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Su J, Tian X, Cheng H, Liu D, Wang Z, Sun S, Wang HW, Sui SF. Structural insight into synergistic activation of human 3-methylcrotonyl-CoA carboxylase. Nat Struct Mol Biol 2025; 32:73-85. [PMID: 39223421 DOI: 10.1038/s41594-024-01379-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Accepted: 07/25/2024] [Indexed: 09/04/2024]
Abstract
The enzymes 3-methylcrotonyl-coenzyme A (CoA) carboxylase (MCC), pyruvate carboxylase and propionyl-CoA carboxylase belong to the biotin-dependent carboxylase family located in mitochondria. They participate in various metabolic pathways in human such as amino acid metabolism and tricarboxylic acid cycle. Many human diseases are caused by mutations in those enzymes but their structures have not been fully resolved so far. Here we report an optimized purification strategy to obtain high-resolution structures of intact human endogenous MCC, propionyl-CoA carboxylase and pyruvate carboxylase in different conformational states. We also determine the structures of MCC bound to different substrates. Analysis of MCC structures in different states reveals the mechanism of the substrate-induced, multi-element synergistic activation of MCC. These results provide important insights into the catalytic mechanism of the biotin-dependent carboxylase family and are of great value for the development of new drugs for the treatment of related diseases.
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Affiliation(s)
- Jiayue Su
- State Key Laboratory of Membrane Biology, Beijing Frontier Research Center for Biological Structures, School of Life Sciences, Tsinghua University, Beijing, China
| | - Xuyang Tian
- State Key Laboratory of Membrane Biology, Beijing Frontier Research Center for Biological Structures, School of Life Sciences, Tsinghua University, Beijing, China
| | - Hang Cheng
- The California Institute for Quantitative Biosciences (QB3), University of California campuses at Berkeley, Berkeley, CA, USA
| | - Desheng Liu
- State Key Laboratory of Membrane Biology, Beijing Frontier Research Center for Biological Structures, School of Life Sciences, Tsinghua University, Beijing, China
| | - Ziyi Wang
- State Key Laboratory of Membrane Biology, Beijing Frontier Research Center for Biological Structures, School of Life Sciences, Tsinghua University, Beijing, China
| | - Shan Sun
- State Key Laboratory of Membrane Biology, Beijing Frontier Research Center for Biological Structures, School of Life Sciences, Tsinghua University, Beijing, China.
| | - Hong-Wei Wang
- State Key Laboratory of Membrane Biology, Beijing Frontier Research Center for Biological Structures, School of Life Sciences, Tsinghua University, Beijing, China.
- Ministry of Education Key Laboratory of Protein Sciences, School of Life Sciences, Tsinghua University, Beijing, China.
- Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China.
| | - Sen-Fang Sui
- State Key Laboratory of Membrane Biology, Beijing Frontier Research Center for Biological Structures, School of Life Sciences, Tsinghua University, Beijing, China.
- School of Life Sciences, Cryo-EM Center, Southern University of Science and Technology, Shenzhen, China.
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2
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Laseke AJ, Boram TJ, Schneider NO, Lohman JR, Maurice MS. Allosteric Site at the Biotin Carboxylase Dimer Interface Mediates Activation and Inhibition in Staphylococcus aureus Pyruvate Carboxylase. Biochemistry 2023; 62:2632-2644. [PMID: 37603581 PMCID: PMC10693930 DOI: 10.1021/acs.biochem.3c00280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Allosteric regulation of the essential anaplerotic enzyme, pyruvate carboxylase (PC), is vital for metabolic homeostasis. PC catalyzes the bicarbonate- and ATP-dependent carboxylation of pyruvate to form oxaloacetate. Dysregulation of PC activity can impact glucose and redox metabolism, which contributes to the pathogenicity of many diseases. To maintain homeostasis, PC is allosterically activated by acetyl-CoA and allosterically inhibited by l-aspartate. In this study, we further characterize the molecular basis of allosteric regulation in Staphylococcus aureus PC (SaPC) using slowly/nonhydrolyzable dethia analogues of acetyl-CoA and site-directed mutagenesis of residues at the biotin carboxylase homodimer interface. The dethia analogues fully activate SaPC but demonstrate significantly reduced binding affinities relative to acetyl-CoA. Residues Arg21, Lys46, and Glu418 of SaPC are located at the biotin carboxylase dimer interface and play a critical role in both allosteric activation and inhibition. A structure of R21A SaPC in complex with acetyl-CoA reveals an intact molecule of acetyl-CoA bound at the allosteric site, offering new molecular insights into the acetyl-CoA binding site. This study demonstrates that the biotin carboxylase domain dimer interface is a critical allosteric site in PC, serving as a convergence point for allosteric activation by acetyl-CoA and inhibition by l-aspartate.
