1
|
Boteva E, Doychev K, Kirilov K, Handzhiyski Y, Tsekovska R, Gatev E, Mironova R. Deglycation activity of the Escherichia coli glycolytic enzyme phosphoglucose isomerase. Int J Biol Macromol 2024; 257:128541. [PMID: 38056730 DOI: 10.1016/j.ijbiomac.2023.128541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 11/24/2023] [Accepted: 11/30/2023] [Indexed: 12/08/2023]
Abstract
Glycation is a spontaneous chemical reaction, which affects the structure and function of proteins under normal physiological conditions. Therefore, organisms have evolved diverse mechanisms to combat glycation. In this study, we show that the Escherichia coli glycolytic enzyme phosphoglucose isomerase (Pgi) exhibits deglycation activity. We found that E. coli Pgi catalyzes the breakdown of glucose 6-phosphate (G6P)-derived Amadori products (APs) in chicken lysozyme. The affinity of Pgi to the glycated lysozyme (Km, 1.1 mM) was ten times lower than the affinity to its native substrate, fructose 6-phosphate (Km, 0.1 mM). However, the high kinetic constants of the enzyme with the glycated lysozyme (kcat, 396 s-1 and kcat/Km, 3.6 × 105 M-1 s-1) indicated that the Pgi amadoriase activity may have physiological implications. Indeed, when using total E. coli protein (20 mg/mL) as a substrate in the deglycation reaction, we observed a release of G6P from the bacterial protein at a Pgi specific activity of 33 μmol/min/mg. Further, we detected 11.4 % lower APs concentration in protein extracts from Pgi-proficient vs. deficient cells (p = 0.0006) under conditions where the G6P concentration in Pgi-proficient cells was four times higher than in Pgi-deficient cells (p = 0.0001). Altogether, these data point to physiological relevance of the Pgi deglycation activity.
Collapse
Affiliation(s)
- Elitsa Boteva
- Roumen Tsanev Institute of Molecular Biology, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Konstantin Doychev
- Roumen Tsanev Institute of Molecular Biology, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Kiril Kirilov
- Roumen Tsanev Institute of Molecular Biology, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Yordan Handzhiyski
- Roumen Tsanev Institute of Molecular Biology, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Rositsa Tsekovska
- Roumen Tsanev Institute of Molecular Biology, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Evan Gatev
- Roumen Tsanev Institute of Molecular Biology, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Roumyana Mironova
- Roumen Tsanev Institute of Molecular Biology, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria.
| |
Collapse
|
2
|
Toivari M, Vehkomäki ML, Ruohonen L, Penttilä M, Wiebe MG. Production of D-glucaric acid with phosphoglucose isomerase-deficient Saccharomyces cerevisiae. Biotechnol Lett 2024; 46:69-83. [PMID: 38064042 PMCID: PMC10787697 DOI: 10.1007/s10529-023-03443-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/14/2023] [Accepted: 10/17/2023] [Indexed: 01/14/2024]
Abstract
D-Glucaric acid is a potential biobased platform chemical. Previously mainly Escherichia coli, but also the yeast Saccharomyces cerevisiae, and Pichia pastoris, have been engineered for conversion of D-glucose to D-glucaric acid via myo-inositol. One reason for low yields from the yeast strains is the strong flux towards glycolysis. Thus, to decrease the flux of D-glucose to biomass, and to increase D-glucaric acid yield, the four step D-glucaric acid pathway was introduced into a phosphoglucose isomerase deficient (Pgi1p-deficient) Saccharomyces cerevisiae strain. High D-glucose concentrations are toxic to the Pgi1p-deficient strains, so various feeding strategies and use of polymeric substrates were studied. Uniformly labelled 13C-glucose confirmed conversion of D-glucose to D-glucaric acid. In batch bioreactor cultures with pulsed D-fructose and ethanol provision 1.3 g D-glucaric acid L-1 was produced. The D-glucaric acid titer (0.71 g D-glucaric acid L-1) was lower in nitrogen limited conditions, but the yield, 0.23 g D-glucaric acid [g D-glucose consumed]-1, was among the highest that has so far been reported from yeast. Accumulation of myo-inositol indicated that myo-inositol oxygenase activity was limiting, and that there would be potential to even higher yield. The Pgi1p-deficiency in S. cerevisiae provides an approach that in combination with other reported modifications and bioprocess strategies would promote the development of high yield D-glucaric acid yeast strains.
