title: Degradation of proteins during the fermentation of African locust bean (Parkia biglobosa) by strains of Bacillus subtilis and Bacillus pumilus for production of Soumbala.
abstract: OBJECTIVE
  To examine isolates of Bacillus subtilis and B. pumilus predominant in Soumbala for their ability to degrade African locust bean proteins (ALBP).
  
  
  RESULTS
  Agar diffusion test in casein and ALBP agar was used for screening of isolates. The profiles of water-soluble proteins and free amino acids (FAA) during the fermentation of ALBP by the Bacillus isolates were studied by SDS-PAGE and cation exchange chromatography. The profile of soluble proteins changed with the fermentation time and varied depending on the isolate. The quantity of total FAA and essential FAA such as lysine was increased sharply between 24 and 48 h of fermentation and differed among the isolates. Simultaneously, a pH increase was observed. Cysteine, methionine, leucine, isoleucine, tyrosine and phenylalaline appeared during fermentation.
  
  
  CONCLUSIONS
  The Bacillus isolates studied degraded ALBP leading to a profile of soluble proteins and FAA specific for each isolate.
  
  
  CONCLUSIONS
  This study contributes to the selection of Bacillus strains to be used as starter cultures for controlled production of Soumbala.
authors.affiliation: Département de Technologie Alimentaire, Centre National de la Recherche Scientifique et Technologique, Ouagadougou, Burkina Faso.
authors.forename: L I I
authors.initials: LI
authors.lastname: Ouoba
authors.forename: K B
authors.initials: KB
authors.lastname: Rechinger
authors.forename: V
authors.initials: V
authors.lastname: Barkholt
authors.forename: B
authors.initials: B
authors.lastname: Diawara
authors.forename: A S
authors.initials: AS
authors.lastname: Traore
authors.forename: M
authors.initials: M
authors.lastname: Jakobsen
mesh_terms: D000596:Amino Acids / Q000032:analysis; D001407:Bacillus / Q000378:metabolism*; D001412:Bacillus subtilis / Q000378:metabolism; D002845:Chromatography / Q000379:methods; D003212:Condiments; D004591:Electrophoresis, Polyacrylamide Gel / Q000379:methods; D007887:Fabaceae / Q000382:microbiology*; D005230:Fatty Acids, Nonesterified / Q000378:metabolism; D005285:Fermentation / Q000502:physiology; D005516:Food Microbiology; D006863:Hydrogen-Ion Concentration; D005779:Immunodiffusion / Q000379:methods; D010940:Plant Proteins / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D005230:Fatty Acids, Nonesterified; D010940:Plant Proteins