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Affiliation(s)
- Amanda J. Laseke
- Department of Biological Sciences, Marquette University, Milwaukee, WI 53201-1881, USA
| | - Trevor J. Boram
- Department of Biochemistry, Purdue University, 175 S. University St., West Lafayette, IN 47907, United States
| | - Nicholas O. Schneider
- Department of Biological Sciences, Marquette University, Milwaukee, WI 53201-1881, USA
| | - Jeremy R. Lohman
- Department of Biochemistry, Purdue University, 175 S. University St., West Lafayette, IN 47907, United States
- Current Address: Department of Biochemistry and Molecular Biology, Michigan State University, 603 Wilson Road, East Lansing, MI 48824
| | - Martin St. Maurice
- Department of Biological Sciences, Marquette University, Milwaukee, WI 53201-1881, USA
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3
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Indika NLR, Frye RE, Rossignol DA, Owens SC, Senarathne UD, Grabrucker AM, Perera R, Engelen MPKJ, Deutz NEP. The Rationale for Vitamin, Mineral, and Cofactor Treatment in the Precision Medical Care of Autism Spectrum Disorder. J Pers Med 2023; 13:252. [PMID: 36836486 PMCID: PMC9964499 DOI: 10.3390/jpm13020252] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/27/2023] [Accepted: 01/28/2023] [Indexed: 01/31/2023] Open
Abstract
Children with autism spectrum disorder may exhibit nutritional deficiencies due to reduced intake, genetic variants, autoantibodies interfering with vitamin transport, and the accumulation of toxic compounds that consume vitamins. Importantly, vitamins and metal ions are essential for several metabolic pathways and for neurotransmitter functioning. The therapeutic benefits of supplementing vitamins, minerals (Zinc, Magnesium, Molybdenum, and Selenium), and other cofactors (coenzyme Q10, alpha-lipoic acid, and tetrahydrobiopterin) are mediated through their cofactor as well as non-cofactor functions. Interestingly, some vitamins can be safely administered at levels far above the dose typically used to correct the deficiency and exert effects beyond their functional role as enzyme cofactors. Moreover, the interrelationships between these nutrients can be leveraged to obtain synergistic effects using combinations. The present review discusses the current evidence for using vitamins, minerals, and cofactors in autism spectrum disorder, the rationale behind their use, and the prospects for future use.