Collapse
Affiliation(s)
- Mervi Toivari
- VTT Technical Research Centre of Finland Ltd, Tekniikantie 21, P.O. Box 1000, 02044, Espoo, Finland.
| | - Maija-Leena Vehkomäki
- VTT Technical Research Centre of Finland Ltd, Tekniikantie 21, P.O. Box 1000, 02044, Espoo, Finland
| | - Laura Ruohonen
- VTT Technical Research Centre of Finland Ltd, Tekniikantie 21, P.O. Box 1000, 02044, Espoo, Finland
| | - Merja Penttilä
- VTT Technical Research Centre of Finland Ltd, Tekniikantie 21, P.O. Box 1000, 02044, Espoo, Finland
| | - Marilyn G Wiebe
- VTT Technical Research Centre of Finland Ltd, Tekniikantie 21, P.O. Box 1000, 02044, Espoo, Finland
| |
Collapse
|
3
|
Swope N, Lake KE, Barrow GH, Yu D, Fox DA, Columbus L. TM1385 from Thermotoga maritima functions as a phosphoglucose isomerase via cis-enediol-based mechanism with active site redundancy. Biochim Biophys Acta Proteins Proteom 2021; 1869:140602. [PMID: 33422670 DOI: 10.1016/j.bbapap.2021.140602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 12/01/2020] [Accepted: 12/30/2020] [Indexed: 11/28/2022]
Abstract
Phosphoglucose isomerases (PGIs) belong to a class of enzymes that catalyze the reversible isomerization of glucose-6-phosphate to fructose-6-phosphate. PGIs are crucial in glycolysis and gluconeogenesis pathways and proposed as serving additional extracellular functions in eukaryotic organisms. The phosphoglucose isomerase function of TM1385, a previously uncharacterized protein from Thermotoga maritima, was hypothesized based on structural similarity to established PGI crystal structures and computational docking. Kinetic and colorimetric assays combined with 1H nuclear magnetic resonance (NMR) spectroscopy experimentally confirm that TM1385 is a phosphoglucose isomerase (TmPGI). Evidence of solvent exchange in 1H NMR spectra supports that TmPGI isomerization proceeds through a cis-enediol-based mechanism. To determine which amino acid residues are critical for TmPGI catalysis, putative active site residues were mutated with alanine and screened for activity. Results support that E281 is most important for TmPGI formation of the cis-enediol intermediate, and the presence of either H310 or K422 may be required for catalysis, similar to previous observations from homologous PGIs. However, only TmPGI E281A/Q415A and H310A/K422A double mutations abolished activity, suggesting that there are redundant catalytic residues, and Q415 may participate in sugar phosphate isomerization upon E281 mutation. Combined, we propose that TmPGI E281 participates directly in the cis-enediol intermediate step, and either H310 or K422 may facilitate sugar ring opening and closure.
Collapse
Affiliation(s)
- Nicole Swope
- Department of Chemistry, University of Virginia, Charlottesville, VA, USA
| | - Katherine E Lake
- Department of Chemistry, University of Virginia, Charlottesville, VA, USA
| | - Golda H Barrow
- Department of Chemistry, University of Virginia, Charlottesville, VA, USA
| | - Daniel Yu
- Department of Chemistry, University of Virginia, Charlottesville, VA, USA
| | - Daniel A Fox
- Department of Chemistry, University of Virginia, Charlottesville, VA, USA
| | - Linda Columbus
- Department of Chemistry, University of Virginia, Charlottesville, VA, USA.
