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  1 / 174 MEDLINE  
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[PMID]:29388542
[Au] Autor:Jin QW; Hu YH; Sun L
[Ad] Endereço:1​Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, PR China.
[Ti] Título:Alteromonas oceani sp. nov., isolated from deep-sea sediment of a hydrothermal field.
[So] Source:Int J Syst Evol Microbiol;68(2):657-662, 2018 Feb.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A novel rod-shaped, Gram-stain-negative, aerobic bacterium, designated S35 , was isolated from deep-sea sediment collected from the Pacmanus hydrothermal field, Manus Basin, Papua New Guinea. Strain S35 grew optimally at 28 °C, at pH 7.0-8.0 and in the presence of 2.0 % (w/v) NaCl. 16S rRNA gene sequence analysis indicated that strain S35 shared 97.38-98.55% similarity with the type strains of Alteromonas lipolytica, Alteromonas mediterranea and Aestuariibacterhalophilus. Phylogenetic analysis showed that strain S35 belonged to the genus Alteromonas. The strain contained ubiquinone-8 as the predominant respiratory lipoquinone. Summed feature 3 (C16 : 1ω7c and/or C16 : 1ω7c), summed feature 8 (C18 : 1ω7c and/or C18 : 1ω6c) and C16 : 0 were the major fatty acids. The DNA G+C content of strain S35 was 51.3 mol%. These results indicated that strain S35 represents a novel species of the genus Alteromonas, for which the name Alteromonas oceani sp. nov. (type strain S35 =KCTC 52449 =CGMCC 1.16029 ) is proposed.
[Mh] Termos MeSH primário: Alteromonas/classificação
Sedimentos Geológicos/microbiologia
Fontes Hidrotermais/microbiologia
Filogenia
Água do Mar/microbiologia
[Mh] Termos MeSH secundário: Alteromonas/genética
Alteromonas/isolamento & purificação
Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Papua Nova Guiné
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
Ubiquinona/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (RNA, Ribosomal, 16S); 1339-63-5 (Ubiquinone); CQA993F7P8 (ubiquinone 8)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180202
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002560


  2 / 174 MEDLINE  
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[PMID]:28905702
[Au] Autor:Sinha RK; Krishnan KP; Singh A; Thomas FA; Jain A; John Kurian P
[Ad] Endereço:National Centre for Antarctic and Ocean Research, Headland Sada, Vasco da Gama, Goa, India.
[Ti] Título:Alteromonas pelagimontana sp. nov., a marine exopolysaccharide-producing bacterium isolated from the Southwest Indian Ridge.
[So] Source:Int J Syst Evol Microbiol;67(10):4032-4038, 2017 Oct.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A novel exopolysaccharide-producing strain, designated as 5.12 , was isolated from a sediment sample from the Southwest Indian Ridge, Indian Ocean. The strain was Gram-stain-negative, motile, strictly aerobic, and oxidase- and catalase-positive. It grew optimally at 35 °C, at pH 6.0 and in the presence of 3.5 % (w/v) NaCl. Its major isoprenoid quinone was ubiquinone-8 (Q-8) and summed feature 3 (comprising C16 : 1ω6c and/or C16 : 1ω7c), C16 : 0 and C18 : 1ω7c were the major cellular fatty acids. The DNA G+C content was 46.1 mol%. 16S rRNA gene sequence analysis suggested that strain 5.12 is a member of the genus Alteromonas. Strain 5.12 exhibited close 16S rRNA gene sequence similarity to Alteromonas lipolytica JW12 (96.1 %), Alteromonas hispanica F-32 (95.9 %), Alteromonas confluentis DSSK2-12 (95.9 %), Alteromonas litorea TF-22 (95.6 %) and Alteromonas mediterranea DE (95.5 %). Strain 5.12 contained phosphatidylethanolamine and phosphatidylglycerol as the major polar lipids. Owing to significant differences in the 16S rRNA gene sequences, as well as the phenotypic and chemotaxonomic characteristics, the novel isolate described here merits classification as a representative of a novel species of the genus Alteromonas, for which the name Alteromonas pelagimontana sp. nov. is proposed. The type strain of this species is 5.12 (LMG 29661 = MCC 3250 ).
