Activation of Candida rugosa lipase at alkane–aqueous interfaces: A molecular dynamics study

FEBS Letters - Tập 581 - Trang 4377-4383 - 2007
Jayasundar Jayant James1, Baddireddi Subadhra Lakshmi1, Aswin Sai Narain Seshasayee1, Pennathur Gautam1
1Centre for Biotechnology, Anna University, Chennai 600025, India

Tóm tắt

The effect of solvent hydrophobicity on activation of Candida rugosa lipase (CRL) was investigated by performing molecular dynamics simulations for four nano seconds (ns). The closed/inactive conformer of CRL (PDB code 1TRH) was solvated in three alkane–aqueous environments. The alkanes aggregated in a predominantly aqueous environment and by 1 ns a stable spherical alkane–aqueous interface had formed. This led to the interfacial activation of CRL. On analyzing the simulated conformers with the closed conformer of CRL, the flap was found to have opened from a closed state by 7.7 Å, 10.2 Å, 13.1 Å at hexane–aqueous, octane–aqueous, and decane–aqueous interfaces. Further, essential dynamics analysis revealed that major anharmonic fluctuations were confined to residues 64–81, the flap of CRL.

Tài liệu tham khảo

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FEBS Letters

Tập 581

4377-4383

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