| |
Collapse
|
4
|
Vorobyeva NN, Kurilova SA, Vlasova AV, Anashkin VA, Nazarova TI, Rodina EV, Baykov AA. Constitutive inorganic pyrophosphatase as a reciprocal regulator of three inducible enzymes in Escherichia coli. Biochim Biophys Acta Gen Subj 2020; 1865:129762. [PMID: 33053413 DOI: 10.1016/j.bbagen.2020.129762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 08/30/2020] [Accepted: 10/07/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Previous studies have demonstrated the formation of stable complexes between inorganic pyrophosphatase (PPase) and three other Escherichia coli enzymes - cupin-type phosphoglucose isomerase (cPGI), class I fructose-1,6-bisphosphate aldolase (FbaB) and l-glutamate decarboxylase (GadA). METHODS Here, we determined by activity measurements how complex formation between these enzymes affects their activities and oligomeric structure. RESULTS cPGI activity was modulated by all partner proteins, but none was reciprocally affected by cPGI. PPase activity was down-regulated upon complex formation, whereas all other enzymes were up-regulated. For cPGI, the activation was partially counteracted by a shift in dimer ⇆ hexamer equilibrium to inactive hexamer. Complex stoichiometry appeared to be 1:1 in most cases, but FbaB formed both 1:1 and 1:2 complexes with both GadA and PPase, FbaB activation was only observed in the 1:2 complexes. FbaB and GadA induced functional asymmetry (negative kinetic cooperativity) in hexameric PPase, presumably by favoring partial dissociation to trimers. CONCLUSIONS These four enzymes form all six possible binary complexes in vitro, resulting in modulated activity of at least one of the constituent enzymes. In five complexes, the effects on activity were unidirectional, and in one complex (FbaB⋅PPase), the effects were reciprocal. The effects of potential physiological significance include inhibition of PPase by FbaB and GadA and activation of FbaB and cPGI by PPase. Together, they provide a mechanism for feedback regulation of FbaB and GadA biosynthesis. GENERAL SIGNIFICANCE These findings indicate the complexity of functionally significant interactions between cellular enzymes, which classical enzymology treats as individual entities, and demonstrate their moonlighting activities as regulators.
Collapse
Affiliation(s)
- Natalia N Vorobyeva
- Department of Chemistry and Belozersky, Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119992, Russian Federation
| | - Svetlana A Kurilova
- Department of Chemistry and Belozersky, Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119992, Russian Federation
| | - Anna V Vlasova
- Department of Chemistry and Belozersky, Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119992, Russian Federation
| | - Viktor A Anashkin
- Department of Chemistry and Belozersky, Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119992, Russian Federation
| | - Tatiana I Nazarova
- Department of Chemistry and Belozersky, Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119992, Russian Federation
| | - Elena V Rodina
- Department of Chemistry and Belozersky, Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119992, Russian Federation
| | - Alexander A Baykov
- Department of Chemistry and Belozersky, Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119992, Russian Federation.
| |
Collapse
|
5
|
Lin H, Zhu L, Baker SS, Baker RD, Lee T. Secreted phosphoglucose isomerase is a novel biomarker of nonalcoholic fatty liver in mice and humans. Biochem Biophys Res Commun 2020; 529:1101-5. [PMID: 32819571 DOI: 10.1016/j.bbrc.2020.06.126] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 06/24/2020] [Indexed: 02/07/2023]
Abstract
The current gold standard for diagnosis of nonalcoholic fatty liver disease (NAFLD) and nonalcoholic steatohepatitis (NASH) is through a liver biopsy, and there is an urgent need to develop non-invasive methods for early detection. We previously demonstrated metabolic remodeling in the mouse fatty liver, which is marked by increased hepatic expression and activities of phosphoglucose isomerase (PGI) and several other glycolytic enzymes. Since PGI is actively transported out of the cell, acting as a multifunctional cytokine referred to as autocrine motility factor (AMF), we explored the possibility that PGI secreted from the fatty liver may be targeted for early detection of the silent disease. We report here that mice with NASH exhibited significantly elevated serum PGI enzyme activities compared to normal control (P < 0.005). We further confirmed the finding using serum/plasma samples (n = 73) collected from a cohort of NASH patients who were diagnosed according to Kleiner’s criteria, showing a normal mean PGI of 19.5 ± 8.8 IU/L and patient mean PGI of 105.6 ± 79.9 IU/L (P < 0.005). In addition, elevated blood PGI in NASH patients coincided with increased blood L-lactate. Cell culture experiments were then conducted to delineate the PGI-lactate axis, which revealed that treatment of HepG2 cells with recombinant PGI protein stimulated glycolysis and lactate output, suggesting that the disease-induced PGI likely contributed to the increased lactate in NASH patients. Taken together, the preclinical and clinical data validate secreted PGI as a useful biomarker of the fatty liver that can be easily screened at the point of care.
