𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Alternative photophosphorylation, inorganic pyrophosphate synthase and inorganic pyrophosphate

✍ Scribed by Margareta Baltscheffsky; Herrick Baltscheffsky

Book ID
104615764
Publisher
Springer
Year
1995
Tongue
English
Weight
405 KB
Volume
46
Category
Article
ISSN
0166-8595

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✦ Synopsis

This minireview in memory of Daniel I. Arnon, pioneer in photosynthesis research, concerns properties of the first and still only known alternative photophosphorylation system, with respect to the primary phosphorylated end product formed. The alternative to adenosine triphosphate (ATP), inorganic pyrophosphate (PPi), was produced in light, in chromatophores from the photosynthetic bacterium Rhodospirillum rubrum, when no adenosine diphosphate (ADP) had been added to the reaction mixture (Baltscheffsky H et al. (1966) Science 153:1120-1122). This production of PPi and its capability to drive energy requiring reactions depend on the activity of a membrane bound inorganic pyrophosphatase (PPase) (Baltscheffsky M e t al.

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This work provides further evidence that plants contain appreciable amounts of inorganic pyrophosphate (PPi), and that breakdown of phosphoribosyl pyrophosphate (PPRibP) does not contribute significantly to the PPi detected in plant extracts. Inorganic pyrophosphate in extracts of the roots of Pisum