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The PE/PPE multigene family codes for approximately 10% of the Mycobacterium tuberculosis proteome and is encoded by 176 open reading frames. These proteins possess, and have been named after, the conserved proline-glutamate (PE) or proline-proline-glutamate (PPE) motifs at their N-terminus. Their genes have a conserved structure and repeat motifs that could be a potential source of antigenic variation...
About 10% of the coding capacity of the Mycobacterium tuberculosis (M. tb) genome is devoted to the PE/PPE family of genes scattered throughout the genome. We have identified 28 PE/PPE operons which are organized within the M. tb genome in such a way that most PE members are upstream to PPE members. One example of such a gene arrangement is the PPE gene Rv2430c, earlier shown by us to code for a highly...
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