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Sun Y, Zhang HJ, Chen R, Zhao HB, Lee WH. 16S rDNA analysis of the intestinal microbes in osteoporotic rats. BIOSCIENCE OF MICROBIOTA FOOD AND HEALTH 2021; 40:156-167. [PMID: 34285861 PMCID: PMC8279887 DOI: 10.12938/bmfh.2020-065] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 02/12/2021] [Indexed: 01/14/2023]
Abstract
This study aimed to reveal the differences in intestinal microbes in osteoporotic rats.
The rats were divided into two groups: the control and OP (osteoporosis) groups
(n=6). Days 0 and 70 were set as the time points. The rats in the OP
group underwent bilateral ovariectomy (OVX). Differences between the control and OP groups
were determined by 16S rDNA analysis. The relative abundances of OTUs and alpha/beta
diversities were determined at days 0 days and 70. The abundances of
Verrucomicrobia at the phylum level and Aerococcus,
Coprobacillus, Veillonella,
Anaerobiospirillum, Flavobacterium,
Comamonadaceae, Ohtaekwangia, etc., at the genus level
were found to be different between the control_70d and OP_70d groups. KEGG ontology
analysis showed that the function of lipid metabolism could be related to OP. The 16S rDNA
analysis in the OP rats revealed that intestinal microbes take part in the processes of OP
and could affect lipid metabolism. Further study of the relationship between OP and
intestinal microbes is necessary, and the prospect for intestinal microbes is a potential
treatment for OP.
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Affiliation(s)
- Yan Sun
- Pharmaceutical College & Key Laboratory of Pharmacology for Natural Products of Yunnan Province, Kunming Medical University, Kunming, Yunnan 650500, China.,Key Laboratory of Bio-active Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology, Kunming, Yunnan 650032, China
| | - Hui-Jie Zhang
- Key Laboratory of Bio-active Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology, Kunming, Yunnan 650032, China
| | - Ran Chen
- Department of Clinical Lab, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650000, China
| | - Hong-Bin Zhao
- Department of Emergency Trauma, The First People's Hospital of Yunnan Province, Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan 650032, China
| | - Wen-Hui Lee
- Key Laboratory of Bio-active Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology, Kunming, Yunnan 650032, China
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Mei YZ, Huang PW, Liu Y, He W, Fang WW. Cold stress promoting a psychrotolerant bacterium Pseudomonas fragi P121 producing trehaloase. World J Microbiol Biotechnol 2016; 32:134. [PMID: 27339315 DOI: 10.1007/s11274-016-2097-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Accepted: 06/14/2016] [Indexed: 10/21/2022]
Abstract
A newly isolated Pseudomonas fragi P121 strain in a soil sample taken from the Arctic Circle is able to produce trehalose. The P121 strain was able to grow at temperatures ranging from 4 to 25 °C, had an optimum pH of 6.5, and an optimum salt concentration of 2 %. The P121 strain had a survival rate of 29.1 % after being repeatedly frozen and thawed five times, and a survival rate of 78.9 % when placed in physiological saline for 15 days at 20 °C after cold shock, which is far higher than the type strain Pseudomonas fragi ATCC 4973. The P121 strain could produce 2.89 g/L trehalose, which was 18.6 % of dry cell weight within 52 h in a 25 L fermention tank using the malt extract prepared from barley as medium at 15 °C, while only 11.8 % of dry cell weight at 20 °C. These results suggested that cold stress promoted the strain producing trehalose. It is the first reported cold-tolerant bacterium that produces trehalose, which may protect cells against the cold environment.
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Affiliation(s)
- Yan-Zhen Mei
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Nanjing, 210023, Jiangsu Province, China.