Collapse
|
6
|
Ahmad L, Plancqueel S, Lazar N, Korri-Youssoufi H, Li de la Sierra-Gallay I, van Tilbeurgh H, Salmon L. Novel N-substituted 5-phosphate-d-arabinonamide derivatives as strong inhibitors of phosphoglucose isomerases: Synthesis, structure-activity relationship and crystallographic studies. Bioorg Chem 2020; 102:104048. [PMID: 32682158 DOI: 10.1016/j.bioorg.2020.104048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 05/26/2020] [Accepted: 06/24/2020] [Indexed: 10/24/2022]
Abstract
Phosphoglucose isomerase (PGI) is a cytosolic enzyme that catalyzes the reversible interconversion of d-glucose 6-phosphate and d-fructose 6-phosphate in glycolysis. Outside the cell, PGI is also known as autocrine motility factor (AMF), a cytokine secreted by a large variety of tumor cells that stimulates motility of cancer cells in vitro and metastases development in vivo. Human PGI and AMF are strictly identical proteins both in terms of sequence and 3D structure, and AMF activity is known to involve, at least in part, the enzymatic active site. Hence, with the purpose of finding new strong AMF-PGI inhibitors that could be potentially used as anticancer agents and/or as bioreceptors for carbohydrate-based electrochemical biosensors, we report in this study the synthesis and kinetic evaluation of several new human PGI inhibitors derived from the synthon 5-phospho-d-arabinono-1,4-lactone. Although not designed as high-energy intermediate analogue inhibitors of the enzyme catalyzed isomerization reaction, several of these N-substituted 5-phosphate-d-arabinonamide derivatives appears as new strong PGI inhibitors. For one of them, we report its crystal structure in complex with human PGI at 2.38 Å. Detailed analysis of its interactions at the active site reveals a new binding mode and shows that human PGI is relatively tolerant for modified inhibitors at the "head" C-1 part, offering promising perspectives for the future design of carbohydrate-based biosensors.
Collapse
Affiliation(s)
- Lama Ahmad
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), Equipe de Chimie Bioorganique et Bioinorganique, CNRS UMR8182, LabEx LERMIT, Université Paris-Saclay, Rue du Doyen Georges Poitou, bât. 420, 91405 Orsay Cedex, France
| | - Stéphane Plancqueel
- Institut de Biologie Intégrative de la Cellule (I2BC), CNRS UMR9198, Université Paris-Saclay, Rue du Doyen Georges Poitou, bât. 430, 91405 Orsay Cedex, France
| | - Noureddine Lazar
- Institut de Biologie Intégrative de la Cellule (I2BC), CNRS UMR9198, Université Paris-Saclay, Rue du Doyen Georges Poitou, bât. 430, 91405 Orsay Cedex, France
| | - Hafsa Korri-Youssoufi
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), Equipe de Chimie Bioorganique et Bioinorganique, CNRS UMR8182, LabEx LERMIT, Université Paris-Saclay, Rue du Doyen Georges Poitou, bât. 420, 91405 Orsay Cedex, France
| | - Inès Li de la Sierra-Gallay
- Institut de Biologie Intégrative de la Cellule (I2BC), CNRS UMR9198, Université Paris-Saclay, Rue du Doyen Georges Poitou, bât. 430, 91405 Orsay Cedex, France
| | - Herman van Tilbeurgh
- Institut de Biologie Intégrative de la Cellule (I2BC), CNRS UMR9198, Université Paris-Saclay, Rue du Doyen Georges Poitou, bât. 430, 91405 Orsay Cedex, France
| | - Laurent Salmon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), Equipe de Chimie Bioorganique et Bioinorganique, CNRS UMR8182, LabEx LERMIT, Université Paris-Saclay, Rue du Doyen Georges Poitou, bât. 420, 91405 Orsay Cedex, France.
