Shivakumar_2011_Appl.Biochem.Biotechnol_164_1225

Reference

Title : Purification, characterization and kinetic studies of a novel poly(beta) hydroxybutyrate (PHB) depolymerase PhaZ(Pen) from Penicillium citrinum S2 - Shivakumar_2011_Appl.Biochem.Biotechnol_164_1225
Author(s) : Shivakumar S , Jagadish SJ , Zatakia H , Dutta J
Ref : Appl Biochem Biotechnol , 164 :1225 , 2011
Abstract :

A fungal isolate, identified as Penicillium citrinum S2, produced approximately 1 U/mL of PHB depolymerase by 72 h when grown in BHM containing 0.2%, w/v PHB, pH 6.0 at 30 degrees C. Partial purification of an extracellular poly(-beta-)hydroxybutyrate (PHB) depolymerase PhaZ( Pen ) from P. citrinum S2 by two steps using ammonium sulphate (80% saturation) and affinity chromatography using concanavalin A yielded 16.18-fold purity and 21.53% recovery of protein. The enzyme was composed of three polypeptide chains of 66, 43 and 20 kDa, respectively, as determined by sodium dodecyl sulphate-polyacrylamide gel electrophoresis. All the three bands stained positive for glycoprotein by PAS staining. Optimum enzyme activity was detected at pH 6.0 and 50 degrees C. The enzyme was stable between pH 4.0 and 7.0 at 50 degrees C, 2 h. beta-hydroxybutyrate monomer was detected as the major end product of PHB hydrolysis. The enzyme also showed distinct behaviour towards different inhibitors tested, which suggests the role of serine, serine residue, carboxyl group, tyrosine and sulfhydryl groups in its active site.

PubMedSearch : Shivakumar_2011_Appl.Biochem.Biotechnol_164_1225
PubMedID: 21369777

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Citations formats

Shivakumar S, Jagadish SJ, Zatakia H, Dutta J (2011)
Purification, characterization and kinetic studies of a novel poly(beta) hydroxybutyrate (PHB) depolymerase PhaZ(Pen) from Penicillium citrinum S2
Appl Biochem Biotechnol 164 :1225

Shivakumar S, Jagadish SJ, Zatakia H, Dutta J (2011)
Appl Biochem Biotechnol 164 :1225