Enzymatic activities in cultured human lymphocytes that dephosphorylate dolichyl pyrophosphate and dolichyl phosphate |
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Authors: | J F Wedgwood J L Strominger |
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Abstract: | Enzymatic activities which dephosphorylate dolichyl phosphate (Dol-P) and dolichyl pyrophosphate (Dol-P-P) have been observed in membranes from cultured human lymphocytes. Neither activity requires divalent metals. Dol-P phosphatase is inhibited by inorganic phosphate but not by other phosphate-containing compounds. Dol-P-P phosphatase is inhibited by bacitracin but not by phosphate-containing compounds including the methylene analogue of pyrophosphate. These reactions are similar to those previously found in the cycle of bacterial wall peptidoglycan biosynthesis. A chemical synthesis of 32P]Dol-P and 32P]Dol-P-P is reported. |
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