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Sequence and expression of the gene for N10-formyltetrahydrofolate synthetase from Clostridium cylindrosporum

✍ Scribed by Carolyn A. Rankin; Gale C. Haslam; Richard H. Himes


Publisher
Cold Spring Harbor Laboratory Press
Year
2008
Tongue
English
Weight
798 KB
Volume
2
Category
Article
ISSN
0961-8368

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✦ Synopsis


Abstract

Sau3 A and Hind III restriction fragments of Clostridium cylindrosporum genomic DNA were used to isolate clones containing 80% of the N^10^‐H~4~folate synthetase gene in a 5β€² fragment and the remaining 20% of the gene in the 3β€² fragment. These fragments were joined at a common SnaB I restriction site and expressed in Escherichia coli at a level equivalent to what is normally found in C. cylindrosporum. Sequence comparisons show a large degree of homology with genes from two other clostridial species, including a thermophile. Certain conserved sequences found in the three clostridial proteins and in the N^10^‐H~4~folate synthetase portion of eukaryotic Cl‐H~4~folate synthases may represent consensus sequences for nucleotide and H~4~folate binding.


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