No abstract

Tungsten complex [W(NHC)(CO)5] (1) (NHC=NH,N‐ethyl‐substituted benzimidazolin‐2‐ylidene ligand) was prepared by transmetallation of lithiated 1‐ethylbenzimidazole with the pentacarbonyltungsten complex fragment. The hydrogen‐bonding ability of the carbene‐NH group to substrates with carbonyl groups was investigated by NMR titration. Structural analogues to 1 with a catalytically active rhodium center show a distinct substrate‐selective hydrogenation behaviour.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

A bacterial isolate obtained from soil from a municipal landfill site in India was characterized using a polyphasic taxonomic approach. The colonies of the isolate were found to be yellow and highly mucoid. Comparative analysis of the 16S rRNA gene sequence showed that this isolate constitutes a distinct phyletic line within the genus Lysobacter, displaying >3 % sequence divergence with respect to recognized Lysobacter species. The generic assignment was confirmed by chemotaxonomic data, which revealed the presence of a fatty acid profile characteristic of members of the genus Lysobacter and consisting of saturated, unsaturated, straight-chain and branched-chain fatty acids as well as iso-C 11 : 0 3-OH as hydroxylated fatty acid, and the presence of an ubiquinone with eight isoprene units (Q-8) as the predominant respiratory quinone. The genotypic and phenotypic data show that strain IMMIB APB-9T merits classification as representing a novel species of the genus Lysobacter, for which the name Lysobacter defluvii sp. nov. is proposed. The type strain is IMMIB APB-9 T (=CCUG 53152 T =DSM 18482 T ).

No abstract

The remarkable host specificity of the species of the genus Actinobaculum led us to recharacterize these species by a polyphasic approach. A comparative chemotaxonomic study including analysis of whole-cell sugars, amino acid composition of the peptidoglycan, fatty acid methyl esters, respiratory quinones and polar lipids revealed significant differences that, in combination with molecular data, support a dissection of the genus Actinobaculum. The proposals of this study include the reclassification of Actinobaculum schaalii and Actinobaculum urinale as Actinotignum schaalii gen. nov., comb. nov. (type strain DSM 15541 T 5CCUG 27420 T) and Actinotignum urinale comb. nov. (type strain DSM 15805 T 5CCUG 46093 T), respectively. Emended descriptions of the genus Actinobaculum and Actinomyces suis are also provided. The results of 16S rRNA gene sequence analysis and DNA-DNA hybridization also indicated that the type strain of Actinobaculum massiliense deposited as CCUG 47753 T (5DSM 19118 T) should in fact be considered a member of the species Actinobaculum schaalii. In addition, comparative 16S rRNA gene sequencing and DNA-DNA relatedness studies of four strains recovered from clinical materials demonstrated that three of the isolates belonged to Actinotignum schaalii; the remaining strain represents a novel species, for which the name Actinotignum sanguinis sp. nov. is proposed. The type strain is IMMIB L-2199 T (5DSM 26039 T 5CCUG 64068 T). Abbreviation: DDH, DNA-DNA hybridization. The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain IMMIB L-2199 T is HG798952. Two supplementary tables and two supplementary figures are available with the online Supplementary Material.