Family Paenibacillaceae Research Articles

Ferviditalea candida gen. nov., sp. nov., a novel member of the family Paenibacillaceae isolated from a geothermal area

ObjectiveThe family Paenibacillaceae is linked to the order Caryophanales. Paenibacillaceae members residing in compost or soil play crucial roles in nutrient recycling and breaking down complex organic materials. However, our understanding of Paenibacillaceae remains limited. MethodsStrain SYSU GA230002T was conclusively identified using a polyphasic taxonomic approach frequently utilized in bacterial systematics. Standard microbiological techniques were employed to characterize the morphology and biochemistry of strain SYSU GA230002T. ResultsAn anaerobic and gram--negative bacterium, designated SYSU GA230002T, was isolated from geothermally heated soil of Tengchong, Yunnan Province, south-west China. Phylogenetic analyses based on 16S rRNA gene sequences and genomes showed that strain SYSU GA230002T belongs to the family Paenibacillaceae. 16S rRNA gene sequence similarity (<94.0 %), ANI (<71.95 %) and AAI values (<58.67 %) between strain SYSU GA230002T with other members of the family were lower than the threshold values recommended for distinguishing novel species. Growth was observed at 30-45 °C (optimum, 37 °C), pH 7.0–8.0 (optimum, pH 7.5) and in 0–3.0 % (w/v) NaCl concentrations (optimum, 0 %). The major fatty acids detected were anteiso-C15:0, iso-C16:0 and iso-C17:0. The polar lipids included diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, one unidentified phospholipid, one unidentified aminolipid and two unidentified glycolipids. The respiratory quinone was MK-7. The DNA G + C content of strain SYSU GA230002T was 49.87 %. ConclusionBased on the results of morphological, physiological properties, and chemotaxonomic characteristics, this strain is proposed to represent a new species of a new genus Ferviditalea candida gen. nov., sp. nov. The type strain of the type species is SYSU GA230002T (=KCTC 25726T = GDMCC 1.4160T).

Identification and characterization of a novel aminoglycoside O-nucleotidyltransferase ANT(6)-If from Paenibacillus thiaminolyticus PATH554.

Paenibacillus thiaminolyticus, a species of genus Paenibacillus of the family Paenibacillaceae, exists widely in environments and habitats in various plants and worms, and occasionally causes human infections. This work aimed to characterize the function of a novel aminoglycoside O-nucleotidyltransferase resistance gene, designated ant(6)-If, from a P. thiaminolyticus strain PATH554. Molecular cloning, antimicrobial susceptibility testing, enzyme expression and purification, and kinetic analysis were used to validate the function of the novel gene. Whole-genome sequencing and comparative genomic analysis were performed to investigate the phylogenetic relationship of ANT(6)-If and other aminoglycoside O-nucleotidyltransferases, and the synteny of ant(6)-If related sequences. The recombinant with the cloned ant(6)-If gene (pMD19-ant(6)-If/DH5α) demonstrated a 128-fold increase of minimum inhibitory concentration level against streptomycin, compared with the control strains (DH5α and pMD19/DH5α). The kinetic parameter kcat/Km of ANT(6)-If for streptomycin was 9.01 × 103 M-1·s-1. Among the function-characterized resistance genes, ANT(6)-If shared the highest amino acid sequence identity of 75.35% with AadK. The ant(6)-If gene was located within a relatively conserved genomic region in the chromosome. ant(6)-If conferred resistance to streptomycin. The study of a novel resistance gene in an unusual environmental bacterium in this work contributed to elucidating the resistance mechanisms in the microorganisms.

Comparative genomic analysis of Cohnella hashimotonis sp. nov. isolated from the International Space Station.

