Dataset Information

Single Step Purification of Novel Thermostable and Chelator Resistant Amylase from BacillusLicheniformis RM44 by Affinity Chromatography.

ABSTRACT: Bacillus licheniformis RM44 was isolated from hot spring near Karachi and screened for the production of extracellular amylase Amy RM44. Amy RM44 was purified to homogeneity on a single step by affinity chromatography using insoluble corn starch. The molecular weight of Amy RM44 was estimated to be 66 kDa by SDS-PAGE and zymographic analysis. Nine fold purification was achieved with the specific activity of 870 U/mg that provides the total yield of the enzyme up to 31%. Studies on purified AmyRM44 characterization revealed that the optimum temperature of enzyme was 100 ºC. Amy RM44 was proved to be highly thermostable as it retained 50% activity after 2 h at 100 ºC. Amy RM44 was stable over wide range of pH with optimum activity at pH 5. Enzyme activity was not significantly inhibited by SDS and EDTA. Amy RM44 also exhibited its activity towards various carbohydrates such as dextrin, pullulan, ?-cyclodextrin, ?-cyclodextrin, and ?-cyclodextrin.

SUBMITTER: Siddiqui A

PROVIDER: S-EPMC5610767 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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Single Step Purification of Novel Thermostable and Chelator Resistant Amylase from BacillusLicheniformis RM44 by Affinity Chromatography.

Siddiqui Ayesha A Kamal Mustafa M Ayatollahi Seyed Abdulmajid SA Ali Mohsin M Ahmed Mansoor M

Iranian journal of pharmaceutical research : IJPR 20170101 3

Bacillus licheniformis RM44 was isolated from hot spring near Karachi and screened for the production of extracellular amylase Amy RM44. Amy RM44 was purified to homogeneity on a single step by affinity chromatography using insoluble corn starch. The molecular weight of Amy RM44 was estimated to be 66 kDa by SDS-PAGE and zymographic analysis. Nine fold purification was achieved with the specific activity of 870 U/mg that provides the total yield of the enzyme up to 31%. Studies on purifie ...[more]

PMID: 29201100

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Project description:BACKGROUND: Affinity chromatography is one of the most efficient protein purification strategies. This technique comprises a one-step procedure with a purification level in the order of several thousand-fold, adaptable for various proteins, differentiated in their size, shape, charge, and other properties. The aim of this work was to verify the possibility of applying affinity chromatography in bacteriophage purification, with the perspective of therapeutic purposes. T4 is a large, icosahedral phage that may serve as an efficient display platform for foreign peptides or proteins. Here we propose a new method of T4 phage purification by affinity chromatography after its modification with affinity tags (GST and Histag) by in vivo phage display. As any permanent introduction of extraneous DNA into a phage genome is strongly unfavourable for medical purposes, integration of foreign motifs with the phage genome was not applied. The phage was propagated in bacteria expressing fusions of the phage protein Hoc with affinity tags from bacterial plasmids, independently from the phage expression system. RESULTS: Elution profiles of phages modified with the specific affinity motifs (compared to non-specific phages) document their binding to the affinity resins and effective elution with standard competitive agents. Non-specific binding was also observed, but was 102-105 times weaker than the specific one. GST-modified bacteriophages were also effectively released from glutathione Sepharose by proteolytic cleavage. The possibility of proteolytic release was designed at the stage of expression vector construction. Decrease in LPS content in phage preparations was dependent on the washing intensity; intensive washing resulted in preparations of 11-40 EU/ml. CONCLUSIONS: Affinity tags can be successfully incorporated into the T4 phage capsid by the in vivo phage display technique and they strongly elevate bacteriophage affinity to a specific resin. Affinity chromatography can be considered as a new phage purification method, appropriate for further investigations and development.

Dataset Information

Single Step Purification of Novel Thermostable and Chelator Resistant Amylase from BacillusLicheniformis RM44 by Affinity Chromatography.

Publications

Single Step Purification of Novel Thermostable and Chelator Resistant Amylase from <i>Bacillus</i><i>Licheniformis</i> RM44 by Affinity Chromatography.

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