[Mh] Termos MeSH primário: Alteromonas/classificação
Filogenia
Água do Mar/microbiologia
[Mh] Termos MeSH secundário: Alteromonas/genética
Alteromonas/isolamento & purificação
Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Oceano Índico
Hibridização de Ácido Nucleico
Fosfatidiletanolaminas/química
Fosfatidilgliceróis/química
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
Ubiquinona/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Phosphatidylethanolamines); 0 (Phosphatidylglycerols); 0 (RNA, Ribosomal, 16S); 1339-63-5 (Ubiquinone); 39382-08-6 (phosphatidylethanolamine); CQA993F7P8 (ubiquinone 8)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171101
[Lr] Data última revisão:
171101
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170915
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002245


  3 / 174 MEDLINE  
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[PMID]:28820089
[Au] Autor:Park S; Choi SJ; Park JM; Yoon JH
[Ad] Endereço:Department of Food Science and Biotechnology, Sungkyunkwan University, Jangan-gu, Suwon, Republic of Korea.
[Ti] Título:Alteromonas aestuariivivens sp. nov., isolated from a tidal flat.
[So] Source:Int J Syst Evol Microbiol;67(8):2791-2797, 2017 Aug.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A Gram-stain-negative, aerobic, non-spore-forming, motile and ovoid or rod-shaped bacterial strain, JDTF-113T, was isolated from a tidal flat in Jindo, an island of South Korea. Strain JDTF-113T grew optimally at 30 °C, at pH 7.0-8.0 and in the presence of 2.0 % (w/v) NaCl. A neighbour-joining phylogenetic tree, based on 16S rRNA gene sequences, revealed that strain JDTF-113T fell within the clade enclosing the type strains of species of the genus Alteromonas. Strain JDTF-113T exhibited 16S rRNA gene sequence similarity values of 97.1-98.1 % to the type strains of Alteromonaslipolytica, Alteromonaslitorea, Alteromonasmediterranea, Alteromonasconfluentis, Alteromonas hispanica, Alteromonasgenovensis and Alteromonasmarina, and of 94.8-96.9 % to those of the other species of the genus Alteromonas. Strain JDTF-113T contained Q-8 as the predominant ubiquinone and C16 : 0, summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c) and C18 : 1ω7c as the major fatty acids. The major polar lipids of strain JDTF-113T were phosphatidylethanolamine, phosphatidylglycerol and one unidentified glycolipid. The DNA G+C content of strain JDTF-113T was 51.1 mol% and its mean DNA-DNA relatedness values with the type strains of seven closely phylogenetically related species of the genus Alteromonaswere was 10-23 %. The differential phenotypic properties and phylogenetic and genetic distinctiveness support strain JDTF-113T being separated from species of the genus Alteromonaswith validly publishednames. On the basis of the data presented, strain JDTF-113T is considered to represent a novel species of the genus Alteromonas, for which the name Alteromonas aestuariivivens sp. nov. is proposed. The type strain is JDTF-113T (=KCTC 52655T=NBRC 112708T).
[Mh] Termos MeSH primário: Alteromonas/classificação
Filogenia
Água do Mar/microbiologia
[Mh] Termos MeSH secundário: Alteromonas/genética
Alteromonas/isolamento & purificação
Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Hibridização de Ácido Nucleico
Fosfolipídeos/química
RNA Ribossômico 16S/genética
República da Coreia
Análise de Sequência de DNA
Ubiquinona/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Phospholipids); 0 (RNA, Ribosomal, 16S); 1339-63-5 (Ubiquinone); CQA993F7P8 (ubiquinone 8)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170918
[Lr] Data última revisão:
170918
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170819
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002023


  4 / 174 MEDLINE  
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[PMID]:28604167
[Au] Autor:Cusick KD; Dale JR; Fitzgerald LA; Little BJ; Biffinger JC
[Ad] Endereço:a Chemistry Department , US Naval Research Laboratory , Washington , DC , USA.
[Ti] Título:Adaptation to copper stress influences biofilm formation in Alteromonas macleodii.
[So] Source:Biofouling;33(6):505-519, 2017 Jul.
