Mycobacterium avium subspecies paratuberculosis ribosome (MAP ribosome) (MAP ribosome)

The Mycobacterium avium subspecies paratuberculosis (MAP) ribosome is the essential ribonucleoprotein complex responsible for protein synthesis in this slow-growing, acid-fast pathogen (NCBI Taxonomy ID: 1770). MAP is the primary causative agent of Johne's disease, a chronic granulomatous enteritis in ruminants, and has been extensively studied for its potential role in the pathogenesis of Crohn's disease in humans (PubMed: 25133067). The ribosome, consisting of the 30S and 50S subunits, serves as a critical therapeutic target for several classes of antibiotics, most notably macrolides and aminoglycosides (PubMed: 11483555). These drugs bind to specific sites on the ribosomal RNA or associated proteins to inhibit translation, thereby arresting bacterial growth or inducing cell death. Because MAP is an intracellular pathogen that can persist in a dormant state, targeting the ribosome effectively often requires prolonged, multi-drug therapeutic regimens to overcome challenges such as low metabolic activity and poor drug penetration into infected tissues (PubMed: 17569623). Effective treatment is further complicated by the organism's slow growth rate and the presence of thick, waxy cell walls that limit drug uptake. Research into the MAP ribosome also focuses on identifying unique structural features that could allow for the development of more selective inhibitors with fewer side effects.

Other names

Mycobacterium avium subsp. paratuberculosis ribosomeMAP 70S ribosomeJohne's disease bacillus ribosome

Inhibition of bacterial protein synthesis by binding to the 30S or 50S ribosomal subunits, which prevents the translocation of tRNA or causes misreading of the genetic code (PubMed: 11483555).