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The stimulation of coupling factor 1 ATPase by tentoxin.

Authors :
Steele JA
Uchytil TF
Durbin RD
Source :
Biochimica et biophysica acta [Biochim Biophys Acta] 1978 Oct 11; Vol. 504 (1), pp. 136-41.
Publication Year :
1978

Abstract

Tentoxin at 10--1000 micrometer causes a marked species-selective stimulation of coupling factor 1 Ca2+-dependent ATPase activity (Ka 6.3 . 10(3) M-1). This effect decreases the Km for ATP to about 0.3 mM and increases V 2.75-fold. Above 1.6 micrometer tentoxin the rate of coupled electron transport was reduced to basal without uncoupling.

Subjects

Subjects :
Enzyme Activation
Kinetics
Plants enzymology
Species Specificity
Adenosine Triphosphatases metabolism
Mycotoxins pharmacology
Peptides, Cyclic pharmacology
Proton-Translocating ATPases metabolism

Details

Language :
English
ISSN :
0006-3002
Volume :
504
Issue :
1
Database :
MEDLINE
Journal :
Biochimica et biophysica acta
Publication Type :
Academic Journal
Accession number :
152124
Full Text :
https://doi.org/10.1016/0005-2728(78)90012-9
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