Genus Obesumbacterium
Warning: In the List of Prokaryotic names with Standing in Nomenclature, an arrow (→) only indicates the sequence of valid publication of names and does not mean that the last name in the sequence must be used (see: Introduction).
Number of species, including synonyms, cited in this file: 1
Number of subspecies, including synonyms, cited in this file: 0
Classification (Warning: see also the file "Classification of prokaryotes: Introduction").
For a detailed description of this taxon see Bergey’s Manual of Systematics of Archaea and Bacteria (BMSAB).
Obesumbacterium Shimwell 1963, genus.
Type species: ¤ Obesumbacterium proteus Shimwell 1963 (Approved Lists 1980).
Etymology: L. neut. adj. obesum, fat; L. neut. n. bacterium, a rod; N.L. neut. n. Obesumbacterium, a fat, rod-shaped bacterium.
Approved Lists reference: SKERMAN (V.B.D.), McGOWAN (V.) and SNEATH (P.H.A.) (editors): Approved Lists of Bacterial Names. Int. J. Syst. Bacteriol., 1980, 30, 225-420 (Approved Lists of Bacterial Names in IJSEM Online - Approved Lists of Bacterial Names Amended edition).
Original publication: SHIMWELL (J.L.): Obesumbacterium gen. nov. Brewers Journal, 1963, 99, 759-760.
Notes:
1 There are two DNA-DNA hybridisation groups (HG) within Obesumbacterium proteus; these are separable by biochemical characters and DNA-DNA hybridisation. The type strain (ATCC 12841 falls in Group 1. Similarly, there are two groups within ¤ Hafnia. The type strain (ATCC 13337= NCTC 8105) falls in Group 1, leaving Group 2 unnamed. However, despite having distinct phenotypic differences, Obesumbacterium proteus group 1 (type strain ATCC 12841 is 75% related to DNA group 1 of Hafnia alvei (though only 52% related to DNA group 2 of Hafnia alvei); these two organisms are thus a single species, ¤ Hafnia alvei. This leaves two separate unnamed groups (Obesumbacterium proteus HG2 and Hafnia alvei HG2) that are not closely related.
In April 2010, Priest and Barker validly publish the name ¤ Shimwellia pseudoproteus for Obesumbacterium proteus HG2 strains.
In July 2010, Huys et al. validly publish the name ¤ Hafnia paralvei for Hafnia alvei HG2 strains.
References:
1 HOLMES (B.) and FARMER III (J.J.): International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Enterobacteriaceae. Minutes of the meetings, 7 August 2008, Istanbul, Turkey. Int. J. Syst. Evol. Microbiol., 2009, 59, 2643-2645.
Original article in IJSEM Online
2 PRIEST (F.G.) and BARKER (M.): Gram-negative bacteria associated with brewery yeasts: reclassification of Obesumbacterium proteus biogroup 2 as Shimwellia pseudoproteus gen. nov., sp. nov., and transfer of Escherichia blattae to Shimwellia blattae comb. nov. Int. J. Syst. Evol. Microbiol., 2010, 60, 828-833.
Original article in IJSEM Online
3 HUYS (G.), CNOCKAERT (M.), ABBOTT (S.L.), JANDA (J.M.) and VANDAMME (P.): Hafnia paralvei sp. nov., formerly known as Hafnia alvei hybridization group 2. Int. J. Syst. Evol. Microbiol., 2010, 60, 1725-1728.
Original article in IJSEM Online
2 Comparison of the MLST sequences show only 95% similarity between Obesumbacterium proteus HG1 and Hafnia alvei HG1. Priest and Barker therefore recommend that Obesumbacterium proteus HG1 strains retain the name Obesumbacterium proteus until the systematics of the genus ¤ Hafnia have been clarified and the relationships between these bacteria and Hafnia alvei are understood more clearly.
Reference: PRIEST (F.G.) and BARKER (M.): Gram-negative bacteria associated with brewery yeasts: reclassification of Obesumbacterium proteus biogroup 2 as Shimwellia pseudoproteus gen. nov., sp. nov., and transfer of Escherichia blattae to Shimwellia blattae comb. nov. Int. J. Syst. Evol. Microbiol., 2010, 60, 828-833.
Original article in IJSEM Online
Obesumbacterium proteus (Shimwell and Grimes 1936) Shimwell 1963, species. (Type species of the genus.)
Type strain: (see also Global Catalogue of Microorganisms) ATCC 12841= CCUG 2078 = CIP 82.93 = DSM 2777 = LMG 3054 = NCIB (now NCIMB) 8771 = VKM B-964.
Sequence accession no. (16S rRNA gene) for the type strain: AJ233422.
Synonym: "Flavobacterium proteum" (sic) Shimwell and Grimes 1936.
Etymology: L. masc. n. Proteus, the ancient Greek sea-god noted for being able to change his form at will; L. masc. n. proteus, intended to mean one who is able to be pleomorphic.
Approved Lists reference: SKERMAN (V.B.D.), McGOWAN (V.) and SNEATH (P.H.A.) (editors): Approved Lists of Bacterial Names. Int. J. Syst. Bacteriol., 1980, 30, 225-420 (Approved Lists of Bacterial Names in IJSEM Online - Approved Lists of Bacterial Names Amended edition).
Original publication: SHIMWELL (J.L.): Obesumbacterium gen. nov. Brewers Journal, 1963, 99, 759-760.
Notes:
1 The citation of authors for the name Obesumbacterium proteus is different from the one that appears on the Approved Lists 1980, which omit "Shimwell and Grimes 1936". Presumably this was an inadvertent omission.
Reference: FARMER III (J.J.): Other genera of the familly Enterobacteriaceae. In: N.R. KRIEG and J.G. HOLT (editors), Bergey's Manual of Systematic Bacteriology, first edition, vol. 1, The Williams & Wilkins Co, Baltimore, 1984, pp.506-516.
2 There are two DNA-DNA hybridisation groups (HG) within Obesumbacterium proteus; these are separable by biochemical characters and DNA-DNA hybridisation. The type strain (ATCC 12841 falls in Group 1. In April 2010, Priest and Barker validly publish the name ¤ Shimwellia pseudoproteus for Obesumbacterium proteus HG2 strains.
References:
1 PRIEST (F.G.), SOMERVILLE (H.J.), COLE (J.A.) and HOUGH (J.S.): The taxonomic position of Obesumbacterium proteus, a common brewery contaminant. J. Gen. Microbiol., 1973, 75, 295-307.
Original article in Microbiology Online
2 HOLMES (B.) and FARMER III (J.J.): International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Enterobacteriaceae. Minutes of the meetings, 7 August 2008, Istanbul, Turkey. Int. J. Syst. Evol. Microbiol., 2009, 59, 2643-2645.
Original article in IJSEM Online
3 PRIEST (F.G.) and BARKER (M.): Gram-negative bacteria associated with brewery yeasts: reclassification of Obesumbacterium proteus biogroup 2 as Shimwellia pseudoproteus gen. nov., sp. nov., and transfer of Escherichia blattae to Shimwellia blattae comb. nov. Int. J. Syst. Evol. Microbiol., 2010, 60, 828-833.
Original article in IJSEM Online