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Comparative Study
. 1993 Sep 15;90(18):8352-6.
doi: 10.1073/pnas.90.18.8352.

Cloning, sequencing, and expression of the adenosylcobalamin-dependent ribonucleotide reductase from Lactobacillus leichmannii

S Booker  1 , J Stubbe
Affiliations
Comparative Study

Cloning, sequencing, and expression of the adenosylcobalamin-dependent ribonucleotide reductase from Lactobacillus leichmannii

S Booker et al. Proc Natl Acad Sci U S A. .

Abstract

Ribonucleoside-triphosphate reductase (RTPR, EC 1.17.4.2) from Lactobacillus leichmannii, a monomeric adenosylcobalamin-requiring enzyme, catalyzes the conversion of nucleoside triphosphates to deoxynucleoside triphosphates. The gene for this enzyme has been cloned and sequenced. In contrast to expectations based on mechanistic considerations, there is no statistically significant sequence homology with the Escherichia coli reductase that requires a dinuclear-iron center and tyrosyl radical cofactor. The RTPR has been overexpressed and purified to homogeneity, yielding 90 mg of protein from 2.5 g of bacteria. Initial characterization of the recombinant RTPR indicates that its properties are identical to those of the RTPR isolated from L. leichmannii.

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References

    1. Biochemistry. 1972 Jun 6;11(12):2378-88 - PubMed
    1. Adv Enzyme Regul. 1976;15:81-100 - PubMed
    1. Proc Natl Acad Sci U S A. 1977 Dec;74(12):5463-7 - PubMed
    1. Methods Enzymol. 1978;51:246-59 - PubMed
    1. Annu Rev Biochem. 1979;48:133-58 - PubMed

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