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Affiliation(s)
- Neluwa-Liyanage R. Indika
- Department of Biochemistry, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - Richard E. Frye
- Autism Discovery and Research Foundation, Phoenix, AZ 85050, USA
- Rossignol Medical Center, Phoenix, AZ 85050, USA
| | - Daniel A. Rossignol
- Rossignol Medical Center, Phoenix, AZ 85050, USA
- Rossignol Medical Center, Aliso Viejo, CA 92656, USA
| | - Susan C. Owens
- Autism Oxalate Project at the Autism Research Institute, San Diego, CA 92116, USA
| | - Udara D. Senarathne
- Department of Biochemistry, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - Andreas M. Grabrucker
- Department of Biological Sciences, University of Limerick, V94 T9PX Limerick, Ireland
- Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
- Health Research Institute (HRI), University of Limerick, V94 T9PX Limerick, Ireland
| | - Rasika Perera
- Department of Biochemistry, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - Marielle P. K. J. Engelen
- Center for Translational Research in Aging & Longevity, Texas A&M University, College Station, TX 77843, USA
| | - Nicolaas E. P. Deutz
- Center for Translational Research in Aging & Longevity, Texas A&M University, College Station, TX 77843, USA
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4
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Burkett DJ, Wyatt BN, Mews M, Bautista A, Engel R, Dockendorff C, Donaldson WA, St Maurice M. Evaluation of α-hydroxycinnamic acids as pyruvate carboxylase inhibitors. Bioorg Med Chem 2019; 27:4041-4047. [PMID: 31351848 DOI: 10.1016/j.bmc.2019.07.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 07/10/2019] [Accepted: 07/14/2019] [Indexed: 10/26/2022]
Abstract
Through a structure-based drug design project (SBDD), potent small molecule inhibitors of pyruvate carboxylase (PC) have been discovered. A series of α-keto acids (7) and α-hydroxycinnamic acids (8) were prepared and evaluated for inhibition of PC in two assays. The two most potent inhibitors were 3,3'-(1,4-phenylene)bis[2-hydroxy-2-propenoic acid] (8u) and 2-hydroxy-3-(quinoline-2-yl)propenoic acid (8v) with IC50 values of 3.0 ± 1.0 μM and 4.3 ± 1.5 μM respectively. Compound 8v is a competitive inhibitor with respect to pyruvate (Ki = 0.74 μM) and a mixed-type inhibitor with respect to ATP, indicating that it targets the unique carboxyltransferase (CT) domain of PC. Furthermore, compound 8v does not significantly inhibit human carbonic anhydrase II, matrix metalloproteinase-2, malate dehydrogenase or lactate dehydrogenase.
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Affiliation(s)
- Daniel J Burkett
- Department of Chemistry, Marquette University, P. O. Box 1881, Milwaukee, WI 53201-1881, USA
| | - Brittney N Wyatt
- Department of Biological Sciences, Marquette University, P. O. Box 1881, Milwaukee, WI 53201-1881, USA
| | - Mallory Mews
- Department of Biological Sciences, Marquette University, P. O. Box 1881, Milwaukee, WI 53201-1881, USA
| | - Anson Bautista
- Department of Chemistry, Marquette University, P. O. Box 1881, Milwaukee, WI 53201-1881, USA
| | - Ryan Engel
- Department of Chemistry, Marquette University, P. O. Box 1881, Milwaukee, WI 53201-1881, USA
| | - Chris Dockendorff
- Department of Chemistry, Marquette University, P. O. Box 1881, Milwaukee, WI 53201-1881, USA
| | - William A Donaldson
- Department of Chemistry, Marquette University, P. O. Box 1881, Milwaukee, WI 53201-1881, USA.
| | - Martin St Maurice
- Department of Biological Sciences, Marquette University, P. O. Box 1881, Milwaukee, WI 53201-1881, USA.
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5
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Sheng X, Hou Q, Liu Y. Computational evidence for the importance of lysine carboxylation in the reaction catalyzed by carboxyl transferase domain of pyruvate carboxylase: a QM/MM study. Theor Chem Acc 2019. [DOI: 10.1007/s00214-018-2408-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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6
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Wyatt BN, Arnold LA, St Maurice M. A high-throughput screening assay for pyruvate carboxylase. Anal Biochem 2018; 550:90-98. [PMID: 29655770 DOI: 10.1016/j.ab.2018.04.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Revised: 04/09/2018] [Accepted: 04/11/2018] [Indexed: 01/20/2023]
Abstract
Pyruvate carboxylase (PC) catalyzes the conversion of pyruvate to oxaloacetate (OAA), an important metabolic reaction in a wide range of organisms. Small molecules directed against PC would enable detailed studies on the metabolic role of this enzyme and would have the potential to be developed into pharmacological agents. Currently, specific and potent small molecule regulators of PC are unavailable. To assist in efforts to find, develop, and characterize small molecule effectors of PC, a novel fixed-time assay has been developed based on the reaction of OAA with the diazonium salt, Fast Violet B (FVB), which produces a colored adduct with an absorbance maximum at 530 nm. This fixed time assay is reproducible, sensitive and responsive to known effectors of Rhizobium etli PC, Staphylococcus aureus PC, and Listeria monocytogenes PC, and is highly amenable to high-throughput screening. The assay was validated using a plate uniformity assessment test and a pilot screen of a library of 1280 compounds. The results indicate that the assay is suitable for screening small molecule libraries to find novel small molecule effectors of PC.
