Occurrence of oscillations in ATP synthesis and hydrolysis in chromatophores ofRhodospirillum rubrum

✍ Scribed by Javier G. Fernández Velasco; Norma L. Pucheu; Oscar Romero; Norma L. Kerber; Raúl A. Fernández; Augusto F. García

• Book ID: 104762843
• Publisher: Springer
• Year: 1985
• Tongue: English
• Weight: 415 KB
• Volume: 143
• Category: Article
• ISSN: 0302-8933
• DOI: 10.1007/bf00411046

✦ Synopsis

The conditions under which an oscillatory behaviour is observed during net hydrolysis or synthesis of ATP in chromatophores of Rhodospirillum rubrum FR1 are described. In the case of ATPase the oscillations are observed at low temperature (ca. II~ in the dark after an initial transient behaviour. These oscillations are attenuated or disappear by the addition of an uncoupler.

Oscillations are also observed during ATP synthesis. At 3~ the oscillations appear spontaneously if photophosphorylation is measured during a sufficiently long time. At 30~ the mere intercalation of a dark period also at 30~ is sufficient to trigger the oscillations in the following light period.