title: Cloning and expression of the enzymatic region of Streptococcal hyaluronidase.
abstract: OBJECTIVE
  Streptococcus pyogenes produces extracellular hyaluronidase enzyme. This enzyme is directly associated with the spread of the organism during infection. The objective of the present study was to clone and express the nucleotide sequence of the enzyme which is involved in hyaluronidase enzymatic activity.
  
  
  METHODS
  The enzymatic region of hyaluronidase gene was detected by bioinformatics method. The PCR method was used to amplify enzymatic region of hyaluronidase gene from chromosomal DNA of Streptococcus pyogenes. The eluted product was cloned into the prokaryotic expression vector pET32a which was digested by BamHI and HindIII restriction endonuclease enzymes. The target protein was expressed in the Escherichia coli. The bacteria including pET32a-hylA (hylA is abbreviation of Streptococcus pyogenes hyaluronidase gene and hylA is abbreviation of Streptococcus pyogenes hyaluronidase protein) plasmids were induced by IPTG and analyzed by SDS-PAGE. The enzymatic evaluation and antigenicity was finally studied.
  
  
  RESULTS
  Enzymes digestion analysis, sequencing results showed that the target gene (1296 base pair) was inserted correctly into the recombinant vector. The expressed protein (65 KDa) was purified successfully via affinity chromatography. Data also indicated that enzymatic region of hyaluronidase protein from Streptococcus pyogenes was recognized in all 5 patient's sera.
  
  
  CONCLUSIONS
  In general, it is possible to produce the enzymatic regions of the Streptococcus pyogenes hyaluronidase in E. coli. The antigenic property of the produced protein is well retained. Considering the product's domestic demand and also low efficiency of production and pathogenicity of Streptococcus species, it is possible to produce it as recombinant product.
authors.affiliation: Department of Microbiology, Science and Research Branch, Islamic Azad University, Arak Branch, Arak, Iran.
authors.forename: Nafiseh Al-Sadat
authors.initials: NA
authors.lastname: Mirjamali
authors.affiliation: Biology Department, Payame Noor University, Arak, Iran.
authors.forename: Safieh
authors.initials: S
authors.lastname: Soufian
authors.affiliation: Molecular and Medicine Research Center, Department of Microbiology, School of Medicine, Arak University of Medical Sciences, Arak, Iran.
authors.forename: Neda
authors.initials: N
authors.lastname: Molaee
authors.affiliation: Molecular and Medicine Research Center, Department of Microbiology, School of Medicine, Arak University of Medical Sciences, Arak, Iran.
authors.forename: Shabnam Sadoogh
authors.initials: SS
authors.lastname: Abbasian
authors.affiliation: Molecular and Medicine Research Center, Department of Microbiology, School of Medicine, Arak University of Medical Sciences, Arak, Iran.
authors.forename: Hamid
authors.initials: H
authors.lastname: Abtahi
keywords: Gene expression; Hemolytic streptococci; Hyaluronidase