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Affiliation(s)
- Brittney N Wyatt
- Department of Biological Sciences, Marquette University, Milwaukee, WI 53233, USA
| | - Leggy A Arnold
- Department of Chemistry and Biochemistry and Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA
| | - Martin St Maurice
- Department of Biological Sciences, Marquette University, Milwaukee, WI 53233, USA.
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7
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Xue SJ, Chi Z, Zhang Y, Li YF, Liu GL, Jiang H, Hu Z, Chi ZM. Fatty acids from oleaginous yeasts and yeast-like fungi and their potential applications. Crit Rev Biotechnol 2018; 38:1049-1060. [DOI: 10.1080/07388551.2018.1428167] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Si-Jia Xue
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Zhe Chi
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Yu Zhang
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Yan-Feng Li
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Guang-Lei Liu
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Hong Jiang
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Zhong Hu
- Department of Biology, Shantou University, Shantou, China
| | - Zhen-Ming Chi
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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8
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Qayyum S, Khan I, Bhatti ZA, Peng C. Cloning and characterization of F3PYC gene encoding pyruvate carboxylase in Aspergillus flavus strain (F3). 3 Biotech 2017; 7:245. [PMID: 28710744 DOI: 10.1007/s13205-017-0806-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 04/06/2017] [Indexed: 11/24/2022] Open
Abstract
Pyruvate carboxylase is a major enzyme for biosynthesis of organic acids like; citric acid, fumeric acid, and L-malic acid. These organic acids play very important role for biological remediation of heavy metals. In this study, gene walking method was used to clone and characterize pyruvate carboxylase gene (F3PYC) from heavy metal resistant indigenous fungal isolate Aspergillus flavus (F3). 3579 bp of an open reading frame which encodes 1193 amino acid protein (isoelectric point: 6.10) with a calculated molecular weight of 131.2008 kDa was characterized. Deduced protein showed 90-95% similarity to those deduced from PYC gene from different fungal strains including; Aspergillus parasiticus, Neosartorya fischeri, Aspergillus fumigatus, Aspergillus clavatus, and Aspergillus niger. Protein generated from the PYC gene was a homotetramer (α4) and having four potential N-linked glycosylation sites and had no signal peptide. Amongst most possible N-glycosylation sites were -N-S-S-I- at 36 amino acid, -N-G-T-V- at 237 amino acid, N-G-S-S- at 517 amino acid, and N-T-S-R- at 1111 amino acid, with several functions have been proposed for the carbohydrate moiety such as thermal stability, pH, and temperature optima for activity and stabilization of the three-dimensional structure. Hence, cloning of F3PYC gene from A. flavus has important biotechnological applications.
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Affiliation(s)
- Sadia Qayyum
- The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
- Department of Microbiology, Hazara University, Manshera, 21300, Pakistan
| | - Ibrar Khan
- Department of Microbiology, Hazara University, Manshera, 21300, Pakistan
| | - Zulfiqar Ahmad Bhatti
- Environmental Sciences Department, COMSATS Institute of Information Technology, Abbottabad, 22060, Pakistan
| | - Changsheng Peng
- The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
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9
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Cloning and characterization of pyruvate carboxylase gene responsible for calcium malate overproduction in Penicillium viticola 152 and its expression analysis. Gene 2017; 605:81-91. [DOI: 10.1016/j.gene.2016.12.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 12/12/2016] [Accepted: 12/29/2016] [Indexed: 11/22/2022]
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10
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Miller GBS, Uggerud E. Dissociation of Mg(ii) and Zn(ii) complexes of simple 2-oxocarboxylates – relationship to CO2fixation, and the Grignard and Barbier reactions. Org Biomol Chem 2017; 15:6813-6825. [DOI: 10.1039/c7ob01327b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The glyoxylate and pyruvate carboxylates have been complexed to Mg(ii) and Zn(ii) to investigate the intrinsic interactions of these important biochemical species in the gas phase.
