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Zorina OA, Kulakov AA, Boriskina OA, Rebrikov DV. Relationship between the Pathogenic Representatives of Periodontal Pockets Microbiocenosis in Patients with Periodontitis with Varying Degrees of Severity. Acta Naturae 2011. [DOI: 10.32607/20758251-2011-3-2-99-102] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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27
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Safonova AV, Petrin AN, Arutyunov SD, Tsarev VN, Akulenko LA, Zorina AO, Rebrikov DV, Rubanovich AV, Borinskaya SA, Yankovsky NK. Association of Cytokine Gene Alleles with the Inflammation of Human Periodontal Tissue. Acta Naturae 2011. [DOI: 10.32607/20758251-2011-3-1-116-122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Zorina OA, Kulakov AA, Boriskina OA, Rebrikov DV. [PCR "real time" to analyze the quantitative and qualitative relations microbiota of periodontal pockets]. STOMATOLOGIIA 2011; 90:31-33. [PMID: 21716234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The introduction of a broad medical practice PCR "real time" is just beginning and dentistry is no exception. Modern molecular genetic methods provide numerous opportunities for diagnosis, assessment and prediction in patients with inflammatory periodontal diseases. Early and accurate diagnosis can allow in the future reduce the incidence of periodontitis and the progression of its course.
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Zorina OA, Kulakov AA, Rebrikov DV. [Quantitative detection of periodontopatogenic microflora in periodontosis and healthy control]. STOMATOLOGIIA 2011; 90:40-42. [PMID: 21716237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Mouth human populated set of microorganisms that are in dynamic equilibrium and forming microbiocaenosis. In a situation where this balance is disturbed, there is a "activation" of pathogens, including those that lead to the development of inflammatory periodontal diseases. Quantifying the relation parodontopatogenov in this material may be an important diagnostic tool, but data on the profile of individual microbiota subbiotopov mouth so far very little. In this study, we quantified the six pathogenic representatives of the periodontal pocket microbiota in health and periodontitis. Found that when disease development relationship pathogenic representatives of periodontal pocket microbiota varies considerably.
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Zvyagin IV, Dorodnykh VY, Mamedov IZ, Staroverov DB, Bochkova AG, Rebrikov DV, Lebedev YB. Association of ERAP1 Allelic Variants with Risk of Ankylosing Spondylitis. Acta Naturae 2010. [DOI: 10.32607/20758251-2010-2-3-72-77] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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31
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Vasilyev EV, Trofimov DY, Tonevitsky AG, Ilinsky VV, Korostin DO, Rebrikov DV. Torque Teno Virus (TTV) distribution in healthy Russian population. Virol J 2009; 6:134. [PMID: 19735552 PMCID: PMC2745379 DOI: 10.1186/1743-422x-6-134] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2009] [Accepted: 09/07/2009] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Torque teno virus (TTV) is a circular, single-stranded DNA virus that chronically infects healthy individuals of all ages worldwide. There is a lot of data on the prevalence and genetic heterogeneity of TTV in healthy populations and in patients with various diseases now available. However, little is known about TTV load among healthy human population. In this study we analyzed TTV load in the group of 512 Russian elite athletes, who are supposed to be, by some standards, the healthiest part of the human population. RESULTS The prevalence rate of TTV among the Russian Olympic Reserve members was 94% (for test sensitivity about 1000 genome equivalents per 1 ml of blood). Quantities varied from 103 (which corresponded to detection limit) to 1010 copies per 1 ml of blood, with median at 2.7 x 106 copies. CONCLUSION About 94% of healthy individuals in Russian population have more than 1000 TTV genome copies per 1 ml of blood. This result exceeds the previously published data, and can be explained by either more sensitive PCR test system or by higher TTV distribution in Russian population or both. TTV viral load neither depends on gender, nor age.
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Turchaninova MA, Rebrikov DV. [Profile of RNA cytokines in blood plasma under conditions of normal physiological state of human body]. MOLEKULIARNAIA GENETIKA, MIKROBIOLOGIIA I VIRUSOLOGIIA 2009:22-24. [PMID: 19517806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The level of representation of extracellular RNA 14 cytokines in blood plasma in a group of apparently healthy subjects was analyzed. The level of representation of the transcripts of these cytokines in extracellular medium is characterized by specific profile different from the profile of expression of the genes in blood cells.
