LABORATORY OF MICROBIAL GENETICS

      Head: Assoc. Professor Galina Stoyancheva, PhD

Tel.: +359 2 979 31 82

E-mail: galinadinkova@abv.bg

 Prof. Penka Petrova, PhD, DSc

Tel.: +359 2 979 31 79

E-mail: pepipetrova@yahoo.com

Assoc. Professor Dilnora Gouliamova, PhD

Tel.: +359 2 979 31 82

E-mail: dilnorag@gmail.com

Assoc. Professor Maria Gerginova, PhD

Теl.: +359 2 979 31 14

Assoc. Professor Galina Stoyancheva, PhD

Tel.: +359 2 979 31 82

E-mail: galinadinkova@abv.bg

Assist. Prof. Alexander Arsov, PhD

Теl.: +359 2 979 31 79

E-mail: al.arsov@microbio.bas.bg

Assist. Prof. Emanoel Gergov, PhD

Теl.: +359 2 979 31 79

E-mail: emanoelgergov@microbio.bas.bg

Assist. Prof. Katya Litova, PhD

 Теl.: +359 2 979 31 64

E-mail: katya_litova@abv.bg

biologist Nadejda Peneva

Tel.: +359 2 979 31 14
E-mail: peneva_nad@yahoo.com

Ivan Ivanov, PhD student

Тел.: +359 2 979 31 79

E-mail: ivanov.ivnt@gmail.com

The subjects of the study are lactic acid bacteria, streptomycetes, methylotrophic yeasts, ascomycetic and basidiomycetic yeasts and molds. The main approach in the research is the genetic analysis and regulation of genes in microorganisms. Molecular-taxonomic characterization of vaginal lactobacilli and MKB isolated from Bulgarian dairy products is performed. Their probiotic potential is characterized, molecular mechanisms of effectiveness and resistance to industrial stress are studied.

Enhancement of antibiotic productivity and activity of Streptomyces production strains. Cloning and sequencing of genes involved in spectinomycin biosynthesis in Streptomyces flavopersicus.

Construction of yeast strains of Ogataea polymorpha for the expression of heterologous genes.

Molecular, genetic and biochemical analyses of yeasts and molds (Aspergillus, Trametes, Penicillium, Cladosporium, etc.) capable of effectively degrading toxic aromatic and aliphatic compounds. Isolation of DNA sequences to study the biodegradation potential of microbial strains in industrially contaminated waters and soils. The possibility of biodegradation of monoaromatic and polyaromatic substances such as anthracene, naphthalene and phenanthrene from Trichosporon cutaneum strains, Aspergillus fumigatus, Penicillium commune, Alternaria maritima has been proven.

Completed within the last 5 years:

2012-2013 Project of the Thracian University on “Investigating the Effect of Lactobacillus Probiotics on Serum Indicators and Tissue Functions in the Development and Progression of Experimentally Induced Type 2 Diabetes in Rats”.

2014-2015 “In vitro interaction of probiotics with antibiotics and effect on the expression of proteins with antimicrobial activity at mRNA level in chickens” Project of Thracian University.

2012-2015 WBI-Brussels, Belgium -BAN Bi-lateral project with the University of Liege, Belgium on “Molecular analyzes of new approaches to monitoring the microflora of fermented foods”.

2009-2013 New polysaccharide-modifying enzymes optimizing the potential of hydrocolloids for use in food and medicine “PolyModE”, EU FP7, 222628 and DTK 02/09 (2010-2015), NSF.

2013-2014 Isolation and identification of Streptococcus thermophilus strains from artisanal Bulgarian yoghurts. Funded by CHR. HANSEN A/S Denmark, (2014) Project leader: Galina Stoyancheva.

2009 -2013 Novel Polysaccharide Modifying Enzymes to Optimise the Potential of Hydrocolloids for Food and Medical Applications – PolyModeE, Project No 222628 funded by the 7-th Framework Program of ЕU.

Ongoing:

Isolation, identification and characterization of Lactobacillus strains, isolated from artisanal Bulgarian milk products, Contract with Bright Dairy Foods & Co. Ltd, China (2015-2018).

Modern molecular approaches for functional and technological characterization of probiotic features of amylolytic lactic acid bacteria of Bulgarian fermentative products (2015-2017) funded by NSF, Republic of Bulgaria.

