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Knight B, Mondal R, Han N, Pietra NF, Hall BA, Edgar KJ, Vaissier Welborn V, Madsen LA, De Yoreo JJ, Dove PM. Kinetics of Calcite Nucleation onto Sulfated Chitosan Derivatives and Implications for Water-Polysaccharide Interactions during Crystallization of Sparingly Soluble Salts. CRYSTAL GROWTH & DESIGN 2024; 24:6338-6353. [PMID: 39131446 PMCID: PMC11311137 DOI: 10.1021/acs.cgd.4c00602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 07/01/2024] [Accepted: 07/02/2024] [Indexed: 08/13/2024]
Abstract
Anionic macromolecules are found at sites of CaCO3 biomineralization in diverse organisms, but their roles in crystallization are not well-understood. We prepared a series of sulfated chitosan derivatives with varied positions and degrees of sulfation, DS(SO3 -), and measured calcite nucleation rate onto these materials. Fitting the classical nucleation theory model to the kinetic data reveals the interfacial free energy of the calcite-polysaccharide-solution system, γnet, is lowest for nonsulfated controls and increases with DS(SO3 -). The kinetic prefactor also increases with DS(SO3 -). Simulations of Ca2+-H2O-chitosan systems show greater water structuring around sulfate groups compared to uncharged substituents, independent of sulfate location. Ca2+-SO3 - interactions are solvent-separated by distances that are inversely correlated with DS(SO3 -) of the polysaccharide. The simulations also predict SO3 - and NH3 + groups affect the solvation waters and HCO3 - ions associated with Ca2+. Integrating the experimental and computational evidence suggests sulfate groups influence nucleation by increasing the difficulty of displacing near-surface water, thereby increasing γnet. By correlating γnet and net charge per monosaccharide for diverse polysaccharides, we suggest the solvent-separated interactions of functional groups with Ca2+ influence thermodynamic and kinetic components to crystallization by similar solvent-dominated processes. The findings reiterate the importance of establishing water structure and properties at macromolecule-solution interfaces.
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Affiliation(s)
- Brenna
M. Knight
- Department
of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Department
of Geosciences, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Ronnie Mondal
- Department
of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules
Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Nizhou Han
- Department
of Geosciences, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Nicholas F. Pietra
- Department
of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules
Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Brady A. Hall
- GlycoMIP, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Kevin J. Edgar
- Department
of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules
Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
- Department
of Sustainable Biomaterials, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Valerie Vaissier Welborn
- Department
of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules
Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Louis A. Madsen
- Department
of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules
Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - James J. De Yoreo
- Physical
Sciences Division, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department
of Materials Science and Engineering, University
of Washington, Seattle, Washington 98195, United States
| | - Patricia M. Dove
- Department
of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Department
of Geosciences, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules
Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
- Department
of Materials Science and Engineering, Virginia
Tech, Blacksburg, Virginia 24061, United States
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Chen H, Jiang B, Zou C, Lou Z, Song J, Wu W, Jin Y. Exploring how lignin structure influences the interaction between carbohydrate-binding module and lignin using AFM. Int J Biol Macromol 2023; 232:123313. [PMID: 36682668 DOI: 10.1016/j.ijbiomac.2023.123313] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/23/2022] [Accepted: 01/13/2023] [Indexed: 01/22/2023]
Abstract
Nonproductive adsorption of cellulase onto the residual lignin in substrate seriously hinders the enzymatic hydrolysis. To understand how lignin structure affects lignin-cellulase interaction, the carbohydrate-binding module (CBM) functionalized atomic force microscope tip was used to measure CBM-lignin interaction by single-molecule dynamic force spectroscopy in this work. The results showed that sulfonated lignin (SL) has the greatest adhesion force to CBM (4.74 nN), while those of masson pine milled wood lignin (MWL), poplar MWL and herbaceous MWLs were 2.85, 1.03 and 0.27-0.61 nN, respectively. It provides direct quantitative evidence for the significance of lignin structure on lignin-cellulase interaction. The CBM-MWLs interaction decreased sharply to 0.054-0.083 nN while SL was added, indicating the primary mechanism of SL promoting lignocellulose hydrolysis was significantly reducing the nonproductive adsorption of substrate lignin on cellulase. Finally, the "competitive adsorption" mechanism was proposed to interpret why SL effectively promotes the enzymatic hydrolysis of lignin-containing substrates.
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Affiliation(s)
- Hui Chen
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China; Joint International Research Lab of Lignocellulosic Functional Materials, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China
| | - Bo Jiang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China; Joint International Research Lab of Lignocellulosic Functional Materials, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China
| | - Chunyang Zou
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Zhichao Lou
- Joint International Research Lab of Lignocellulosic Functional Materials, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China
| | - Junlong Song
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China; Joint International Research Lab of Lignocellulosic Functional Materials, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China
| | - Wenjuan Wu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China.
| | - Yongcan Jin
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China; Joint International Research Lab of Lignocellulosic Functional Materials, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China.
