The essential tacF gene is responsible for the choline-dependent growth phenotype of Streptococcus pneumoniae.

Abstract excerpt

Streptococcus pneumoniae has an absolute nutritional requirement for choline, and the choline molecules are known to incorporate exclusively into the cell wall and membrane teichoic acids of the bacterium. We describe here the isolation of a mutant of strain R6 in which a single G-->T point mutation in the gene tacF (formerly designated spr1150) is responsible for generating a choline-independent phenotype. The...

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