The first protein map of Synechococcus sp. strain PCC 7942 |
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Authors: | O A Koksharova Johan Klint Ulla Rasmussen |
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Institution: | (1) Vavilov Institute of General Genetics, Russian Academy of Sciences, ul. Gubkina, 3, 119991 Moscow, Russia;(2) Department of Botany, Stockholm University, SE-106 91 Stockholm, Sweden |
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Abstract: | The first protein map was developed of Synechococcus sp. strain PCC 7942, a model organism for studies of photosynthesis, prokaryotic circadian rhythms, cell division, carbon-concentrating mechanisms, and adaptive responses to a variety of stresses. The proteome was analyzed by two-dimensional gel electrophoresis with subsequent MALDI-TOF mass spectroscopy and database analysis. Of the 140 analyzed protein spots, 110 were successfully identified as 62 different proteins, many of which occurred as multiple spots on the gel. The identified proteins participate in the major metabolic and cellular processes in cyanobacterial cells during the exponential growth phase. In addition, 14 proteins which were previously either unknown or considered to be hypothetical were shown to be true gene products in Synechococcus sp. strain PCC 7942. These results may be helpful for the annotation of the recently sequenced genome of this cyanobacterium, as well as for biochemical and physiological studies of Synechococcus. |
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Keywords: | cyanobacteria MALDI-TOF/MS proteins proteomics two-dimensional gel electrophoresis |
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