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Affiliation(s)
- Glenn B. S. Miller
- Mass Spectrometry Laboratory and Centre of Theoretical and Computational Chemistry
- Department of Chemistry
- University of Oslo
- N-0315 Oslo
- Norway
| | - Einar Uggerud
- Mass Spectrometry Laboratory and Centre of Theoretical and Computational Chemistry
- Department of Chemistry
- University of Oslo
- N-0315 Oslo
- Norway
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11
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Abstract
Pyruvate carboxylase is a metabolic enzyme that fuels the tricarboxylic acid cycle with one of its intermediates and also participates in the first step of gluconeogenesis. This large enzyme is multifunctional, and each subunit contains two active sites that catalyze two consecutive reactions that lead to the carboxylation of pyruvate into oxaloacetate, and a binding site for acetyl-CoA, an allosteric regulator of the enzyme. Pyruvate carboxylase oligomers arrange in tetramers and covalently attached biotins mediate the transfer of carboxyl groups between distant active sites. In this chapter, some of the recent findings on pyruvate carboxylase functioning are presented, with special focus on the structural studies of the full length enzyme. The emerging picture reveals large movements of domains that even change the overall quaternary organization of pyruvate carboxylase tetramers during catalysis.
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Affiliation(s)
- Mikel Valle
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE, 48160, Derio, Spain.
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12
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Proteomic profile of the Bradysia odoriphaga in response to the microbial secondary metabolite benzothiazole. Sci Rep 2016; 6:37730. [PMID: 27883048 PMCID: PMC5121901 DOI: 10.1038/srep37730] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 10/31/2016] [Indexed: 01/15/2023] Open
Abstract
Benzothiazole, a microbial secondary metabolite, has been demonstrated to possess fumigant activity against Sclerotinia sclerotiorum, Ditylenchus destructor and Bradysia odoriphaga. However, to facilitate the development of novel microbial pesticides, the mode of action of benzothiazole needs to be elucidated. Here, we employed iTRAQ-based quantitative proteomics analysis to investigate the effects of benzothiazole on the proteomic expression of B. odoriphaga. In response to benzothiazole, 92 of 863 identified proteins in B. odoriphaga exhibited altered levels of expression, among which 14 proteins were related to the action mechanism of benzothiazole, 11 proteins were involved in stress responses, and 67 proteins were associated with the adaptation of B. odoriphaga to benzothiazole. Further bioinformatics analysis indicated that the reduction in energy metabolism, inhibition of the detoxification process and interference with DNA and RNA synthesis were potentially associated with the mode of action of benzothiazole. The myosin heavy chain, succinyl-CoA synthetase and Ca+-transporting ATPase proteins may be related to the stress response. Increased expression of proteins involved in carbohydrate metabolism, energy production and conversion pathways was responsible for the adaptive response of B. odoriphaga. The results of this study provide novel insight into the molecular mechanisms of benzothiazole at a large-scale translation level and will facilitate the elucidation of the mechanism of action of benzothiazole.