| |
Collapse
|
7
|
Vorobjeva NN, Kurilova SA, Petukhova AF, Nazarova TI, Kolomijtseva GY, Baykov AA, Rodina EV. A novel, cupin-type phosphoglucose isomerase in Escherichia coli. Biochim Biophys Acta Gen Subj 2020; 1864:129601. [PMID: 32179131 DOI: 10.1016/j.bbagen.2020.129601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 02/25/2020] [Accepted: 03/11/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Escherichia coli cells contain a homolog of presumed 5-keto-4-deoxyuronate isomerase (KduI) from pectin-degrading soil bacteria, but the catalytic activity of the E. coli protein (o-KduI) was never demonstrated. METHODS The known three-dimensional structure of E. coli o-KduI was compared with the available structures of sugar-converting enzymes. Based on the results of this analysis, sugar isomerization activity of recombinant o-KduI was tested against a panel of D-sugars and their derivatives. RESULTS The three-dimensional structure of o-KduI exhibits a close similarity with Pyrococcus furiosus cupin-type phosphoglucose isomerase. In accordance with this similarity, o-KduI was found to catalyze interconversion of glucose-6-phosphate and fructose-6-phosphate and, less efficiently, conversion of glucuronate to fructuronate. o-KduI was hexameric in crystals but represented a mixture of inactive hexamers and active dimers in solution and contained a tightly bound Zn2+ ion. Dilution, substrate binding and Zn2+ removal shifted the hexamer ⇆ dimer equilibrium to the dimers. CONCLUSIONS Our findings identify o-KduI as a novel phosphosugar isomerase in E. coli, whose activity may be regulated by changes in oligomeric structure. GENERAL SIGNIFICANCE More than 5700 protein sequences are annotated as KduI, but their enzymatic activity has not been directly demonstrated. E. coli o-KduI is the first characterized member of this group, and its enzymatic activity was found to be different from the predicted activity.
Collapse
Affiliation(s)
- Natalia N Vorobjeva
- Belozersky Institute of Physico-Chemical Biology and Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | - Svetlana A Kurilova
- Belozersky Institute of Physico-Chemical Biology and Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | - Anastasia F Petukhova
- Belozersky Institute of Physico-Chemical Biology and Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | - Tatiana I Nazarova
- Belozersky Institute of Physico-Chemical Biology and Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | - Galina Ya Kolomijtseva
- Belozersky Institute of Physico-Chemical Biology and Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | - Alexander A Baykov
- Belozersky Institute of Physico-Chemical Biology and Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | - Elena V Rodina
- Belozersky Institute of Physico-Chemical Biology and Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia.
| |
Collapse
|
8
|
Pandey R, Kumar N, Monteiro GA, Veeranki VD, Prazeres DMF. Re-engineering of an Escherichia coli K-12 strain for the efficient production of recombinant human Interferon Gamma. Enzyme Microb Technol 2018; 117:23-31. [PMID: 30037548 DOI: 10.1016/j.enzmictec.2018.06.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 05/23/2018] [Accepted: 06/03/2018] [Indexed: 01/17/2023]
Abstract
The Escherichia coli phosphoglucose isomerase (pgi) mutant strain GALG20 was developed previously from wild-type K12 strain MG1655 for increased plasmid yield. To investigate the potential effects of the pgi deletion/higher plasmid levels on recombinant human Interferon Gamma (IFN-γ) production, a detailed network of the central metabolic pathway (100 metabolites, 114 reactions) of GALG20 and MG1655 was constructed. Elementary mode analysis (EMA) was then performed to compare the phenotypic spaces of both the strains and to check the effect of the pgi deletion on flux efficiency of each metabolic reaction. The results suggested that pgi deletion increases amino acid biosynthesis and flux efficiency towards IFN-γ synthesis by 11%. To further confirm the qualitative prediction that the pgi mutation favours recombinant human IFN-γ expression, GALG20 and MG1655 were lysogenised, transformed with a plasmid coding for IFN-γ and tested alongside with BL21(DE3) for their expression capabilities in shake flask experiments using complex media. IFN-γ gene expression was analysed by quantifying plasmid and mRNA copy number per cell and IFN-γ protein production level. Specific IFN-γ yields confirmed the in silico metabolic network predictions, with GALG20(DE3) producing 3.0-fold and 1.5-fold more IFN-γ as compared to MG1655(DE3) and BL21(DE3), respectively. Most of the total IFN-γ was expressed as inclusion bodies across the three strains: 95% in GALG20(DE3), 97% in BL21(DE3) and 72% in MG1655(DE3). The copy number of mRNA coding for IFN-γ was found to be higher in GALG20(DE3) as compared to the other two strains. Overall, these findings show that GALG20(DE3) has the potential to become an excellent protein expression strain.
