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Science 25 June 1976:
Vol. 192. no. 4246, pp. 1343 - 1344
DOI: 10.1126/science.818711
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Articles

Science, Vol 192, Issue 4246, 1343-1344
Copyright © 1976 by American Association for the Advancement of Science

articles

Ribonucleotide reductase in blue-green algae: dependence on adenosylcobalamin

FK Gleason and JM Wood

Ten species of freshwater blue-green algae exhibit an adenosylcobalamin-dependent ribonucleotide reductase, thuse explaining the requirement for cobalt by these organisms. The evidence suggests a phylogenetic affinity between the cyanophytes and bacteria, such as Clostridium and Rhizobium, and the euglenoid flagellates, which also use the cofactor-dependent reductase. In contrast, the ribonucleotide reductase reaction in the few green algae surveyed shows no dependence on cobalamins.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Isolation of the Gene for the B12-Dependent Ribonucleotide Reductase from Anabaena sp. Strain PCC 7120 and Expression in Escherichia coli.
F. K. Gleason and N. E. Olszewski (2002)
J. Bacteriol. 184, 6544-6550
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