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Yin SJ, Lee HY, Wang W, Lee J, Park YD. Characterization and activity-folding relationship of serine protease from Antarctic krill ( Euphausia superba). J Biomol Struct Dyn 2022:1-14. [PMID: 35612882 DOI: 10.1080/07391102.2022.2080115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Euphausia superba (Antarctic krill) serine protease (ESP) was investigated to gain insights into the activity-structural relationship, folding behavior, and regulation of the catalytic function. We purified ESP from the krill muscle and characterized biochemical distinctions via enzyme kinetics. Studies of inhibition kinetics and unfolding in the presence of a serine residue modifier, such as phenylmethanesulfonyl fluoride, were conducted. Structural characterizations were measured by spectrofluorimetry, including 1-anilinonaphthalene-8-sulfonate dye labeling for hydrophobic residues. The computational simulations such as docking and molecular dynamics were finally conducted to detect key residues and folding behaviors in a nano-second range. The kinetic parameters of ESP were measured as KmBANH = 0.97 ± 0.15 mM and kcat/KmBANH = 4.59 s-1/mM. The time-interval kinetics measurements indicated that ESP inactivation was transformed from a monophase to a biphase process to form a thermodynamically stable state. Spectrofluorimetry measurements showed that serine is directly connected to the regional folding of ESP. Several osmolytes such as proline and glycine only partially protected the inactive form of ESP by serine modification. Computational molecular dynamics and docking simulations showed that three serine residues (Ser183, Ser188, and Ser207) and Cys184, Val206, and Gly209 are key residues of catalytic functions. Our study revealed the functional roles of serine residues as key residues of catalytic function at the active site and of the structural conformation as key folding factors, where ESP displays a flexible property of active site pocket compared to the overall structure.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Shang-Jun Yin
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang, P. R. China
| | - Ho-Yeon Lee
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Korea.,Department of Bioinformatics, KRIBB school of Bioscience, University of Science and Technology (UST), Daejeon, Korea
| | - Wei Wang
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang, P. R. China
| | - Jinhyuk Lee
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Korea.,Department of Bioinformatics, KRIBB school of Bioscience, University of Science and Technology (UST), Daejeon, Korea
| | - Yong-Doo Park
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang, P. R. China.,Skin Diseases Research Center, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, P.R. China.,Zhejiang Provincial Key Laboratory of Applied Enzymology, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, P.R. China
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Qian GY, Lim G, Yin SJ, Yang JM, Lee J, Park YD. Biochemical Study of Fibrinolytic Protease from Euphausia superba Possessing Multifunctional Serine Protease Activity. Protein Pept Lett 2021; 28:651-664. [PMID: 33183186 DOI: 10.2174/0929866527666201112123714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 09/27/2020] [Accepted: 10/02/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Fibrinolytic protease from Euphausia superba (EFP) was isolated. OBJECTIVE Biochemical distinctions, regulation of the catalytic function, and the key residues of EFP were investigated. METHODS The serial inhibition kinetic evaluations coupled with measurements of fluorescence spectra in the presence of 4-(2-aminoethyl) benzene sulfonyl fluoride hydrochloride (AEBSF) was conducted. The computational molecular dynamics (MD) simulations were also applied for a comparative study. RESULTS The enzyme behaved as a monomeric protein with a molecular mass of about 28.6 kD with Km BApNA = 0.629 ± 0.02 mM and kcat/Km BApNA = 7.08 s-1/mM. The real-time interval measurements revealed that the inactivation was a first-order reaction, with the kinetic processes shifting from a monophase to a biphase. Measurements of fluorescence spectra showed that serine residue modification by AEBSF directly caused conspicuous changes of the tertiary structures and exposed hydrophobic surfaces. Some osmolytes were applied to find protective roles. These results confirmed that the active region of EFP is more flexible than the overall enzyme molecule and serine, as the key residue, is associated with the regional unfolding of EFP in addition to its catalytic role. The MD simulations were supportive to the kinetics data. CONCLUSION Our study indicated that EFP has an essential serine residue for its catalyst function and associated folding behaviors. Also, the functional role of osmolytes such as proline and glycine that may play a role in defense mechanisms from environmental adaptation in a krill's body was suggested.