Collapse
Affiliation(s)
- Rajat Pandey
- iBB-Institute for Bioengineering and Biosciences, Department of Bioengineering, Instituto Superior Técnico, Lisbon 1049-001, Portugal; Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati 781039, India.
| | - Nitin Kumar
- iBB-Institute for Bioengineering and Biosciences, Department of Bioengineering, Instituto Superior Técnico, Lisbon 1049-001, Portugal; Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Gabriel A Monteiro
- iBB-Institute for Bioengineering and Biosciences, Department of Bioengineering, Instituto Superior Técnico, Lisbon 1049-001, Portugal
| | - Venkata Dasu Veeranki
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - D M F Prazeres
- iBB-Institute for Bioengineering and Biosciences, Department of Bioengineering, Instituto Superior Técnico, Lisbon 1049-001, Portugal
| |
Collapse
|
9
|
Bennett RK, Gonzalez JE, Whitaker WB, Antoniewicz MR, Papoutsakis ET. Expression of heterologous non-oxidative pentose phosphate pathway from Bacillus methanolicus and phosphoglucose isomerase deletion improves methanol assimilation and metabolite production by a synthetic Escherichia coli methylotroph. Metab Eng 2017; 45:75-85. [PMID: 29203223 DOI: 10.1016/j.ymben.2017.11.016] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 10/02/2017] [Accepted: 11/29/2017] [Indexed: 11/30/2022]
Abstract
Synthetic methylotrophy aims to develop non-native methylotrophic microorganisms to utilize methane or methanol to produce chemicals and biofuels. We report two complimentary strategies to further engineer a previously engineered methylotrophic E. coli strain for improved methanol utilization. First, we demonstrate improved methanol assimilation in the presence of small amounts of yeast extract by expressing the non-oxidative pentose phosphate pathway (PPP) from Bacillus methanolicus. Second, we demonstrate improved co-utilization of methanol and glucose by deleting the phosphoglucose isomerase gene (pgi), which rerouted glucose carbon flux through the oxidative PPP. Both strategies led to significant improvements in methanol assimilation as determined by 13C-labeling in intracellular metabolites. Introduction of an acetone-formation pathway in the pgi-deficient methylotrophic E. coli strain led to improved methanol utilization and acetone titers during glucose fed-batch fermentation.
Collapse
Affiliation(s)
- R Kyle Bennett
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, USA; The Delaware Biotechnology Institute, Molecular Biotechnology Laboratory, University of Delaware, 15 Innovation Way, Newark, DE 19711, USA.
| | - Jacqueline E Gonzalez
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, USA.
| | - W Brian Whitaker
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, USA; The Delaware Biotechnology Institute, Molecular Biotechnology Laboratory, University of Delaware, 15 Innovation Way, Newark, DE 19711, USA.
| | - Maciek R Antoniewicz
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, USA.
| | - Eleftherios T Papoutsakis
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, USA; The Delaware Biotechnology Institute, Molecular Biotechnology Laboratory, University of Delaware, 15 Innovation Way, Newark, DE 19711, USA.
