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From the
1 From the Department of Biological Chemistry, Washington University School of Medicine, Saint Louis, Missouri 63110
The synthesis of polyribitol phosphate by polyribitol phosphate polymerase from Staphylococcus aureus H proceeds by a single chain mechanism so that the enzyme completes a chain of approximately 30 units linked to lipoteichoic acid carrier, before starting a new chain. The lipoteichoic acid carrier of Staphylococcus aureus and Bacillus subtilis are interchangeable and can be used both for the synthesis of polyglycerolphosphate or polyribitol phosphate. Both of these polymers appear to be attached to the same site on the lipoteichoic acid carrier. Lipoteichoic acid carrier, active with the S. aureus polyribitolphosphate polymerase can be extracted from Bacillus licheniformis, Lactobacillus casei, Lactobacillus plantarum, Streptococcus faecalis, and Mycobacterium phlei but not from a variety of other microorganisms. No evidence has been found for the involvement of an additional carrier such as undecaprenol phosphate in polyribitol phosphate synthesis.
The Synthesis of Polyribitol Phosphate
II. ON THE MECHANISM OF POLYRIBITOL PHOSPHATE POLYMERASE
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