A single strain from the family Paenibacillaceae was isolated from the wall behind the Waste Hygiene Compartment aboard the International Space Station (ISS) in April 2018, as part of the Microbial Tracking mission series. This strain was identified as a gram-positive, rod-shaped, oxidase-positive, catalase-negative motile bacterium in the genus Cohnella, designated as F6_2S_P_1T. The 16S sequence of the F6_2S_P_1T strain places it in a clade with C. rhizosphaerae and C. ginsengisoli, which were originally isolated from plant tissue or rhizosphere environments. The closest 16S and gyrB matches to strain F6_2S_P_1T are to C. rhizosphaerae with 98.84 and 93.99% sequence similarity, while a core single-copy gene phylogeny from all publicly available Cohnella genomes places it as more closely related to C. ginsengisoli. Average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values to any described Cohnella species are <89 and <22%, respectively. The major fatty acids for strain F6_2S_P_1T are anteiso-C15:0 (51.7%), iso-C16:0 (23.1%), and iso-C15:0 (10.5%), and it is able to metabolize a wide range of carbon compounds. Given the results of the ANI and dDDH analyses, this ISS strain is a novel species within the genus Cohnella for which we propose the name Cohnella hashimotonis, with the type strain F6_2S_P_1T (=NRRL B-65657T and DSMZ 115098T). Because no closely related Cohnella genomes were available, this study generated the whole-genome sequences (WGSs) of the type strains for C. rhizosphaerae and C. ginsengisoli. Phylogenetic and pangenomic analysis reveals that F6_2S_P_1T, C. rhizosphaerae, and C. ginsengisoli, along with two uncharacterized Cohnella strains, possess a shared set of 332 gene clusters which are not shared with any other WGS of Cohnella species, and form a distinct clade branching off from C. nanjingensis. Functional traits were predicted for the genomes of strain F6_2S_P_1T and other members of this clade.

Isolation and characterization of anaerobic bacteria with fiber degradation potential from faeces of Boselaphus tragocamelus grazing on semi arid Indian conditions.

Hindgut of wild ruminants harbours diversified anaerobic bacteria with promising fiber degrading ability. Fibrolytic enzyme activity is strongly influenced by diet and host species which till date remains unexplored for harnessing their optimum benefits. The present study was conducted to isolate and characterize fiber degrading anaerobic bacteria from faeces of wild blue bull (Boselaphus tragocamelus) inhabiting in semiarid regions. A total of 167 isolates were obtained from 85 faecal samples using M-10 medium, on the basis of clear zones formed on Congo red plates 20 isolates were selected and designated as NLG1-20 for microscopic and biochemical characterization. Further, molecular confirmation was done by PCR analysis with universal 16S rDNA primers. All isolates were obligatory anaerobes except, NLG4, NLG19 and NLG20. Majority of the sugars tested were utilized by most of the isolates except arabinose. Fibrolytic enzyme activities revealed that NLG1 had highest endoglucanase activity, NLG13 had highest exoglucanase activity while NLG8 showed maximum xylanase activity. In case of FPase assay, highest and lowest values were observed in isolate NLG11 (8.96 U/mL) and NLG8 (5.58 U/mL), respectively. Phylogenetic analysis of the isolates revealed a highly diverse group of microbes mainly belonging to the family Paenibacillaceae which have not been previously characterized in ruminants for fiber degradation. Therefore, results obtained in the present study indicated that the screened isolates showed promising fiber degrading potential in terms of filter paper assay and fibrolytic enzyme activity which can be explored further for improving lignocellulose digestibility in ruminants as an additive.

Paenibacillus albiflavus sp. nov., a bacterium isolated from soil.

Strain 18JY21-1T, a Gram-positive, endospore-forming, motile, and rod-shaped bacterium, was isolated from soil in South Korea and was characterised to determine its taxonomic position. Phylogenetic analysis based on the 16S rRNA gene sequence of strain 18JY21-1T revealed that the strain 18JY21-1T belongs to the genus Paenibacillus in the family Paenibacillaceae in the class Bacilli. The highest degree of sequence similarities of strain 18JY21-1T was found with Paenibacillus doosanensis CAU 1055T (97.7%) and Paenibacillus protaetiae KACC 19327T (94.4%). In genome analysis, the calculated average nucleotide identity (ANI) and the digital DNA-DNA hybridization (DDH) values between strain 18JY21-1T and Paenibacillus protaetiae KACC 19327T were 66.3% and 22.8%, respectively. Chemotaxonomic data revealed that the predominant fatty acids were anteiso-C15:0 (38.7%) and C16:0 (18.0%). A complex polar lipid profile consisted of major amounts of diphosphatidylglycerol (DPG), phosphatidylethanolamine (PE), and phosphatidylglycerol (PG). The cell wall peptidoglycan was meso-diaminopimelic acid. The predominant respiratory quinone was MK-7. Based on the phylogenetic, chemotaxonomic, and phenotypic data, strain 18JY21-1T (= KCTC 3396T = JCM 33183T) should be classified as a type strain of a novel species, for which the name Paenibacillus albiflavus sp. nov. is proposed.

Genome-Driven Discovery of Enzymes with Industrial Implications from the Genus Aneurinibacillus.

