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Lentzea Kentuckyensis Sp. Nov., of Equine Origin

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Lentzea Kentuckyensis Sp. Nov., of Equine Origin 9583 International Journal of Systematic and Evolutionary Microbiology (2007), 57, 1780-1783 DOl 10.1 099/ijs.0.64245-0 Lentzea kentuckyensis sp. nov., of equine origin D. P. Labeda, 1 J. M. Donahue,2 S. F. Sells2 and R. M. Kroppenstedt3 Correspondence Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization D. P. Labeda Research, USDA - Agricultural Research Service, Peoria, IL 61604, USA [email protected] 2Livestock Disease Diagnostic Center, Department of Veterinary Science, University of Kentucky, Lexington, KY 40511, USA I 3DSMZ - German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany A novel actinomycete, designated strain LDDC 287605T was isolated from an equine placenta during the course of routine diagnostic tests for nocardioform placentitis. In a preliminary study, the strain was observed to be phylogenetically distinct from the genera Crossiella and Amycolatopsis and probably a member of the genus Lentzea. A polyphasic study of strain LDDC 287605T confirmed its identification as a member of Lentzea on the basis of its chemotaxonomic and morphological similarity to all of the known species of the genus. Moreover, the strain could be distinguished from other species with validly published names on the basis of its phylogenetic and physiological characteristics and its fatty acid profile. Therefore strain LDDC 287605T represents a novel species of the genus Lentzea, for which the name Lentzea ken fuckyensis sp. nov. is proposed. The type strain is LDDC 287605T (=NRRL B24416T =DSM 44909T) Nocardioform placentitis is a distinctive type of placentitis UltraClean microbial DNA isolation kits (Mc, Bio I.abora- in horses, in which lesions observed on the chorionic tories), amplified, sequenced according to previously surface of the placenta are associated with Gram-positive, described procedures (Labeda & Kroppenstedt, 2000) and branching micro-organisms that can be recovered upon then deposited in GenBank. This sequence was aligned, culture (Donahue & Williams, 2000; Giles et al., 1993; within ARO (Ludwig et al., 2004), against those for taxa in Hong et al., 1993). The actinomycetes isolated from these the suborder Pseudonocardineae. The program PHYIo_WIN lesions are predominantly identified as either Crossiella (Galtier et al., 1996) was used to calculate evolutionary equi (Donahue et al., 2002) or various Amycolatopsis distances according to the method of Kimura (1980) and species (Labeda ci al., 2003), but representatives of other linkages according to the neighbour-joining method of actinomycete genera have also been isolated. During the Saitou & Nei (1987) and to perform maximum-parsimony course of evaluating isolates from diagnostic studies of and maximum-likelihood analyses. The topographies of the equine placentas during the 2005 breeding season, an trees resulting from the neighbour-joining and maximum- .actinomcete placental isolate, designated strain LDDC parsimony analyses were evaluated by bootstrap analysis of 2876-05 , was obtained that did not belong to the genera the data on the basis of 500 resamplings (Felsenstein, Crossiella or Amycolatopsis according to preliminary mole- 1989). cular systematic identification. No gross or histopatholo- gical lesions were seen in the placenta, and it was believed Genomic DNA for DNA relatedness determinations was that the isolate was a contaminant picked up from the isolated from biomass of Lentzea albidocapillata NRRL B-240571 , Lentzea waywayandensis NRRL B-16159 1 and mares environment during the birthing process. The mare 287605T IN produced a live, healthy foal. A polyphasic study of this strain LI)l)C grown for 5 days with shaking at strain was undertaken to clarify its taxonomic identity. 28 C on I)SMZ medium no. 554 broth, using Power- Microbial Maxi DNA isolation kits (Mo Bic, Laboratories). The strain was cultivated on NZarnine medium (DSMZ The purified DNA was then sheared to 300-500 bp by medium no. 554; DSMZ, 2001) at 28 °C. Morphological passage twice through a French pressure cell (Thermo of observations were made on the media Shirling & Fisher Scientific) and levels of DNA relatedness were Gottlieb (1966) and DSMZ medium no. 554. determined in 5x SSC (Ix SSC is 0.15 M sodium Genomic DNA for sequencing was isolated from cells chloride and 0.015 M sodium citrate) supplemented with grown on plates containing DSMZ medium no. 554, using 20% DMSO as described by Dc Ley ci al. (1970). The GenBank/EMBL/DDBJ accession number for the 16S rRNA For analyses of the fatty acids, approximately 40 mg cells gene sequence of strain NRRL B-244161 (=LDDC 2876.051) is was scraped from agar plates, whereas for the other D0291145. chemical analyses the