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Liu S, Cui S, Ying F, Nasar J, Wang Y, Gao Q. Simultaneous improvement of protein concentration and amino acid balance in maize grains by coordination application of nitrogen and sulfur. J Cereal Sci 2021. [DOI: 10.1016/j.jcs.2021.103189] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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da Silva CE, de Oliveira MA, Simas FF, Riegel-Vidotti IC. Physical chemical study of zein and arabinogalactans or glucuronomannans polyelectrolyte complexes and their film-forming properties. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2019.105394] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Castilhos NDB, Sampaio NMFM, da Silva BC, Riegel-Vidotti IC, Grassi MT, Silva BJG. Physical-chemical characteristics and potential use of a novel alginate/zein hydrogel as the sorption phase for polar organic compounds. Carbohydr Polym 2017; 174:507-516. [PMID: 28821098 DOI: 10.1016/j.carbpol.2017.06.079] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 06/12/2017] [Accepted: 06/20/2017] [Indexed: 11/18/2022]
Abstract
A novel alginate based hydrogel was successfully prepared and tested for the solid phase microextraction of medium-to-high polarity compounds, when supported in a polypropylene (PP) fiber. Pure alginate when added onto the surface of the PP fiber, resulted in a significant improvement in the extraction efficiency of the analytes (except for β-estradiol). The alginate hydrogel was modified upon the incorporation of a small amount of zein, a corn protein. Interestingly, the alginate/zein-supported hydrogel was capable of successfully extracting compounds with low partition constant (Kow), such as 17-α-ethinyl estradiol, progesterone and estriol, since the initial water uptake decreased dramatically in this gel, therefore, leaving the alginate hydroxyl groups more available to interact with the polar compounds. In conclusion, this paper presents the preparation of a simple, low cost, reusable, and efficient sorption phase for the extraction of polar compounds with different polarities in aqueous samples, which is a current technological challenge in developing efficient wastewater treatment.
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Affiliation(s)
- Natara D B Castilhos
- Departamento de Química, Universidade Federal do Paraná, C.P. 19081, 81531-980 Curitiba, Brazil
| | - Naiara M F M Sampaio
- Departamento de Química, Universidade Federal do Paraná, C.P. 19081, 81531-980 Curitiba, Brazil
| | - Bruno C da Silva
- Departamento de Química, Universidade Federal do Paraná, C.P. 19081, 81531-980 Curitiba, Brazil
| | - Izabel C Riegel-Vidotti
- Departamento de Química, Universidade Federal do Paraná, C.P. 19081, 81531-980 Curitiba, Brazil
| | - Marco T Grassi
- Departamento de Química, Universidade Federal do Paraná, C.P. 19081, 81531-980 Curitiba, Brazil
| | - Bruno J G Silva
- Departamento de Química, Universidade Federal do Paraná, C.P. 19081, 81531-980 Curitiba, Brazil.
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Yue J, Li C, Zhao Q, Zhu D, Yu J. Seed-specific expression of a lysine-rich protein gene, GhLRP, from cotton significantly increases the lysine content in maize seeds. Int J Mol Sci 2014; 15:5350-65. [PMID: 24681583 PMCID: PMC4013568 DOI: 10.3390/ijms15045350] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Revised: 03/10/2014] [Accepted: 03/13/2014] [Indexed: 11/16/2022] Open
Abstract
Maize seed storage proteins are a major source of human and livestock consumption. However, these proteins have poor nutritional value, because they are deficient in lysine and tryptophan. Much research has been done to elevate the lysine content by reducing zein content or regulating the activities of key enzymes in lysine metabolism. Using the naturally lysine-rich protein genes, sb401 and SBgLR, from potato, we previously increased the lysine and protein contents of maize seeds. Here, we examined another natural lysine-rich protein gene, GhLRP, from cotton, which increased the lysine content of transgenic maize seeds at levels varying from 16.2% to 65.0% relative to the wild-type. The total protein content was not distinctly different, except in the six transgenic lines. The lipid and starch levels did not differ substantially in Gossypium hirsutum L. lysine-rich protein (GhLRP) transgenic kernels when compared to wild-type. The agronomic characteristics of all the transgenic maize were also normal. GhLRP is a high-lysine protein candidate gene for increasing the lysine content of maize. This study provided a valuable model system for improving maize lysine content.
