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Characterization of acetolactate decarboxylase of Streptococcus thermophilus and its stereoselectivity in decarboxylation of α-hydroxy-β-ketoacids. Bioorg Chem 2022; 122:105719. [DOI: 10.1016/j.bioorg.2022.105719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 01/29/2022] [Accepted: 03/02/2022] [Indexed: 11/22/2022]
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Fernandez MC, O'Flaherty C. Peroxiredoxin 6 is the primary antioxidant enzyme for the maintenance of viability and DNA integrity in human spermatozoa. Hum Reprod 2020; 33:1394-1407. [PMID: 29912414 DOI: 10.1093/humrep/dey221] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 05/07/2018] [Accepted: 06/05/2018] [Indexed: 01/24/2023] Open
Abstract
STUDY QUESTION Are all components of the peroxiredoxins (PRDXs) system important to control the levels of reactive oxygen species (ROS) to maintain viability and DNA integrity in spermatozoa? SUMMARY ANSWER PRDX6 is the primary player of the PRDXs system for maintaining viability and DNA integrity in human spermatozoa. WHAT IS KNOWN ALREADY Mammalian spermatozoa are sensitive to high levels of ROS and PRDXs are antioxidant enzymes proven to control the levels of ROS generated during sperm capacitation to avoid oxidative damage in the spermatozoon. Low amounts of PRDXs are associated with male infertility. The absence of PRDX6 promotes sperm oxidative damage and infertility in mice. STUDY DESIGN, SIZE, DURATION Semen samples were obtained over a period of one year from a cohort of 20 healthy non-smoking volunteers aged 22-30 years old. PARTICIPANTS/MATERIALS, SETTING, METHODS Sperm from healthy donors was incubated for 2 h in the absence or presence of inhibitors for the 2-Cys PRDXs system (peroxidase, reactivation system and NADPH-enzymes suppliers) or the 1-Cys PRDX system (peroxidase and calcium independent-phospholipase A2 (Ca2+-iPLA2) activity). Sperm viability, DNA oxidation, ROS levels, mitochondrial membrane potential and 4-hydroxynonenal production were determined by flow cytometry. MAIN RESULTS AND THE ROLE OF CHANCE We observed a significant decrease in viable cells due to inhibitors of the 2-Cys PRDXs, PRDX6 Ca2+-iPLA2 activity or the PRDX reactivation system compared to controls (P ≤ 0.05). PRDX6 Ca2+-iPLA2 activity inhibition had the strongest detrimental effect on sperm viability and DNA oxidation compared to controls (P ≤ 0.05). The 2-Cys PRDXs did not compensate for the inhibition of PRDX6 peroxidase and Ca2+-iPLA2 activities. LARGE SCALE DATA Not applicable. LIMITATIONS, REASONS FOR CAUTION Players of the reactivation systems may differ among mammalian species. WIDER IMPLICATIONS OF THE FINDINGS The Ca2+-iPLA2 activity of PRDX6 is the most important and first line of defense against oxidative stress in human spermatozoa. Peroxynitrite is scavenged mainly by the PRDX6 peroxidase activity. These findings can help to design new diagnostic tools and therapies for male infertility. STUDY FUNDING/COMPETING INTEREST(S) This research was supported by The Canadian Institutes of Health Research (MOP 133661 to C.O.), and by RI MUHC-Desjardins Studentship in Child Health Research awarded to M.C.F. The authors have nothing to disclose.