[Is] ISSN:1029-2454
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:An Alteromonas macleodii strain was isolated from copper-containing coupons incubated in surface seawater (Key West, FL, USA). In addition to the original isolate, a copper-adapted mutant was created and maintained with 0.78 mM Cu . Biofilm formation was compared between the two strains under copper-amended and low-nutrient conditions. Biofilm formation was significantly increased in the original isolate under copper amendment, while biofilm formation was significantly higher in the mutant under low-nutrient conditions. Biofilm expression profiles of diguanylate cyclase (DGC) genes, as well as genes involved in secretion, differed between the strains. Comparative genomic analysis demonstrated that both strains possessed a large number of gene attachment harboring cyclic di-GMP synthesis and/or degradation domains. One of the DGC genes, induced at very high levels in the mutant, possessed a degradation domain in the original isolate that was lacking in the mutant. The genetic and transcriptional mechanisms contributing to biofilm formation are discussed.
[Mh] Termos MeSH primário: Alteromonas/efeitos dos fármacos
Biofilmes/efeitos dos fármacos
Cobre/farmacologia
Desinfetantes/farmacologia
Farmacorresistência Bacteriana/efeitos dos fármacos
Genes Bacterianos
[Mh] Termos MeSH secundário: Alteromonas/genética
Proteínas de Bactérias/genética
Proteínas de Bactérias/metabolismo
Biofilmes/crescimento & desenvolvimento
Cobre/análise
GMP Cíclico/análogos & derivados
GMP Cíclico/biossíntese
Desinfetantes/análise
Farmacorresistência Bacteriana/genética
Proteínas de Escherichia coli/genética
Modelos Teóricos
Mutação
Fósforo-Oxigênio Liases/genética
Água do Mar/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Bacterial Proteins); 0 (Disinfectants); 0 (Escherichia coli Proteins); 61093-23-0 (bis(3',5')-cyclic diguanylic acid); 789U1901C5 (Copper); EC 4.6.- (Phosphorus-Oxygen Lyases); EC 4.6.1.- (diguanylate cyclase); H2D2X058MU (Cyclic GMP)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171003
[Lr] Data última revisão:
171003
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170613
[St] Status:MEDLINE
[do] DOI:10.1080/08927014.2017.1329423


  5 / 174 MEDLINE  
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[PMID]:28056800
[Au] Autor:López-Pérez M; Ramon-Marco N; Rodriguez-Valera F
[Ad] Endereço:Evolutionary Genomics Group, Departamento de Producción Vegetal y Microbiología, Universidad Miguel Hernández, San Juan de Alicante, Apartado 18, San Juan, 03550, Alicante, Spain.
[Ti] Título:Networking in microbes: conjugative elements and plasmids in the genus Alteromonas.
[So] Source:BMC Genomics;18(1):36, 2017 01 05.
[Is] ISSN:1471-2164
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: To develop evolutionary models for the free living bacterium Alteromonas the genome sequences of isolates of the genus have been extensively analyzed. However, the main genetic exchange drivers in these microbes, conjugative elements (CEs), have not been considered in detail thus far. In this work, CEs have been searched in several complete Alteromonas genomes and their sequence studied to understand their role in the evolution of this genus. Six genomes are reported here for the first time. RESULTS: We have found nine different plasmids of sizes ranging from 85 to 600 Kb, most of them were found in a single strain. Networks of gene similarity could be established among six of the plasmids that were also connected with another cluster of plasmids found in Shewanella strains. The cargo genes found in these plasmids included cassettes found before in chromosome flexible genomic islands of Alteromonas strains. We describe also the plasmids pAMCP48-600 and pAMCP49-600, the largest found in Alteromonas thus far (ca. 600 Kb) and containing all the hallmarks to be classified as chromids. We found in them some housekeeping genes and a cluster that code for an exocellular polysaccharide. They could represent the transport vectors for the previously described replacement flexible genomic islands. Integrative and conjugative elements (ICEs) were more common than plasmids and showed similar patterns of variation with cargo genes coding for components of additive flexible genomic islands. A nearly identical ICE was found in A. mediterranea MED64 and Vibrio cholera AHV1003 isolated from a human pathogen, indicating the potential exchange of these genes across phylogenetic distances exceeding the family threshold. CONCLUSION: We have seen evidence of how CEs can be vectors to transfer gene cassettes acquired in the chromosomal flexible genomic islands, both of the additive and replacement kind. These CEs showed evidence of how genetic material is exchanged among members of the same species but also (albeit less frequently) across genus and family barriers. These gradients of exchange frequency are probably one of the main drivers of species origin and maintenance in prokaryotes and also provide these taxa with large genetic diversity.