Bacteria belonging to the genus Aneurinibacillus within the family Paenibacillaceae are Gram-positive, endospore-forming, and rod-shaped bacteria inhabiting diverse environments. Currently, there are eight validly described species of Aneurinibacillus; however, several unclassified species have also been reported. Aneurinibacillus spp. have shown the potential for producing secondary metabolites (SMs) and demonstrated diverse types of enzyme activities. These features make them promising candidates with industrial implications. At present, genomes of 9 unique species from the genus Aneurinibacillus are available, which can be utilized to decipher invaluable information on their biosynthetic potential as well as enzyme activities. In this work, we performed the comparative genome analyses of nine Aneurinibacillus species representing the first such comprehensive study of this genus at the genome level. We focused on discovering the biosynthetic, biodegradation, and heavy metal resistance potential of this under-investigated genus. The results indicate that the genomes of Aneurinibacillus contain SM-producing regions with diverse bioactivities, including antimicrobial and antiviral activities. Several carbohydrate-active enzymes (CAZymes) and genes involved in heavy metal resistance were also identified. Additionally, a broad range of enzyme classes were also identified in the Aneurinibacillus pan-genomes, making this group of bacteria potential candidates for future investigations with industrial applications.

English

Using phylogenetic analysis of the 16S rRNA gene 43 Gram-positive, spore-forming bacteria of the phylum Firmicutes were isolated, cultured and identified from five hot water springs in South Africa. Thirty-nine isolates belonged to the family Bacillaceae, genus Bacillus (n = 31) and genus Anoxybacillus (n = 8), while four isolates belonged to the family Paenibacillaceae, genus Brevibacillus. The majority of isolates fell into the Bacillus Bergey’s Group A together with Bacillus subtilis and Bacillus licheniformis. One isolate matched Bacillus panaciterrae which has not previously been described as a hot-spring isolate. Three unknown isolates from this study (BLAST <95% match) and three “uncultured Bacillus” clones of isolates from hot springs in India, China and Indonesia listed in NCBI Genbank, were included in the analysis. When bioinformatic tools: Basic Local Alignment Search Tool (BLAST), in silico amplified rDNA restriction analysis (ARDRA), guanine-cytosine (GC) percentage and phylogenetic analysis are used in combination, but not independently, differentiation between the complex Bacillus and closely related species was possible. Identification that relies solely on BLAST of the 16S rRNA sequence can be misleading. Key words: Bacillus, phylogeny, ARDRA, 16S rDNA, South Africa

Protein profiling as a tool for identifying environmental aerobic endospore-forming bacteria

Aerobic Endospore-Forming Bacteria (AEFB) are taxonomically and physiologically diverse, comprising species of genus Bacillus and related genera of industrial and medical importance. For taxonomic purpose, we applied the matrix-assisted laser desorption/ionization mass spectrometry with time-of-flight to identify 64 environmental AEFB (SDF for Solo do Distrito Federal) and compare the results with those obtained using 16S rRNA gene sequencing. Concordance between the two methods was observed for 93,75% samples at the genus level. Strains were clustered between 2 genera (family Bacillaceae): Bacillus, the most prevalent, and Lysinibacillus. Two other genera, Brevibacillus and Paenibacillus (family Paenibacillaceae) were also distinguished. Gene similarity discriminated an additional genus (Rummeliibacillus). At the species level, the genotyping method achieved superior capacity identifying 93,75% strains. Among 31 strains identified at the species level by protein profiling, 61.29% coincided and both, protein and gene profiling, placed other 32.25% strains within groups of closely related species of Bacillus bearing two or even more species alternatives within the same affiliation cluster. These results suggested the applicability of the score and sequence similarity ranges in a complementary way for initial identification and clustering of closely related samples inside these 64 SDF strains. Our assignments are useful because they clearly identify the genera and restrict the identity of a strain to one or two possible species in the genera, thus clarifying their genetic interrelationships. This study also stresses that combining phenotypic and genotypic methods into polyphasic approaches is essential for a robust assignment of the remarkable genetic and ecological diversity of AEFB.