| |
Collapse
|
10
|
Lyons BM, McHenry MA, Barrington DS. Insights into evolution in Andean Polystichum (Dryopteridaceae) from expanded understanding of the cytosolic phosphoglucose isomerase gene. Mol Phylogenet Evol 2017; 112:36-46. [PMID: 28411162 DOI: 10.1016/j.ympev.2017.04.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Revised: 03/08/2017] [Accepted: 04/10/2017] [Indexed: 12/19/2022]
Abstract
Cytosolic phosphoglucose isomerase (pgiC) is an enzyme essential to glycolysis found universally in eukaryotes, but broad understanding of variation in the gene coding for pgiC is lacking for ferns. We used a substantially expanded representation of the gene for Andean species of the fern genus Polystichum to characterize pgiC in ferns relative to angiosperms, insects, and an amoebozoan; assess the impact of selection versus neutral evolutionary processes on pgiC; and explore evolutionary relationships of selected Andean species. The dataset of complete sequences comprised nine accessions representing seven species and one hybrid from the Andes and Serra do Mar. The aligned sequences of the full data set comprised 3376 base pairs (70% of the entire gene) including 17 exons and 15 introns from two central areas of the gene. The exons are highly conserved relative to angiosperms and retain substantial homology to insect pgiC, but intron length and structure are unique to the ferns. Average intron size is similar to angiosperms; intron number and location in insects are unlike those of the plants we considered. The introns included an array of indels and, in intron 7, an extensive microsatellite array with potential utility in analyzing population-level histories. Bayesian and maximum-parsimony analysis of 129 variable nucleotides in the Andean polystichums revealed that 59 (1.7% of the 3376 total) were phylogenetically informative; most of these united sister accessions. The phylogenetic trees for the Andean polystichums were incongruent with previously published cpDNA trees for the same taxa, likely the result of rapid evolutionary change in the introns and contrasting stability in the exons. The exons code a total of seven amino-acid substitutions. Comparison of non-synonymous to synonymous substitutions did not suggest that the pgiC gene is under selection in the Andes. Variation in pgiC including two additional accessions represented by incomplete sequences provided new insights into reticulate relationships among Andean taxa.
Collapse
|
11
|
Wang C, Zhou Z, Cai H, Chen Z, Xu H. Redirecting carbon flux through pgi-deficient and heterologous transhydrogenase toward efficient succinate production in Corynebacterium glutamicum. J Ind Microbiol Biotechnol 2017; 44:1115-1126. [PMID: 28303352 DOI: 10.1007/s10295-017-1933-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 03/01/2017] [Indexed: 11/24/2022]
Abstract
Corynebacterium glutamicum is particularly known for its potentiality in succinate production. We engineered C. glutamicum for the production of succinate. To enhance C3-C4 carboxylation efficiency, chromosomal integration of the pyruvate carboxylase gene pyc resulted in strain NC-4. To increase intracellular NADH pools, the pntAB gene from Escherichia coli, encoding for transhydrogenase, was chromosomally integrated into NC-4, leading to strain NC-5. Furthermore, we deleted pgi gene in strain NC-5 to redirect carbon flux to the pentose phosphate pathway (PPP). To solve the drastic reduction of PTS-mediated glucose uptake, the ptsG gene from C. glutamicum, encoding for the glucose-specific transporter, was chromosomally integrated into pgi-deficient strain resulted in strain NC-6. In anaerobic batch fermentation, the production of succinate in pntAB-overexpressing strain NC-5 increased by 14% and a product yield of 1.22 mol/mol was obtained. In anaerobic fed-batch process, succinic acid concentration reached 856 mM by NC-6. The yields of succinate from glucose were 1.37 mol/mol accompanied by a very low level of by-products. Activating PPP and transhydrogenase in combination led to a succinate yield of 1.37 mol/mol, suggesting that they exhibited a synergistic effect for improving succinate yield.
Collapse
Affiliation(s)
- Chen Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Zhihui Zhou
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Heng Cai
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, China.
