title: Production, purification and characterization of serraticin A, a novel cold-active antimicrobial produced by Serratia proteamaculans 136.
abstract: OBJECTIVE
  This study focuses on the production, purification and characterization of serraticin A, a novel cold-active antimicrobial produced by Serratia proteamaculans 136.
  
  
  RESULTS
  A Ser. proteamaculans strain producing a novel cold-active antimicrobial was isolated from Isla de los Estados, Argentina. Antimicrobial production was optimized in a BIOFLO 101 bioreactor under batch culture mode, with temperature, pH and dissolved oxygen controlled conditions. A purification protocol was developed including activated charcoal adsorption, solid-phase C18 extraction (SPE) and semi-preparative HPLC. The molecular weight was determined by LC/QTOF/MS/MS mass analysis.
  
  
  CONCLUSIONS
  Serratia proteamaculans 136 produces a cold-active low molecular bacteriocin-like compound named serraticin A. In this work, it has been laboratory-scale produced, purified and partially characterized. Cross-immunity test revealed that serraticin A is very different from other well-known microcins assayed, with a wide inhibitory spectrum, showing an interesting biotechnology potential to be applied as a control agent against pathogenic bacteria.
  
  
  CONCLUSIONS
  The present study is the first report of a cold-active compound with antimicrobial activity from Ser. proteamaculans. The work also highlights that cold environments could be a suitable source of micro-organisms with ability to produce cold-active biomolecules of biotechnological interest.
authors.affiliation: PROIMI - CONICET, Chacabuco, Tucumán, Argentina.
authors.forename: L A
authors.initials: LA
authors.lastname: Sánchez
authors.forename: M
authors.initials: M
authors.lastname: Hedström
authors.forename: M A
authors.initials: MA
authors.lastname: Delgado
authors.forename: O D
authors.initials: OD
authors.lastname: Delgado
mesh_terms: D000900:Anti-Bacterial Agents / Q000302:isolation & purification / Q000378:metabolism* / Q000494:pharmacology*; D001419:Bacteria / Q000166:cytology / Q000187:drug effects / Q000254:growth & development; D001430:Bacteriocins / Q000096:biosynthesis* / Q000302:isolation & purification / Q000494:pharmacology*; D003080:Cold Temperature; D008970:Molecular Weight; D012705:Serratia / Q000254:growth & development / Q000378:metabolism*; D013696:Temperature
chemical_list: D000900:Anti-Bacterial Agents; D001430:Bacteriocins