of three of these genes can be detected in healthy plants by RNA gel blot analyses. The Atrboh gene products are closely related to gp91 phox and the intron locations suggest a common evolutionary origin. A putative EF‐hand Ca 2+ ‐binding motif in the extended N‐terminal region of the Atrboh proteins suggests a direct regulatory effect of Ca 2+ on the activity of the NADPH oxidase in plants.