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Komarov AL, Shakhmatova OO, Stambol'skiĭ DV, Rebrikov DV, Kofiadi IA, Sirotkina OV, Panchenko EP. [Risk factors of thrombotic complications and prognosis of patients with chronic form of ischemic heart disease]. KARDIOLOGIIA 2009; 49:4-10. [PMID: 20001975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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Trofimov DY, Rebrikov DV, Samatov GA, Semenov PA, Baluev AB, Goncharova EV, Alexeev LP, Khaitov RM. The delta-TF method for real-time PCR data standardization. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2008; 419:118-21. [PMID: 18536278 DOI: 10.1134/s0012496608020142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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35
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Rebrikov DV. Identification of differential genes by suppression subtractive hybridization: I. Preparation of subtracted cDNA or genomic DNA library. Cold Spring Harb Protoc 2008; 2008:pdb.prot4855. [PMID: 21356860 DOI: 10.1101/pdb.prot4855] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
INTRODUCTIONSuppression subtractive hybridization (SSH) is one of the most powerful and popular methods for generating subtracted cDNA or genomic DNA libraries. This technique can be used to compare two mRNA populations and obtain cDNAs representing genes that are either overexpressed or exclusively expressed in one population as compared to another. It can also be used for comparison of genomic DNA populations. This protocol describes the preparation of a subtracted cDNA or genomic DNA library, and includes methods for cDNA synthesis, tester and driver DNA digestion, and adapter ligation.
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Rebrikov DV. Identification of Differential Genes by Suppression Subtractive Hybridization: V. PCR-Based DNA Dot Blot. Cold Spring Harb Protoc 2008; 2008:pdb.prot4859. [PMID: 21356864 DOI: 10.1101/pdb.prot4859] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
INTRODUCTIONSuppression subtractive hybridization (SSH) is one of the most powerful and popular methods for generating subtracted cDNA or genomic DNA libraries. This technique can be used to compare two mRNA populations and obtain cDNAs representing genes that are either overexpressed or exclusively expressed in one population as compared to another. It can also be used for comparison of genomic DNA populations. This protocol describes a method for the use of PCR-based DNA dot blots in the differential screening of arrayed subtracted DNA clones. For high-throughput screening, a 96-well or 384-well format PCR from one of several thermal cycler manufacturers is recommended. Alternatively, single tubes can be used.
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37
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Rebrikov DV. Identification of Differential Genes by Suppression Subtractive Hybridization: IV. Mirror Orientation Selection (MOS). Cold Spring Harb Protoc 2008; 2008:pdb.prot4858. [PMID: 21356863 DOI: 10.1101/pdb.prot4858] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
INTRODUCTIONSuppression subtractive hybridization (SSH) is one of the most powerful and popular methods for generating subtracted cDNA or genomic DNA libraries. This technique can be used to compare two mRNA populations and obtain cDNAs representing genes that are either overexpressed or exclusively expressed in one population as compared to another. It can also be used for comparison of genomic DNA populations. The major drawback of SSH is the presence of background clones that represent nondifferentially expressed DNA species in the subtracted libraries. In some cases, the number of background clones may considerably exceed the number of target clones. This protocol describes mirror orientation selection (MOS)--a simple procedure that substantially decreases the number of background clones in libraries generated by SSH. The MOS technique is based on the rationale that after PCR amplification, during SSH, background molecules will be present in one orientation only, relative to the adapter sequences. Genuine SSH clones will be present in both sequence orientations.