Longirhabdus pacifica gen. nov., sp. nov., isolated from a deep-sea hydrothermal sediment in the West Pacific Ocean

A novel Gram-stain-negative bacterium, designated as SCSIO 06110T, was isolated from a deep-sea sediment of the West Pacific Ocean. Cells were 0.5-0.8 µm in width and 3.0-4.0 µm in length, spore-forming, rod-shaped with peritrichous flagella. Positive for catalase and urease, negative for oxidase and nitrate reduction. Growth occurred at 15-37 °C, pH 6-9 and 1-5 % (w/v) NaCl, with optimum growth at 28 °C, pH 7 and 3 % (w/v) NaCl. MK-7 was the only menaquinone. The strain possessed diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol and two unidentified phospholipids. Iso-C16 : 0, iso-C15 : 0 and iso-C14 : 0 were the major fatty acids. The novel isolate clustered with genera in the family Paenibacillaceae, but formed a separated branch with the closest relative Chengkuizengella sediminis J15A17T (91.1 % sequence similarity) when compared in a phylogenetic analysis of 16S rRNA gene sequences. The DNA G+C content of strain SCSIO 06110T was 38.5 mol%. Based on the polyphasic data presented, a new genus, Longirhabdus gen. nov., is proposed in the family Paenibacillaceae with the type species Longirhabdus pacifica sp. nov. and the type strain SCSIO 06110T (=DSM 105158T=CGMCC 1.16550T).

Paenibacillus albus sp. nov., a UV radiation-resistant bacterium isolated from soilin Korea.

A novel Gram-stain-positive, motile, white color and endospore-forming bacterium, designated 18JY67-1T, was isolated from soil in Jeju Island, Korea. The strain grow at 15-42°C (optimum 30°C) in R2A medium at pH (6.0-9.5) (optimum 7.5). Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain 18JY67-1T formed a distinct lineage within the family Paenibacillaceae (order Bacillales, class Bacilli), and was closely related to Paenibacillus rhizoryzae (KP675984; 96.9% 16S rRNA gene sequence similarity). The major cellular fatty acids of the strain 18JY67-1T were C16:0 and anteiso-C15:0. The predominant respiratory quinones were MK-7. The major polar lipid was identified as diphosphatidylglycerol. On the basis of phenotypic, chemotaxonomic and genotypic properties clearly indicated that isolate 18JY67-1T represents a novel species within the genus Paenibacillus, for which the name Paenibacillus flavus sp. nov. is proposed. The type strain of Paenibacillus flavus is 18JY67-1T (= KCTC 33959T = JCM 33184T).

Cohnella candidum sp. nov., radiation-resistant bacterium from soil.

A Gram-stain positive, endospore-forming, circular, convex, cream colored, designated strain 18JY8-7T, was isolated from soil collected in Jeju Island, South Korea. Phylogenetic analysis using 16S rRNA gene sequences showed that strain 18JY8-7T formed a distinct lineage within the family Paenibacillaceae (order Bacillales, class Bacilli), and is closely related to Cohnella rhizosphaerae (96.1%, sequence similarity) and Cohnella xylanilytica (96.0%). Optimal growth occurred at 30°C, pH 6.5 and in the absence of NaCl. The predominant cellular fatty acids were anteiso-C15:0 and iso-C16:0. The major respiratory quinone was MK-7. The polar lipids profile comprised of diphosphatidylglycerol, phosphatidylglycerol, and phosphatidylethanolamine. The DNA G + C content was 57.0mol%. The genotypic and phenotypic analyses revealed the differentiation of strain 18JY8-7T from all recognized Cohenella species. The strain 18JY8-7T, therefore represents a novel bacterial species within the family Paenibacillaceae, for which the name Cohnella candidum sp. nov. is proposed. The type strain is 18JY8-7T (= KCTC 33969T = JCM 33199T).

Cohnella faecalis sp. nov., isolated from animal faeces in a karst cave.

A Gram-stain-positive, rod-shaped, endospore-forming, motile and aerobic bacterial isolate, designated strain K2E09-144T, was obtained from animal faeces that were collected from a karst cave in Guizhou province, China. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain K2E09-144T represents a novel member of the genus Cohnella within the family Paenibacillaceae of the phylum Firmicutes. Strain K2E09-144T was phylogenetically closely related to Cohnella nanjingensis D45T (16S rRNA gene sequence similarity 97.0 %). The major cellular fatty acids were anteiso-C15:0, iso-C16:0 and C16 : 0. The major isoprenoid quinone was menaqinone 7 (MK-7). The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, one unidentified phospholipid, four unidentified aminophospholipids, one glycolipid and one unidentified lipid. The isomer type of diamino acid in the cell-wall peptidoglycan was meso-diaminopimelic acid. The genome of strain K2E09-144T comprised 6.43 Mb, and encoded 6029 genes in total. The DNA G+C content of the genomic DNA was 53.3 mol%. Based on its phylogenetic, phenotypic and chemotaxonomic characteristics, strain K2E09-144T is considered to represent a novel species of the genus Cohnella, for which the name Cohnella faecalis sp. nov. is proposed. The type strain is K2E09-144T (=CGMCC 1.13587T=NBRC 113454T).

