International journal of systematic and evolutionary microbiology最新文献

{"title":"<i>Roseovarius halophilus</i> sp. nov., <i>Roseovarius salis</i> sp. nov. and <i>Roseovarius salincola</i> sp. nov., three novel species of the genus <i>Roseovarius</i> from different saline lakes.","authors":"Dildar Wu, Hao-Ran Guo, Lei Gao, Qing-Yu Xu, Tayyiba Habib, Rashidin Abdugheni, Bao-Zhu Fang, Yong-Hong Liu, Wen-Sheng Shu, Xin Li, Wen-Jun Li","doi":"10.1099/ijsem.0.006882","DOIUrl":"10.1099/ijsem.0.006882","url":null,"abstract":"<p><p>Three Gram-stain-negative, non-motile and halotolerant bacterial strains, designated as SYSU LYC5161^T, SYSU LYC5162^T and EGI FJ00037^T, were isolated from sediment samples of different saline lakes in China. The taxonomic positions of these isolates were determined using the polyphasic taxonomic analysis. Phylogenetic analyses based on 16S rRNA gene sequences and genome comparisons revealed that these strains formed distinct clades within related type species as <i>Roseovarius salinarum</i> N53^T, <i>Roseovarius amoyensis</i> GCL8^T and <i>Roseovarius halotolerans</i> DSM 29507^T from the genus <i>Roseovarius</i>. Based on the genome sequencing data, the G+C contents of strains SYSU LYC5161^T, SYSU LYC5162^T and EGI FJ00037^T were 65.8 mol%, 66.1 mol% and 63.3mol%, respectively. The average nucleotide identity, average amino acid identity and digital DNA-DNA hybridization values of all three strains against related type species in the genus <i>Roseovarius</i> were below the cut-off values proposed for the delineation of a novel species. The novel isolates were distinguished from other <i>Roseovarius</i> species by their distinct phenotypic, physiological and genotypic characteristics. The major respiratory quinone of these strains was Q-10. The major polar lipids included diphosphatidylglycerol and phosphatidylglycerol. These results indicate that these strains represent three novel species within the genu<i>s Roseovarius</i>, for which the names <i>Roseovarius halophilus</i> sp. nov., <i>Roseovarius salis</i> sp. nov. and <i>Roseovarius salincola</i> sp. nov. are proposed. The type strains of the proposed novel species are SYSU LYC5161^T (=KCTC 8554^T=MCCC 1K09438^T), SYSU LYC5162^T (=KCTC 8555^T=MCCC 1K09397^T) and EGI FJ00037^T (=KCTC 92252^T=CGMCC 1.19400^T).</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144799069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Knoellia altitudinis</i> sp. nov., <i>Knoellia pratensis</i> sp. nov., <i>Knoellia terrae</i> sp. nov. and <i>Knoellia tibetensis</i> sp. nov., four novel UV radiation-resistant actinobacteria isolated from Tibet Autonomous Region, China.","authors":"Jing Zhang, Tong Mou, Cong-Jian Li, Jing-Lin Bai, Li-Yan Yu, Hua-Hong Chen, Yu-Qin Zhang","doi":"10.1099/ijsem.0.006855","DOIUrl":"10.1099/ijsem.0.006855","url":null,"abstract":"<p><p>Four Gram-stain-positive, aerobic, non-motile and non-spore-forming actinobacterial strains (CPCC 206391^T, CPCC 206453^T, CPCC 206435^T and CPCC 206450^T) were isolated from soil samples collected from Tibet Autonomous Region, China. The 16S rRNA gene sequences of these four strains showed close relations to members of the genus <i>Knoellia</i> of the family <i>Intrasporangiaceae</i>, with similarities of 96.1-99.4% to the validly named species of <i>Knoellia</i>. In the phylogenetic trees based on 16S rRNA gene sequences and the core genome, these isolates clustered into the genus <i>Knoellia</i> clade within the lineage of the family <i>Intrasporangiaceae</i>. Genome relatedness index values between these strains and their phylogenetic neighbours, including average nucleotide identity (78.1-91.5%) and digital DNA-DNA hybridization (19.8-41.0%), were all below the species delineation thresholds. These genomic data, combined with their phenotypic characteristics, supported their classification within the genus <i>Knoellia</i>, representing four novel species. Thereby, <i>Knoellia altitudinis</i> sp. nov. (type strain CPCC 206391^T=XZ253^T=KCTC 59139^T), <i>Knoellia pratensis</i> sp. nov. (type strain CPCC 206453^T=CXZ644^T=KCTC 59274^T), <i>Knoellia terrae</i> sp. nov. (type strain CPCC 206435^T=CXZ904^T=KCTC 59271^T) and <i>Knoellia tibetensis</i> sp. nov. (type strain CPCC 206450^T=XZ100^T=KCTC 59273^T) were proposed. These strains exhibited stable growth under high-intensity UV radiation, attributed to the presence of <i>uvrABC</i> and <i>recAFNOQR</i> genes involved in UV resistance and DNA repair. These features indicate the <i>Knoellia</i> spp<i>.</i> adaptation to high UV radiation environments.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12451619/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144799068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Metschnikowia maris</i> comb. nov., a large-spored yeast species endemic to Serra do Mar Atlantic Rainforest biome, Sao Paulo State, Brazil.","authors":"Ana Raquel de Oliveira Santos, Giovana Reis de Ávila, Olavo Henrique Petrucci Della Torre, Sérgio Luiz Pompéia, Maria da Graça Stupiello Andrietta, Carlos A Rosa, Marc-André Lachance","doi":"10.1099/ijsem.0.006891","DOIUrl":"10.1099/ijsem.0.006891","url":null,"abstract":"<p><p>Two yeast isolates from passion flowers were sampled in the southern part of the Serra do Mar Atlantic Rainforest in Sao Paulo State, Brazil. Barcode sequencing and mating experiments showed them to be representatives of <i>Metschnikowia matae</i> var. <i>maris</i>, thus originally named due to the availability of only a single isolate and uncertainties regarding reproductive isolation. The two new isolates being of the complementary mating type to the previously known strain, intravarietal crosses were performed. They yielded a preponderance of two-spored asci, unlike crosses with <i>M. matae</i> var. <i>matae</i>, which led to largely sterile asci. We therefore elevate the variety <i>maris</i> to the rank of species, with the name <i>Metschnikowia maris</i> comb. nov. The holotype is UFMG-CM-Y397^T (<i>MAT</i>α). Strain UFMG-CM-Y7613^A (<i>MAT</i> <b>a</b>) is designated as allotype. The new combination is registered as MB 859665.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12451631/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144954082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Proposal of <i>Lysobacter claricitrinus</i> sp. nov., isolated from soil in Japan, and emended description of <i>Lysobacter xanthus</i> Kim <i>et al</i>. 2019.","authors":"Ryota Mori, Tomoyo Takagi, Moriyuki Hamada, Ryo Kutsuna, Junko Tomida, Yoshiaki Kawamura","doi":"10.1099/ijsem.0.006897","DOIUrl":"https://doi.org/10.1099/ijsem.0.006897","url":null,"abstract":"<p><p>A bacterial strain designated as PAGU 2638^T was isolated from a soil sample collected in Owariasahi, Aichi Prefecture, Japan. It was yellow-pigmented, Gram-negative, motile by gliding and aerobic with a rod-shaped morphology. Phylogenetic analysis based on 16S rRNA gene sequences revealed that the strain belongs to the genus <i>Lysobacter</i> within the family <i>Lysobacteraceae</i>, showing high gene sequence similarity to <i>Lysobacter xanthus</i> U8^T (98.1%), <i>Lysobacter terrigena</i> 17J7-1^T (97.8%) and <i>Lysobacter humi</i> FJY8^T (97.7%). The DNA G+C content was 67.8 mol%. The average nt identity (average nt identity values based on blast/average nt identity of orthologous genes based on USEARCH) values between strain PAGU 2638^T and <i>L. xanthus</i> were 81.2% and 81.9%, respectively, while the digital DNA-DNA hybridization value was 24.4%. The major cellular fatty acids were C_16 : 0 iso, summed feature 9 (C_17 : 1 iso <i>ω</i>9<i>c</i>/C_16 : 0 10-methyl) and C_15 : 0 iso, and the predominant isoprenoid quinone was ubiquinone-8. The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol. Based on phylogenetic, genotypic, phenotypic, biochemical and chemotaxonomic analyses, strain PAGU 2638^T is considered to represent a novel species of the genus <i>Lysobacter</i>, for which the name <i>Lysobacter claricitrinus</i> sp. nov. is proposed. The type strain is PAGU 2638^T (=NBRC 116966^T=CCUG 78027^T). Furthermore, we propose revisions to biochemical characteristics of the closely related species <i>L. xanthus</i>.