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Affiliation(s)
- Guo-Ying Qian
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
| | - Gyutae Lim
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Gwahak-ro, Yuseonggu, Daejeon, 34141, Korea
| | - Shang-Jun Yin
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
| | - Jun-Mo Yang
- Department of Dermatology, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul 135-710, Korea
| | - Jinhyuk Lee
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Gwahak-ro, Yuseonggu, Daejeon, 34141, Korea
| | - Yong-Doo Park
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
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Folding perspectives of an intrinsically disordered transactivation domain and its single mutation breaking the folding propensity. Int J Biol Macromol 2019; 155:1359-1372. [PMID: 31733244 DOI: 10.1016/j.ijbiomac.2019.11.111] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 11/01/2019] [Accepted: 11/12/2019] [Indexed: 12/23/2022]
Abstract
Transcriptional regulation is a critical facet of cellular development controlled by numerous transcription factors, among which are E-proteins (E2A, HEB, and E2-2) that play important roles in lymphopoiesis. For example, primary hematopoietic cells immortalisation is promoted by interaction of the conserved PCET motif consisting of the Leu-X-X-Leu-Leu (LXXLL) and Leu-Asp-Phe-Ser (LDFS) sequences of the transactivation domains (AD1) of E-proteins with the KIX domain of CBP/p300 transcriptional co-activators. Earlier, it was shown that the LXXLL motif is essential for the PCET-KIX interaction driven by the PCET helical transition. In this study, we analyzed the dehydration-driven gain of helicity in the conserved region (residues 11-28) of the AD1 domain of E-protein. Particularly, we showed that AD1 structure was dramatically affected by alcohols, but was insensitive to changes in pH or the presence of osmolytes sarcosine and taurine, or high polyethylene glycol (PEG) concentrations and DOPC Liposomes. These structure-forming effects of solvents were almost completely absent in the case of L21P AD1 mutant characterized by weakened interaction with KIX. This indicates that KIX interaction-induced AD1 ordering is driven by PCET motif dehydration. The L21P mutation-caused loss of molecular recognition function of AD1 is due to the mutation-induced disruption of the AD1 helical propensity.
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Wang W, Ohtake S. Science and art of protein formulation development. Int J Pharm 2019; 568:118505. [PMID: 31306712 DOI: 10.1016/j.ijpharm.2019.118505] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 07/08/2019] [Accepted: 07/08/2019] [Indexed: 02/07/2023]
Abstract
Protein pharmaceuticals have become a significant class of marketed drug products and are expected to grow steadily over the next decade. Development of a commercial protein product is, however, a rather complex process. A critical step in this process is formulation development, enabling the final product configuration. A number of challenges still exist in the formulation development process. This review is intended to discuss these challenges, to illustrate the basic formulation development processes, and to compare the options and strategies in practical formulation development.
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Affiliation(s)
- Wei Wang
- Biological Development, Bayer USA, LLC, 800 Dwight Way, Berkeley, CA 94710, United States.