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38
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Rebrikov DV. Identification of Differential Genes by Suppression Subtractive Hybridization: VI. Differential Hybridization with Tester and Driver DNA Probes. Cold Spring Harb Protoc 2008; 2008:pdb.prot4860. [PMID: 21356865 DOI: 10.1101/pdb.prot4860] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
INTRODUCTIONSuppression subtractive hybridization (SSH) is one of the most powerful and popular methods for generating subtracted cDNA or genomic DNA libraries. This technique can be used to compare two mRNA populations and obtain cDNAs representing genes that are either overexpressed or exclusively expressed in one population as compared to another. It can also be used for comparison of genomic DNA populations. This protocol describes a method for screening a subtracted cDNA library by differential hybridization using (1) a tester-specific subtracted probe (forward-subtracted probe), (2) a driver-specific subtracted probe (reverse-subtracted probe), (3) a cDNA probe synthesized directly from tester mRNA (or tester genomic DNA), and (4) a cDNA probe synthesized directly from driver mRNA (or driver genomic DNA).
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Rebrikov DV. Identification of differential genes by suppression subtractive hybridization: an overview. Cold Spring Harb Protoc 2008; 2008:pdb.top21. [PMID: 21356875 DOI: 10.1101/pdb.top21] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
INTRODUCTIONSuppression subtractive hybridization (SSH) is one of the most powerful and popular methods for generating subtracted cDNA or genomic DNA libraries. This technique can be used to compare two mRNA populations and obtain cDNAs representing genes that are either overexpressed or exclusively expressed in one population as compared to another. It can also be used for comparison of genomic DNA populations. We have used SSH in studies of regeneration and development on various types of model organisms (including freshwater planaria regeneration, Xenopus laevis development, and mammalian brain cortex development). We also use SSH for the analysis of strain-specific genes in bacteria with different characteristics. During these studies, a large number of differentially regulated and differentially presented genes have been identified, including transcriptional regulation factors and restriction modification enzymes. This article describes the SSH method and considerations for its use.
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Rebrikov DV. Identification of Differential Genes by Suppression Subtractive Hybridization: II. Subtractive Hybridization. Cold Spring Harb Protoc 2008; 2008:pdb.prot4856. [PMID: 21356861 DOI: 10.1101/pdb.prot4856] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
INTRODUCTIONSuppression subtractive hybridization (SSH) is one of the most powerful and popular methods for generating subtracted cDNA or genomic DNA libraries. This technique can be used to compare two mRNA populations and obtain cDNAs representing genes that are either overexpressed or exclusively expressed in one population as compared to another. It can also be used for comparison of genomic DNA populations. This protocol describes a method for subtractive hybridization using adapter-ligated tester and RsaI-digested driver DNA samples.
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Rebrikov DV. Identification of Differential Genes by Suppression Subtractive Hybridization: III. PCR Amplification of Differentially Presented DNAs. Cold Spring Harb Protoc 2008; 2008:pdb.prot4857. [PMID: 21356862 DOI: 10.1101/pdb.prot4857] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
INTRODUCTIONSuppression subtractive hybridization (SSH) is one of the most powerful and popular methods for generating subtracted cDNA or genomic DNA libraries. This technique can be used to compare two mRNA populations and obtain cDNAs representing genes that are either overexpressed or exclusively expressed in one population as compared to another. It can also be used for comparison of genomic DNA populations. In this protocol, differentially presented DNAs are selectively amplified using PCR. It is strongly recommended that subtractions be performed in both directions for each tester/driver DNA pair. Forward subtraction is designed to enrich for differentially presented molecules present in the tester but not in the driver; reverse subtraction is designed to enrich for differentially presented sequences present in the driver but not in the tester. Therefore, each experiment should have at least four reactions: (1) subtracted tester DNAs, (2) unsubtracted tester control, (3) reverse-subtracted tester DNAs, and (4) unsubtracted control for the reverse subtraction.
