The multifunctional folic acid synthesis fas gene of Pneumocystis carinii appears to encode dihydropteroate synthase and hydroxymethyldihydropterin pyrophosphokinase. |
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Authors: | F Volpe M Dyer J G Scaife G Darby D K Stammers C J Delves |
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Affiliation: | Department of Molecular Sciences, Wellcome Research Laboratories, Kent, U.K. |
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Abstract: | We describe the cloning of a multifunctional folic acid synthesis (fas) gene from Pneumocystis carinii. The nucleotide sequence contains an open reading frame interrupted by three introns, that encodes a protein of 740 amino acids with an Mr of 97,278. The predicted Fas protein has homology to two enzyme domains, dihydropteroate synthase and 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase, both of which are involved in folate synthesis, and at least one other region of unknown function. |
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