Project N 2016/2019 DN 07/7 Study of waste water treatment processes through integrated microbial fuel cells. Funding from the National Science Fund

Petrova P., Velikova P., Popova L., Petrov K. Direct conversion of chicory flour into L(+)-lactic acid by the highly effective inulinase producer Lactobacillus paracasei DSM 23505. Bioresource Technology 186, 329-333, Elsevier, 2015, ISSN: 0960-8524, DOI: 10.1016/j.biortech.2015.03.077

Velikova P., Stoyanov A., Blagoeva G., Popova L., Petrov K., Gotcheva V., Angelov A., Petrova P. Starch utilization routes in lactic acid bacteria: new insight by gene expression assay. Starch-Starke 68, 953-960, Wiley-VCH Verlag GmbH & Co, 2016, ISSN: 1521-379X, DOI: 10.1002/star.201600023

Velikova P., Petrov K., Petrova P. The cell wall anchored β-fructosidases of Lactobacillus paracasei: overproduction, purification, and gene expression control. Process Biochemistry, 52, 53-62, Elsevier, 2017, ISSN: 1359-5113, DOI:10.1016/j.procbio.2016.10.010.

Petrov K., Popova L., Petrova P. High lactic acid and fructose production via Mn2+ mediated conversion of inulin by Lactobacillus paracasei. Applied Microbiology and Biotechnology 101, 4433-4445, Springer Verlag, 2017, ISSN: 0175-7598, DOI: 10.1007/s00253-017-8238-0.

Amylolytic lactic acid bacteria with application in food industry (2012-2015) funded by NSF, Republic of Bulgaria.

Novel Polyaccharide Modifying Enzymes to Optimize the Potential of Hydrocolloids for Food and Medical Applications, (2009-2013), Project №: 222628 funded by the EU within the 7th FP and (2010 – 2015), funded by NSF, Republic of Bulgaria.

Novel and recombinant cyclodextrin-glucanotransferases with industrial application (2010–2012), funded by NSF, Republic of Bulgaria.

Lactic acid production by starch-hydrolyzing bacteria (2010 – 2012); European Social Fund, Grant BG 051PO001-3.3.04/32.

Tropcheva, R., Nikolova, D., Evstatieva, Y., Danova, S. Antifungal activity and identification of Lactobacilli, isolated from traditional dairy product “katak” (2014) Anaerobe, 28, pp. 78-84.  https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902333111&doi=10.1016%2fj.anaerobe.2014.05.010&partnerID=40&md5=373500f56b173012d531833a901dcc2c

Tropcheva, R., Georgieva, R., Paskov, V., Karsheva, M., Danova, S. Sensory properties of Bulgarian yogurts, supplemented with Lactobacilli as probiotic adjuncts (2014) Journal of Texture Studies, 45 (3), pp. 187-194. http://onlinelibrary.wiley.com/doi/10.1111/jtxs.12065/full

Pavlova, I., Milanova, A., Danova, S., Fink-Gremmels, J.Enrofloxacin and Probiotic Lactobacilli Influence PepT1 and LEAP-2 mRNA Expression in Poultry (2016) Probiotics and Antimicrobial Proteins, 8 (4), pp. 215-220. https://www.scopus.com/inward/record.uri?eid=2-s2.0-84981251706&doi=10.1007%2fs12602-016-9225-y&partnerID=40&md5=3f44effb22dd70808f98343387f53215

 Gyurova, A.Y., Doltchinkova, V., Georgieva, R., Danova, S., Stoylov, S.P.Low frequency electric polarizability and zeta-potential of Escherichia coli HB101 (K-12) cells during inactivation with ethanol. Central European Journal of Chemistry, 2013, 11 (5), pp. 801-810.https://www.scopus.com/inward/record.uri?eid=2-s2.0-84875700170&doi=10.2478%2fs11532-013-0220-9&partnerID=40&md5=24be2b2c9fb9115f75c26257cf79f411

Tomova, A., Tomova, I., Vasileva-Tonkova, E., Lazarkevich, I., Stoilova-Disheva, M., Lyutskanova, D., Kambourova, M. Myroides guanonis sp. nov., isolated from prehistoric paintings. Int. J. Syst. Evol. Microbiol. 63: 4266–4270, 2013

Stoyanov, A., Petrova, P., Lyutskanova, D., Lahtchev, K. Structural and functional analysis of PUR2, 5 gene encoding bifunctional enzyme of de novo purine biosynthesis in Ogataea (Hansenula) polymorpha CBS 4732.   Microbiological Research 169: 378-387, 2014.

Stoyancheva G., Stoyanov A.Production of bacteriocins by lactic acid bacteria. Microbiology for a better health and industry, jubilee book 70th anniversary of The Stephan Angeloff Institute of Microbiology, 2017, pp. 61-70, ISBN 978-954-92882-2-3

Stoyancheva G., Marzotto M., Dellaglio F., Torriani S. Bacteriocin production and gene sequencing analysis from vaginal Lactobacillus strains.Archives of microbiology, 196 (9), 2014, 645-653,ISSN: 0302-8933, DOI: 10.1007/s00203-014-1003-1; https://link.springer.com/article/10.1007/s00203-014-1003-1