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Stakhov VL, Gubin SV, Maksimovich SV, Rebrikov DV, Savilova AM, Kochkina GA, Ozerskaia SM, Ivanushkina NE, Vorob'eva EA. [Microbial communities of ancient seeds derived from permanently frozen Pleistocene deposits]. MIKROBIOLOGIIA 2008; 77:396-403. [PMID: 18683658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Microbial communities from the surface of ancient seeds of higher plants and embedding frozen material dated to the late Pleistocene (formed about 30 thousand years ago) were studied by various methods: scanning electron microscopy, epifluorescence microscopy, and inoculation of nutrient media, followed by identification of isolated cultures. Both prokaryotic and eukaryotic microorganisms were found on the surface of ancient seeds. The total quantity of bacterial cells determined by direct counting and dilution plating (CFU) for the samples of ancient seeds exceeded the value in the embedding frozen material by one to two orders of magnitude. This pattern was not maintained for mycelial fungi; their quantity in the embedding material was also rather high. A significant difference was revealed between the microbial communities of ancient seeds and embedding frozen material. These findings suggest that ancient plant seeds are a particular ecological niche for microorganisms existing in permafrost and require individual detailed study.
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Anisimova VE, Shcheglov AS, Bogdanova EA, Rebrikov DV, Nekrasov AN, Barsova EV, Shagin DA, Lukyanov SA. Is crab duplex-specific nuclease a member of the Serratia family of non-specific nucleases? Gene 2008; 418:41-8. [PMID: 18514436 DOI: 10.1016/j.gene.2008.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2008] [Revised: 03/03/2008] [Accepted: 04/06/2008] [Indexed: 11/24/2022]
Abstract
Kamchatka crab duplex-specific nuclease (Par_DSN) has been classified as a member of the family of DNA/RNA non-specific beta-beta-alpha metal finger (bba-Me-finger) nucleases, the archetype of which is the nuclease from Serratia marcescens. Although the enzyme under investigation seems to belong to the family of S. marcescens nucleases, Par_DSN exhibits a marked preference for double-stranded DNA as a substrate and this property is unusual for other members of this family. We have searched other Arthropod species and identified a number of novel Par_DSN homologs. A phylogenetic analysis demonstrates that the Par_DSN-like enzymes constitute a separate branch in the evolutionary tree of bba-Me-finger nucleases. Combining sequence analysis and site-directed mutagenesis, we found that Par_DSN and its homologs possess the nuclease domain that is slightly longer than that of classic Serratia relatives. The active site composition of Par_DSN is similar but not identical to that of classic Serratia nucleases. Based on these findings, we proposed a new classification of Par_DSN-like nucleases.
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Kofiadi IA, Rebrikov DV, Trofimov DY, Alexeev LP, Khaitov RM. Allelic distribution of the CCR5, CCR2, and SDF1 gene polymorphisms associated with HIV-1/AIDS resistance in Russian populations. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2007; 415:320-323. [PMID: 17929678 DOI: 10.1134/s0012496607040217] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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45
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Rebrikov DV, Rebrikov DN, Stepanova EV, Koroleva OV, Budarina ZI, Zakharova MV, Iurkova TV, Solonin AS, Belova OV, Pozhidaeva ZA, Leont'evskiĭ AA. [Laccase of the lignolytic fungus Trametes hirsuta: purification and characterization of the enzyme, and cloning and primary structure of the gene]. PRIKLADNAIA BIOKHIMIIA I MIKROBIOLOGIIA 2006; 42:645-53. [PMID: 17168293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The main physicochemical characteristics of the major isoform of the laccase secreted by the fungu, Trametes hirsuta 072 were studied. The enzyme belongs to the group of high redox potential laccases (E(T1) = 790 +/- 5), and it oxidizes with high efficiency various substrates of phenolic nature. The gene of this isoform was cloned, and its nucleotide sequence was determined. The length of the complete gene is 2134 bp. It comprises 11 exons and 10 introns. Analysis of the amino acid sequence of T. hirsuta 072 laccase demonstrated a high homology (to 96.9%) to the other laccases secreted by fungi of the genus Trametes.