cells were grown in liquid medium 1780 64245 Printed in Great Britain Lenizea ken fuckyensis sp. nov. and harvested by centrifugation. Chemotaxonomic analysis the genus Lentzea. The strain grew well on all of the media of the strains for polar lipids, menaquinones and fatty evaluated and was observed to produce substrate inycelium acids were performed using previously described methods that was yellow to deep yellow in colour; no soluble (Grund & Kroppenstedt, 1989; Minnikin et al., 1984; pigments were produced on any of the test media, except Sasser, 1990). peptone-iron agar. White to yellowish-white aerial myce- Physiological tests, including assessment of the production lium was produced on all of the growth media tested. of acid from carbohydrates, the utilization of organic acids The cell wall of strain LDDC 287605T was observed to and the hydrolysis and decomposition of adenine, guanine, contain meso-diaminopimelic acid, and the whole-cell hypoxanthine, tyrosine, xanthine, casein, aesculin, urea and sugars consisted of galactose and ribose. The polar lipids hippurate, were evaluated by using the media of Gordon present were phosphatidylethanolamine, hydroxyphospha- et al. (1974). Phosphatase activity was evaluated by using tidylethanolamine, diphosphatidylglycerol, phosphatidyl- the method of Kurup & Schmitt (1973). The temperature inositol, traces of phosphatidylinositol mannosides and range for growth was determined on slants of 1)SMZ phosphatidylglycerol. Additionally, two unknown glyco- medium no. 554. lipids were observed. The only menaquinone present was Phylogenetic analyses clearly demonstrated that strain MK-9(H4 ). As expected, mycolic acids could not be detected. This chemotaxonomic profile is consistent with LDDC 2876-05 r represents a species of the genus Lentzea, 287605T closely related to Lentzea albida and L. waywayandensis assignment of strain LDDC to the genus Lenizea. (Fig. 1). Tree topographies for the other algorithms The fatty acid pattern mainly comprises iso/anteiso- evaluated were very similar. The levels of 16S rRNA gene branched fatty acids and small, but diagnostic, amounts of 2-hydroxy fatty acids. The detailed fatty acid profile for sequence similarity with respect to the type strains of L. 287605T albida, L. albidocapillata, Len tzea californiensis, Len izea LDDC shown in Table I, can he used to dis- flaviverrucosa, Len tzea violacea and L. waywayandensis, as tinguish the strain from described species of this genus. determined using the GAP algorithm in GCG 11 (Accelrys), The physiological characteristics of strain LDDC 287605T were 98.9, 97.0, 96.8, 96.9, 97.4 and 98.4%, respectively. are summarized in the formal species description below The levels of DNA relatedness between the phylogenetically and the physiological characteristics that serve to distin- nearest and most distant Lentzea type strains, L. albidoca- guish between the species of the genus Lenizea are shown in pillata NRRL B-24057 1 and L. waywayandensis NRRL Table 2. B- 16159T, were determined as 61 and 49%, respectively. The chemotaxonomic, morphological and phylogenetic Further relatedness determinations were not considered data clearly support the assignment of LDDC 2876-05 1 necessary, because both of these values were below 70% 876-05 to the genus Lentzea, and the physiological and phylogenetic and therefore support the proposal that strain L1)DC data demonstrate that the strain can be differentiated from 287605T represents a novel species of the genus Lentzea. described species of the genus Lenizea. Therefore, strain The morphological characteristics of strain LDDC 2876- LDDC 287605T represents a novel species of the genus 05T namely the production of aerial mycelium that frag- Lenizea, for which the name Lentzea kentuckyensis sp. nov. ments into rod-shaped elements, are also typical of those of is proposed. - Lenizea albidocapillata IMMIB D.9581 / X84321 Lenizea violacea LM 0361 / AJ242633 Lentzea flaviverrucosaAS 40578T /AF183957 Lentzea callfomiensis NRRL B.16137 T / AF174435 Lenfzea a/bida lEO 161021 /AB006176 001 - Len(zea waywoyandensis NRRL B16159T /AF114813 enfzea kentuckyensis NRRL B .244161 / DQ291145 Fig. 1. Phylogenetic tree for strain NRRL B- —Actinosynnema rn/rum IFO 14064 / D85475 24416T (=LDDC 287605T) members of the Lecheva/,eria aerocolonigenes NRRL B-32981 / AF1 14804 84 genus Lentzea and representative neighbour- -Lechevaliena uiava NRRL B-16131 1 / AF1 14808 ing taxa, calculated from 16S rRNA gene Saccharo(hrix australiensis NRRL 112391 /AF1 14803 sequences using Kimuras evolutionary dis- tance method (Kimura, 1980) and the neigh- Actinokineospora i/paris NRRL B-164321 /AF114802 bour-joining method of Saitou & Nei (1987). Amycolatopsis orient a/is IFO 12806 1 / D869351 Bar, 0.01 nucleotide substitutions per site. http://iis.sgmjournaIs.org
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