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Affiliation(s)
- Maria C Fernandez
- The Research Institute of the McGill University Health Centre, Montreal, QC, Canada.,Department of Surgery (Urology Division), McGill University, Montréal, QC, Canada
| | - Cristian O'Flaherty
- The Research Institute of the McGill University Health Centre, Montreal, QC, Canada.,Department of Surgery (Urology Division), McGill University, Montréal, QC, Canada.,Department of Pharmacology and Therapeutics, McGill University, Montréal, QC, Canada
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Cordero-Martínez J, Flores-Alonso JC, Aguirre-Alvarado C, Oviedo N, Alcántara-Farfán V, García-Pérez CA, Bermúdez-Ruiz KF, Jiménez-Gutiérrez GE, Rodríguez-Páez L. Influence of Echeveria gibbiflora DC aqueous crude extract on mouse sperm energy metabolism and calcium-dependent channels. JOURNAL OF ETHNOPHARMACOLOGY 2020; 248:112321. [PMID: 31655146 DOI: 10.1016/j.jep.2019.112321] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 09/27/2019] [Accepted: 10/16/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGY RELEVANCE In traditional Mexican medicine, Echeveria gibbiflora DC has been used as a vaginal post-coital rinse to prevent pregnancy. The aqueous crude extract (OBACE) induces sperm immobilization/agglutination and a hypotonic-like effect, likely attributed to the high concentration of calcium bis-(hydrogen-1-malate) hexahydrate [Ca2+ (C4H5O5)2•6H2O]. Likewise, OBACE impedes the increase of [Ca2+]i during capacitation. AIM OF THE STUDY Evaluate the effect of OBACE on sperm energy metabolism and the underlying mechanism of action on sperm-specific channel. MATERIAL AND METHODS In vitro, we quantified the mouse sperm immobilization effect and the antifertility potential of OBACE. The energetic metabolism status was also evaluated by assessing the ATP levels, general mitochondrial activity, mitochondrial membrane potential, and enzymatic activity of three key enzymes of energy metabolism. Furthermore, the effect of the ion efflux of Cl- and K+, as well as the pHi, were investigated in order to elucidate which channel is suitable to perform an in silico study. RESULTS Total and progressive motility notably decreased, as did fertility rates. ATP levels, mitochondrial activity and membrane potential were reduced. Furthermore, the activities of the three enzymes decreased. Neither Cl- or K+ channels activities were affected at low concentrations of OBACE; nevertheless, pHi did not alkalinize. Finally, an in silico analysis was performed between the Catsper channel and calcium bis-(hydrogen-1-malate) hexahydrate, which showed a possible blockade of this sperm cation channel. CONCLUSION The results were useful to elucidate the effect of OBACE and to propose it as a future male contraceptive.
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Affiliation(s)
- Joaquín Cordero-Martínez
- Laboratorio de Bioquímica Farmacológica, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, 11340, Mexico
| | - Juan Carlos Flores-Alonso
- Laboratorio de Biología de la Reproducción, Centro de Investigación Biomédica de Oriente, Hospital General de Zona #5, Metepec, Instituto Mexicano del Seguro Social, Metepec, Puebla, Mexico
| | - Charmina Aguirre-Alvarado
- Laboratorio de Bioquímica Farmacológica, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, 11340, Mexico; Unidad de Investigación Médica en Inmunología e Infectología, Centro Médico Nacional, La Raza, IMSS, Ciudad de México, Mexico
| | - Norma Oviedo
- Unidad de Investigación Médica en Inmunología e Infectología, Centro Médico Nacional, La Raza, IMSS, Ciudad de México, Mexico
| | - Verónica Alcántara-Farfán
- Laboratorio de Bioquímica Farmacológica, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, 11340, Mexico
| | | | - Karla Fernanda Bermúdez-Ruiz
- Laboratorio de Bioquímica Farmacológica, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, 11340, Mexico
| | - Guadalupe Elizabeth Jiménez-Gutiérrez
- Laboratorio de Bioquímica Farmacológica, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, 11340, Mexico
| | - Lorena Rodríguez-Páez
- Laboratorio de Bioquímica Farmacológica, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, 11340, Mexico.