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13
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Westerhold LE, Adams SL, Bergman HL, Zeczycki TN. Pyruvate Occupancy in the Carboxyl Transferase Domain of Pyruvate Carboxylase Facilitates Product Release from the Biotin Carboxylase Domain through an Intermolecular Mechanism. Biochemistry 2016; 55:3447-60. [PMID: 27254467 DOI: 10.1021/acs.biochem.6b00372] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Protein structure, ligand binding, and catalytic turnover contributes to the governance of catalytic events occurring at spatially distinct domains in multifunctional enzymes. Coordination of these catalytic events partially rests on the ability of spatially discrete active sites to communicate with other allosteric and active sites on the same polypeptide chain (intramolecular) or on different polypeptide chains (intermolecular) within the holoenzyme. Often, communication results in long-range effects on substrate binding or product release. For example, pyruvate binding to the carboxyl transferase (CT) domain of pyruvate carboxylase (PC) increases the rate of product release in the biotin carboxylase (BC) domain. In order to address how CT domain ligand occupancy is "sensed" by other domains, we generated functional, mixed hybrid tetramers using the E218A (inactive BC domain) and T882S (low pyruvate binding, low activity) mutant forms of PC. The apparent Ka pyruvate for the pyruvate-stimulated release of Pi catalyzed by the T882S:E218A[1:1] hybrid tetramer was comparable to the wild-type enzyme and nearly 10-fold lower than that for the T882S homotetramer. In addition, the ratio of the rates of oxaloacetate formation to Pi release for the WT:T882S[1:1] and E218A:T882S[1:1] hybrid tetramer-catalyzed reactions was 0.5 and 0.6, respectively, while the T882S homotetramer exhibited a near 1:1 coupling of the two domains, suggesting that the mechanisms coordinating catalytic events is more complicated that we initially assumed. The results presented here are consistent with an intermolecular communication mechanism, where pyruvate binding to the CT domain is "sensed" by domains on a different polypeptide chain within the tetramer.
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Affiliation(s)
- Lauren E Westerhold
- Department of Biochemistry and Molecular Biology and the ‡East Carolina Diabetes and Obesity Institute, Brody School of Medicine at East Carolina University , Greenville, North Carolina 27834, United States
| | - Stephanie L Adams
- Department of Biochemistry and Molecular Biology and the ‡East Carolina Diabetes and Obesity Institute, Brody School of Medicine at East Carolina University , Greenville, North Carolina 27834, United States
| | - Hanna L Bergman
- Department of Biochemistry and Molecular Biology and the ‡East Carolina Diabetes and Obesity Institute, Brody School of Medicine at East Carolina University , Greenville, North Carolina 27834, United States
| | - Tonya N Zeczycki
- Department of Biochemistry and Molecular Biology and the ‡East Carolina Diabetes and Obesity Institute, Brody School of Medicine at East Carolina University , Greenville, North Carolina 27834, United States
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14
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Fu GY, Lu Y, Chi Z, Liu GL, Zhao SF, Jiang H, Chi ZM. Cloning and Characterization of a Pyruvate Carboxylase Gene from Penicillium rubens and Overexpression of the Genein the Yeast Yarrowia lipolytica for Enhanced Citric Acid Production. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2016; 18:1-14. [PMID: 26470708 DOI: 10.1007/s10126-015-9665-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 08/12/2015] [Indexed: 06/05/2023]
Abstract
In this study, a pyruvate carboxylase gene (PYC1) from a marine fungus Penicillium rubens I607 was cloned and characterized. ORF of the gene (accession number: KM397349.1) had 3534 bp encoding 1177 amino acids with a molecular weight of 127.531 kDa and a PI of 6.20. The promoter of the gene was located at -1200 bp and contained a TATAA box, several CAAT boxes and a sequence 5'-SYGGRG-3'. The PYC1 deduced from the gene had no signal peptide, was a homotetramer (α4), and had the four functional domains. After expression of the PYC1 gene from the marine fungus in the marine-derived yeast Yarrowia lipolytica SWJ-1b, the transformant PR32 obtained had much higher specific pyruvate carboxylase activity (0.53 U/mg) than Y. lipolytica SWJ-1b (0.07 U/mg), and the PYC1 gene expression (133.8%) and citric acid production (70.2 g/l) by the transformant PR32 were also greatly enhanced compared to those (100 % and 27.3 g/l) by Y. lipolytica SWJ-1b. When glucose concentration in the medium was 60.0 g/l, citric acid (CA) concentration formed by the transformant PR32 was 36.1 g/l, leading to conversion of 62.1% of glucose into CA. During a 10-l fed-batch fermentation, the final concentration of CA was 111.1 ± 1.3 g/l, the yield was 0.93 g/g, the productivity was 0.46 g/l/h, and only 1.72 g/l reducing sugar was left in the fermented medium within 240 h. HPLC analysis showed that most of the fermentation products were CA. However, minor malic acid and other unknown products also existed in the culture.
