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Song R, Jiang C, Zhu J, Liu J, Zhang L, Zuo J, Zheng W, Liu S, Huang Q, Wei X, Chen Y. Expression of Ice Nucleation Protein in Bacillus amyloliquefaciens and Its Application in Food Freezing Process. Foods 2023; 12:3896. [PMID: 37959016 PMCID: PMC10650300 DOI: 10.3390/foods12213896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/20/2023] [Accepted: 10/22/2023] [Indexed: 11/15/2023] Open
Abstract
To produce food-grade ice nucleators, a 3.77 kb ice nucleation gene (iceE) isolated from Pantoea agglomerans (Erwinia herbicola) was introduced into the Gram-positive microorganism Bacillus amyloliquefaciens for the first time. The differential scanning calorimetry (DSC) results indicated that recombined strain B9-INP was an effective ice nucleator for controlling the supercooling point of distilled water at low concentrations. In the presence of B9-INP cells, model food systems, including sucrose solution and sodium chloride solution, different pH solutions froze at a relatively high subzero temperature, thus increasing the supercooling point by 5.8~16.7 °C. Moreover, B9-INP also facilitated model and real food systems to freeze at -6 °C. This recombinant strain not only improved the freezing temperature of food systems but also shortened the total freezing time, thus saving energy and reducing consumption. The results suggest that B9-INP has great application potential in the frozen food industry.
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Affiliation(s)
- Rong Song
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Wuhan 430070, China; (R.S.); (C.J.); (J.Z.); (W.Z.); (S.L.); (X.W.)
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Cong Jiang
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Wuhan 430070, China; (R.S.); (C.J.); (J.Z.); (W.Z.); (S.L.); (X.W.)
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jing Zhu
- Hubei Institute of Measurement and Testing Technology, Wuhan 430070, China;
| | - Jia Liu
- College of Life Science, Yangtze University, Jingzhou 434023, China;
| | - Li Zhang
- Department of Food Science, Rutgers University, New Brunswick, NJ 08901, USA; (L.Z.); (Q.H.)
| | - Jingnan Zuo
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Wuhan 430070, China; (R.S.); (C.J.); (J.Z.); (W.Z.); (S.L.); (X.W.)
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Wei Zheng
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Wuhan 430070, China; (R.S.); (C.J.); (J.Z.); (W.Z.); (S.L.); (X.W.)
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Shilin Liu
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Wuhan 430070, China; (R.S.); (C.J.); (J.Z.); (W.Z.); (S.L.); (X.W.)
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Qingrong Huang
- Department of Food Science, Rutgers University, New Brunswick, NJ 08901, USA; (L.Z.); (Q.H.)
| | - Xuetuan Wei
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Wuhan 430070, China; (R.S.); (C.J.); (J.Z.); (W.Z.); (S.L.); (X.W.)
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yijie Chen
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Wuhan 430070, China; (R.S.); (C.J.); (J.Z.); (W.Z.); (S.L.); (X.W.)
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
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Effect of active ice nucleation bacteria on freezing and the properties of surimi during frozen storage. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Jin J, Yurkow EJ, Adler D, Lee TC. A Novel Approach To Improve the Efficiency of Block Freeze Concentration Using Ice Nucleation Proteins with Altered Ice Morphology. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:2373-2382. [PMID: 28241114 DOI: 10.1021/acs.jafc.6b03710] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Freeze concentration is a separation process with high success in product quality. The remaining challenge is to achieve high efficiency with low cost. This study aims to evaluate the potential of using ice nucleation proteins (INPs) as an effective method to improve the efficiency of block freeze concentration while also exploring the related mechanism of ice morphology. Our results show that INPs are able to significantly improve the efficiency of block freeze concentration in a desalination model. Using this experimental system, we estimate that approximately 50% of the energy cost can be saved by the inclusion of INPs in desalination cycles while still meeting the EPA standard of drinking water (<500 ppm). Our investigative tools for ice morphology include optical microscopy and X-ray computed tomography imaging analysis. Their use indicates that INPs promote the development of a lamellar structured ice matrix with larger hydraulic diameters, which facilitates brine drainage and contains less brine entrapment as compared to control samples. These results suggest great potential for applying INPs to develop an energy-saving freeze concentration method via the alteration of ice morphology.
