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. 1991 Aug;173(15):4893–4896. doi: 10.1128/jb.173.15.4893-4896.1991

Primary structure, expression in Escherichia coli, and properties of S-adenosyl-L-methionine:uroporphyrinogen III methyltransferase from Bacillus megaterium.

C Robin 1, F Blanche 1, L Cauchois 1, B Cameron 1, M Couder 1, J Crouzet 1
PMCID: PMC208169  PMID: 1906874

Abstract

A Bacillus megaterium DNA fragment encoding S-adenosyl-L-methionine:uroporphyrinogen III methyltransferase (SUMT) activity was subcloned and sequenced. The encoded polypeptide showed more than 43.5% strict homology to Pseudomonas denitrificans SUMT (F. Blanche, L. Debussche, D. Thibaut, J. Crouzet, and B. Cameron, J. Bacteriol. 171:4222-4231, 1989). The B. megaterium polypeptide was overexpressed in Escherichia coli, partially purified, and shown to exhibit, like P. denitrificans SUMT, substrate inhibition at uroporphyrinogen III concentrations above 0.5 microM, suggesting a common regulation for aerobic cobalamin-producing organisms.

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Selected References

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