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15
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A. Alhasawi A, D. Appanna V. Manganese orchestrates a metabolic shift leading to the increased bioconversion of glycerol into α-ketoglutarate. AIMS BIOENGINEERING 2016. [DOI: 10.3934/bioeng.2017.1.12] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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16
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Role of pyruvate carboxylase in accumulation of intracellular lipid of the oleaginous yeast Yarrowia lipolytica ACA-DC 50109. Appl Microbiol Biotechnol 2014; 99:1637-45. [DOI: 10.1007/s00253-014-6236-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Revised: 10/31/2014] [Accepted: 11/13/2014] [Indexed: 02/07/2023]
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17
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Lietzan AD, Lin Y, St Maurice M. The role of biotin and oxamate in the carboxyltransferase reaction of pyruvate carboxylase. Arch Biochem Biophys 2014; 562:70-9. [PMID: 25157442 PMCID: PMC4197081 DOI: 10.1016/j.abb.2014.08.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 07/16/2014] [Accepted: 08/12/2014] [Indexed: 01/15/2023]
Abstract
Pyruvate carboxylase (PC) is a biotin-dependent enzyme that catalyzes the MgATP-dependent carboxylation of pyruvate to oxaloacetate, an important anaplerotic reaction in central metabolism. During catalysis, carboxybiotin is translocated to the carboxyltransferase domain where the carboxyl group is transferred to the acceptor substrate, pyruvate. Many studies on the carboxyltransferase domain of PC have demonstrated an enhanced oxaloacetate decarboxylation activity in the presence of oxamate and it has been shown that oxamate accepts a carboxyl group from carboxybiotin during oxaloacetate decarboxylation. The X-ray crystal structure of the carboxyltransferase domain from Rhizobium etli PC reveals that oxamate is positioned in the active site in an identical manner to the substrate, pyruvate, and kinetic data are consistent with the oxamate-stimulated decarboxylation of oxaloacetate proceeding through a simple ping-pong bi bi mechanism in the absence of the biotin carboxylase domain. Additionally, analysis of truncated PC enzymes indicates that the BCCP domain devoid of biotin does not contribute directly to the enzymatic reaction and conclusively demonstrates a biotin-independent oxaloacetate decarboxylation activity in PC. These findings advance the description of catalysis in PC and can be extended to the study of related biotin-dependent enzymes.
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Affiliation(s)
- Adam D Lietzan
- Department of Biological Sciences, Marquette University, Milwaukee, WI 53201, USA
| | - Yi Lin
- Department of Biological Sciences, Marquette University, Milwaukee, WI 53201, USA
| | - Martin St Maurice
- Department of Biological Sciences, Marquette University, Milwaukee, WI 53201, USA.
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Frantom PA, Birman Y, Hays BN, Casey AK. An evolutionarily conserved alternate metal ligand is important for activity in α-isopropylmalate synthase from Mycobacterium tuberculosis. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2014; 1844:1784-9. [PMID: 25064783 DOI: 10.1016/j.bbapap.2014.07.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2014] [Revised: 07/14/2014] [Accepted: 07/16/2014] [Indexed: 11/29/2022]
Abstract
Members of the DRE-TIM metallolyase superfamily rely on an active-site divalent cation to catalyze various reactions involving the making and breaking of carbon-carbon bonds. While the identity of the metal varies, the binding site is well-conserved at the superfamily level with an aspartic acid and two histidine residues acting as ligands to the metal. Previous structural and bioinformatics results indicate that the metal can adopt an alternate architecture through the addition of an asparagine residue as a fourth ligand. This asparagine residue is strictly conserved in all members of the DRE-TIM metallolyase superfamily except fungal homocitrate synthase (HCS-lys) where it is replaced with isoleucine. The role of this additional metal ligand in α-isopropylmalate synthase from Mycobacterium tuberculosis (MtIPMS) has been investigated using site-directed mutagenesis. Substitution of the asparagine ligand with alanine or isoleucine results in inactive enzymes with respect to α-isopropylmalate formation. Control experiments suggest that the substitutions have not drastically affected the enzyme's structure indicating that the asparagine residue is essential for catalysis. Interestingly, all enzyme variants retained acetyl CoA hydrolysis activity in the absence of α-ketoisovalerate, similar to the wild-type enzyme. In contrast to the requirement of magnesium for α-isopropylmalate formation, hydrolytic activity could be inhibited by the addition of magnesium chloride in wild-type, D81E, and N321A MtIPMS, but not in the other variants studied. Attempts to rescue loss of activity in N321I MtIPMS by mimicking the fungal HCS active site through the D81E/N321I double variant were unsuccessful. This suggests epistatic constraints in evolution of function in IPMS and HCS-lys enzymes.
