Na+-dependent transport of glycine in renal brush border membrane vesicles. Evidence for a single specific transport system.
Na+-dependent transport of glycine in renal brush border membrane vesicles. Evidence for a single specific transport system.
复制标题
肾刷状缘膜囊泡中甘氨酸的 Na 依赖性转运。
DOI:
10.1016/0005-2736(82)90112-2
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发表时间:
1982
期刊:
影响因子:
--
通讯作者:
Sacktor,B
中科院分区:
文献类型:
--
作者:
Hammerman,MR;Sacktor,B
The uptake of glycine in rabbit renal brush border membrane vesicles was shown to consist of glycine transport into an intravesicular space. An Na+electrochemical gradient (extravesicular>intravesicular) stimulated the initial rate of glycine uptake and effected a transient accumulation of intravesicular glycine above the steady-state value. This stimulation could not be induced by the imposition of a K+, Li+or choline+gradient and was enhanced as extravesicular Na+was increased from 10 mM to 100 mM. Dissipation of the Na+gradient by the ionophore gramicidin D resulted in diminished Na+-stimulated glycine uptake. Na+-stimulated uptake of glycine was electrogenic. Substrate-velocity analysis of Na+-dependent glycine uptake over the range of amino acid concentrations from 25 μM to 10 mM demonstrated a single saturable transport system with apparentKm= 996μM andVmax= 348 pmol glycine/mg protein per min. Inhibition observed when the Na+-dependent uptake of 25 μM glycine was inhibited by 5 mM extravesicular test amino acid segregated dibasic amino acids, which did not inhibit glycine uptake, from all other amino acid groups. The amino acidsd-alanine,d-glutamic acid, andd-proline inhibited similarly to theirlcounterparts. Accelerative exchange of extravesicular [3H]glycine was demonstrated when brush border vesicles were preloaded with glycine, but not when they were preloaded withl-alanine,l-glutamic acid, or withl-proline. It is concluded that a single transport system exists at the level of the rabbit renal brush border membrane that functions to reabsorb glycine independently from other groups of amino acids.
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DOI:
--
发表时间:
1957
期刊:
The Journal of General Physiology
影响因子:
--
作者:
T. Rosenberg;W. Wilbrandt
通讯作者:
W. Wilbrandt
影响因子:
4.8
作者:
M. Hammerman;B. Sacktor
通讯作者:
B. Sacktor
DOI:
10.1016/0005-2736(78)90052-4
发表时间:
1978
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
M. Hammerman;B. Sacktor
通讯作者:
B. Sacktor
影响因子:
4.8
作者:
S. Fass;M. Hammerman;B. Sacktor
通讯作者:
B. Sacktor
影响因子:
4.1
作者:
Peter J. F. Henderson;J. McGivan;J. Chappell
通讯作者:
J. Chappell