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Immobilization and enzymatic properties of glutamate decarboxylase from Enterococcus faecium by affinity adsorption on regenerated chitin. Amino Acids 2020; 52:1479-1489. [PMID: 33128622 DOI: 10.1007/s00726-020-02906-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 10/21/2020] [Indexed: 10/23/2022]
Abstract
Glutamate decarboxylase (GAD, EC 4.1.1.15) is an important enzyme in gamma-aminobutyric acid biosynthesis and DL-glutamic acid resolution. In this study, the Enterococcus faecium-derived GAD was successfully immobilized by regenerated chitin (RC) via specific adsorption of cellulose-binding domain (CBD). The optimal binding buffer was 20 mmol/L phosphate buffer saline (pH 8.0), and the RC binding capacity was 1.77 ± 0.11 mgcbd-gad/grc under this condition. The ratio of wet RC and crude enzyme solution used for immobilization was recommended to 3:50 (g/mL). To evaluate the effect of RC immobilization on GAD, properties of the immobilize GAD (RC-CBD-GAD) were investigated. Results indicated RC-CBD-GAD was relatively stable at pH 4.4-5.6 and temperature - 20-40 °C, and the optimal reaction pH value and temperature were pH 4.8 and 50 °C, respectively. When it was reacted with 5 mmol/L of follow chemical reagents respectively, the activity of RC-CBD-GAD was hardly affected by EDTA, KCl, and NaCl, and significantly inactivated by AgNO3, MnSO4, MgSO4, CuSO4, ZnSO4, FeCl2, FeCl3, AlCl3, CaCl2, and Pb(CH3COO)2. The apparent Km and Vmax were 28.35 mmol/L and 147.06 μmol/(gRC-CBD-GAD·min), respectively. The optimum time for a batch of catalytic reaction without exogenous pH control was 2 h. Under this reaction time, RC-CBD-GAD had a good reusability with a half-life of 23 cycles, indicating that it was very attractive for GABA industry. As a novel, efficient, and green CBD binding carrier, RC provides an alternative way to protein immobilization.
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Applications of catalyzed cytoplasmic disulfide bond formation. Biochem Soc Trans 2019; 47:1223-1231. [DOI: 10.1042/bst20190088] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 09/09/2019] [Accepted: 09/20/2019] [Indexed: 12/14/2022]
Abstract
Abstract
Disulfide bond formation is an essential post-translational modification required for many proteins to attain their native, functional structure. The formation of disulfide bonds, otherwise known as oxidative protein folding, occurs in the endoplasmic reticulum and mitochondrial inter-membrane space in eukaryotes and the periplasm of prokaryotes. While there are differences in the molecular mechanisms of oxidative folding in different compartments, it can essentially be broken down into two steps, disulfide formation and disulfide isomerization. For both steps, catalysts exist in all compartments where native disulfide bond formation occurs. Due to the importance of disulfide bonds for a plethora of proteins, considerable effort has been made to generate cell factories which can make them more efficiently and cheaper. Recently synthetic biology has been used to transfer catalysts of native disulfide bond formation into the cytoplasm of prokaryotes such as Escherichia coli. While these engineered systems cannot yet rival natural systems in the range and complexity of disulfide-bonded proteins that can be made, a growing range of proteins have been made successfully and yields of homogenously folded eukaryotic proteins exceeding g/l yields have been obtained. This review will briefly give an overview of such systems, the uses reported to date and areas of future potential development, including combining with engineered systems for cytoplasmic glycosylation.
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Griffo A, Rooijakkers BJM, Hähl H, Jacobs K, Linder MB, Laaksonen P. Binding Forces of Cellulose Binding Modules on Cellulosic Nanomaterials. Biomacromolecules 2019; 20:769-777. [PMID: 30657665 PMCID: PMC6727214 DOI: 10.1021/acs.biomac.8b01346] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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In
this study, the interaction forces between different cellulosic
nanomaterials and a protein domain belonging to cellulose binding
modules family 1 (CBM1) were investigated at the molecular scale.
Cellulose binding modules are protein domains found in carbohydrate
active enzymes having an affinity toward cellulosic materials. Here,
the binding force of a fusion protein containing a cellulose binding
module (CBM1) produced recombinantly in E. coli was quantified on different cellulose nanocrystals immobilized on
surfaces. Adhesion of the CBM on cellulose with different degrees
of crystallinity as well as on chitin nanocrystals was examined. This
study was carried out by single molecule force spectroscopy using
an atomic force microscope, which enables the detection of binding
force of individual molecules. The study contains a preliminary quantification
of the interactions at the molecular level that sheds light on the
development of new nanocellulose-based nanocomposites with improved
strength and elasticity.
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Affiliation(s)
- Alessandra Griffo
- Department of Bioproducts and Biosystems , Aalto University , Espoo, FI-00076 Aalto , Finland
| | - Bart J M Rooijakkers
- Department of Bioproducts and Biosystems , Aalto University , Espoo, FI-00076 Aalto , Finland
| | - Hendrik Hähl
- Department of Experimental Physics , Saarland University , Saarbrücken 66123 , Germany
| | - Karin Jacobs
- Department of Experimental Physics , Saarland University , Saarbrücken 66123 , Germany
| | - Markus B Linder
- Department of Bioproducts and Biosystems , Aalto University , Espoo, FI-00076 Aalto , Finland
| | - Päivi Laaksonen
- Department of Bioproducts and Biosystems , Aalto University , Espoo, FI-00076 Aalto , Finland
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