[Mh] Termos MeSH primário: Alteromonas/genética
Conjugação Genética
Genoma Bacteriano
Genômica
Plasmídeos/genética
[Mh] Termos MeSH secundário: Alteromonas/classificação
Alteromonas/metabolismo
Composição de Bases
Biologia Computacional/métodos
Genômica/métodos
Fases de Leitura Aberta
Filogenia
Polimorfismo de Nucleotídeo Único
Mapeamento de Interação de Proteínas
Mapas de Interação de Proteínas
Proteoma
Proteômica/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Proteome)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171120
[Lr] Data última revisão:
171120
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170107
[St] Status:MEDLINE
[do] DOI:10.1186/s12864-016-3461-0


  6 / 174 MEDLINE  
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[PMID]:27902291
[Au] Autor:Shi XL; Wu YH; Jin XB; Wang CS; Xu XW
[Ad] Endereço:Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, 310012, PR China.
[Ti] Título:Alteromonas lipolytica sp. nov., a poly-beta-hydroxybutyrate-producing bacterium isolated from surface seawater.
[So] Source:Int J Syst Evol Microbiol;67(2):237-242, 2017 Feb.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Strain JW12T, isolated from surface seawater of the Arabian Sea, was subjected to characterization by a polyphasic taxonomic approach. Cells of the isolate were Gram-stain-negative, aerobic and rod-shaped. It accumulated poly-ß-hydroxybutyrate. On the basis of 16S rRNA gene sequence analysis, strain JW12T was closely related to Alteromonas confluentis, with 16S rRNA gene sequence similarity of 98.0 %. Phylogenetic analysis revealed that it fell within the cluster of the genus Alteromonas and represented one independent lineage with A. confluentis. The average nucleotide identity (ANI) value and the genome-to-genome distance between strain JW12T and A. confluentis KCTC 42603T were 70.0 and 21.3 %, respectively. The sole respiratory quinone was ubiquinone-8 (Q8). The principal fatty acids were summed feature 3 (C16 : 1ω7c and/or iso-C15 : 0 2-OH), C16 : 0 and C18 : 1ω7c. The major polar lipids included phosphatidylethanolamine, phosphatidylglycerol, two unidentified glycolipids and one aminophospholipid. The DNA G+C content was 48.4 mol%. Differential phylogenetic distinctiveness and chemotaxonomic differences, together with phenotypic properties obtained in this study, revealed that strain JW12T could be differentiated from the closely related species. Therefore, it is proposed that strain JW12T represents a novel species in the genus Alteromonas, for which the name Alteromonas lipolytica sp. nov. (type strain, JW12T=CGMCC 1.15735T=KCTC 52408T=MCCC 1K03175T), is proposed.
[Mh] Termos MeSH primário: Alteromonas/classificação
Hidroxibutiratos/metabolismo
Filogenia
Poliésteres/metabolismo
Água do Mar/microbiologia
[Mh] Termos MeSH secundário: Alteromonas/genética
Alteromonas/isolamento & purificação
Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Oceano Índico
Hibridização de Ácido Nucleico
Fosfolipídeos/química
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Hydroxybutyrates); 0 (Phospholipids); 0 (Polyesters); 0 (RNA, Ribosomal, 16S); 26063-00-3 (poly-beta-hydroxybutyrate)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170817
[Lr] Data última revisão:
170817
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161201
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.001604


  7 / 174 MEDLINE  
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[PMID]:27380907
[Au] Autor:Machado H; Vynne NG; Christiansen G; Gram L
[Ad] Endereço:1​Department of Systems Biology, Technical University of Denmark, Matematiktorvet, bldg. 301, DK-2800 Kgs. Lyngby, Denmark 2​Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kogle Allè 6, DK-2970 Hørsholm, Denmark.
[Ti] Título:Reclassification of Alteromonas fuliginea (Romanenko et al. 1995) as Pseudoalteromonas fuliginea comb. nov. and an emended description.