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144954176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Microbacterium phosphatis</i> sp. nov., an actinomycete isolated from a phosphate mine.","authors":"Huan Ma, Jing Zhen, Fei Feng, Shujing Quan, Hong Hu, Gao Lei, Wentao Diao, Dehai Liu, Shanshan Li, Lei Li, Xueyan Wang, Fuhong Xie","doi":"10.1099/ijsem.0.006849","DOIUrl":"https://doi.org/10.1099/ijsem.0.006849","url":null,"abstract":"<p><p>Two Gram-staining-positive, non-motile and non-spore-forming bacterial strains, designated as 9H2^T and YDN13, were isolated from a phosphate mine in Yunnan Province, China. Phylogenetic analyses based on 16S rRNA gene sequences indicated that strains 9H2^T and YDN13 belong to the genus <i>Microbacterium</i>. Results show that strains 9H2^T and YDN13 occupied a distinct position within the genus <i>Microbacterium</i> and showed the highest 16S rRNA gene sequence similarity of 97.6% with the type strains of <i>Microbacterium thalassium</i> CCTCC AB 2020140^T, followed by 97.5% with <i>Microbacterium hydrocarboxydans</i> DSM 16089^T and 97.3% with <i>Microbacterium stercoris</i> CCTCC AA 2018028^T. In the phylogenetic trees based on 16S rRNA gene sequences, strains 9H2^T and YDN13 were closely related to <i>M. stercoris</i> CCTCC AA 2018028^T and <i>Microbacterium sediminicola</i> YM 10-847^T. Strains 9H2^T and YDN13 showed the highest values of an orthologous average nucleotide identity (84%) and a digital DNA-DNA hybridization (49%) with <i>M. stercoris</i> CCTCC AA 2018028^T, followed by an orthologous average nucleotide identity of 76.0% and a digital DNA-DNA hybridization value of 17.9% with <i>M. thalassium</i> CCTCC AB 2020140^T. The respiratory menaquinones were MK-11, MK-12, MK-10 and MK-13. The major fatty acid profile contained anteiso-C_15 : 0, iso-C_16 : 0 and anteiso-C_17 : 0. The polar lipids contained diphosphatidylglycerol, phosphatidylglycerol, three unidentified phospholipids and one unidentified glycolipid. The whole-cell sugars included galactose and glucose. The peptidoglycan hydrolysate contained glutamate, glycine, ornithine and alanine. The DNA G+C contents were 71.1 mol%. Phenotypic, phylogenetic, chemotaxonomic and genomic analyses revealed that strains 9H2^T and YDN13 represent a novel species of <i>Microbacterium</i>, for which the name <i>Microbacterium phosphatis</i> sp. nov. was proposed. The type strain is 9H2^T (MCCC 1K08680^T=KCTC 59053^T=CGMCC 1.60061^T).</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144794398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Piscibacter tructae</i> gen. nov., sp. nov., an anaerobic butyrate-producing <i>Fusobacteriaceae</i> bacterium isolated from gut of rainbow trout.","authors":"Mio Takeuchi, Kazuhiro Sugahara","doi":"10.1099/ijsem.0.006877","DOIUrl":"https://doi.org/10.1099/ijsem.0.006877","url":null,"abstract":"<p><p>A Gram-stain-negative, anaerobic and rod-shaped bacterium was isolated from gut of rainbow trout in Japan. The temperature range for the growth of 9N8^T was 10<i>-</i>30 °C with an optimum at 20 °C. The organism produced acetate and butyrate when grown on AccuDia^™ Gifu Anaerobic Medium broth, Modified. Phylogenetic analysis of 16S rRNA gene sequences indicated that strain 9N8^T was related to the genus <i>Fusobacterium</i> (<92.9% similarity) and formed a distinct phylogenetic lineage from existing genera within the family <i>Fusobacteriaceae</i>. Strain 9N8^T has a genome size of 2.60 Mb. The genomic DNA G+C content was 29.4 mol%. Average amino acid identity values between strain 9N8^T and strains in the family <i>Fusobacteriaceae</i> ranged from 39.2 to 57.5%. The major fatty acids of strain 9N8^T were C_14 : 0, C_16 : 1 ω7c and C_16 : 0. On the basis of the morphological, physiological, biochemical and genetic information, a novel genus and species, <i>Piscibacter tructae,</i> is proposed, with 9N8^T (=NBRC 116745^T=DSM 118263^T) as the type strain.