| | - Satoshi Ohtake
- Pharmaceutical Research and Development, Pfizer Biotherapeutics Pharmaceutical Sciences, Chesterfield, MO 63017, United States
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Arumugam V, Rajamanikandan R, Ilanchelian M, Moodley KG, Redhi GG. Investigation of binding interactions between BSA and [EPMpyr][Sal] through spectroscopy studies, thermophysical and thermodynamic properties. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 210:299-307. [PMID: 30471538 DOI: 10.1016/j.saa.2018.11.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 10/29/2018] [Accepted: 11/12/2018] [Indexed: 06/09/2023]
Abstract
The intensity of research, probing the interactions between proteins and ionic liquid (IL), has been increasing and parallels the fast-growing applications of ILs in biotechnology. The specific aspects which have attracted the involvement of researchers are stabilization, separation, biochemical and enzymatic reactions of proteins. In this work the synthesis of IL, epoxypropyl and N-methyl substituted 2‑oxopyrrolidinium cation with salicylate anion, [EPMpyr][Sal], and its interaction with aqueous BSA{BSA(aq)-[EPMpyr][Sal]}. Measurements of thermophysical properties (density (ρ), and speed of sound (u)) showed that both moderately strong and weak interactions occur on treatment of BSA with that chosen IL. H-bond formation, dipole-dipole interactions and ionic interactions occurring in this system were investigated via thermophysical and thermodynamic properties as well as spectroscopic data. Thermodynamic data (excess molar volume (VmE), isentropic compressibility (ks), deviation in isentropic compressibility (∆ks) and intermolecular free length (Lf)) showed that there were stronger interaction between IL and BSA at higher temperature. The data from all the studies were correlated with Redlich Kister polynomial equation. The blue shift observed in the fluorescent spectra was interpreted to indicate that thetryptophan (Trp) residue of BSA moves to a more hydrophobic environment. It was also observed that the addition of more IL to BSA resulted in denaturation of BSA due to high hydrophobic nature of IL. Circular dichroism studies show that there were significant changes in the fine structure of BSA on interaction with IL. From the FTIR spectra the position of H-bond in the secondary structure of BSA was deduced.
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Affiliation(s)
| | - Ramar Rajamanikandan
- Department of Chemistry, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India
| | | | | | - Gan G Redhi
- Department of Chemistry, Durban University of Technology, South Africa.
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6
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Petkowski JJ, Bains W, Seager S. Natural Products Containing 'Rare' Organophosphorus Functional Groups. Molecules 2019; 24:E866. [PMID: 30823503 PMCID: PMC6429109 DOI: 10.3390/molecules24050866] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 02/13/2019] [Accepted: 02/22/2019] [Indexed: 12/25/2022] Open
Abstract
Phosphorous-containing molecules are essential constituents of all living cells. While the phosphate functional group is very common in small molecule natural products, nucleic acids, and as chemical modification in protein and peptides, phosphorous can form P⁻N (phosphoramidate), P⁻S (phosphorothioate), and P⁻C (e.g., phosphonate and phosphinate) linkages. While rare, these moieties play critical roles in many processes and in all forms of life. In this review we thoroughly categorize P⁻N, P⁻S, and P⁻C natural organophosphorus compounds. Information on biological source, biological activity, and biosynthesis is included, if known. This review also summarizes the role of phosphorylation on unusual amino acids in proteins (N- and S-phosphorylation) and reviews the natural phosphorothioate (P⁻S) and phosphoramidate (P⁻N) modifications of DNA and nucleotides with an emphasis on their role in the metabolism of the cell. We challenge the commonly held notion that nonphosphate organophosphorus functional groups are an oddity of biochemistry, with no central role in the metabolism of the cell. We postulate that the extent of utilization of some phosphorus groups by life, especially those containing P⁻N bonds, is likely severely underestimated and has been largely overlooked, mainly due to the technological limitations in their detection and analysis.
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Affiliation(s)
- Janusz J Petkowski
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA.
| | - William Bains
- Rufus Scientific, 37 The Moor, Melbourn, Royston, Herts SG8 6ED, UK.
| | - Sara Seager
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA.
- Department of Physics, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA.
- Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA.
