Membrane-bound potassium and magnesium ion-stimulated inorganic pyrophosphatase from roots and cotyledons of sugar beet ( Beta Vulgaris L.)

1. 1. The 25 000–30 000 × g fraction from sugar beet leaf or roots contains, together with (Na + + K +)-activated ATPase, also K +-stimulated inorganic pyrophosphatase. 2. 2. This inorganic pyrophosphatase is also stimulated by Rb + and to a lesser degres by Li + and Na +. 3. 3. Na + is at the same...

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Bibliographic Details
Published inBiochimica et biophysica acta Vol. 399; no. 2; pp. 356 - 363
Main Author Karlsson, Jan
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 13.08.1975
Subjects
Adenosine Triphosphatases - metabolism
Cations, Monovalent
Cell Membrane - drug effects
Cell Membrane - enzymology
Enzyme Activation - drug effects
Hydrogen-Ion Concentration
Kinetics
Magnesium - pharmacology
Phosphates
Plants - enzymology
Potassium - pharmacology
Pyrophosphatases - metabolism
Subcellular Fractions - enzymology
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Summary:1. 1. The 25 000–30 000 × g fraction from sugar beet leaf or roots contains, together with (Na + + K +)-activated ATPase, also K +-stimulated inorganic pyrophosphatase. 2. 2. This inorganic pyrophosphatase is also stimulated by Rb + and to a lesser degres by Li + and Na +. 3. 3. Na + is at the same time an inhibitor to the K +-stimulation of the inorganic pyrophosphatase. 4. 4. No signs of synergism for (Na + + K +) were found. 5. 5. Optimum pH was at about 8.5.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0304-4165
0006-3002
1872-8006
DOI:10.1016/0304-4165(75)90264-0