Open AccessCell shape regulation and co‐translocation of actin and adenosyl homocysteinase in response to intermediate hypertonicity
Author(s) -
Yamada Yohko,
Sameshima Masazumi
Publication year - 2004
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.2004.tb09784.x
Subject(s) - microbiology and biotechnology , cytosol , cell cortex , actin , cofilin , chromosomal translocation , dictyostelium , biology , myosin , cytoskeleton , cell , chemistry , actin cytoskeleton , biochemistry , enzyme , gene
Hypertonic stimulation induced association of S ‐adenosyl‐ l ‐homocysteine hydrolase (SAHH) with the F‐actin‐rich cell cortex in Dictyostelium . At intermediate, but not higher, levels of hypertonicity, SAHH further translocated from the cortex to the cytosol in company with a fraction of actin and cofilin. At the same time the cells rounded up. Acidification of the cells stimulated both the cell rounding and the translocation of actin and SAHH, whereas alkalinization retarded these responses, suggesting that cellular pH is involved in their control. On the other hand, mutant analysis suggested that neither cGMP signaling nor conventional myosin is required.