| Abstrakt: |
Data on structural and functional characteristics of plant NADPH oxidase (Rboh) are generalized. The enzyme homologs identical to the subunit gp91(phox) of the enzymatic complex of animal cells were found in plants. The activation of Rboh depends on the influx of Ca2+ into the cytoplasm and phosphorylation of the N-terminal region of the enzyme by Ca(2+)-dependent protein kinase. The possibility of the involvement of Rop GTPase, a cytosolic component of Rboh, in the activation of Rboh is discussed. It is postulated that Rboh localizes on the plasma membrane of plant cells. Rboh is activated under the influence of both biotic and abiotic factors, which is apparently associated with Ca2+ fluxes, reactive oxygen and nitrogen species, and transduction of information to the nuclear genome. |