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7
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Wang W, Roberts CJ. Protein aggregation – Mechanisms, detection, and control. Int J Pharm 2018; 550:251-268. [DOI: 10.1016/j.ijpharm.2018.08.043] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/18/2018] [Accepted: 08/20/2018] [Indexed: 12/19/2022]
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Shi XY, Zhang LL, Wu F, Fu YY, Yin SJ, Si YX, Park YD. Kinetics for Cu(2+) induced Sepia pharaonis arginine kinase inactivation and aggregation. Int J Biol Macromol 2016; 91:926-33. [PMID: 27318110 DOI: 10.1016/j.ijbiomac.2016.06.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 06/01/2016] [Accepted: 06/14/2016] [Indexed: 12/18/2022]
Abstract
Arginine kinase plays an important role in cellular energy metabolism and is closely related to the environmental stress response in marine invertebrates. We studied the Cu(2+)-mediated inhibition and aggregation of Sepia pharaonis arginine kinase (SPAK) and found that Cu(2+) markedly inhibited the SPAK activity along with mixed-type inhibition against the arginine substrate and noncompetitive inhibition against the ATP cofactor. Spectrofluorimetry results showed that Cu(2+) induced a tertiary structure change in SPAK, resulting in exposure of the hydrophobic surface and increased aggregation. Cu(2+)-mediated SPAK aggregation followed first-order kinetics consistent with monophasic and a biphasic processes. Addition of osmolytes, including glycine and proline, effectively blocked SPAK aggregation and restored SPAK activity. Our results demonstrated the effects of Cu(2+) on SPAK catalytic function, conformation, and aggregation, as well as the protective effects of osmolytes on SPAK folding. This study provided important insights into the role of Cu(2+) as a negative effector of the S. pharaonis metabolic enzyme AK and the possible responses of cephalopods to unfavorable environmental conditions.
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Affiliation(s)
- Xiao-Yu Shi
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, PR China
| | - Li-Li Zhang
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, PR China
| | - Feng Wu
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, PR China
| | - Yang-Yong Fu
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, PR China
| | - Shang-Jun Yin
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, PR China
| | - Yue-Xiu Si
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, PR China.
| | - Yong-Doo Park
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, PR China; Zhejiang Provincial Key Laboratory of Applied Enzymology, Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, PR China.
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9
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Fonin AV, Uversky VN, Kuznetsova IM, Turoverov KK. Protein folding and stability in the presence of osmolytes. Biophysics (Nagoya-shi) 2016. [DOI: 10.1134/s0006350916020056] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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10
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Cai Y, Lee J, Wang W, Yang JM, Qian GY. Effect of Cd2+ on muscle type of creatine kinase: Inhibition kinetics integrating computational simulations. Int J Biol Macromol 2015; 83:233-41. [PMID: 26642840 DOI: 10.1016/j.ijbiomac.2015.11.077] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 11/25/2015] [Accepted: 11/26/2015] [Indexed: 12/24/2022]
Abstract
Creatine kinase (EC 2.7.3.2, CK) plays an important role in cellular energy metabolism and homeostasis by catalyzing the transfer of phosphate between ATP and creatine phosphate. We investigated the effects of Cd2+ on muscle type of creatine kinase from Pelodiscus sinensis (PSCKM). Cd2+ conspicuously inactivated the activity of PSCKM (IC50=0.062 mM) in a first-order kinetic process and exhibited non-competitive inhibition with creatine and ATP. A conformational study showed that Cd2+ induced tertiary structure changes in PSCKM with exposure of hydrophobic surfaces. The addition of osmolytes, such as glycine and proline, partially reactivated the Cd2+-mediated inactive PSCKM. Additionally, molecular dynamics and docking simulations between PSCKM and Cd2+ were conducted to show that Cd2+ blocked the entrance of ATP to the active site, and this result is consistent with the experimental results showing Cd2+-induced inactivation of PSCKM. Our study demonstrates the effect of Cd2+ on PSCKM enzymatic function and unfolding, including the protective effects of osmolytes on PSCKM inactivation. This study provides important insights into the changes in the PSCKM metabolic enzyme of ectothermic animals in response to the environment.
