Bacitracin blocks the transport of nag and nam across the cytoplasmic membrane to the cell wall. Like other antimicrobials that block cell wall synthesis, this would result in weak cell walls and cell lysis. Antimicrobilas that act by inhibiting cell wall synthesis include beta-lactams, vancomycin and cycloserine and isoniazid and ethambutol among others. They prevent bacteria from increasing amount of peptidoglycan, they have no effect on existing peptodoglycan layer and therefore are effective only for growing cells.
The protein involved in elongation of Bacillus Antrasis to form its typical shape is called FtsZ. FtsZ is a GTpase that polymerises in nucleotide dependent manner head to tail to form a single stranded filaments that assemble into a contractible ring.