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Affiliation(s)
- Patrick A Frantom
- Department of Chemistry, The University of Alabama, 250 Hackberry Lane, Tuscaloosa, AL 35406, USA.
| | - Yuliya Birman
- Department of Chemistry, The University of Alabama, 250 Hackberry Lane, Tuscaloosa, AL 35406, USA
| | - Brittani N Hays
- Department of Chemistry, The University of Alabama, 250 Hackberry Lane, Tuscaloosa, AL 35406, USA
| | - Ashley K Casey
- Department of Chemistry, The University of Alabama, 250 Hackberry Lane, Tuscaloosa, AL 35406, USA
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19
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Sheng X, Liu Y. QM/MM Study of the Reaction Mechanism of the Carboxyl Transferase Domain of Pyruvate Carboxylase from Staphylococcus aureus. Biochemistry 2014; 53:4455-66. [DOI: 10.1021/bi500020r] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiang Sheng
- School
of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China
| | - Yongjun Liu
- School
of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China
- Northwest
Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810001, China
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Casey AK, Hicks MA, Johnson JL, Babbitt PC, Frantom PA. Mechanistic and bioinformatic investigation of a conserved active site helix in α-isopropylmalate synthase from Mycobacterium tuberculosis, a member of the DRE-TIM metallolyase superfamily. Biochemistry 2014; 53:2915-25. [PMID: 24720347 PMCID: PMC4025573 DOI: 10.1021/bi500246z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The characterization of functionally diverse enzyme superfamilies provides the opportunity to identify evolutionarily conserved catalytic strategies, as well as amino acid substitutions responsible for the evolution of new functions or specificities. Isopropylmalate synthase (IPMS) belongs to the DRE-TIM metallolyase superfamily. Members of this superfamily share common active site elements, including a conserved active site helix and an HXH divalent metal binding motif, associated with stabilization of a common enolate anion intermediate. These common elements are overlaid by variations in active site architecture resulting in the evolution of a diverse set of reactions that include condensation, lyase/aldolase, and carboxyl transfer activities. Here, using IPMS, an integrated biochemical and bioinformatics approach has been utilized to investigate the catalytic role of residues on an active site helix that is conserved across the superfamily. The construction of a sequence similarity network for the DRE-TIM metallolyase superfamily allows for the biochemical results obtained with IPMS variants to be compared across superfamily members and within other condensation-catalyzing enzymes related to IPMS. A comparison of our results with previous biochemical data indicates an active site arginine residue (R80 in IPMS) is strictly required for activity across the superfamily, suggesting that it plays a key role in catalysis, most likely through enolate stabilization. In contrast, differential results obtained from substitution of the C-terminal residue of the helix (Q84 in IPMS) suggest that this residue plays a role in reaction specificity within the superfamily.
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Affiliation(s)
- Ashley K Casey
- Department of Chemistry, The University of Alabama , 250 Hackberry Lane, Tuscaloosa, Alabama 35406, United States
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Lietzan AD, St. Maurice M. Functionally diverse biotin-dependent enzymes with oxaloacetate decarboxylase activity. Arch Biochem Biophys 2014; 544:75-86. [DOI: 10.1016/j.abb.2013.10.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2013] [Revised: 10/15/2013] [Accepted: 10/18/2013] [Indexed: 12/31/2022]
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