Chaperonin produced by an intracellular symbiont is an energy-coupling protein with phosphotransferase activity.

Chaperonin produced by an intracellular symbiont is an energy-coupling protein with phosphotransferase activity. Research Abstract Details 

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Chaperonin produced by an intracellular symbiont is an energy-coupling protein with phosphotransferase activity. Abstract Text:

M Morioka,H Muraoka,H Ishikawa,

Symbionin, a GroEL homologous molecular chaperone produced by an intracellular symbiont of the pea aphid, is autocatalytically phosphorylated in vitro at elevated temperatures. The phosphorylated symbionin showed a potent suppressive activity in spontaneous refolding of chemically denatured dihydrofolate reductase. When the 32P-labeled autophosphorylated symbionin was incubated with ADP, a portion of the radioactivity was transferred to ADP, suggesting that the autocatalytically phosphorylated symbionin contains high-energy phosphate bonds. It was also shown that when symbionin was incubated with [gamma-32P]ATP and GDP, a large amount of the radioactivity was found in GTP, indicating that phosphate transfer between ATP and GDP is catalyzed by symbionin. These results suggested that in the endosymbiotic system symbionin functions as not only a molecular chaperone but also an energy-coupling protein.

Chaperonin produced by an intracellular symbiont is an energy-coupling protein with phosphotransferase activity. Publishing Authors By Initials

M Morioka,H Muraoka,H Ishikawa,

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Chaperonin produced by an intracellular symbiont is an energy-coupling protein with phosphotransferase activity. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of biochemistry

VOLUME: 114

Page Numbers: 246-50

Journal Abbreviation: J. Biochem.

ISSN: 0021-924X

DAY: 19

MONTH: Aug

YEAR: 1993

Chaperonin produced by an intracellular symbiont is an energy-coupling protein with phosphotransferase activity. Information

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LANGUAGE: eng

NlmUniqueID: 376600

Chaperonin produced by an intracellular symbiont is an energy-coupling protein with phosphotransferase activity. Keywords Mesh Terms:

KEYWORDS: Proteins

MESH TERMS: metabolism

Chemical & Substance for Abstract: Chaperonin produced by an intracellular symbiont is an energy-coupling protein with phosphotransferase activity. Information

Substance Name: Phosphotransferases

Registry Number: EC 2.7.-

Grant and Affiliation Information for Chaperonin produced by an intracellular symbiont is an energy-coupling protein with phosphotransferase activity.

AFFILIATION: Zoological Institute, Faculty of Science, University of Tokyo.

Country: JAPAN

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MEDLINETA: J Biochem

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