Modeling and protein function prediction of truncated form of geobacillus thermocatenulatus lipase (BTL2)

نویسندگان

  • M. A. Ghafouri
  • M. R. Azimi
  • B. Yakhchali
  • N. Goudarzi
چکیده

Motivations Lipases, mainly of microbial origin, represent the most widely used class of enzymes in biotechnological applications and organic chemistry. Bacterial lipases are members of the structural superfamily of / hydrolases that catalyze the hydrolysis and synthesis of a variety of acylglycerols at the lipid-water interface. Optimization of features and catalytic activity of lipases as the third industrial enzyme are significant for industrial applications. The structural comparison between / hydrolases and thermoalkalophilic lipases represented that the insertion of Zn2+ binding site ( 3, b1 and b2) has not, until now, been seen within the / hydrolase canonical fold that making a tight intramolecular interaction with the main catalytic domain. In this study, we investigated the role of Zn2+ binding site on lipase activity by using the computational methods.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Periplasmic expression of Bacillus thermocatenulatus lipase in Escherichia coli in presence of different signal sequences

Efforts to express lipase in the periplasmic space of Escherichia coli have so far been unsuccessful andmost of the expressed recombinant lipases accumulate in the insoluble cell fraction. To evaluate the role ofnative and heterologous signal peptides in translocation of the lipase across the inner membrane of E. coli,the lipase gene (btl2) was cloned downstream of the native ...

متن کامل

The Conserved Lid Tryptophan, W211, Potentiates Thermostability and Thermoactivity in Bacterial Thermoalkalophilic Lipases

We hypothesize that aggregation of thermoalkalophilic lipases could be a thermostability mechanism. The conserved tryptophans (W211, W234) in the lid are of particular interest owing to their previous involvements in aggregation and thermostability mechanisms in many other proteins. The thermoalkalophilic lipase from Bacillus thermocatenulatus (BTL2) and its mutants (W211A, W234A) were expresse...

متن کامل

Modifying the catalytic preference of tributyrin in Bacillus thermocatenulatus lipase through in-silico modeling of enzyme-substrate complex.

In this study, rational design for Bacillus thermocatenulatus lipase (BTL2) was carried out to lower the activation barrier for hydrolysis of short-chain substrates. In this design, we used computational models for the enzyme-substrate (ES) complexes of tributyrin (C4) and tricaprylin (C8), which were generated through docking and molecular dynamics (MD) simulations. These ES complexes were emp...

متن کامل

Conversion of Bacillus thermocatenulatus lipase into an efficient phospholipase with increased activity towards long-chain fatty acyl substrates by directed evolution and rational design.

The thermoalkalophilic lipase from Bacillus thermocatenulatus BTL2 exhibits a low phospholipase activity (lecithin/tributyrin ratio 0.03). A single round of random mutagenesis of the BTL2 gene followed by screening of 6000 transformants on egg-yolk plates identified three variants with 10-12-fold increased phospholipase activities, corresponding to lecithin/tributyrin ratios of 0.16-0.36. All v...

متن کامل

New Strategy for the Immobilization of Lipases on Glyoxyl–Agarose Supports: Production of Robust Biocatalysts for Natural Oil Transformation

Immobilization on Glyoxyl-agarose support (Gx) is one of the best strategies to stabilize enzymes. However, the strategy is difficult to apply at neutral pH when most enzymes are stable and, even when possible, produces labile derivatives. This work contributes to overcoming this hurdle through a strategy that combines solid-phase amination, presence of key additives, and derivative basificatio...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2015