Paludirhabdus telluriireducens gen. nov., sp. nov. and Paludirhabdus pumila sp. nov., isolated from soil of a mountain wetland and emended description of Gorillibacterium massiliense

Two strains of Gram-stain-positive, endospore-forming, motile by means of peritrichous flagella, aerobic or facultative anaerobic, and rod-shaped bacteria that were designated ON8T and ON6T were isolated from soil collected from a mountain wetland in Gwang-ju, Republic of Korea. The isolates were catalase-positive and oxidase-negative. Cells of ON8T and ON6T grew at 15-35 °C (optimal 30 °C) and 15-40 °C (optimal 30 °C), respectively. The major menaquinone was MK-7 and the major cellular fatty acids (>10 % of the total) were anteiso-C15 : 0, iso-C15 : 0, C14 : 0 and C16 : 0. The predominant polar lipids were diphosphatidylglycerol, aminophospholipid and phospholipid. Meso-diaminopimelic acid was the diagnostic diamino acid in the cell-wall peptidoglycan. The DNA G+C contents of strains ON8T and ON6T were 50.6 and 53.5 mol%, respectively, and the 16S rRNA gene sequence analysis showed that the nearest phylogenetic neighbour of both strains was Gorillibacterium massiliense G5T (93.9 %), followed by the members of the genus Paenibacillus in the family Paenibacillaceae. The DNA-DNA hybridization relatedness value between ON8T and ON6T was 44.1 %, which indicated that they represented distinct species. Based on polyphasic characteristics, a novel genus is proposed with the name Paludirhabdus gen. nov., which consists of two species, Paludirhabdus telluriireducens sp. nov. (the type species; type strain ON8T=KACC 19267T=JCM 31958T) and Paludirhabdus pumila sp. nov. (type strain ON6T=KACC 19266T=JCM 31957T).

Paenibacillus mobilis sp. nov., a Gram-stain-negative bacterium isolated from soil.

A novel Gram-stain-negative bacterium, designated strain S8T, was isolated from a soil sample obtained in Gyeonggi Province, Republic of Korea. Cells of strain S8T were endospore-forming, motile by means of peritrichous flagella, and rod-shaped. S8T colonies were round, convex, wavy and white. Strain S8T grew optimally at 37 °C, pH 6-8, and up to 2.0 % (w/v) NaCl. Based on 16S rRNA gene sequence similarity, strain S8T was affiliated with the genus Paenibacillus in the family Paenibacillaceae and was most closely related to Paenibacillus yonginensis DCY84T and Paenibacillus physcomitrellae XBT (98.8 and 97.1 % sequence similarity). The DNA G+C content of the novel strain was 53.1±0.3 mol%. Strain S8T contained diphosphatidylglycerol, phosphatidylglycerol, two phospholipids, four aminophospholipids, an aminolipid and three unidentified lipids. The major fatty acid was anteiso-branched C15 : 0. The quinone was menaquinone MK-7. The peptidoglycan of strain S8T contained meso-diaminopimelic acid. The DNA-DNA hybridization values of strain S8T with P. yonginensis KCTC 33428T and P. physcomitrellae DSM 29851T were 44 % and 32 %, respectively. Data from the DNA-DNA hybridization, biochemical, phylogenetic and physiological analyses indicate that strain S8T (=KCTC 33848T=JCM 31672T) represents a novel species of the genus Paenibacillus, for which the name Paenibacillus mobilis sp. nov. is proposed.

Paenibacillus translucens sp. nov., isolated from tidal flat sediment.