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Gronczewska J, Niedźwiecka N, Grzyb K, Skorkowski EF. Bioenergetics of fish spermatozoa with focus on some herring (Clupea harengus) enzymes. FISH PHYSIOLOGY AND BIOCHEMISTRY 2019; 45:1615-1625. [PMID: 31111318 PMCID: PMC6815267 DOI: 10.1007/s10695-019-00650-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 04/25/2019] [Indexed: 06/02/2023]
Abstract
Herring (Clupea harengus) shows the unique behavior of reproductive biology in which spermatozoa remains in the surrounding media for extended periods. It is an excellent model for studying the malic enzyme (ME) and creatine kinase (CK) biochemical properties because of their high activity and variability of molecular isoforms. The specific activity of NAD-preferring ME in herring spermatozoa is the highest among other fish spermatozoa and is localized in its large mitochondrion. Two different CK isoforms, dimer and octamer, were detected in herring spermatozoa. It has already been shown that CK isoforms play an important role in energy homeostasis by catalyzing a reversible transfer of the phosphate of ATP to creatine to yield ADP and creatine phosphate (CP) (creatine/CP circuit). Two lactate dehydrogenase (LDH) isoenzymes were also shown in herring spermatozoa, LDH-B4 and LDH-A2B2. In this mini-review, the role of ME and energy transport system with easily diffusible creatine and CP in herring spermatozoa is discussed.
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Affiliation(s)
- J. Gronczewska
- Department of Molecular Evolution, Faculty of Biology, University of Gdańsk, 80-308 Gdańsk, Poland
| | - N. Niedźwiecka
- Department of Molecular Evolution, Faculty of Biology, University of Gdańsk, 80-308 Gdańsk, Poland
| | - K. Grzyb
- Department of Molecular Evolution, Faculty of Biology, University of Gdańsk, 80-308 Gdańsk, Poland
| | - E. F. Skorkowski
- Department of Molecular Evolution, Faculty of Biology, University of Gdańsk, 80-308 Gdańsk, Poland
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Ji F, Feng Y, Li M, Long F, Yang Y, Wang T, Wang J, Bao Y, Xue S. Structure and catalytic mechanistic insight into Enterobacter aerogenes acetolactate decarboxylase. Enzyme Microb Technol 2019; 126:9-17. [PMID: 31000168 DOI: 10.1016/j.enzmictec.2019.03.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 02/20/2019] [Accepted: 03/04/2019] [Indexed: 11/25/2022]
Abstract
α-Acetolactate decarboxylase (ALDC) catalyses α-acetolactate into acetoin (3-hydroxy-2-butanone, AC) and is considered to be the rate-limiting enzyme in the synthesis of 2,3-butanediol. In this work, the enzymatic activity of ALDC from Enterobacter aerogenes ALDC (E.a.-ALDC) was fully characterized with enzyme kinetics, indicating a Km of 14.83 ± 0.87 mM and a kcat of 0.81 ± 0.09 s-1. However, compared with the activities of ALDCs reported from other bacteria, the activity of E.a.-ALDC was determined to present a relatively lower value of 849.08 ± 35.21 U/mg. The enzyme showed maximum activity at pH 5.5. In addition, the activity of E.a.-ALDC was promoted by Mg2+. The crystal structure of E.a.-ALDC firstly solved by X-ray crystallography at resolution of 2.4 Å revealed a chelated zinc ion with conserved His199, His201, His212, Glu70 and Glu259. In the active center, the conservative Arg150 was particularly proven to deviate from the zinc ion of the active centre, by adopting a flexible conformational change, resulting in a weak interaction network of the enzyme and the substrate. Further in silico docking of E.a.-ALDC with two enantiomers, (R)-acetolactate and (S)-acetolactate, unaltered the interaction network of E.a.-ALDC from the apo structure, which confirmed the weakened role of Arg150 in the catalytic properties of E.a.-ALDC. Our results reveal a unique structure-function relationship of acetolactate decarboxylase and provide a fundamental basis for the enzymatic synthesis of acetoin.
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Affiliation(s)
- Fangling Ji
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, 116024, PR China.
| | - Yanbin Feng
- Marine Bioengineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023, PR China
| | - Mingyang Li
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, 116024, PR China
| | - Feida Long
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, 116024, PR China
| | - Yongliang Yang
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, 116024, PR China
| | - Tianqi Wang
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, 116024, PR China
| | - Jingyun Wang
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, 116024, PR China
| | - Yongming Bao
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, 116024, PR China; School of Food and Environment Science and Engineering, Dalian University of Technology, Panjin, Liaoning, 12422, PR China
| | - Song Xue
- Marine Bioengineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023, PR China.
