Abstract
Radioactive amino acids, when added to isolated pea chloroplasts or chloroplast extracts engaged in protein synthesis, are incorporated into Rubisco large subunits that co-migrate with native Rubisco during nondenaturing electrophoresis. We have added the transition state analog 2′-carboxyarabinitol bisphosphate (CABP) to chloroplast extracts after in organello or in vitro incorporation of radioactive amino acids into Rubisco large subunits. Upon addition of CABP the radioactive bands co-migrating with native Rubisco undergo a readily detected shift in electrophoretic mobility just as the native enzyme, thus demonstrating the ability of the newly assembled molecules to interact with this transition state analog.
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Abbreviations
- CABP:
-
2-carboxyarabinitol 1,5-bisphosophate
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Acknowledgements
The authors thank Dr. Steve Gutteridge for suggesting this project. This research supported by grants from the United States Department of Agriculture NRICGP.
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Balaji, B., Gilson, M. & Roy, H. Binding of a Transition State Analog to Newly Synthesized Rubisco. Photosynth Res 89, 43–48 (2006). https://doi.org/10.1007/s11120-006-9067-7
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DOI: https://doi.org/10.1007/s11120-006-9067-7