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E V Shcherbakova

Publications and source records attributed to E V Shcherbakova.

9 recordsLinked to original sources
PubMed1988

[Molecular genetic study of the changes in the incompatibility and regulation of the transfer of the F-like pAP18-1 plasmid induced by nitrosoguanidine and the Tn5 and Tn9 transposons].

Relation between induced mutations of plasmid pAP18-1 (Tc, Col) and alterations in it's restriction map was studied. Nitrosoguanidine induced mutations of transfer regulation system and incompatibility of this plasmid related with alteration in the situation of recognition sites for restrictases EcoR1 and Sal1 in map positions 42.2-4.3 and 12.9-17.9 MD. Insertions of transposons Tn5 and Tn9 into the plasmid DNA resulted in a decrease of incompatibility level.

Base Sequence↗
PubMed1985

[Restriction map of the genetic transfer factor pAP42].

Based on the calculated molecular weights of EcoR1, HindIII, and SalI fragments of the genetic transfer factor pAP42 the restriction map of this plasmid was designed. Sites recognizing restrictases are mostly located in the plasmid fragment with a molecular weight of 5.7 MD.

Attachment Sites, Microbiological↗
PubMed1985

[Restriction mapping of genetic transfer factor pAP39].

A model of calculation of molecular weights of fragments EcoRI, Hind III and PvuI is formulated. A restriction site map of factor pAP39 is constructed automatically. Sites to EcoRI and PvuI are distributed in the segment with molecular weight 9.1 MD.

Chromosome Mapping↗
PubMedDate not supplied

[Distribution of HLA DQA1, LDLR, GYPA, HBGG, D7S8, and GC locus alleles in the population of Russia].

The distribution of chromosome locus alleles HLA DQA1, LDLR, GYPA, HBGG, D7S8, and GC of PolyMarker molecular genetic individualizing system was studied for the first time in a representative "mean statistical" sampling of Russian population. Typing of these locuses was carried out in 391 donors (no relatives) from 63 regions of the Russian Federation. The incidence of genotypes of all 6 locuses corresponded to the expected values, estimated on the basis of Hardy-Weinberg equilibrium hypothesis. This allows us to use the frequency characteristics of HLA DQA1 locus and the PolyMarker locuses determined in our study as the reference parameters for standard probability estimations in DNA identification. The frequencies of PolyMarker locuses alleles in the Russian sampling (in comparison with other ethnic groups) coincided best of all for allele frequencies in Europeoids living in the USA. For expert evaluation of the efficiency of using these locuses as molecular genetic markers with identification purposes, the discrimination potential was estimated separately for each locus and combinations thereof. HLA DQA1 locus was the most informative of the studied 6 locuses. The main population characteristics of this locus (probability of accidental coincidence, potential of discrimination--PD, polymorphism coefficient--PIC, exclusion potential--Pe, and mean value of parentage index--PI) were estimated for the population of Russia. The frequency distribution of alleles of the studied panel of locuses in the mean statistical Russian population obtained in our study can be used in molecular genetic personality identification and in anthropological studies.

Alleles↗
PubMedDate not supplied

[Variable tandem repeat VcA of Vibrio cholerae].

Computer analysis revealed seven potential variable-number tandem-repeat (VNTR) loci in the Vibrio cholerae genome. Specific primers were designed to amplify locus VcA located on chromosome 2 and containing a TGCTGT repeat. The locus was found in all tested strains from a V. cholerae strain collection, the repeat number varying 3 to 23. In total, 14 VcA alleles were observed. The VcA locus was proposed as a marker for the molecular typing of V. cholerae strains.

Algorithms↗
PubMedDate not supplied

[Distribution of D1S80 alleles in a random sample of the population of the Russian Federation].

The distribution of alleles of chromosomal locus D1S80 was studied within a random selection of population of the Russian Federation. Typing was made for 255 persons who were not blood relatives and who lived in 56 Russia's regions. A correlation was found between the observed frequencies of genotypes and those theoretically expected and estimated on the basis of the hypothesis of Hardy-Weinberg equilibrium. The main population characteristics of locus D1S80, i.e. probability of an incidental coincidence of a genotype, discriminating potential, polymorphism factor, potential excluding cases of incorrectly named parents and mean value of paternity index, were estimated to evaluate the efficiency of the locus as a molecular-genetic marker in solving the identification tasks applicable to Russia's population. The obtained descriptive data on the distribution of alleles of the studied locus in Russia's population can be used to determine the needed estimated parameters in interpreting the results of forensic molecular-genetic identification examinations.

Alleles↗
PubMedDate not supplied

[Practical use of the molecular-genetic technologies in solving the tasks of forensic medical identification of remains in emergencies with huge human death toll].

Previously, we have developed different variants, for the expert use, of information technologies, i.e. of computer automated analytical systems, to ensure an effective analysis of huge bulwarks of molecular-genetic expert findings. The results obtained in the above research significantly advanced the possibilities of expert evaluation related with personality identification under the conditions of a big death toll; they also cleaned the ground for the introduction of such methodological approaches in the practice of investigations of emergency accidents involving huge death tolls. Described within the present case study is a practical experience of forensic medical identification of unrecognized remains in air crashes with huge human death tolls implemented through computer-assisted complex molecular-genetic tests on the basis of indirect DNA identification involving the establishment of blood relationship.

Accidents, Aviation↗
PubMedDate not supplied

[An algorithm of computerized processing of molecular-genetic data for personality identification based on the outcome of events involving numerous victims].

Computerized systems of data processing are a high-efficiency tool for the storage and processing of big volumes of molecular genetic data as well as for the forensic medical identification of personality in events involving enormous unidentified bodies coming from zones of calamity or natural disaster. Described in the paper is a sequence of actions undertaken by the expert when the DNAdacto and mDNAbase soft tools are in use. The algorithm of computer-based expert analysis of typing of chromosome and mitochondrial DNA was tested at the 124th Central laboratory of medical-criminal identification of Russia's defense ministry; it was proven to be highly effective for identification made in events with numerous unidentified bodies.

Algorithms↗