CCMB Team Maps Protein Export System of Mycobacterium tuberculosis – New Drug Target Insight

Overview A research team from CCMB has charted the protein‑export machinery of the bacterium that causes TB . The work reveals how the pathogen moves proteins inside and outside its cells, a step essential for its growth, survival and disease‑causing ability. Key Developments Mapping of 92 components and ~200 reactions that constitute the protein‑transport network of Mtb . Identification of three major secretion routes: the general Sec pathway , the Tat system , and specialised ESX systems unique to mycobacteria. Use of CRISPR to silence SecA1 and Tat genes, leading to sharp decline in bacterial growth in culture and inside immune cells. Disruption of these pathways affected export of >100 proteins (SecA1) and ~140 proteins (Tat), causing cell‑membrane damage and leakage of intracellular proteins. Important Facts India accounts for ~25% of global TB cases and ~33% of drug‑resistant TB, as highlighted in the WHO Global TB Report 2025 . Drug‑resistant TB requires prolonged multi‑drug regimens, making new drug targets critical. The study appears in the peer‑reviewed journal Molecular & Cellular Proteomics . UPSC Relevance The findings intersect with several UPSC syllabus points: public‑health challenges (GS1‑Health), the role of scientific institutions in disease control (GS3‑Science & Technology), and the impact of drug‑resistance on health policy. Understanding bacterial protein‑secretion systems helps aspirants grasp why novel drug targets are needed beyond conventional antibiotics. Way Forward Further work is required to convert the identified proteins into drug candidates. Collaboration between molecular biologists, chemists and pharmaceutical firms will be essential. Policymakers should encourage funding for translational research and fast‑track clinical trials to address India’s high burden of drug‑resistant TB.