title: Cloning, Purification and Characterization of the Collagenase ColA Expressed by Bacillus cereus ATCC 14579.
abstract: Bacterial collagenases differ considerably in their structure and functions. The collagenases ColH and ColG from Clostridium histolyticum and ColA expressed by Clostridium perfringens are well-characterized collagenases that cleave triple-helical collagen, which were therefore termed as ´true´ collagenases. ColA from Bacillus cereus (B. cereus) has been added to the collection of true collagenases. However, the molecular characteristics of B. cereus ColA are less understood. In this study, we identified ColA as a secreted true collagenase from B. cereus ATCC 14579, which is transcriptionally controlled by the regulon phospholipase C regulator (PlcR). B. cereus ATCC 14579 ColA was cloned to express recombinant wildtype ColA (ColAwt) and mutated to a proteolytically inactive (ColAE501A) version. Recombinant ColAwt was tested for gelatinolytic and collagenolytic activities and ColAE501A was used for the production of a polyclonal anti-ColA antibody. Comparison of ColAwt activity with homologous proteases in additional strains of B. cereus sensu lato (B. cereus s.l.) and related clostridial collagenases revealed that B. cereus ATCC 14579 ColA is a highly active peptidolytic and collagenolytic protease. These findings could lead to a deeper insight into the function and mechanism of bacterial collagenases which are used in medical and biotechnological applications.
authors: Department of Molecular Biology, Division of Microbiology, Paris-Lodron University of Salzburg, Salzburg, Austria.
authors: Carmen M
authors: CM
authors: Abfalter
authors: Department of Molecular Biology, Division of Structural Biology, Paris-Lodron University of Salzburg, Salzburg, Austria.
authors: Esther
authors: E
authors: Schönauer
authors: Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai, India.
authors: Karthe
authors: K
authors: Ponnuraj
authors: Department of Molecular Biology, Division of Microbiology, Paris-Lodron University of Salzburg, Salzburg, Austria.
authors: Markus
authors: M
authors: Huemer
authors: Department of Molecular Biology, Division of Allergy and Immunology, Paris-Lodron University of Salzburg, Salzburg, Austria.
authors: Gabriele
authors: G
authors: Gadermaier
authors: Department of Molecular Biology, Division of Chemistry and Bioanalytics, Paris-Lodron University of Salzburg, Salzburg, Austria.
authors: Christof
authors: C
authors: Regl
authors: Department of Molecular Biology, Division of Allergy and Immunology, Paris-Lodron University of Salzburg, Salzburg, Austria.
authors: Peter
authors: P
authors: Briza
authors: Department of Molecular Biology, Division of Allergy and Immunology, Paris-Lodron University of Salzburg, Salzburg, Austria.
authors: Fatima
authors: F
authors: Ferreira
authors: Department of Molecular Biology, Division of Chemistry and Bioanalytics, Paris-Lodron University of Salzburg, Salzburg, Austria.
authors: Christian G
authors: CG
authors: Huber
authors: Department of Molecular Biology, Division of Structural Biology, Paris-Lodron University of Salzburg, Salzburg, Austria.
authors: Hans
authors: H
authors: Brandstetter
authors: Department of Molecular Biology, Division of Microbiology, Paris-Lodron University of Salzburg, Salzburg, Austria.
authors: Gernot
authors: G
authors: Posselt
authors: Department of Molecular Biology, Division of Microbiology, Paris-Lodron University of Salzburg, Salzburg, Austria.
authors: Silja
authors: S
authors: Wessler
mesh_terms: D000595:Amino Acid Sequence; D001409:Bacillus cereus / Q000235:genetics / Q000378:metabolism*; D003001:Cloning, Molecular; D017364:Collagenases / Q000235:genetics / Q000378:metabolism*; D005798:Genes, Bacterial
chemical_list: D017364:Collagenases