Structural analysis of Sub16 sedolisin of Trichophyton rubrum reveals a flexible nature of its pro domain
Latka, C.; Bikshapathi, J.; Aggarwal, P.; Bhavesh, N. S.; Chakraborty, R.; Khan, S. H.; Taneja, B.
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Trichophyton rubrum is one of the leading causes of superficial skin infections worldwide. It is a keratinolytic fungus specialized in colonization of keratinized tissue of skin, hair and nails for long periods of time. The fungus encodes a wide repertoire of secreted proteases in its genome that not only aid in nutrient acquisition but also establishment of infection on the host. The proteases are synthesized in prepro form that requires removal of the prosegment for activation. In order to gain insights into the structural association of the pro domain with the catalytic domain, we investigate the structural features of the pro domain of the secreted sedolisin member Sub16 of T. rubrum. Our results show that the pro domain of Sub16 may have inherent flexibility in the absence of the associated catalytic domain which is stabilized in complex with catalytic domain. This is the first report of structural investigation on a stand-alone pro domain of sedolisin family of subtilases that will help in design of further structural studies of this protein.
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