A Gram-stain-variable, aerobic, rod-shaped, motile and spore-forming bacterial strain, designated CJ11T, was isolated from a tidal flat sediment sample from Ganghwa-do, Republic of Korea. Strain CJ11T grew optimally on R2A at 30 °C and pH 7.0. Sequencing results of the 16S rRNA gene revealed that strain CJ11T possesses two copies of the 16S rRNA gene varying at five nucleotide positions. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain CJ11T belonged to the genus Paenibacillus within the family Paenibacillaceae and was most closely related to Paenibacillus lacus KCTC 33691T (99.36-99.15 % similarity). DNA-DNA relatedness levels of strain CJ11T was 41.7 % (reciprocal, 57.8 %) to P. lacus KCTC 33691T. The G+C content of the genomic DNA was 51.0 mol%. Strain CJ11Tcontained meso-diaminopimelic acid in the cell-wall peptidoglycan. The major isoprenoid quinone was menaquinone-7. The major cellular fatty acids were anteiso-C15 : 0, C16 : 0 and iso-C16 : 0. The predominant polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, two unidentified phospholipids, an unidentified glycolipid and several unidentified lipids. On the basis of the polyphasic taxonomic study, strain CJ11T represents a novel species in the genus Paenibacillus, for which the name Paenibacillustranslucens sp. nov. is proposed. The type strain is CJ11T (=KACC 19304T=JCM 32080T).

Taxonomic hierarchy of the phylum Firmicutes and novel Firmicutes species originated from various environments in Korea.

This study assessed the taxonomic hierarchy of the phylum Firmicutes as well as elucidated the isolation and classification states of novel Firmicutes species isolated from Korean territory. The hierarchical classification system of the phylum Firmicutes has been developed since 1872 when the genus Bacillus was first reported and has been generally adopted since 2001. However, this taxonomic hierarchy is still being modified. Until Feb. 2017, the phylum Firmicutes consisted of seven classes (Bacilli, Clostridia, Erysipelotrichia, Limnochordia, Negativicutes, Thermolithobacteria, and Tissierellia), 13 orders, 45 families, and 421 genera. Firmicutes species isolated from various environments in Korea have been reported from 2000, and 187 species have been approved as of Feb. 2017. All Firmicutes species were affiliated with three classes (Bacilli, Clostridia, and Erysipelotrichia), four orders (Bacillales, Lactobacillales, Clostridiales, and Erysipelotrichales), 17 families, and 54 genera. A total of 173 species belong to the class Bacilli, of which 151 species were affiliated with the order Bacillales and the remaining 22 species with the order Lactobacillales. Twelve species belonging to the class Clostridia were affiliated within only one order, Clostridiales. The most abundant family was Bacillaceae (67 species), followed by the family Paenibacillaceae (56 species). Thirteen novel genera were created using isolates from the Korean environment. A number of Firmicutes species were isolated from natural environments in Korean territory. In addition, a considerable number of species were isolated from artificial resources such as fermented foods. Most Firmicutes species, belonging to the families Bacillaceae, Planococcaceae, and Staphylococcaceae, isolated from Korean fermented foods and solar salterns were halophilic or halotolerant. Firmicutes species were isolated from the whole territory of Korea, especially large numbers from Provinces Gyeonggi, Chungnam, and Daejeon.

Cohnella algarum sp. nov., isolated from a freshwater green alga Paulinella chromatophora.

A Gram-stain-positive, facultatively aerobic and endospore-forming bacterium, designated strain Pch-40T, was isolated from a freshwater green alga, Paulinella chromatophora. Cells were motile rods with a monotrichous polar flagellum showing catalase- and oxidase-positive reactions. Strain Pch-40T grew at 20-50 °C (optimum, 37-40 °C), at pH 5.0-11.0 (optimum, pH 7.0) and in the presence of 0-4.0 % (w/v) NaCl (optimum, 0 %). Menaquinone-7 was detected as the sole isoprenoid quinone. The genomic DNA G+C content of strain Pch-40T was 55.6 mol%. The major cellular fatty acids of strain Pch-40T were C16 : 0, iso-C16 : 0, anteiso-C15 : 0 and anteiso-C17 : 0. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain Pch-40T clearly belonged to the genus Cohnella of the family Paenibacillaceae. Strain Pch-40T was most closely related to Cohnella rhizosphaerae CSE-5610T with a 96.1 % 16S rRNA gene sequence similarity. The phenotypic and chemotaxonomic features and the phylogenetic inference clearly suggested that strain Pch-40T represents a novel species of the genus Cohnella, for which the name Cohnellaalgarum sp. nov. is proposed. The type strain is strain Pch-40T (=KACC 19279T=JCM 32033T).