[So] Source:Int J Syst Evol Microbiol;66(9):3737-3742, 2016 Sep.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A new aerobic marine bacterium, strain S3431, was isolated from swab samples of an unidentified polychaete near Canal Concepción, Chile. This strain was thought to represent a new taxon within the genus Pseudoalteromonas. Although DNA-DNA reassociation values showed less than 70 % genomic DNA relatedness to established Pseudoalteromonas type strains, it shared 78 % DNA-DNA relatedness with Alteromonas fuliginea DSM 15748 (=KMM 216) (Romanenko et al., 1994). A. fuliginea has later been considered a heterotypic synonym of Pseudoalteromonas citrea(Ivanova et al., 1998). Relatedness between strains S3431, A. fuliginea DSM 15748 and the type strain P. citrea LMG 12323T was therefore studied. Physiological traits and genomic information were shared at a high level by strains S3431 and DSM 15748, but not between these and P. citrea LMG 12323T. There was only approximately 20 % DNA-DNA relatedness between P. citrea LMG 12323T and strains S3431 and DSM 15748. Based on the available phylogenetic and phenotypic data, the reclassification of A. fuliginea DSM 15748 (Romanenko et al., 1995) → Pseudoalteromonas citrea(Ivanova et al., 1998) as Pseudoalteromonas fuligineacomb. nov. is proposed, and strain S3431 should be assigned to this new species. The name Pseudoalteromonas fuliginea is proposed with KMM 216T (=DSM 15748T=CIP 105339T) as the type strain.
[Mh] Termos MeSH primário: Alteromonas/classificação
Filogenia
Poliquetos/microbiologia
Pseudoalteromonas/classificação
[Mh] Termos MeSH secundário: Animais
Técnicas de Tipagem Bacteriana
Chile
DNA Bacteriano/genética
Hibridização de Ácido Nucleico
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (RNA, Ribosomal, 16S)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170817
[Lr] Data última revisão:
170817
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160707
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.001259


  8 / 174 MEDLINE  
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[PMID]:27189983
[Au] Autor:López-Pérez M; Rodriguez-Valera F
[Ad] Endereço:Evolutionary Genomics Group, Departamento de Producción Vegetal y Microbiología, Universidad Miguel Hernández, Alicante, Spain.
[Ti] Título:Pangenome Evolution in the Marine Bacterium Alteromonas.
[So] Source:Genome Biol Evol;8(5):1556-70, 2016 06 03.
[Is] ISSN:1759-6653
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:We have examined a collection of the free-living marine bacterium Alteromonas genomes with cores diverging in average nucleotide identities ranging from 99.98% to 73.35%, i.e., from microbes that can be considered members of a natural clone (like in a clinical epidemiological outbreak) to borderline genus level. The genomes were largely syntenic allowing a precise delimitation of the core and flexible regions in each. The core was 1.4 Mb (ca. 30% of the typical strain genome size). Recombination rates along the core were high among strains belonging to the same species (37.7-83.7% of all nucleotide polymorphisms) but they decreased sharply between species (18.9-5.1%). Regarding the flexible genome, its main expansion occurred within the boundaries of the species, i.e., strains of the same species already have a large and diverse flexible genome. Flexible regions occupy mostly fixed genomic locations. Four large genomic islands are involved in the synthesis of strain-specific glycosydic receptors that we have called glycotypes. These genomic regions are exchanged by homologous recombination within and between species and there is evidence for their import from distant taxonomic units (other genera within the family). In addition, several hotspots for integration of gene cassettes by illegitimate recombination are distributed throughout the genome. They code for features that give each clone specific properties to interact with their ecological niche and must flow fast throughout the whole genus as they are found, with nearly identical sequences, in different species. Models for the generation of this genomic diversity involving phage predation are discussed.
[Mh] Termos MeSH primário: Alteromonas/genética
Organismos Aquáticos/genética
Evolução Molecular
Variação Genética
[Mh] Termos MeSH secundário: Genoma Bacteriano
Anotação de Sequência Molecular
Filogenia
Análise de Sequência de DNA
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1703
[Cu] Atualização por classe:170302
[Lr] Data última revisão:
170302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160519
[St] Status:MEDLINE
[do] DOI:10.1093/gbe/evw098


  9 / 174 MEDLINE  
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[PMID]:27128996
[Au] Autor:Aharonovich D; Sher D
[Ad] Endereço:Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Haifa, Israel.
[Ti] Título:Transcriptional response of Prochlorococcus to co-culture with a marine Alteromonas: differences between strains and the involvement of putative infochemicals.
[So] Source:ISME J;10(12):2892-2906, 2016 12.