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Affiliation(s)
- Jue Jin
- Department of Food Science, Rutgers, the State University of New Jersey , 65 Dudley Road, New Brunswick, New Jersey 08901, United States
| | - Edward J Yurkow
- Molecular Imaging Center, Rutgers Translational Sciences, Rutgers, the State University of New Jersey , 41 Gordon Road, Suite D, Piscataway, New Jersey 08854, United States
| | - Derek Adler
- Molecular Imaging Center, Rutgers Translational Sciences, Rutgers, the State University of New Jersey , 41 Gordon Road, Suite D, Piscataway, New Jersey 08854, United States
| | - Tung-Ching Lee
- Department of Food Science, Rutgers, the State University of New Jersey , 65 Dudley Road, New Brunswick, New Jersey 08901, United States
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Expression and localization of an ice nucleating protein from a soil bacterium, Pseudomonas borealis. Cryobiology 2014; 69:110-8. [PMID: 24930584 DOI: 10.1016/j.cryobiol.2014.06.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 06/02/2014] [Accepted: 06/04/2014] [Indexed: 11/20/2022]
Abstract
An ice nucleating protein (INP) coding region with 66% sequence identity to the INP of Pseudomonas syringae was previously cloned from P. borealis, a plant beneficial soil bacterium. Ice nucleating activity (INA) in the P. borealis DL7 strain was highest after transfer of cultures to temperatures just above freezing. The corresponding INP coding sequence (inaPb or ina) was used to construct recombinant plasmids, with recombinant expression visualized using a green fluorescent protein marker (gfp encoding GFP). Although the P. borealis strain was originally isolated by ice-affinity, bacterial cultures with membrane-associated INP-GFP did not adsorb to pre-formed ice. Employment of a shuttle vector allowed expression of ina-gfp in both Escherichia coli and Pseudomonas cells. At 27 °C, diffuse fluorescence appeared throughout the cells and was associated with low INA. However, after transfer of cultures to 4 °C, the protein localized to the poles coincident with high INA. Transformants with truncated INP sequences ligated to either gfp, or an antifreeze protein-gfp fusion showed that the repetitive ice-nucleation domain was not necessary for localization. Such localization is consistent with the flanking residues of the INP associating with a temperature-dependent secretion apparatus. A polar location would facilitate INP-INP interactions resulting in the formation of larger aggregates, serving to increase INA. Expression of INPs by P. borealis could function as an efficient atmospheric dispersal mechanism for these soil bacteria, which are less likely to use these proteins for nutrient procurement, as has been suggested for P. syringae.
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Zhou Z, Jin J, Yue T, Lee TC. Optimization of Covalent Immobilization of Extracellular Ice Nucleators from Erwinia herbicola on Magnetic Fe3O4/Chitosan Nanoparticles for Potential Application in Freeze Concentration. FOOD BIOPROCESS TECH 2014. [DOI: 10.1007/s11947-014-1318-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Gezgin Z, Lee TC, Huang Q. Engineering functional nanothin multilayers on food packaging: ice-nucleating polyethylene films. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:5130-5138. [PMID: 23611300 DOI: 10.1021/jf400541q] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Polyethylene is the most prevalent plastic and is commonly used as a packaging material. Despite its common use, there are not many studies on imparting functionalities to those films which can make them more desirable for frozen food packaging. Here, commercial low-density polyethylene (LDPE) films were oxidized by UV-ozone (UVO) treatment to obtain a negatively charged hydrophilic surface to allow fabrication of functional multilayers. An increase in hydrophilicity was observed when films were exposed to UVO for 4 min and longer. Thin multilayers were formed by dipping the UVO-treated films into biopolymer solutions, and extracellular ice nucleators (ECINs) were immobilized onto the film surface to form a functional top layer. Polyelectrolyte adsorption was studied and confirmed on silicon wafers by measuring the water contact angles of the layers and investigating the surface morphology via atomic force microscopy. An up to 4-5 °C increase in ice nucleation temperatures and an up to 10 min decrease in freezing times were observed with high-purity deionized water samples frozen in ECIN-coated LDPE films. Films retained their ice nucleation activity up to 50 freeze-thaw cycles. Our results demonstrate the potential of using ECIN-coated polymer films for frozen food application.
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Affiliation(s)
- Zafer Gezgin
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, New Jersey 08901-8520, USA
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Shi K, Yu H, Jin J, Lee TC. Improvement to baking quality of frozen bread dough by novel zein-based ice nucleation films. J Cereal Sci 2013. [DOI: 10.1016/j.jcs.2013.01.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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