بدون زمان بندی
نویسندگان: Azam Roohi, Mohammad Reza Housaindokht, Mohammad vakili
زمان بندی: بدون زمان بندی
برچسب: Nanocomputation and Modeling
خلاصه مقاله: Fungal laccases are industrially important enzymes, that....
Fungal laccases are industrially important enzymes, that have great potential as biocatalysts oxidizing a variety of aromatic compounds using water as the sole by-product. In this work, Trametes versicolor laccase (TvL) enzyme, including nine N-acetyl D-glucosamines (NAG) which are attached to the protein scaffold on the six positions via the glycosidic bonds. No other type of sugars was found in contrast to other fungal laccases. Removal of N-glycans from TvL leads to increase the hydrophobicity of the enzyme, as well as the reduction of stability and the catalytic reactions. However, due to the lack of the proper force field for the glycans, they are ignored in the theoretical studies. The present study aims to assess the effects of the N-glycan structure, stability and activity of TvL through the simulation of the native and the deglycosylated structures. Molecular dynamics (MD) simulation results reveal that the removal of N-glycans increases the number of the cavities from eleven to sixteen. However, the removal of glycans is associated with reducing the channels providing the substrate access. The removal of the N-glycan segments induces the significant changes in the flexibility of the residues that affect the enzyme activitie.