| | - Peng-Wei Huang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Nanjing, 210023, Jiangsu Province, China
| | - Yang Liu
- College of Life Science, Inner Mongolia University, Hohhot, 010021, Inner Mongolia, China
| | - Wei He
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Nanjing, 210023, Jiangsu Province, China
| | - Wen-Wan Fang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Nanjing, 210023, Jiangsu Province, China
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3
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Wang Y, Ji B, Wu W, Wang R, Yang Z, Zhang D, Tian W. Hepatoprotective effects of kombucha tea: identification of functional strains and quantification of functional components. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2014; 94:265-272. [PMID: 23716136 DOI: 10.1002/jsfa.6245] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Accepted: 05/28/2013] [Indexed: 06/02/2023]
Abstract
BACKGROUND Kombucha tea (KT), a traditional health beverage containing potential hepatoprotective agents, is fermented from sugared tea by a symbiotic culture of yeast and bacteria for 8 days. However, the functional strains that produce components for the hepatoprotective property of KT remain unclear. Multiple strains are involved in traditional KT production. Therefore, KT has not been standardized or produced commercially. This study aimed to identify the functional strains and quantify the functional components with hepatoprotective effects in kombucha tea. RESULTS Gluconacetobacter sp. A4 was one of the microorganisms in KT in which the D-saccharic acid-1,4-lactone (DSL) produced by G. sp. A4 was significantly higher than that produced by original tea fungus at 8 days of fermentation. Traditional KT (TKT, tea broth fermented by mixed tea fungus), modified KT (MKT, fermented by single G. sp. A4), and DSL significantly inhibited the acetaminophen-induced increase of alanine aminotransferase, alkaline phosphatase, triglyceride and malondialdehyde, as well as facilitating the reduction of total antioxidant capacity in mice. Furthermore, MKT and TKT are both similar to DSL in terms of protection against acetaminophen-induced liver injury in mice. These results suggested a positive relationship between DSL content and the hepatoprotective effect of TKT, MKT and DSL groups. CONCLUSION G. sp. A4 was concluded to be a potential functional strain and DSL might be the key functional component for the hepatoprotective property in KT. The stronger capability of G. sp. A4 in producing DSL makes it a better choice for the commercial production of KT.
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Affiliation(s)
- Yong Wang
- College of Engineering, China Agricultural University, Beijing, 100083, People's Republic of China
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4
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Cloning, purification and biochemical properties of a thermostable pectinase from Bacillus halodurans M29. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcatb.2013.05.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Li Y, Xu X, Dietrich M, Urlacher VB, Schmid RD, Ouyang P, He B. Identification and functional expression of a Δ9 fatty acid desaturase from the marine bacterium Pseudoalteromonas sp. MLY15. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.07.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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6
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Enzymatic production of l-amino acids from the corresponding dl-5-substituted hydantoins by Bacillus fordii MH602. World J Microbiol Biotechnol 2007. [DOI: 10.1007/s11274-007-9485-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Mei Y, He B, Liu N, Ouyang P. Screening and distributing features of bacteria with hydantoinase and carbamoylase. Microbiol Res 2007; 164:322-9. [PMID: 17498938 DOI: 10.1016/j.micres.2006.12.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2006] [Revised: 09/11/2006] [Accepted: 12/05/2006] [Indexed: 11/23/2022]
Abstract
Hydantoinase and carbamoylase are key biocatalysts for the production of optically pure amino acids from dl-5-substituted hydantoins (SSH). Out of 364 isolated strains with hydantoinase and carbamoylase at 45 degrees C, 24 strains showed efficient hydantoinase and carbamoylase activities. Among them, 17 produced l-amino acids, and 7 produced d-amino acids from both aromatic dl-5-benzylhydantoin and aliphatic dl-5-isopropylhydantoin. Most of the strains that were able to form l-amino acid belonged to genera Bacillus, Geobacillus, Brevibacillus, Aneurinibacillus, Microbacterium, and Kurthia. Phylogenetic relationships were investigated based on 16S rRNA from the hydantoinase-producing bacteria. Distinct tendencies toward certain genera were observed between most of the strains forming l-amino acids and d-amino acids from SSH. The results from this study can be utilized to develop new isolation technology of hydantoinase-producing microorganisms, and to understand metabolism and evolutionary origins of hydantoinase and carbamoylase among different bacteria.
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Affiliation(s)
- Yanzhen Mei
- College of Life Science and Pharmacy, Nanjing University of Technology, Nanjing, China
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8
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Stanton TB, Humphrey SB. Isolation of tetracycline-resistant Megasphaera elsdenii strains with novel mosaic gene combinations of tet(O) and tet(W) from swine. Appl Environ Microbiol 2003; 69:3874-82. [PMID: 12839756 PMCID: PMC165211 DOI: 10.1128/aem.69.7.3874-3882.2003] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Anaerobic bacteria insensitive to chlortetracycline (64 to 256 microg/ml) were isolated from cecal contents and cecal tissues of swine fed or not fed chlortetracycline. A nutritionally complex, rumen fluid-based medium was used for culturing the bacteria. Eight of 84 isolates from seven different animals were identified as Megasphaera elsdenii strains based on their large-coccus morphology, rapid growth on lactate, and 16S ribosomal DNA sequence similarities with M. elsdenii LC-1(T). All eight strains had tetracycline MICs of between 128 and 256 microg/ml. Based on PCR assays differentiating 14 tet classes, the strains gave a positive reaction for the tet(O) gene. By contrast, three ruminant M. elsdenii strains recovered from 30-year-old culture stocks had tetracycline MICs of 4 microg/ml and did not contain tet genes. The tet genes of two tetracycline-resistant M. elsdenii strains were amplified and cloned. Both genes bestowed tetracycline resistance (MIC = 32 to 64 microg/ml) on recombinant Escherichia coli strains. Sequence analysis revealed that the M. elsdenii genes represent two different mosaic genes formed by interclass (double-crossover) recombination events involving tet(O) and tet(W). One or the other genotype was present in each of the eight tetracycline-resistant M. elsdenii strains isolated in these studies. These findings suggest a role for commensal bacteria not only in the preservation and dissemination of antibiotic resistance in the intestinal tract but also in the evolution of resistance.
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MESH Headings
- Animals
- Anti-Bacterial Agents/pharmacology
- Bacteria, Anaerobic/classification
- Bacteria, Anaerobic/drug effects
- Bacteria, Anaerobic/genetics
- Bacteria, Anaerobic/isolation & purification
- Bacterial Proteins/genetics
- Carrier Proteins/genetics
- Cecum/microbiology
- Chlortetracycline/pharmacology
- Culture Media
- DNA, Ribosomal/analysis
- Evolution, Molecular
- Gram-Positive Cocci/classification
- Gram-Positive Cocci/drug effects
- Gram-Positive Cocci/genetics
- Gram-Positive Cocci/isolation & purification
- Lactates/metabolism
- Microbial Sensitivity Tests
- Molecular Sequence Data
- Polymerase Chain Reaction
- RNA, Ribosomal, 16S/genetics
- Recombination, Genetic
- Sequence Analysis, DNA
- Swine
- Tetracycline Resistance/genetics
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Affiliation(s)
- Thaddeus B Stanton
- Pre-Harvest Food Safety and Enteric Diseases Research Unit, National Animal Disease Center, Agricultural Research Service, U.S. Department of Agriculture, PO Box 70, Ames, IA 50010, USA.
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Trott DJ, Moeller MR, Zuerner RL, Goff JP, Waters WR, Alt DP, Walker RL, Wannemuehler MJ. Characterization of Treponema phagedenis-like spirochetes isolated from papillomatous digital dermatitis lesions in dairy cattle. J Clin Microbiol 2003; 41:2522-9. [PMID: 12791876 PMCID: PMC156514 DOI: 10.1128/jcm.41.6.2522-2529.2003] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2002] [Revised: 12/23/2002] [Accepted: 03/05/2003] [Indexed: 11/20/2022] Open
Abstract
Four spirochete strains were isolated from papillomatous digital dermatitis (PDD) lesions in Iowa dairy cattle and compared with two previously described spirochete strains isolated from dairy cattle in California. These six strains shared an identical 16S ribosomal DNA sequence that was 98% similar to Treponema phagedenis and 99% similar to the uncultivated PDD spirochete sequence DDLK-4. The whole-cell protein profiles resolved by sodium dodecyl sulfate-polyacrylamide gel electrophoresis of these six strains were similar. However, these strains showed differences in the antigenic diversity of lipopolysaccharide (LPS). Genetic diversity was also detected by pulsed-field gel electrophoresis of genomic DNA digests, revealing differences among five of the six strains. Serum immunoglobulin G antibodies from dairy cattle with active PDD lesions reacted with the LPS of all but one PDD spirochete strain. Likewise, peripheral blood mononuclear cells from cattle with active PDD lesions produced blastogenic responses to one of the two California isolates. Both antibody and lymphocyte blastogenic responses were reduced in convalescent dairy cattle, suggesting the immune response to these spirochetes has short duration. These results demonstrate genetic and antigenic diversity among T. phagedenis-like treponemes and provide further evidence for the involvement of these spirochetes in the pathogenesis of PDD.
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Affiliation(s)
- Darren J Trott
- School of Veterinary Science, The University of Queensland, St. Lucia, Queensland, Australia.
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10
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Rudi K, Nogva HK, Moen B, Nissen H, Bredholt S, Møretrø T, Naterstad K, Holck A. Development and application of new nucleic acid-based technologies for microbial community analyses in foods. Int J Food Microbiol 2002; 78:171-80. [PMID: 12222632 DOI: 10.1016/s0168-1605(02)00236-2] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Several challenges still persist in the analysis of microorganisms in foods, particularly in studies of complex communities. Nucleic acid-based methods are promising tools in addressing new questions concerning microbial communities. We have developed several new methods in the field of nucleic acid-based microbial community analyses. These methods cover both sample preparation and detection approaches. The sample preparation method involves simplified DNA purification using paramagnetic beads. As an extension of this method, the same paramagnetic beads are used for both cell separation and DNA purification. This enables full automation. The separate detection of viable and dead bacteria is a major issue in nucleic acid-based diagnostics. We have applied a living/dead dye that binds covalently to DNA and inhibits the PCR from dead cells. In addition, a DNA array-based detection assay has been developed. The assay combines the specificity obtained by enzymatic labeling of DNA probes with the possibility of detecting several targets simultaneously by DNA array hybridization. In combination with 16S rDNA amplification, this is a promising tool for community analyses. Also, we have developed a novel approach for multiplex quantitative PCR. The multiplex PCR has been combined with our DNA array-based detection method. Finally, we are now in the process of adapting a system for monitoring microbial growth and death in real-time through the tagging of bacteria with green fluorescent protein (GFP) combined with fluorescence detection using a high-resolution confocal laser scanner.
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Affiliation(s)
- Knut Rudi
- MATFORSK, Norwegian Food Research Institute, As.
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11
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Nanda K, Taniguchi M, Ujike S, Ishihara N, Mori H, Ono H, Murooka Y. Characterization of acetic acid bacteria in traditional acetic acid fermentation of rice vinegar (komesu) and unpolished rice vinegar (kurosu) produced in Japan. Appl Environ Microbiol 2001; 67:986-90. [PMID: 11157275 PMCID: PMC92679 DOI: 10.1128/aem.67.2.986-990.2001] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Bacterial strains were isolated from samples of Japanese rice vinegar (komesu) and unpolished rice vinegar (kurosu) fermented by the traditional static method. Fermentations have never been inoculated with a pure culture since they were started in 1907. A total of 178 isolates were divided into groups A and B on the basis of enterobacterial repetitive intergenic consensus-PCR and random amplified polymorphic DNA fingerprinting analyses. The 16S ribosomal DNA sequences of strains belonging to each group showed similarities of more than 99% with Acetobacter pasteurianus. Group A strains overwhelmingly dominated all stages of fermentation of both types of vinegar. Our results indicate that appropriate strains of acetic acid bacteria have spontaneously established almost pure cultures during nearly a century of komesu and kurosu fermentation.
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Affiliation(s)
- K Nanda
- Research Center, Tamanoi Vinegar Co., Ltd., 100, Nishimachi, Yamatokoriyama, Nara 639-1038, Japan
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12
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Perreten V, Kollöffel B, Teuber M. Conjugal Transfer of the Tn916-like Transposon TnFO1 from Enterococcus faecalis Isolated from Cheese to Other Gram-positive Bacteria. Syst Appl Microbiol 1997. [DOI: 10.1016/s0723-2020(97)80045-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Sievers M, Alonso L, Gianotti S, Boesch C, Teuber M. 16S-23S ribosomal RNA spacer regions of Acetobacter europaeus and A. xylinum, tRNA genes and antitermination sequences. FEMS Microbiol Lett 1996; 142:43-8. [PMID: 8759788 DOI: 10.1111/j.1574-6968.1996.tb08405.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The 16S-23S ribosomal RNA spacer regions of Acetobacter europaeus DSM 6160, A. xylinum NCIB 11664 and A. xylinum CL27 were amplified by PCR. Specific PCR products were obtained from each strain and their nucleotide sequences determined. The spacer region of A. europaeus comprises 768 nucleotides (nt), that of A. xylinum 778 nt and that of A. xylinum CL27 759 nt. Genes encoding tRNAIle and tRNAAla were identified. Putative antitermination sequences were found between the tRNAAla sequence and the 5'-terminus of the 23S rRNA coding sequence. The boxA element has the nucleotide sequence TGCTCTTTGATA. Based on hybridization data of digested chromosomal DNA with spacer-specific probes, the copy number of the rrn operons on the chromosome of Acetobacter strains is estimated to be four.
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MESH Headings
- Base Sequence
- DNA Primers/genetics
- DNA, Bacterial/chemistry
- DNA, Bacterial/genetics
- DNA, Ribosomal/chemistry
- DNA, Ribosomal/genetics
- Gene Amplification
- Genes, Bacterial
- Gluconacetobacter xylinus/genetics
- Molecular Sequence Data
- Nucleic Acid Conformation
- Polymerase Chain Reaction
- RNA, Ribosomal, 16S/genetics
- RNA, Ribosomal, 23S/genetics
- Sequence Homology, Nucleic Acid
- Terminator Regions, Genetic
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Affiliation(s)
- M Sievers
- Food Microbiology, ETH-Zürich, Switzerland.
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14
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Sievers M, Gaberthüel C, Boesch C, Ludwig W, Teuber M. Phylogenetic position of Gluconobacter species as a coherent cluster separated from all Acetobacter species on the basis of 16S ribosomal RNA sequences. FEMS Microbiol Lett 1995; 126:123-6. [PMID: 7705603 DOI: 10.1111/j.1574-6968.1995.tb07404.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The 16S rRNA sequences from the Gluconobacter species G. asaii, G. cerinus and G. frateurii were determined and compared with homologous sequences from published databases and sequences of G. oxydans and Acetobacter species previously described [Sievers, M., Ludwig, W. and Teuber, M. (1994) System. Appl. Microbiol. 17, 189-196]. The Gluconobacter species have unique 16S rRNA sequences and exhibit sequence similarity values of 97.4 to 99.1%, corresponding to 36 to 14 base differences. The phylogenetic tree inferring methods (distance matrix, maximum parsimony and maximum likelihood) show that the species of Gluconobacter form a coherent, closely related cluster. Based on the distance matrix method including Rhodopila globiformis as an outgroup reference organism, Gluconobacter is well separated from Acetobacter.
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Affiliation(s)
- M Sievers
- Institut für Lebensmittelwissenschaft, Labor für Lebensmittelmikrobiologie, ETH-Zürich, Switzerland
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15
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Sievers M, Ludwig W, Teuber M. Phylogenetic Positioning of Acetobacter, Gluconobacter, Rhodopila and Acidiphilium Species as a Branch of Acidophilic Bacteria in the α-subclass of Proteobacteria Based on 16S Ribosomal DNA Sequences. Syst Appl Microbiol 1994. [DOI: 10.1016/s0723-2020(11)80006-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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16
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17
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Lansing M, Lellig S, Mausolf A, Martini I, Crescenzi F, O'Regan M, Prehm P. Hyaluronate synthase: cloning and sequencing of the gene from Streptococcus sp. Biochem J 1993; 289 ( Pt 1):179-84. [PMID: 8424756 PMCID: PMC1132147 DOI: 10.1042/bj2890179] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The complete nucleotide sequence of hyaluronate synthase from Streptococcus sp. and its flanking regions is presented. The gene locus was designated has. Southern-blotting results suggested that the gene was conserved in hyaluronate-producing streptococci. A putative translation-initiation codon was identified and the open reading frame consists of 1566 bp, specifying a protein of 56 kDa. Sequences resembling the promoter and ribosome-binding site of Gram-positive organisms are found upstream of the synthase. The predicted amino-acid sequence reveals the presence of a 35-residue signal peptide. The sequence has some similarity to bacterial peptide-binding proteins.
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Affiliation(s)
- M Lansing
- Institut für Physiologische Chemie und Pathobiochemie, Münster, Federal Republic of Germany
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18
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Affiliation(s)
- F Conrad
- Institut für Allgemeine Mikrobiologie, Christian-Albrechts-Universität, Kiel, Germany
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19
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Dorsch M, Stackebrandt E. Some modifications in the procedure of direct sequencing of PCR amplified 16S rDNA. J Microbiol Methods 1992. [DOI: 10.1016/0167-7012(92)90017-x] [Citation(s) in RCA: 90] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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