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Affiliation(s)
- Yan Cai
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, 315100, PR China
| | - Jinhyuk Lee
- Korean Bioinformation Center (KOBIC), Korea Research Institute of Bioscience and Biotechnology, Daejeon, 305-806, Republic of Korea; Department of Nanobiotechnology and Bioinformatics, University of Sciences and Technology, Daejeon, 305-350, Republic of Korea
| | - Wei Wang
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, 315100, PR China
| | - Jun-Mo Yang
- Department of Dermatology, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, 135-710, Republic of Korea.
| | - Guo-Ying Qian
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, 315100, PR China.
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Si YX, Lee J, Zhao F, Yin SJ, Park YD, Qian GY, Jiang XM. Effects of cadmium on the cuttlefish Sepia pharaonis’ arginine kinase: unfolding kinetics integrated with computational simulations. J Biomol Struct Dyn 2015; 34:1763-77. [DOI: 10.1080/07391102.2015.1091747] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Yue-Xiu Si
- School of Marine Sciences, Ningbo University, Ningbo 315211, P.R. China
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, P.R. China
| | - Jinhyuk Lee
- Korean Bioinformation Center (KOBIC), Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Korea
- Department of Nanobiotechnology and Bioinformatics, University of Sciences and Technology, Daejeon 305-350, Korea
| | - Feng Zhao
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, P.R. China
| | - Shang-Jun Yin
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, P.R. China
| | - Yong-Doo Park
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, P.R. China
- Zhejiang Provincial Key Laboratory of Applied Enzymology, Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, P.R. China
| | - Guo-Ying Qian
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, P.R. China
| | - Xia-Min Jiang
- School of Marine Sciences, Ningbo University, Ningbo 315211, P.R. China
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The Inhibitory Effects of Cu(2+) on Exopalaemon carinicauda Arginine Kinase via Inhibition Kinetics and Molecular Dynamics Simulations. Appl Biochem Biotechnol 2015; 176:1217-36. [PMID: 25935224 DOI: 10.1007/s12010-015-1641-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Accepted: 04/21/2015] [Indexed: 12/28/2022]
Abstract
We studied the Cu(2+)-mediated inhibition and aggregation of Exopalaemon carinicauda arginine kinase (ECAK). We found that Cu(2+) significantly inactivated ECAK activity and double-reciprocal kinetics demonstrated that Cu(2+) induced noncompetitive inhibition of arginine and ATP (IC50 = 2.27 ± 0.16 μM; K i for arginine = 13.53 ± 3.76; K i for ATP = 4.02 ± 0.56). Spectrofluorometry results showed that Cu(2+) induced ECAK tertiary structural changes including the exposure of hydrophobic surfaces that directly induced ECAK aggregation. The addition of osmolytes such as glycine and proline successfully blocked ECAK aggregation induced by Cu(2+) and recovered ECAK activity. We built a 3D structure for ECAK using the ECAK ORF gene sequence. Molecular dynamics (MD) and docking simulations between ECAK and Cu(2+) were conducted to elucidate the binding mechanisms. The results showed that Cu(2+) blocked the entrance to the ATP active site; these results are consistent with the experimental result that Cu(2+) induced ECAK inactivation. Since arginine kinase (AK) plays an important role in cellular energy metabolism in invertebrates, our study can provide new information about the effect of Cu(2+) on ECAK enzymatic function and unfolding, including aggregation, and the protective effects of osmolytes on ECAK folding to better understand the role of the invertebrate ECAK metabolic enzyme in marine environments.
