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Atanas V. Demirev 4 Articles
Biochemical Characteristization of Propionyl-Coenzyme A Carboxylase Complex of Streptomyces toxytricini
Atanas V. Demirev , Anamika Khanal , Nguyen Phan Kieu Hanh , Kyung Tae Nam , Doo Hyun Nam
J. Microbiol. 2011;49(3):407-412.   Published online June 30, 2011
DOI: https://doi.org/10.1007/s12275-011-1122-1
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AbstractAbstract PDF
Acyl-CoA carboxylases (ACC) are involved in important primary or secondary metabolic pathways such as fatty acid and/or polyketides synthesis. In the 6.2 kb fragment of pccB gene locus of Streptomyces toxytricini producing a pancreatic inhibitor lipstatin, 3 distinct subunit genes of presumable propionyl-CoA carboxylase (PCCase) complex, assumed to be one of ACC responsible for the secondary metabolism, were identified along with gene for a biotin protein ligase (Bpl). The subunits of PCCase complex were α subunit (AccA3), β subunit (PccB), and auxiliary ε subunit (PccE). In order to disclose the involvement of the PCCase complex in secondary metabolism, some biochemical characteristics of each subunit as well as their complex were examined. In the test of substrate specificity of the PCCase complex, it was confirmed that this complex showed much higher conversion of propionyl-CoA rather than acetyl-CoA. It implies the enzyme complex could play a main role in the production of methylmalonyl-CoA from propionyl-CoA, which is a precursor of secondary polyketide biosynthesis.

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  • A Novel β/ε Subunit Combination Expands the Tri-Subunit Acyl-CoA Carboxylase Repertoire in Streptomyces coelicolor
    Shiyu Wu, Xue Yu, Yujie Wu, Xiaomin Niu, Ximing Chen, Tuo Chen, Wei Zhang, Guangxiu Liu, Paul Dyson
    Microorganisms.2026; 14(4): 733.     CrossRef
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    Rachit S. Patil, Siddhant Sharma, Aditya V. Bhaskarwar, Souparnika Nambiar, Niharika A. Bhat, Mani Kanta Koppolu, Hussain Bhukya
    Proteins: Structure, Function, and Bioinformatics.2025; 93(1): 38.     CrossRef
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    Siqiong Xu, Yongchuang Liu, Yujie Ouyang, Jialiang Li, Gongyi Song, Xiaohui Wang, Pan Yang, Yuehui Tang, Lili Li, Jian He, Jiguo Qiu, Cuiwei Chu, Keshi Ma
    International Biodeterioration & Biodegradation.2024; 194: 105879.     CrossRef
  • A Permissive Medium Chain Acyl-CoA Carboxylase Enables the Efficient Biosynthesis of Extender Units for Engineering Polyketide Carbon Scaffolds
    Jun Zhang, Mengmeng Zheng, Jiayan Yan, Zixin Deng, Dongqing Zhu, Xudong Qu
    ACS Catalysis.2021; 11(19): 12179.     CrossRef
  • Increasing the Ascomycin Yield by Relieving the Inhibition of Acetyl/Propionyl-CoA Carboxylase by the Signal Transduction Protein GlnB
    Pan Wang, Xin Wang, Ying Yin, Mingliang He, Wei Tan, Wenting Gao, Jianping Wen
    Frontiers in Microbiology.2021;[Epub]     CrossRef
  • AccR, a TetR Family Transcriptional Repressor, Coordinates Short-Chain Acyl Coenzyme A Homeostasis in Streptomyces avermitilis
    Mengya Lyu, Yaqing Cheng, Xiao Han, Ying Wen, Yuan Song, Jilun Li, Zhi Chen, Andrew J. McBain
    Applied and Environmental Microbiology.2020;[Epub]     CrossRef
  • Current trends and future prospects of lipstatin: a lipase inhibitor and pro-drug for obesity
    Punit Kumar, Kashyap Kumar Dubey
    RSC Advances.2015; 5(106): 86954.     CrossRef
  • Biosynthesis of Phenylnannolone A, a Multidrug Resistance Reversal Agent from the Halotolerant Myxobacterium Nannocystis pusilla B150
    Sarah M. Bouhired, Max Crüsemann, Celso Almeida, Tilmann Weber, Jörn Piel, Till F. Schäberle, Gabriele M. König