| | - Zhongjun Chen
- College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, 010018, China
| | - Hongtao Xu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, China.,College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, 010018, China
| |
Collapse
|
12
|
Patel MJ, Patel AT, Akhani R, Dedania S, Patel DH. Bioproduction of D-Tagatose from D-Galactose Using Phosphoglucose Isomerase from Pseudomonas aeruginosa PAO1. Appl Biochem Biotechnol 2016; 179:715-27. [PMID: 26922727 DOI: 10.1007/s12010-016-2026-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 02/18/2016] [Indexed: 10/22/2022]
Abstract
Pseudomonas aeruginosa PAO1 phosphoglucose isomerase was purified as an active soluble form by a single-step purification using Ni-NTA chromatography that showed homogeneity on SDS-PAGE with molecular mass ∼62 kDa. The optimum temperature and pH for the maximum isomerization activity with D-galactose were 60 °C and 7.0, respectively. Generally, sugar phosphate isomerases show metal-independent activity but PA-PGI exhibited metal-dependent isomerization activity with aldosugars and optimally catalyzed the D-galactose isomerization in the presence of 1.0 mM MnCl2. The apparent Km and Vmax for D-galactose under standardized conditions were calculated to be 1029 mM (±31.30 with S.E.) and 5.95 U/mg (±0.9 with S.E.), respectively. Equilibrium reached after 180 min with production of 567.51 μM D-tagatose from 1000 mM of D-galactose. Though, the bioconversion ratio is low but it can be increased by immobilization and enzyme engineering. Although various L-arabinose isomerases have been characterized for bioproduction of D-tagatose, P. aeruginosa glucose phosphate isomerase is distinguished from the other L-arabinose isomerases by its optimal temperature (60 °C) for D-tagatose production being mesophilic bacteria, making it an alternate choice for bulk production.
Collapse
|
13
|
Lin HY, Liu JH, Cheng KL, Lin JY, Liu NR, Meng M. A novel binding of GTP stabilizes the structure and modulates the activities of human phosphoglucose isomerase/autocrine motility factor. Biochem Biophys Rep 2015; 2:14-22. [PMID: 29124141 PMCID: PMC5668625 DOI: 10.1016/j.bbrep.2015.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 04/13/2015] [Accepted: 04/13/2015] [Indexed: 11/29/2022] Open
Abstract
Phosphoglucose isomerase (PGI) catalyzes the interconversion between glucose 6-phosphate and fructose 6-phosphate in the glycolysis pathway. In mammals, the enzyme is also identical to the extracellular proteins neuroleukin, tumor-secreted autocrine motility factor (AMF) and differentiation and maturation mediator for myeloid leukemia. Hereditary deficiency of the enzyme causes non-spherocytic hemolytic anemia in human. In the present study, a novel interaction between GTP and human PGI was corroborated by UV-induced crosslinking, affinity purification and kinetic study. GTP not only inhibits the isomerization activity but also compromises the AMF function of the enzyme. Kinetic studies, including the Yonetani-Theorell method, suggest that GTP is a competitive inhibitor with a Ki value of 63 μM and the GTP-binding site partially overlaps with the catalytic site. In addition, GTP stabilizes the structure of human PGI against heat- and detergent-induced denaturation. Molecular modelling and dynamic simulation suggest that GTP is bound in a syn-conformation with the γ-phosphate group located near the phosphate-binding loop and the ribose moiety positioned away from the active-site residues.
Collapse
Affiliation(s)
- Hua-Yang Lin
- Graduate Institute of Biotechnology, National Chung Hsing University (NCHU), 250 Kuo-Kuang Road, Taichung, Taiwan 40227
| | - Jyung-Hurng Liu
- Graduate Institute of Genomics and Bioinformatics, NCHU, Taichung, Taiwan 40227.,Agricultural Biotechnology Center (ABC), NCHU, Taichung, Taiwan 40227.,Rong Hsing Research Center for Translational Medicine, NCHU, Taichung, Taiwan 40227
| | - Ka-Lik Cheng
- Graduate Institute of Biotechnology, National Chung Hsing University (NCHU), 250 Kuo-Kuang Road, Taichung, Taiwan 40227
| | - Jia-Yun Lin
- Graduate Institute of Biotechnology, National Chung Hsing University (NCHU), 250 Kuo-Kuang Road, Taichung, Taiwan 40227
| | - Ni-Rung Liu
- Graduate Institute of Biotechnology, National Chung Hsing University (NCHU), 250 Kuo-Kuang Road, Taichung, Taiwan 40227
| | - Menghsiao Meng
- Graduate Institute of Biotechnology, National Chung Hsing University (NCHU), 250 Kuo-Kuang Road, Taichung, Taiwan 40227
| |
Collapse
|