SUFU and tuberculosis: Interestingly, Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis (TB) that still kills 1.5 billion people annually, contains a single gene cluster with homology to the SUF system, Rv1460(sufR), Rv1461(sufB), Rv1462(sufD), Rv1463(sufC), Rv1464(sufS), Rv1465(sufU), and Rv1466(sufT) (Figure 1) [6,7].