Partitioning of Bromelain from Pineapple Stem (Smooth Cayenne) by Aqueous Two Phase System and Its Application for Recovery and Purification of Polyhydroxyalkanoate

Bromelain from pineapple stem was extracted using aqueous two phase system (ATPs). In addition, the application of bromelain for recovery and purification of polyhydroxyalkanoate (PHA) was also investigated. The optimal condition for bromelain partitioning was 15% polyethylene glycol (PEG)4000-20%K2...

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Main Authors: Kanokphorn Sangkharak, Piyaporn Wangsirikul, Nisa Pichid, Tewan Yunu, Poonsuk Prasertsan
Format: บทความวารสาร
Language:English
Published: Science Faculty of Chiang Mai University 2019
Online Access:http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=7066
http://cmuir.cmu.ac.th/jspui/handle/6653943832/63775
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spelling th-cmuir.6653943832-637752019-05-07T09:57:17Z Partitioning of Bromelain from Pineapple Stem (Smooth Cayenne) by Aqueous Two Phase System and Its Application for Recovery and Purification of Polyhydroxyalkanoate Kanokphorn Sangkharak Piyaporn Wangsirikul Nisa Pichid Tewan Yunu Poonsuk Prasertsan Bromelain from pineapple stem was extracted using aqueous two phase system (ATPs). In addition, the application of bromelain for recovery and purification of polyhydroxyalkanoate (PHA) was also investigated. The optimal condition for bromelain partitioning was 15% polyethylene glycol (PEG)4000-20%K2HPO4. The highest activity recovery (80.14%) and enzyme purity was increased to 1.84-folds under optimal condition. The molecular weight of bromelain was 29 kDa. Bromelain yielded the highest activity when incubated with buffer pH 6.0 under 45°C. After purification and precipitation, the bromelain optimal pH changed from 6.0 to 7.0 and its optimum temperature was 50°C, however it kept activity even after 60°C. The activity of bromelain showed higher stability at pH 7.0-8.0 and was slightly stable at all pH levels tested. Its activity also decreased continuously with an increase of NaCl concentration. Partially purified bromelain was applied to recovery and purification of PHA from PHA-accumulating bacteria. The experiment was determined in 5 bacteria including both Gram-positive and Gram-negative strains. The result showed that bromelain was suitable for PHA purification. High PHA purity (82.7-96.5%) was observed in Gram-negative bacteria. The results were also compared with commercial bromelain. The lower efficiency was obtained from partially purified enzyme, but the content was not significantly different. 2019-05-07T09:57:17Z 2019-05-07T09:57:17Z 2016 บทความวารสาร 0125-2526 http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=7066 http://cmuir.cmu.ac.th/jspui/handle/6653943832/63775 Eng Science Faculty of Chiang Mai University
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description Bromelain from pineapple stem was extracted using aqueous two phase system (ATPs). In addition, the application of bromelain for recovery and purification of polyhydroxyalkanoate (PHA) was also investigated. The optimal condition for bromelain partitioning was 15% polyethylene glycol (PEG)4000-20%K2HPO4. The highest activity recovery (80.14%) and enzyme purity was increased to 1.84-folds under optimal condition. The molecular weight of bromelain was 29 kDa. Bromelain yielded the highest activity when incubated with buffer pH 6.0 under 45°C. After purification and precipitation, the bromelain optimal pH changed from 6.0 to 7.0 and its optimum temperature was 50°C, however it kept activity even after 60°C. The activity of bromelain showed higher stability at pH 7.0-8.0 and was slightly stable at all pH levels tested. Its activity also decreased continuously with an increase of NaCl concentration. Partially purified bromelain was applied to recovery and purification of PHA from PHA-accumulating bacteria. The experiment was determined in 5 bacteria including both Gram-positive and Gram-negative strains. The result showed that bromelain was suitable for PHA purification. High PHA purity (82.7-96.5%) was observed in Gram-negative bacteria. The results were also compared with commercial bromelain. The lower efficiency was obtained from partially purified enzyme, but the content was not significantly different.
format บทความวารสาร
author Kanokphorn Sangkharak
Piyaporn Wangsirikul
Nisa Pichid
Tewan Yunu
Poonsuk Prasertsan
spellingShingle Kanokphorn Sangkharak
Piyaporn Wangsirikul
Nisa Pichid
Tewan Yunu
Poonsuk Prasertsan
Partitioning of Bromelain from Pineapple Stem (Smooth Cayenne) by Aqueous Two Phase System and Its Application for Recovery and Purification of Polyhydroxyalkanoate
author_facet Kanokphorn Sangkharak
Piyaporn Wangsirikul
Nisa Pichid
Tewan Yunu
Poonsuk Prasertsan
author_sort Kanokphorn Sangkharak
title Partitioning of Bromelain from Pineapple Stem (Smooth Cayenne) by Aqueous Two Phase System and Its Application for Recovery and Purification of Polyhydroxyalkanoate
title_short Partitioning of Bromelain from Pineapple Stem (Smooth Cayenne) by Aqueous Two Phase System and Its Application for Recovery and Purification of Polyhydroxyalkanoate
title_full Partitioning of Bromelain from Pineapple Stem (Smooth Cayenne) by Aqueous Two Phase System and Its Application for Recovery and Purification of Polyhydroxyalkanoate
title_fullStr Partitioning of Bromelain from Pineapple Stem (Smooth Cayenne) by Aqueous Two Phase System and Its Application for Recovery and Purification of Polyhydroxyalkanoate
title_full_unstemmed Partitioning of Bromelain from Pineapple Stem (Smooth Cayenne) by Aqueous Two Phase System and Its Application for Recovery and Purification of Polyhydroxyalkanoate
title_sort partitioning of bromelain from pineapple stem (smooth cayenne) by aqueous two phase system and its application for recovery and purification of polyhydroxyalkanoate
publisher Science Faculty of Chiang Mai University
publishDate 2019
url http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=7066
http://cmuir.cmu.ac.th/jspui/handle/6653943832/63775
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