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Borinskaia SA, Rebrikov DV, Nefedova VV, Kofiadi IA, Sokolova MV, Kolchina EV, Kulikova EA, Chernyshov VN, Kutsev SI, Polonikov AV, Ivanov VP, Kozlov AI, Iankovskiĭ NK. [Molecular diagnosis and frequencies of primary hypolactasia in populations of RUSSIA and neighboring countries]. Mol Biol (Mosk) 2006; 40:1031-6. [PMID: 17209431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The digestion of the milk sugar (lactose) is observed every normal child but not in every adult. The decreased lactase synthesis in some adults results in problems with digestion of the whole milk (primary hypolactasy). An association of lactase activity in adults with carrying of the allele T within the polymorphism C/T-13910 located upstream of the lactase gene and 100% association of hypolactasy with the genotype C/C has recently been shown for a Finnish sample. In the present work we determined the LCT* C/T_13910 genotypes and allele frequencies in populations from Russia. The genotype C/C frequencies varied from 36.6% for Russians to 88.2% for Chukchi and were close to the published medical and epidemiological data on hypolactasy frequencies in respective populations. Genotyping was performed by three different methods to identify the optimal one. Our results have shown that the studied locus is the key determinant for the primary hypolactasy development in various human populations. Consequently, the DNA diagnostics of the C/C genotype carrying is a promising predictive test to detect the primary hypolactasy long before its clinical development. Practical application of this type of diagnostics would be a step towards the individual-oriented medicine.
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Rebrikov DV, Trofimov DI. [Real-time PCR: approaches to data analysis (a review)]. PRIKLADNAIA BIOKHIMIIA I MIKROBIOLOGIIA 2006; 42:520-8. [PMID: 17066950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The registration of the accumulation of polymerase chain reaction (PCR) products in the course of amplification (real-time PCR) requires specific equipment, i.e., detecting amplifiers capable of recording the level of fluorescence in the reaction tube during amplicon formation. By the time the reaction is completed, researchers obtain DNA accumulation graphs. The review discusses the most promising algorithms of analysis of real-time PCR curves and possible errors, whether caused by the software used or the operators' mistakes. The data included will assist researchers in understanding the features of the method to obtain more reliable results.
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Anisimova VE, Rebrikov DV, Zhulidov PA, Staroverov DB, Lukyanov SA, Shcheglov AS. Renaturation, activation, and practical use of recombinant duplex-specific nuclease from Kamchatka crab. BIOCHEMISTRY (MOSCOW) 2006; 71:513-9. [PMID: 16732729 DOI: 10.1134/s0006297906050075] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We overexpressed duplex-specific nuclease (DSN) from Kamchatka crab in Escherichia coli cells and developed procedures for purification, renaturation, and activation of this protein. We demonstrated identity of the properties of the native and recombinant DSN. We also successfully applied the recombinant DSN for full-length cDNA library normalization.
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Abramov DD, Trofimov DI, Rebrikov DV. [Accuracy of a real-time polymerase-chain-reaction assay for a quantitative estimation of genetically modified sources in food products]. PRIKLADNAIA BIOKHIMIIA I MIKROBIOLOGIIA 2006; 42:485-8. [PMID: 17022461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The accuracy of a real-time polymerase-chain-reaction assay for genetically modified sources in food products was determined using two official test systems (kits) of primers and samples. These kits were recommended by the Federal Center of State Sanitary and Epidemiological Surveillance (Russian Ministry of Health) and the European Commission. We used the following three models of thermocyclers: iCycler iQ (BioRad, United States), Rotor-Gene 3000 (Corbett Research, Australia), and DT-322 (DNA-Technology, Russia). Studies of samples that contained 1% genetically modified sources showed that the error of a quantitative assay for genetically modified sources in food products corresponds to 20-30% and does not depend on the kit type and the thermocycler model used.
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Semenova SA, Rudenskaya GN, Rebrikov DV, Isaev VA. cDNA Cloning, Purification and Properties of Paralithodes camtschatica Metalloprotease. Protein Pept Lett 2006; 13:571-5. [PMID: 16842111 DOI: 10.2174/092986606777145887] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Hepatopancreas of king crab Paralithodes camtschatica produces a metalloprotease, which belongs to the astacin family, as cDNA cloning and sequencing showed. The metalloprotease has been purified chromatographically to apparent homogeneity. The purification factor was 16 and activity recovery was 20%. pH and temperature optimum have been determined. In its properties (molecular weight, pI, metal content) the metalloprotease is close to crayfish astacin. However, analysis of the enzyme sequences revealed differences, which account for differences in substrate specificities and imply a different activation mechanism.
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