A peptide fragment from the human COX3 protein disrupts association of Mycobacterium tuberculosisvirulence proteins ESAT-6 and CFP10, inhibits mycobacterial growth ... View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2014-12

AUTHORS

Sachin Kumar Samuchiwal, Sultan Tousif, Dhiraj Kumar Singh, Arun Kumar, Anamika Ghosh, Kuhulika Bhalla, Prem Prakash, Sushil Kumar, Maitree Bhattacharyya, Prashini Moodley, Gobardhan Das, Anand Ranganathan

ABSTRACT

BACKGROUND: Tuberculosis (TB) is one of the most prevalent infectious diseases affecting millions worldwide. The currently available anti-TB drugs and vaccines have proved insufficient to contain this scourge, necessitating an urgent need for identification of novel drug targets and therapeutic strategies. The disruption of crucial protein-protein interactions, especially those that are responsible for virulence in Mycobacterium tuberculosis - for example the ESAT-6:CFP10 complex - are a worthy pursuit in this direction. METHODS: We therefore sought to improvise a method to attenuate M. tuberculosis while retaining the latter's antigenic properties. We screened peptide libraries for potent ESAT-6 binders capable of dissociating CFP10 from ESAT-6. We assessed the disruption by a peptide named HCL2, of the ESAT-6:CFP10 complex and studied its effects on mycobacterial survival and virulence. RESULTS: We found that HCL2, derived from the human cytochrome c oxidase subunit 3 (COX3) protein, disrupts ESAT-6:CFP10 complex, binds ESAT-6 potently, disintegrates bacterial cell wall and inhibits extracellular as well as intracellular mycobacterial growth. In addition, an HCL2 expressing M. tuberculosis strain induces both Th1 and Th17 host protective responses. CONCLUSIONS: Disruption of ESAT-6:CFP10 association could, therefore, be an alternate method for attenuating M. tuberculosis, and a possible route towards future vaccine generation. More... »

PAGES

355

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/1471-2334-14-355

DOI

http://dx.doi.org/10.1186/1471-2334-14-355

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1008917195

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/24985537


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43 schema:description BACKGROUND: Tuberculosis (TB) is one of the most prevalent infectious diseases affecting millions worldwide. The currently available anti-TB drugs and vaccines have proved insufficient to contain this scourge, necessitating an urgent need for identification of novel drug targets and therapeutic strategies. The disruption of crucial protein-protein interactions, especially those that are responsible for virulence in Mycobacterium tuberculosis - for example the ESAT-6:CFP10 complex - are a worthy pursuit in this direction. METHODS: We therefore sought to improvise a method to attenuate M. tuberculosis while retaining the latter's antigenic properties. We screened peptide libraries for potent ESAT-6 binders capable of dissociating CFP10 from ESAT-6. We assessed the disruption by a peptide named HCL2, of the ESAT-6:CFP10 complex and studied its effects on mycobacterial survival and virulence. RESULTS: We found that HCL2, derived from the human cytochrome c oxidase subunit 3 (COX3) protein, disrupts ESAT-6:CFP10 complex, binds ESAT-6 potently, disintegrates bacterial cell wall and inhibits extracellular as well as intracellular mycobacterial growth. In addition, an HCL2 expressing M. tuberculosis strain induces both Th1 and Th17 host protective responses. CONCLUSIONS: Disruption of ESAT-6:CFP10 association could, therefore, be an alternate method for attenuating M. tuberculosis, and a possible route towards future vaccine generation.
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