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144789123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Variovorax atrisoli</i> sp. nov., a novel species isolated from black soil applied with herbicide atrazine in Northeast China.","authors":"Jianheng Wang, Yuzhu Chen, Yuxi Yang, Yuxin Fan, Charity Offei, Jing Bai, Yanjie Qi, Yucheng Wu, Dongfei Han","doi":"10.1099/ijsem.0.006886","DOIUrl":"https://doi.org/10.1099/ijsem.0.006886","url":null,"abstract":"<p><p>The strain tm^T was isolated from black soil applied with the herbicide atrazine in Northeast China. Phylogenetic analyses based on 16S rRNA gene sequences and phylogenomic analysis revealed that the strain tm^T is classified to the genus <i>Variovorax</i>. The DNA G+C content of strain tm^T was 67.5 mol%. The major fatty acids were C_16 : 0, C_10 : 0 3-OH, C_17 : 0 cyclo, summed feature 3 (C16 : 1 <i>ω</i>7<i>c</i> and/or C16 : 1 <i>ω</i>6<i>c</i>) and summed feature 8 (C18 : 1 <i>ω</i>7<i>c</i> and/or C18 : 1 <i>ω</i>6<i>c</i>) in strain tm^T. Strain tm^T contained Q-8 as the major respiratory quinone. Polar lipids in strain tm^T were mainly comprised of diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. Initial selection of phylogenetically related taxa was performed through whole-genome phylogenomic analysis encompassing strain tm^T and all validly published members of the genus <i>Variovorax</i>. The calculation of the average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between strain tm^T and phylogenetically proximal strains demonstrated that the values of ANI and dDDH with <i>Variovorax</i> sp. 1140, <i>Variovorax</i> sp. 1133, <i>Variovorax</i> sp. 369, <i>Variovorax</i> sp. 1128, <i>Variovorax</i> sp. 1126, <i>Variovorax paradoxus</i> SMAGNO29, <i>V. paradoxus</i> 110B, <i>Variovorax</i> sp. BK613 and <i>V. paradoxus</i> DS996 were well over thresholds (95-96%, 70%), of which strains SMAGNO29, 110B and DS996 were classified as <i>V. paradoxus</i> in previous publications. However, the ANI and dDDH values between these strains and the type strain <i>V. paradoxus</i> were significantly lower than the established taxonomic thresholds for species delineation. Thus, we deduced that these nine strains belong to a novel species with strain tm^T, <i>Variovorax atrisoli</i> sp. nov. We further performed phenotypic and chemotaxonomic tests which revealed that there were high levels of intraspecies variation. Based on these results, strain tm^T (=GDMCC 1.4848^T=KCTC 8741^T) was designated as the type strain of the novel species for which we propose the name <i>V. atrisoli</i> sp. nov.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144816602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Marinivivus vitaminiproducens</i> gen. nov., sp. nov., a vitamin B₁₂-producing bacterium isolated from the coral <i>Fungia</i> sp. in South China Sea.","authors":"Song-Biao Shi, Li-Li Jian, Qi Zeng, Yi Jiang, Li-Juan Long, Xin-Peng Tian","doi":"10.1099/ijsem.0.006878","DOIUrl":"10.1099/ijsem.0.006878","url":null,"abstract":"<p><p>A Gram-stain-negative, aerobic, non-motile and short rod-shaped bacterium, designated strain SCSIO 64248^T, was isolated from the stony coral <i>Fungia</i> sp. collected from South China Sea. Phylogenetic analysis indicated that strain SCSIO 64248^T belonged to the family <i>Geminicoccaceae</i> and showed the highest 16S rRNA gene