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Ji F, Feng Y, Li M, Yang Y, Wang T, Wang J, Bao Y, Xue S. Studies on structure-function relationships of acetolactate decarboxylase from Enterobacter cloacae. RSC Adv 2018; 8:39066-39073. [PMID: 35558320 PMCID: PMC9090609 DOI: 10.1039/c8ra07379a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/15/2018] [Indexed: 12/29/2022] Open
Abstract
Acetoin is an important bio-based platform chemical with wide applications. Among all bacterial strains, Enterobacter cloacae is a well-known acetoin producer via α-acetolactate decarboxylase (ALDC), which converts α-acetolactate into acetoin and is identified as the key enzyme in the biosynthetic pathway of acetoin. In this work, the enzyme properties of Enterobacter cloacae ALDC (E.c.-ALDC) were characterized, revealing a K m value of 12.19 mM and a k cat value of 0.96 s-1. Meanwhile, the optimum pH of E.c.-ALDC was 6.5, and the activity of E.c.-ALDC was activated by Mn2+, Ba2+, Mg2+, Zn2+ and Ca2+, while Cu2+ and Fe2+ significantly inhibited ALDC activity. More importantly, we solved and reported the first crystal structure of E.c.-ALDC at 2.4 Å resolution. The active centre consists of a zinc ion coordinated by highly conserved histidines (199, 201 and 212) and glutamates (70 and 259). However, the conserved Arg150 in E.c.-ALDC orients away from the zinc ion in the active centre of the molecule, losing contact with the zinc ion. Molecular docking of the two enantiomers of α-acetolactate, (R)-acetolactate and (S)-acetolactate allows us to further investigate the interaction networks of E.c.-ALDC with the unique conformation of Arg150. In the models, no direct contacts are observed between Arg150 and the substrates, which is unlikely to maintain the stabilization function of Arg150 in the catalytic reaction. The structure of E.c.-ALDC provides valuable information about its function, allowing a deeper understanding of the catalytic mechanism of ALDCs.
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Affiliation(s)
- Fangling Ji
- School of Life Science and Biotechnology, Dalian University of Technology Dalian Liaoning 116024 P. R. China
| | - Yanbin Feng
- Marine Bioengineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian Liaoning 116023 P. R. China
| | - Mingyang Li
- School of Life Science and Biotechnology, Dalian University of Technology Dalian Liaoning 116024 P. R. China
| | - Yongliang Yang
- School of Life Science and Biotechnology, Dalian University of Technology Dalian Liaoning 116024 P. R. China
| | - Tianqi Wang
- School of Life Science and Biotechnology, Dalian University of Technology Dalian Liaoning 116024 P. R. China
| | - Jingyun Wang
- School of Life Science and Biotechnology, Dalian University of Technology Dalian Liaoning 116024 P. R. China
| | - Yongming Bao
- School of Life Science and Biotechnology, Dalian University of Technology Dalian Liaoning 116024 P. R. China
- School of Food and Environment Science and Engineering, Dalian University of Technology Panjin Liaoning 12422 P. R. China
| | - Song Xue
- Marine Bioengineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian Liaoning 116023 P. R. China
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Tang RR, Chi Z, Jiang H, Liu GL, Xue SJ, Hu Z, Chi ZM. Overexpression of a pyruvate carboxylase gene enhances extracellular liamocin and intracellular lipid biosynthesis by Aureobasidium melanogenum M39. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.03.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Ji F, Li M, Feng Y, Wu S, Wang T, Pu Z, Wang J, Yang Y, Xue S, Bao Y. Structural and enzymatic characterization of acetolactate decarboxylase from Bacillus subtilis. Appl Microbiol Biotechnol 2018; 102:6479-6491. [DOI: 10.1007/s00253-018-9049-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 04/20/2018] [Accepted: 04/24/2018] [Indexed: 11/25/2022]
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