IvanovaJ., Stoyancheva G., Pouneva I.Lysis of Antarctic algal strains by bacterial pathogen. Antonie van Leeuwenhoek, 105 (6), 2014, 997-1005,ISSN: 0003-6072, DOI: 10.1007/s10482-014-0159-7; https://link.springer.com/article/10.1007/s10482-014-0159-7

Gouliamova DE, Dimitrov RA, Smith MT, Groenewald M, Stoilova-Disheva MM, Guéorguiev BV, Boekhout T. DNA barcoding revealed Nematodospora valgi gen. nov., sp. nov. and Candida cetoniae sp. nov. in the Lodderomyces clade. Fungal Biol. 2016 120(2):179-90. IF: 2.342.  http://www.sciencedirect.com/science/article/pii/S1878614615000987

Crous PW, Wingfield MJ, Richardson DM, Le Roux JJ, Strasberg D, Edwards J, Roets F, Hubka V, Taylor PW, Heykoop M, Martín MP, Moreno G, Sutton DA, Wiederhold NP, Barnes CW, Carlavilla JR, Gené J, Giraldo A, Guarnaccia V, Guarro, J, Hernández-Restrepo M, Kolařík M, Manjón JL, Pascoe IG, Popov ES, Sandoval-Denis M, Woudenberg JH, Acharya K, Alexandrova AV, Alvarado P, Barbosa RN, Baseia IG, Blanchette RA, Boekhout T, Burgess TI, Cano-Lira JF, Čmoková A, Dimitrov RA, Dyakov MY, Dueñas M, Dutta AK, Esteve-Raventós F, Fedosova AG, Fournier J, Gamboa P, Gouliamova DE, Grebenc T, Groenewald M, Hanse B, Hardy GE, Held BW, Jurjević Ž, Kaewgrajang T, Latha KP, Lombard L, Luangsa-Ard JJ, Lysková P, Mallátová N, Manimohan P, Miller AN, Mirabolfathy M, Morozova OV, Obodai M, Oliveira NT, Ordóñez ME, Otto EC, Paloi S, Peterson SW, Phosri C, Roux J, Salazar WA, Sánchez A, Sarria GA, Shin HD, Silva BD, Silva GA, Smith MT, Souza-Motta CM, Stchigel AM, Stoilova-Disheva MM, Sulzbacher MA, Telleria MT, Toapanta C, Traba JM, Valenzuela-Lopez N, Watling R, Groenewald JZ. Fungal Planet description sheets: 400-468. Persoonia. 2016, 36:316-458. ISI IF: 5.7   http://www.ingentaconnect.com/content/nhn/pimj/2016/00000036/00000001/art00011

Crous PW, Wingfield MJ, Guarro J, Hernández-Restrepo M, Sutton DA, Acharya K, Barber PA, Boekhout T, Dimitrov RA, Dueñas M, Dutta AK, Gené J, Gouliamova DE, Groenewald M, Lombard L, Morozova OV, Sarkar J, Smith MT, Stchigel AM, Wiederhold NP, Alexandrova AV, Antelmi I, Armengol J, Barnes I, Cano-Lira JF, Castañeda Ruiz RF, Contu M, Courtecuisse PR, da Silveira AL, Decock CA, de Goes A, Edathodu J, Ercole E, Firmino AC, Fourie A, Fournier J, Furtado EL, Geering AD, Gershenzon J, Giraldo A, Gramaje D, Hammerbacher A, He XL, Haryadi D, Khemmuk W, Kovalenko AE, Krawczynski R, Laich F, Lechat C, Lopes UP, Madrid H, Malysheva EF, Marín-Felix Y, Martín MP, Mostert L, Nigro F, Pereira OL, Picillo B, Pinho DB, Popov ES, Rodas Peláez CA, Rooney-Latham S, Sandoval-Denis M, Shivas RG, Silva V, Stoilova-Disheva MM, Telleria MT, Ullah C, Unsicker SB, van der Merwe NA, Vizzini A, Wagner HG, Wong PT, Wood AR, Groenewald JZ. Fungal Planet description sheets: 320-370. Persoonia. 2015 34:167-266. ISI IF: 5.7  https://www.scienceopen.com/document?vid=3350fba1-feda-488b-9494-7f0d019480f0

 Yurkov AM, Kachalkin AV, Daniel HM, Groenewald M, Libkind D, de Garcia V, Zalar P, Gouliamova DE, Boekhout T, Begerow D. Two yeast species Cystobasidium psychroaquaticum f.a. sp. nov. and Cystobasidium rietchieii f.a. sp. nov.isolated from natural environments, and the transfer of Rhodotorula minuta clade members to the genus Cystobasidium. Antonie Van Leeuwenhoek. 2015, 107(1):173-85. DOI: 10.1007/s10482-014-0315-0  ISI IF: 1.78 https://link.springer.com/article/10.1007%2Fs10482-014-0315-0