similarities with the types of <i>Marinimicrococcus flavescens</i> (90.5%), <i>Arboricoccus pini</i> (90.2%) and <i>Benzoalithermus flavus</i> (89.8%). The whole genome of strain SCSIO 64248^T was 4.9 Mbp with a 68.8mol% G+C content. It shared average amino acid identity (AAI) values of 52-56.2%, which is below the proposed AAI threshold at the genus level and when compared to the known species of <i>Geminicoccaceae</i>. Colonies of strain SCSIO 64248^T are circular, pink and convex. It was able to grow in the range of 4-37 °C, at pH 6.0-10.0 and in the presence of up to 8.0% (w/v) NaCl concentration. The major cellular fatty acid (>9%) was summed feature 8, C_19 : 0 cyclo <i>ω</i>8<i>c</i> and C_16 : 0, and the sole respiratory quinone was Q-10. The polar lipids were phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine and an unidentified phospholipid. Data of polyphasic characteristics revealed that strain SCSIO 64248^T represented a novel species of a new genus within the family <i>Geminicoccaceae</i>, for which the name <i>Marinivivus</i> gen. nov. is proposed with the type strain of the type species <i>Marinivivus vitaminiproducens</i> SCSIO 64248^T (=MCCC 1K08013^T=KCTC 92503^T).</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144873149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"International Committee on Systematics of Prokaryotes subcommittee on the taxonomy of <i>Borrelia</i>: minutes of the second meeting. Online meeting, 9 January 2025.","authors":"Brian Stevenson, Gabriele Margos","doi":"10.1099/ijsem.0.006873","DOIUrl":"https://doi.org/10.1099/ijsem.0.006873","url":null,"abstract":"<p><p>International Committee on Systematics of Prokaryotes subcommittee on the taxonomy of Borrelia: minutes of the second meeting. Online meeting, 9 January 2025.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144835067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Streptomyces malaysiensis</i> subsp. <i>samsunensis</i> comb. nov. and reclassification of <i>Streptomyces solisilvae</i> Zhou <i>et al</i>. 2017 as a heterotypic synonym of <i>Streptomyces malaysiensis</i> Al-Tai <i>et al</i>. 1999.","authors":"Hisayuki Komaki","doi":"10.1099/ijsem.0.006852","DOIUrl":"https://doi.org/10.1099/ijsem.0.006852","url":null,"abstract":"<p><p>Taxonomic relationships were investigated among <i>Streptomyces malaysiensis</i> Al-Tai <i>et al</i>. 1999, <i>Streptomyces samsunensis</i> Sazak <i>et al.</i> 2011 and <i>Streptomyces solisilvae</i> Zhou <i>et al.</i> 2017. Phylogenetic analyses suggested that these three species are closely related. Digital DNA-DNA hybridization value and average nucleotide identity based on blast+ between <i>S. malaysiensis</i> JCM 10672^T and <i>S. solisilvae</i> HNM0141^T were 99.8 and 99.9%, whereas those between <i>S. samsunensis</i> DSM 42010^T and the remaining two were 75.4-75.6 and 95.0-96.5%, respectively. Their major phenotypic characteristics resembled each other except for the utilizations of <i>myo</i>-inositol and d-xylose by <i>S. samsunensis</i>. All the type-I polyketide synthase (PKS) and non-ribosomal peptide synthetase (NRPS) gene clusters were conserved between type strains of <i>S. malaysiensis</i> and <i>S. solisilvae</i>, but the type strain of <i>S. samsunensis</i> harboured 4 specific PKS and NRPS gene clusters instead of 11 clusters present in type strains of <i>S. malaysiensis</i> and <i>S. solisilvae</i>. Therefore, <i>S. solisilvae</i> and S. <i>samsunensis</i> were reclassified as a later heterotypic synonym of <i>S. malaysiensis</i> and S. <i>malaysiensis</i> subsp. <i>samsunensis</i> comb. nov., respectively. Based on the reclassifications, scientific names of whole genome sequence-published non-type strains related to the species were reviewed and updated.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144794399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}