Draft genome sequence of an endophytic bacterium, Paenibacillus tyrfis strain SUK123, isolated from Santiria apiculata stem

Here we report the draft genome sequence of an endophytic Paenibacillus tyrfis strain isolated from the Universiti Kebangsaan Malaysia reserve forest, Malaysia. The genome size was approximately 8.04Mb, and the assembly consisted of 107 scaffolds with 168 contigs, and had a G+C content of 53%. Phylogenetic analysis of strain SUK123 using the 16S rRNA gene revealed that it belonged to the family Paenibacillaceae with the highest similarity to Paenibacillus elgii SDT (99%). Whole genome comparison of SUK123 with related species using average nucleotide identity (ANI) analysis revealed a similarity of 98% to Paenibacillus tyrfis Mst1T, 94% to Paenibacillus elgii B69T, 91% to Paenibacillus ehimensis A2T, 68% to Paenibacillus polymyxa SC2T and 69% to Paenibacillus alvei DMS29T. The draft genome was deposited at the European Nucleotide Archive (PRJEB21373).

Chengkuizengella sediminis gen. nov. sp. nov., isolated from sediment.

A Gram-stain-positive, aerobic, motile, endospore-forming bacterium, designated strain J15A17T, was isolated from sediment of the South China Sea. The strain was oxidase-positive and catalase-negative. Optimal growth occurred at 33 °C, pH 7.5 and in the presence of 3 % (w/v) NaCl. On the basis of 16S rRNA gene sequence analysis, the strain showed closest similarity (92.8 %) to Paenibacillus puldeungensis strain CAU 9324T. Phylogenetic analysis based on 16S rRNA gene sequences showed that the isolate forms a separate branch within the family Paenibacillaceae, with the genus Cohnella as the most closely related genus. The DNA G+C content of strain J15A17T was 37.4 mol%. The strain contained MK-7 as the sole respiratory quinone; anteiso-C15 : 0 and iso-C16 : 0 were the major cellular fatty acids; and its polar lipid pattern consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, glycolipid and four unidentified phospholipids. The strain displayed the peptidoglycan type A4α l-Lys-d-Asp in the cell wall. Phylogenetic, physiological, biochemical and morphological differences between strain J15A17T and its closest relatives in the genera Cohnella, Fontibacillus and Paenibacillus suggest that strain J15A17T (=KCTC 33759T=MCCC 1H00137T) represents the type strain of a novel species in a new genus within the family Paenibacillaceae, Chengkuizengella sediminis gen. nov. sp. nov.

Aneurinibacillus sediminis sp. nov., isolated from lagoon sediments.

Two bacterial strains (1-10M-8-7-50T and 1M) were isolated from lagoon sediments. The strains were obligately aerobic, Gram-stain-positive, spore-forming, rod-shaped and motile. Both strains were able to grow at 25-60 ˚C (optimum 40-42 ˚C), at pH 6.0-8.8 (optimum pH 7.0-7.5) and with 0-2.0 % (w/v) (optimum 0-0.8 %) NaCl. The predominant cellular fatty acids were iso-C15 : 0 and iso-C15 : 0 2-OH, and the cell-wall peptidoglycan contained meso-diaminopimelic acid, glutamic acid, glycine and alanine. Phosphatidyl-N-methylethanolamine, phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylglycerol, two unidentified phosphoglycolipids and three unidentified lipids were present as polar lipids. Genomic DNA G+C content was 41.9 mol%. 16S rRNA gene sequence comparisons of both strains indicated that they belong to the genus Aneurinibacillus within the family Paenibacillaceae of the class Bacilli. Both strains had a sequence similarity of 97.6 % with Aneurinibacillus migulanus B0270T, 97.6 % with Aneurinibacillus aneurinilyticus ATCC 12856T, 97.5 % with 'Aneurinibacillus humi' U33 and <97 % with other members of the genus Aneurinibacillus. The DNA-DNA reassociation value between strain 1-10M-8-7-50T and 1M was >90 %, while strains 1-10M-8-7-50T and 1M were only 35.1±1, 29.8±1 and 24.5±1 % related to A. migulanus KACC 18173T, A. aneurinilyticus KACC 18174T and 'A. humi' U33, respectively. Distinct morphological, physiological and genotypic differences from the previously described taxa support the classification of strain 1-10M-8-7-50T as a representative of a novel species in the genus Aneurinibacillus, for which the name Aneurinibacillus sediminis sp. nov. is proposed. The type strain is 1-10M-8-7-50T (=KEMB 563-460T=JCM 31819T).