Poly-β-hydroxybutyrate (PHB) Depolymerase from Fusarium solani Thom
Author
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-08-16
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Fusarium solani Thom produced maximum PHB depolymerase by 48 h when grown in BHM containing 0.2%, w/v PHB, pH 8.0 at 25°C.
Statistical optimization studies using Plackett Burman design of PHB depolymerase production yielded maximum PHB depolymerase activity after 2 days as against 4 days in the unoptimized conditions with a 2-fold increase in activity.
Partial purification of the extracellular poly-β-hydroxybutyrate (PHB) depolymerase PHAZFus from F.
solani Thom by two steps using ammonium sulphate (80% saturation) and affinity chromatography using concanavalin-A yielded 162.3-fold purity and 63% recovery of protein.
The enzyme composed of a single polypeptide chain of 85 KDa, as determined by SDS-PAGE.
The enzyme stained positive for glycoprotein by PAS staining.
Optimum enzyme activity was detected at pH 7.0 and 55°C.
The enzyme was stable at pH 7.0 and 55°C for 24 h with a residual activity of almost 85%.
Paper chromatography revealed β-hydroxybutyrate monomer as the major end product of PHB hydrolysis.
Complete inhibition of the enzyme by 1 mM HgCl2 (100%) indicated the importance of essential disulfide bonds (cystine residues) for enzyme activity or probably for maintaining the native enzyme structure.
American Psychological Association (APA)
Shivakumar, Srividya. 2012. Poly-β-hydroxybutyrate (PHB) Depolymerase from Fusarium solani Thom. Journal of Chemistry،Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-469581
Modern Language Association (MLA)
Shivakumar, Srividya. Poly-β-hydroxybutyrate (PHB) Depolymerase from Fusarium solani Thom. Journal of Chemistry No. 2013 (2013), pp.1-9.
https://search.emarefa.net/detail/BIM-469581
American Medical Association (AMA)
Shivakumar, Srividya. Poly-β-hydroxybutyrate (PHB) Depolymerase from Fusarium solani Thom. Journal of Chemistry. 2012. Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-469581
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-469581