title: Intergeneric coaggregations among Oligotropha carboxidovorans and Acinetobacter species present in activated sludge.
abstract: The coaggregation traits of two pairs of sewage sludge bacteria were tested and characterized. Oligotropha carboxidovorans S23 coaggregated with two strains of the genus Acinetobacter viz. Acinetobacter junii S33 (56%) and Acinetobacter johnsonii S35 (99%). Coaggregates of O. carboxidovorans S23 and A. junii S33 were small (20-40 microm), weak and susceptible to EDTA and a commercial protease (Actinase E). Actinase/periodate pretreatment of the partners prior to coaggregation revealed that interaction in this case was mediated by protein surface components. Coaggregates of O. carboxidovorans S23 and A. johnsonii S35 were large (above 100 microm), strong and not deflocculated by EDTA or Actinase E. Only periodate pretreatment of A. johnsonii S35 prevented this coaggregation indicating a role for a carbohydrate-containing moiety without the involvement of protein components. The potential mechanisms and strength of bacterial coaggregations seem to be pair dependent.
authors.affiliation: Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan. anumalik@cc.utsunomiya-u.ac.jp
authors.forename: Anushree
authors.initials: A
authors.lastname: Malik
authors.forename: Kazuo
authors.initials: K
authors.lastname: Kakii
mesh_terms: D000150:Acinetobacter / Q000166:cytology* / Q000254:growth & development*; D001422:Bacterial Adhesion / Q000187:drug effects; D002241:Carbohydrates / Q000494:pharmacology; D002614:Chelating Agents / Q000494:pharmacology; D004492:Edetic Acid / Q000494:pharmacology; D004573:Electrolytes / Q000494:pharmacology; D008934:Mitogens / Q000494:pharmacology; D010504:Periodic Acid / Q000494:pharmacology; D011492:Protein Hydrolysates / Q000494:pharmacology; D012722:Sewage / Q000382:microbiology*
chemical_list: D002241:Carbohydrates; D002614:Chelating Agents; D004573:Electrolytes; D008934:Mitogens; D011492:Protein Hydrolysates; D012722:Sewage; D010504:Periodic Acid; D004492:Edetic Acid; C009288:metaperiodate