    ChemBioChem.2014; 15(5): 757.     CrossRef
  • The TetR Family of Regulators
    Leslie Cuthbertson, Justin R. Nodwell
    Microbiology and Molecular Biology Reviews.2013; 77(3): 440.     CrossRef
  • Structure and function of biotin-dependent carboxylases
    Liang Tong
    Cellular and Molecular Life Sciences.2013; 70(5): 863.     CrossRef
Identification and Characterization of Acetyl-CoA Carboxylase Gene Cluster in Streptomyces toxytricini
Atanas V. Demirev , Ji Seon Lee , Bhishma R. Sedai , Ivan G. Ivanov , Doo Hyun Nam
J. Microbiol. 2009;47(4):473-478.   Published online September 9, 2009
DOI: https://doi.org/10.1007/s12275-009-0135-5
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AbstractAbstract PDF
The gene locus for acetyl-CoA carboxylase (ACC) involved in the primary metabolism was identified from the genomic library of Streptomyces toxytricini which produces a lipase inhibitor lipstatin. The 7.4 kb cloned gene was comprised of 5 ORFs including accD1, accA1, hmgL, fadST1, and stsF. In order to confirm the biochemical characteristics of AccA1, the gene was overexpressed in Escherichia coli cells, and the recombinant protein was purified through Ni2+ affinity chromatography. Because most of the expressed AccA1 was biotinylated by host E. coli BirA in the presence of D-biotin, the non-biotinylated apo-AccA1 was purified after gene induction without D-biotin, followed by exclusion of holo-AccA1 using streptavidin beads. The separated apo-AccA1 was post-translationally biotinylated by S. toxytricini biotin apo-protein ligase (BPL) in a time- and enzyme-dependent manner. This result supports that this gene cluster of S. toxytricini encodes the functional ACC enzyme subunits to be biotinylated.

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  • Experimental investigation of multi-strain bacterial concrete: Self-healing efficiency, strength, and sorptivity under varied curing conditions
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    Journal of Building Engineering.2026; 120: 115552.     CrossRef
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    Daniel Bär, Benjamin Konetschny, Andreas Kulik, Houchao Xu, Davide Paccagnella, Patrick Beller, Nadine Ziemert, Jeroen S. Dickschat, Bertolt Gust
    Microbial Cell Factories.2022;[Epub]     CrossRef
  • Biotechnological and industrial applications of Streptomyces metabolites
    Khushboo, Punit Kumar, Kashyap K. Dubey, Zeba Usmani, Minaxi Sharma, Vijai Kumar Gupta
    Biofuels, Bioproducts and Biorefining.2022; 16(1): 244.     CrossRef
  • Development and Optimization of a High-Throughput Screening Assay for Rapid Evaluation of Lipstatin Production by Streptomyces Strains
    Michal Híreš, Nora Rapavá, Martin Šimkovič, Ľudovít Varečka, Dušan Berkeš, Svetlana Kryštofová
    Current Microbiology.2018; 75(5): 580.     CrossRef
  • De novo biosynthesis of myricetin, kaempferol and quercetin in Streptomyces albus and Streptomyces coelicolor
    Laura Marín, Ignacio Gutiérrez-del-Río, Rodrigo Entrialgo-Cadierno, Claudio J. Villar, Felipe Lombó, Marie-Joelle Virolle
    PLOS ONE.2018; 13(11): e0207278.     CrossRef
  • Regulation and structure of the heteromeric acetyl-CoA carboxylase
    Matthew J. Salie, Jay J. Thelen
    Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids.2016; 1861(9): 1207.     CrossRef
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    Punit Kumar, Kashyap Kumar Dubey
    RSC Advances.2015; 5(106): 86954.     CrossRef
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    Tingheng Zhu, Lingfei Wang, Weixia Wang, Zhongce Hu, Meilan Yu, Kun Wang, Zhifeng Cui
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    Future Microbiology.2014; 9(5): 603.     CrossRef
