Mar 1, 1984

Construction of shuttle vectors capable of conjugative transfer from Escherichia coli to nitrogen-fixing filamentous cyanobacteria

Proceedings of the National Academy of Sciences of the United States of America
C Peter WolkJ Elhai

Abstract

Wild-type cyanobacteria of the genus Anabaena are capable of oxygenic photosynthesis, differentiation of cells called heterocysts at semiregular intervals along the cyanobacterial filaments, and aerobic nitrogen fixation by the heterocysts. To foster analysis of the physiological processes characteristic of these cyanobacteria, we have constructed a family of shuttle vectors capable of replication and selection in Escherichia coli and, in unaltered form, in several strains of Anabaena. Highly efficient conjugative transfer of these vectors from E. coli to Anabaena is dependent upon the presence of broad host-range plasmid RP-4 and of helper plasmids. The shuttle vectors contain portions of plasmid pBR322 required for replication and mobilization, with sites for Anabaena restriction enzymes deleted; cyanobacterial replicon pDU1, which lacks such sites; and determinants for resistance to chloramphenicol, streptomycin, neomycin, and erythromycin.

Mentioned in this Paper

Shuttle Vectors
Erythromycin
Alkalescens-Dispar Group
Nitrogen Fixation
Enzymes, antithrombotic
Streptomycin
Cell Differentiation Process
Replicon
Anabaena
Enzymes for Treatment of Wounds and Ulcers

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