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Si YX, Lee J, Cai Y, Yin SJ, Yang JM, Park YD, Qian GY. Molecular dynamics simulations integrating kinetics for Pb2+-induced arginine kinase inactivation and aggregation. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.02.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Pereira MM, Pedro SN, Quental MV, Lima ÁS, Coutinho JAP, Freire MG. Enhanced extraction of bovine serum albumin with aqueous biphasic systems of phosphonium- and ammonium-based ionic liquids. J Biotechnol 2015; 206:17-25. [PMID: 25865275 DOI: 10.1016/j.jbiotec.2015.03.028] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 03/12/2015] [Accepted: 03/28/2015] [Indexed: 11/16/2022]
Abstract
Novel aqueous biphasic systems (ABS) composed of phosphonium- or ammonium-based ionic liquids (ILs), combined with a buffered aqueous solution of potassium citrate/citric acid (pH=7.0), were investigated for the extraction of proteins. For that purpose, the phase diagrams, tie-lines and tie-line lengths were determined at 25 °C, and the performance of these ABS for the extraction of bovine serum albumin (BSA) was then evaluated. The obtained results reveal that, with the exception of the more hydrophobic ILs, most of the systems investigated allow the complete extraction of BSA for the IL-rich phase in a single-step. These remarkable extraction efficiencies are far superior to those afforded by more conventional extraction systems previously reported. The composition of the biphasic systems, i.e., the amount of phase-forming components, was also investigated aiming at reducing the overall costs of the process without losing efficiency on the protein extraction. It is shown that the extraction efficiencies of BSA are maintained at 100% up to high protein concentrations (at least up to 10 g L(-1)). The recovery of the BSA from the IL-rich phase by dialysis is also shown in addition to the demonstration of the IL recyclability and reusability, at least for 3 times. In the sequential three-step extractions (BSA recovery/IL reusability), the extraction efficiencies of BSA for the IL-rich phase were maintained at 100%. For the improved ABS, the preservation of the protein native conformation was confirmed by Size Exclusion High-Performance Liquid Chromatography (used also as the quantification method) and by Fourier Transform Infra-Red spectroscopy. According to the results herein reported, ABS composed of phosphonium- or ammonium-based ILs and a biodegradable organic salt represent an alternative and remarkable platform for the extraction of BSA and may be extended to other proteins of interest.
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Affiliation(s)
- Matheus M Pereira
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Sónia N Pedro
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Maria V Quental
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Álvaro S Lima
- Programa de Pós-Graduação em Engenharia de Processos, Universidade Tiradentes, Farolândia, CEP 49032-490 Aracaju, SE, Brazil
| | - João A P Coutinho
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Mara G Freire
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
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The effect of Zn2+ on Exopalaemon carinicauda arginine kinase: Computational simulations including unfolding kinetics. Process Biochem 2015. [DOI: 10.1016/j.procbio.2014.12.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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17
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The effect of Cu2+ on arginine kinase from Euphausia superba: A computational simulation integrating unfolding and aggregation studies. Process Biochem 2015. [DOI: 10.1016/j.procbio.2014.12.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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18
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Bruździak P, Adamczak B, Kaczkowska E, Czub J, Stangret J. Are stabilizing osmolytes preferentially excluded from the protein surface? FTIR and MD studies. Phys Chem Chem Phys 2015; 17:23155-64. [DOI: 10.1039/c5cp03065j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Stabilizing osmolytes are not always preferentially excluded and can interact with the protein surface in two ways: indirectly or directly.
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Affiliation(s)
- P. Bruździak
- Department of Physical Chemistry
- Gdansk University of Technology
- 80-233 Gdansk
- Poland
| | - B. Adamczak
- Department of Physical Chemistry
- Gdansk University of Technology
- 80-233 Gdansk
- Poland
| | - E. Kaczkowska
- Department of Physical Chemistry
- Gdansk University of Technology
- 80-233 Gdansk
- Poland
| | - J. Czub
- Department of Physical Chemistry
- Gdansk University of Technology
- 80-233 Gdansk
- Poland
| | - J. Stangret
- Department of Physical Chemistry
- Gdansk University of Technology
- 80-233 Gdansk
- Poland
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A folding study of Antarctic krill (Euphausia superba) alkaline phosphatase using denaturants. Int J Biol Macromol 2014; 70:266-74. [DOI: 10.1016/j.ijbiomac.2014.07.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Revised: 06/08/2014] [Accepted: 07/02/2014] [Indexed: 01/25/2023]
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