Functional studies of synthetic gramicidin hybrid ion channels in CHO cells.
Standard
Functional studies of synthetic gramicidin hybrid ion channels in CHO cells. / Wesolowski, Ryszard; Sommer, Anna; Arndt, Hans-Dieter; Koert, Ulrich; Reiss, Philipp; Wimmers, Sönke; Strauss, Olaf.
In: CHEMBIOCHEM, Vol. 8, No. 5, 5, 2007, p. 513-520.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
Harvard
APA
Vancouver
Bibtex
}
RIS
TY - JOUR
T1 - Functional studies of synthetic gramicidin hybrid ion channels in CHO cells.
AU - Wesolowski, Ryszard
AU - Sommer, Anna
AU - Arndt, Hans-Dieter
AU - Koert, Ulrich
AU - Reiss, Philipp
AU - Wimmers, Sönke
AU - Strauss, Olaf
PY - 2007
Y1 - 2007
N2 - The function of a gramicidin hybrid ion channel in living Chinese hamster ovary (CHO) cells was investigated by the patch clamp method. The synthetic ion channel 1 consists of two cyclohexyl ether amino acids that link two mini-gramicidin strands. With 1 at a concentration of 1.0 microM, an increase in the whole-cell membrane conductance was observed after 1.37 min. The conductance showed larger currents when Cs(+) was used as charge carrier than when Na(+) and K(+) were used. In single-channel recordings with Cs(+) as charge carrier, the substance showed comparable single-channel amplitudes in the membrane of living cells and artificial black lipid bilayers. In addition to functioning as a cation channel, compound 1 appeared to be a water channel. Exposure of the CHO cells to an extracellular hypoosmotic solution did not substantially change the cell volume. Extracellular hypoosmotic conditions in the presence of 1 increased the cell size to 146.5 % that of the control. Thus, the synthetic hybrid channel 1 can function as a cation channel with some Cs(+) specificity, and as a water channel in CHO cells.
AB - The function of a gramicidin hybrid ion channel in living Chinese hamster ovary (CHO) cells was investigated by the patch clamp method. The synthetic ion channel 1 consists of two cyclohexyl ether amino acids that link two mini-gramicidin strands. With 1 at a concentration of 1.0 microM, an increase in the whole-cell membrane conductance was observed after 1.37 min. The conductance showed larger currents when Cs(+) was used as charge carrier than when Na(+) and K(+) were used. In single-channel recordings with Cs(+) as charge carrier, the substance showed comparable single-channel amplitudes in the membrane of living cells and artificial black lipid bilayers. In addition to functioning as a cation channel, compound 1 appeared to be a water channel. Exposure of the CHO cells to an extracellular hypoosmotic solution did not substantially change the cell volume. Extracellular hypoosmotic conditions in the presence of 1 increased the cell size to 146.5 % that of the control. Thus, the synthetic hybrid channel 1 can function as a cation channel with some Cs(+) specificity, and as a water channel in CHO cells.
M3 - SCORING: Zeitschriftenaufsatz
VL - 8
SP - 513
EP - 520
JO - CHEMBIOCHEM
JF - CHEMBIOCHEM
SN - 1439-4227
IS - 5
M1 - 5
ER -