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. 1988 Oct;170(10):4608–4612. doi: 10.1128/jb.170.10.4608-4612.1988

Analysis and characterization of the folates in the nonmethanogenic archaebacteria.

R H White 1
PMCID: PMC211499  PMID: 3139633

Abstract

A detailed analysis of the folate coenzymes in the nonmethanogenic archaebacteria has been performed. By using the Lactobacillus casei microbiological assay for folates, the levels of folates in Sulfolobus solfataricus and Sulfolobus acidocaldarius were found to be 3.7 and 8.3 ng/g (dry weight) of cells, respectively, compared with 88,000 and 28,000 ng/g (dry weight) of cells in Halobacterium halobium and Halobacterium strain GN-1, respectively. The levels of folates found in the Sulfolobus spp. were approximately 100 times less than those found in the typical eubacterium, whereas the levels in the halobacteria were approximately 10 times higher. The folate in Sulfolobus solfataricus was shown to consist of only 5-formyltetrahydropteroylglutamate, and the folate in Halobacterium strain GN-1 was shown to consist of only pteroyldiglutamate. The low folate levels in the Sulfolobus spp. are the same as those found in the methanogenic bacteria, suggesting that another C1 carrier may function in these cells.

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Selected References

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