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Articles by D Sheng
Total Records ( 1 ) for D Sheng
  D Sheng , J Jao , M Li , P Xu and J. Zhang

Apart from inhibiting RecA activity through protein–protein interactions, Deinococcus radiodurans RecX inhibits the expression of RecA and two other anti-oxidant proteins. To identify the repertoire of proteins regulated by RecX, comparative proteomic studies were undertaken on a wild-type strain (R1) and recX null mutant (RecX). Two-dimensional electrophoresis followed by MALDI-TOF identification revealed 35 differentially expressed proteins, including 12 up-regulated and 23 down-regulated proteins in the mutant. The 12 up-regulated proteins are DNA repair proteins, stress response proteins, and metabolism-related proteins. Most of these have been previously characterized as ionizing radiation-induced proteins. The 23 down-regulated proteins are mainly involved in cellular metabolism, and some of these are key enzymes in the metabolic pathway. Thus, RecX is suggested to be involved in the switch between DNA damage response and normal metabolism in D. radiodurans.

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