All higher plants have high-specific sites for binding fusicoccin (FCBS), a metabolite of the fungus Fusicoccum amygdaliDel. These sites are localized on the plasmalemma and produced by the association of the dimers of 14-3-3 proteins with the C-terminal autoinhibitory domain of H+-ATPase. Considering the fusicoccin binding to the plasmalemma as an index characterizing the formation of this complex, we studied the influence of osmotic stress on the interaction between 14-3-3 proteins and H+-ATPase in the suspension-cultured sugar beet cells and protoplasts obtained from them. An increase in the osmolarity of the extracellular medium up to 0.3 Osm was shown to enhance proton efflux from the cells by several times. The number of FCBS in isolated plasma membranes increased in parallel, whereas 14-3-3 proteins accumulated in this membrane to a lesser degree. The amount of H+-ATPase molecules did not change, and the ATP-hydrolase activity changed insignificantly. The data obtained indicate that osmotic stress affects H+-ATPase pumping in the plasmalemma through its influence on the coupling between H+-transport and ATP hydrolysis; 14-3-3 proteins are involved in this coupling. The interaction between the plasmalemma and the cell wall is suggested to be very important in this process.
Russian Journal of Plant Physiology – Springer Journals
Published: Oct 10, 2004
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera