Full Text Journal Articles by
Author Alexander Reshetnikov

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Symposium report: emerging threats for human health - impact of socioeconomic and climate change on zooanthroponosis in the Republic of Sakha (Yakutia), Russia.

Irene Huber, Katerina Potapova, Elena Ammosova, Wolfgang Beyer, Sergey Blagodatskiy, Roman Desyatkin, Ludwig E Hoelzle, Margarita Ignateva, Ludmila Kokolova, Stefanie Lemke, Mikhail Neustroev, Ayan Nyukkanov, Galina Protodyakonova, Alexander Reshetnikov, Thomas Romig, Vyacheslav Shadrin, Izabella Samoilova, Sergey Semenov, Konstantin Stepanov, Nadezhda Tarabukina, Liliia Vinokurova, Raisa Zakharova, Konstantin Nifontov,

Population growth, socio-cultural and economic changes as well as technological progress have an immediate impact on the environment and human health in particular. Our steadily rising needs of resources increase the pressure on the environment and narrow down untainted habitats for plants and wild animals. Balance and resilience of ecosystems ... Read more >>

Int J Circumpolar Health (International journal of circumpolar health)
[2020, 79(1):1715698]

Cited: 0 times

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ATP- and Polyphosphate-Dependent Glucokinases from Aerobic Methanotrophs.

Alexander S Reshetnikov, Natalia P Solntseva, Olga N Rozova, Ildar I Mustakhimov, Yuri A Trotsenko, Valentina N Khmelenina,

The genes encoding adenosine triphosphate (ATP)- and polyphosphate (polyP)-dependent glucokinases (Glk) were identified in the aerobic obligate methanotroph Methylomonas sp. 12. The recombinant proteins were obtained by the heterologous expression of the glk genes in Esherichia coli. ATP-Glk behaved as a multimeric protein consisting of di-, tri-, tetra-, penta- and ... Read more >>

Microorganisms (Microorganisms)
[2019, 7(2):]

Cited: 1 time

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The genes and enzymes of sucrose metabolism in moderately thermophilic methanotroph Methylocaldum szegediense O12.

Sergey Y But, Natalia P Solntseva, Svetlana V Egorova, Ildar I Mustakhimov, Valentina N Khmelenina, Alexander Reshetnikov, Yuri A Trotsenko,

Four enzymes involved in sucrose metabolism: sucrose phosphate synthase (Sps), sucrose phosphate phosphatase (Spp), sucrose synthase (Sus) and fructokinase (FruK), were obtained as his-tagged proteins from the moderately thermophilic methanotroph Methylocaldum szegediense O12. Sps, Spp, FruK and Sus demonstrated biochemical properties similar to those of other bacterial counterparts, but the ... Read more >>

Extremophiles (Extremophiles : life under extreme conditions)
[2018, 22(3):433-445]

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The properties and potential metabolic role of glucokinase in halotolerant obligate methanotroph Methylomicrobium alcaliphilum 20Z.

Ildar I Mustakhimov, Olga N Rozova, Natalia P Solntseva, Valentina N Khmelenina, Alexander S Reshetnikov, Yuri A Trotsenko,

Aerobic bacteria utilizing methane as the carbon and energy source do not use sugars as growth substrates but possess the gene coding for glucokinase (Glk), an enzyme converting glucose into glucose 6-phosphate. Here we demonstrate the functionality and properties of Glk from an obligate methanotroph Methylomicrobium alcaliphilum 20Z. The recombinant ... Read more >>

Antonie Van Leeuwenhoek (Antonie van Leeuwenhoek)
[2017, 110(3):375-386]

Cited: 2 times

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Draft Genome Sequence of the Moderately Halophilic Methanotroph Methylohalobius crimeensis Strain 10Ki.

Christine E Sharp, Angela V Smirnova, Marina G Kalyuzhnaya, Françoise Bringel, Hisako Hirayama, Mike S M Jetten, Valentina N Khmelenina, Martin G Klotz, Claudia Knief, Nikos Kyrpides, Huub J M Op den Camp, Alexander S Reshetnikov, Yasuyoshi Sakai, Nicole Shapiro, Yuri A Trotsenko, Stéphane Vuilleumier, Tanja Woyke, Peter F Dunfield,

Methylohalobius crimeensis strain 10Ki is a moderately halophilic aerobic methanotroph isolated from a hypersaline lake in the Crimean Peninsula, Ukraine. This organism has the highest salt tolerance of any cultured methanotroph. Here, we present a draft genome sequence of this bacterium. ... Read more >>

Genome Announc (Genome announcements)
[2015, 3(3):]

Cited: 2 times

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Sucrose metabolism in halotolerant methanotroph Methylomicrobium alcaliphilum 20Z.

Sergey Y But, Valentina N Khmelenina, Alexander S Reshetnikov, Ildar I Mustakhimov, Marina G Kalyuzhnaya, Yuri A Trotsenko,

Sucrose accumulation has been observed in some methylotrophic bacteria utilizing methane, methanol, or methylated amines as a carbon and energy source. In this work, we have investigated the biochemical pathways for sucrose metabolism in the model halotolerant methanotroph Methylomicrobium alcaliphilum 20Z. The genes encoding sucrose-phosphate synthase (Sps), sucrose-phosphate phosphatase (Spp), ... Read more >>

Arch. Microbiol. (Archives of microbiology)
[2015, 197(3):471-480]

Cited: 8 times

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Bifunctional sucrose phosphate synthase/phosphatase is involved in the sucrose biosynthesis by Methylobacillus flagellatus KT.

Sergey Y But, Valentina N Khmelenina, Alexander S Reshetnikov, Yuri A Trotsenko,

The aerobic obligate methylotroph Methylobacillus flagellatus KT was shown to synthesize sucrose in the presence of 0.5-2% NaCl in the growth medium. In the genome of this bacterium, an open reading frame (ORF) encoding a predicted 84-kD polypeptide homologous to the plant and cyanobacterial sucrose phosphate synthases (SPSs) was found. ... Read more >>

FEMS Microbiol. Lett. (FEMS microbiology letters)
[2013, 347(1):43-51]

Cited: 3 times

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Diversity and phylogeny of the ectoine biosynthesis genes in aerobic, moderately halophilic methylotrophic bacteria.

Alexander S Reshetnikov, Valentina N Khmelenina, Ildar I Mustakhimov, Marina Kalyuzhnaya, Mary Lidstrom, Yuri A Trotsenko,

The genes of ectoine biosynthesis pathway were identified in six species of aerobic, slightly halophilic bacteria utilizing methane, methanol or methylamine. Two types of ectoine gene cluster organization were revealed in the methylotrophs. The gene cluster ectABC coding for diaminobutyric acid (DABA) acetyltransferase (EctA), DABA aminotransferase (EctB) and ectoine synthase ... Read more >>

Extremophiles (Extremophiles : life under extreme conditions)
[2011, 15(6):653-663]

Cited: 16 times

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Genes and enzymes of ectoine biosynthesis in halotolerant methanotrophs.

Alexander S Reshetnikov, Valentina N Khmelenina, Ildar I Mustakhimov, Yuri A Trotsenko,

Ectoine (1,4,5,6-tetrahydro-2-methyl-4-pyrimidine carboxylic acid) is a widely distributed compatible solute accumulated by halophilic and halotolerant microorganisms to prevent osmotic stress in highly saline environments. Ectoine as a highly water keeping compound stabilizing biomolecules and whole cells can be used in scientific work, cosmetics, and medicine. Detailed understanding of the organization/regulation ... Read more >>

Meth. Enzymol. (Methods in enzymology)
[2011, 495:15-30]

Cited: 11 times

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Identification and characterization of EctR1, a new transcriptional regulator of the ectoine biosynthesis genes in the halotolerant methanotroph Methylomicrobium alcaliphilum 20Z.

Ildar I Mustakhimov, Alexander S Reshetnikov, Anatoly S Glukhov, Valentina N Khmelenina, Marina G Kalyuzhnaya, Yuri A Trotsenko,

Genes encoding key enzymes of the ectoine biosynthesis pathway in the halotolerant obligate methanotroph Methylomicrobium alcaliphilum 20Z have been shown to be organized into an ectABC-ask operon. Transcription of the ect operon is initiated from two promoters, ectAp(1) and ectAp(2) (ectAp(1)p(2)), similar to the sigma(70)-dependent promoters of Escherichia coli. Upstream ... Read more >>

J. Bacteriol. (Journal of bacteriology)
[2010, 192(2):410-417]

Cited: 20 times

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Characterization of the pyrophosphate-dependent 6-phosphofructokinase from Methylococcus capsulatus Bath.

Alexander S Reshetnikov, Olga N Rozova, Valentina N Khmelenina, Ildar I Mustakhimov, Alexander P Beschastny, J Colin Murrell, Yuri A Trotsenko,

An active pyrophosphate-dependent 6-phosphofructokinase (PPi-PFK) from the thermotolerant methanotroph Methylococcus capsulatus Bath, containing a six-residue polyhistidine tag, was characterized. The enzyme was homodimeric (2 x 45 kDa), nonallosteric and most active at pH 7.0. PPi-PFK catalyzed reactions of PPi-dependent phosphorylation of fructose-6-phosphate (F-6-P) (K(m) 2.27 mM and V(max) 7.6 U ... Read more >>

FEMS Microbiol. Lett. (FEMS microbiology letters)
[2008, 288(2):202-210]

Cited: 28 times

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Characterization of the recombinant diaminobutyric acid acetyltransferase from Methylophaga thalassica and Methylophaga alcalica.

Ildar I Mustakhimov, Olga N Rozova, Alexander S Reshetnikov, Valentina N Khmelenina, J Colin Murrell, Yuri A Trotsenko,

Diaminobutyric acid acetyltransferase (EctA) catalyzes the acetylation of diaminobutyric acid to gamma-N-acetyl-alpha,gamma-diaminobutyrate with acetyl coenzyme A. This is the second reaction in the ectoine biosynthetic pathway. The recombinant EctA proteins were purified from two moderately halophilic methylotrophic bacteria: Methylophaga thalassica ATCC 33146T and Methylophaga alcalica ATCC 35842T. EctA found in ... Read more >>

FEMS Microbiol. Lett. (FEMS microbiology letters)
[2008, 283(1):91-96]

Cited: 3 times

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Characterization of the ectoine biosynthesis genes of haloalkalotolerant obligate methanotroph "Methylomicrobium alcaliphilum 20Z".

Alexander S Reshetnikov, Valentina N Khmelenina, Yuri A Trotsenko,

The genes involved in biosynthesis of the major compatible solute ectoine (1,4,5,6-tetrahydro-2-methylpyrimidine carboxylic acid) in halotolerant obligate methanotroph "Methylomicrobium alcaliphilum 20Z" were studied. The complete nucleotide sequences of the structural genes encoding L: -aspartokinase (Ask), L-2,4-diaminobutyric acid transaminase (EctB), L-2,4-diaminobutyric acid acetyltransferase (EctA), and L-ectoine synthase (EctC) were defined and ... Read more >>

Arch. Microbiol. (Archives of microbiology)
[2006, 184(5):286-297]

Cited: 45 times

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