[Is] ISSN:1751-7370
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Interactions between marine microorganisms may determine the dynamics of microbial communities. Here, we show that two strains of the globally abundant marine cyanobacterium Prochlorococcus, MED4 and MIT9313, which belong to two different ecotypes, differ markedly in their response to co-culture with a marine heterotrophic bacterium, Alteromonas macleodii strain HOT1A3. HOT1A3 enhanced the growth of MIT9313 at low cell densities, yet inhibited it at a higher concentration, whereas it had no effect on MED4 growth. The early transcriptomic responses of Prochlorococcus cells after 20 h in co-culture showed no evidence of nutrient starvation, whereas the expression of genes involved in photosynthesis, protein synthesis and stress responses typically decreased in MED4 and increased in MIT313. Differential expression of genes involved in outer membrane modification, efflux transporters and, in MIT9313, lanthipeptides (prochlorosins) suggests that Prochlorococcus mount a specific response to the presence of the heterotroph in the cultures. Intriguingly, many of the differentially-expressed genes encoded short proteins, including two new families of co-culture responsive genes: CCRG-1, which is found across the Prochlorococcus lineage and CCRG-2, which contains a sequence motif involved in the export of prochlorosins and other bacteriocin-like peptides, and are indeed released from the cells into the media.
[Mh] Termos MeSH primário: Alteromonas/crescimento & desenvolvimento
Prochlorococcus/genética
Água do Mar/microbiologia
[Mh] Termos MeSH secundário: Alteromonas/genética
Alteromonas/isolamento & purificação
Alteromonas/metabolismo
Proteínas de Bactérias/genética
Proteínas de Bactérias/metabolismo
Técnicas de Cocultura
Processos Heterotróficos
Prochlorococcus/isolamento & purificação
Prochlorococcus/metabolismo
Transcriptoma
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Bacterial Proteins)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171127
[Lr] Data última revisão:
171127
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160430
[St] Status:MEDLINE
[do] DOI:10.1038/ismej.2016.70


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[PMID]:27059936
[Au] Autor:Mitulla M; Dinasquet J; Guillemette R; Simon M; Azam F; Wietz M
[Ad] Endereço:Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, 26129 Oldenburg, Germany.
[Ti] Título:Response of bacterial communities from California coastal waters to alginate particles and an alginolytic Alteromonas macleodii strain.
[So] Source:Environ Microbiol;18(12):4369-4377, 2016 Dec.
[Is] ISSN:1462-2920
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Alginate is a major cell wall polysaccharide from marine macroalgae and nutrient source for heterotrophic bacteria. Alginate can form gel particles in contact with divalent cations as found in seawater. Here, we tested the hypothesis that alginate gel particles serve as carbon source and microhabitat for marine bacteria by adding sterile alginate particles to microcosms with seawater from coastal California, a habitat rich in alginate-containing macroalgae. Alginate particles were rapidly colonized and degraded, with three- to eightfold higher bacterial abundances and production among alginate particle-associated (PA) bacteria. 16S rRNA gene amplicon sequencing showed that alginate PA bacteria were enriched in OTUs related to Cryomorphaceae, Saprospiraceae (Bacteroidetes) and Phaeobacter (Alphaproteobacteria) towards the end of the experiment. In microcosms amended with alginate particles and the proficient alginolytic bacterium Alteromonas macleodii strain 83-1, this strain dominated the community and outcompeted Cryomorphaceae, Saprospiraceae and Phaeobacter, and PA hydrolytic activities were over 50% higher. Thus, alginolytic activity by strain 83-1 did not benefit non-alginolytic strains by cross-feeding on alginate hydrolysis or other metabolic products. Considering the global distribution and extensive biomass of alginate-containing macroalgae, the observed bacterial dynamics associated with the utilization and remineralization of alginate microhabitats promote the understanding of carbon cycling in macroalgae-rich waters worldwide.
[Mh] Termos MeSH primário: Alginatos/metabolismo
Alteromonas/metabolismo
Bactérias/metabolismo
Água do Mar/microbiologia
[Mh] Termos MeSH secundário: Alteromonas/genética
Alteromonas/isolamento & purificação
Bactérias/classificação
Bactérias/genética
Bactérias/isolamento & purificação
California
Ecossistema
Ácido Glucurônico/metabolismo
Ácidos Hexurônicos/metabolismo
Filogenia
RNA Ribossômico 16S/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Alginates); 0 (Hexuronic Acids); 0 (RNA, Ribosomal, 16S); 8A5D83Q4RW (Glucuronic Acid); 8C3Z4148WZ (alginic acid)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170807
[Lr] Data última revisão:
170807
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160410
[St] Status:MEDLINE
[do] DOI:10.1111/1462-2920.13314



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