  • Equilibrium binding and kinetic characterization of putative tetracycline repressor family transcription regulator Fad35R from Mycobacterium tuberculosis
    Sushma Anand, Vijay Singh, Appu Kumar Singh, Monica Mittal, Manish Datt, Bala Subramani, Sangaralingam Kumaran
    The FEBS Journal.2012; 279(17): 3214.     CrossRef
  • Biochemical characteristization of propionyl-coenzyme a carboxylase complex of Streptomyces toxytricini
    Atanas V. Demirev, Anamika Khanal, Nguyen Phan Kieu Hanh, Kyung Tae Nam, Doo Hyun Nam
    The Journal of Microbiology.2011; 49(3): 407.     CrossRef
  • The role of acyl-coenzyme A carboxylase complex in lipstatin biosynthesis of Streptomyces toxytricini
    Atanas V. Demirev, Anamika Khanal, Bhishma R. Sedai, Si Kyu Lim, Min Kyun Na, Doo Hyun Nam
    Applied Microbiology and Biotechnology.2010; 87(3): 1129.     CrossRef
Molecular Cloning of the Phospholipase D Gene from Streptomyces sp. YU100 and Its Expression in Escherichia coli
Ji-Seon Lee , Munkhtsetseg Bat-Ochir , Atanas V. Demirev , Doo Hyun Nam
J. Microbiol. 2009;47(1):116-122.   Published online February 20, 2009
DOI: https://doi.org/10.1007/s12275-008-0161-8
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AbstractAbstract PDF
The gene for phospholipase D (PLD) of Streptomyces sp. YU100 was cloned from λ phage library and heterologously expressed in Escherichia coli. Using an amplified gene fragment based on the consensus sequences of streptomycetes PLDs, λ phage library of Streptomyces sp. YU100 chromosomal DNA was screened. The sequencing result of BamHI-digested 3.8 kb fragment in a positive phage clone revealed the presence of an open reading frame of a full sequence of PLD gene encoding a 540-amino acid protein including 33-amino acid signal peptide. The deduced amino acid sequence showed a high homology with other Streptomyces PLDs, having the highly conserved ‘HKD’ motifs. The PLD gene excluding signal peptide sequence was amplified and subcloned into a pET-32b(+) expression vector in E. coli BL21(DE3). The recombinant PLD was purified by nickel affinity chromatography and compared the enzyme activity with wild-type PLD. The results imply that the recombinant PLD produced by E. coli had the nearly same enzyme activity as PLD from Streptomyces sp. YU100.

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Cloning and Analysis of a Type II Polyketide Synthase Gene Cluster from Streptomyces toxytricini NRRL 15,443
Anna Yoo , Atanas V. Demirev , Ji Seon Lee , Sang Dal Kim , Doo Hyun Nam
J. Microbiol. 2006;44(6):649-654.
DOI: https://doi.org/2462 [pii]
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AbstractAbstract PDF
A standard type II polyketide synthase (PKS) gene cluster was isolated while attempting to clone the biosynthetic gene for lipstatin from Streptomyces toxytricini NRRL 15,443. This result was observed using a Southern blot of a PstI-digested S. toxytricini chromosomal DNA library with a 444 bp amplified probe of a ketosynthase (KS) gene fragment. Four open reading frames [thioesterase (TE), β-ketoacyl systhase (KAS), chain length factor (CLF), and acyl carrier protein (ACP)], were identified through the nucleotide sequence determination and analysis of a 4.5 kb cloned DNA fragment. In order to confirm the involvement of a cloned gene in lipstatin biosynthesis, a gene disruption experiment for the KS gene was performed. However, the resulting gene disruptant did not show any significant difference in lipstatin production when compared to wild-type S. toxytricini. This result suggests that lipstatin may not be synthesized by a type II PKS.
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