Mycobacterial PE, PPE and ESX clusters: novel insights into the secretion of these most unusual protein families

Abstract excerpt

The human pathogen Mycobacterium tuberculosis harbours a large number of genes that encode proteins whose N-termini contain the characteristic motifs Pro-Glu (PE) or Pro-Pro-Glu (PPE). A subgroup of the PE proteins contains polymorphic GC-rich sequences (PGRS), while a subgroup of the PPE proteins contains major polymorphic tandem repeats (MPTR). The function of most of these proteins remains unknown. However, in...

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