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Affiliation(s)
- Jing Yue
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China.
| | - Cong Li
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China.
| | - Qian Zhao
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China.
| | - Dengyun Zhu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China.
| | - Jingjuan Yu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China.
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Panchapakesan C, Sozer N, Dogan H, Huang Q, Kokini JL. Effect of different fractions of zein on the mechanical and phase properties of zein films at nano-scale. J Cereal Sci 2012. [DOI: 10.1016/j.jcs.2011.11.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Li Y, Xia Q, Shi K, Huang Q. Scaling Behaviors of α-Zein in Acetic Acid Solutions. J Phys Chem B 2011; 115:9695-702. [DOI: 10.1021/jp203476m] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yunqi Li
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, New Jersey 08901, United States
| | - Qiuyang Xia
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, New Jersey 08901, United States
| | - Ke Shi
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, New Jersey 08901, United States
| | - Qingrong Huang
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, New Jersey 08901, United States
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Physiology and pathology of proteostasis in the early secretory compartment. Semin Cell Dev Biol 2010; 21:520-5. [PMID: 20178856 DOI: 10.1016/j.semcdb.2010.02.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2009] [Accepted: 02/15/2010] [Indexed: 10/19/2022]
Abstract
The endoplasmic reticulum (ER), the port of entry for proteins into the secretory pathway, is a multifunctional organelle emerging as a central integrator of numerous signalling pathways. The mechanisms that control proteostasis are integral part of this signalling network, providing cues for morphological and functional cell remodelling, proliferation, inflammation and cell death. The complexity of ER responses is exploited during physiological and pathological tissue development, cell differentiation and lifespan control. This essay outlines some of the mechanisms that link proteostasis within the early secretory compartment to signalling in development and disease.
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Anelli T, Sitia R. Protein quality control in the early secretory pathway. EMBO J 2008; 27:315-27. [PMID: 18216874 DOI: 10.1038/sj.emboj.7601974] [Citation(s) in RCA: 469] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2007] [Accepted: 12/05/2007] [Indexed: 12/16/2022] Open
Abstract
Eukaryotic cells are able to discriminate between native and non-native polypeptides, selectively transporting the former to their final destinations. Secretory proteins are scrutinized at the endoplasmic reticulum (ER)-Golgi interface. Recent findings reveal novel features of the underlying molecular mechanisms, with several chaperone networks cooperating in assisting the maturation of complex proteins and being selectively induced to match changing synthetic demands. 'Public' and 'private' chaperones, some of which enriched in specializes subregions, operate for most or selected substrates, respectively. Moreover, sequential checkpoints are distributed along the early secretory pathway, allowing efficiency and fidelity in protein secretion.
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Affiliation(s)
- Tiziana Anelli
- Department of Functional Genomics and Molecular Biology, Università Vita-Salute San Raffaele Scientific Institute, DiBiT-HSR, Milano, Italy
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Forato LA, Colnago LA, Garratt RC, Lopes MA. Identification of free fatty acids in maize protein bodies and purified alpha zeins by (13)C and (1)H nuclear magnetic resonance. BIOCHIMICA ET BIOPHYSICA ACTA 2000; 1543:106-14. [PMID: 11087946 DOI: 10.1016/s0167-4838(00)00190-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Zeins, the maize storage proteins, are the most abundant proteins in the corn endosperm, and are synthesized on the rough endoplasmatic reticulum and deposited in discrete organelles called protein bodies. Several authors, using circular dichroism and optical rotatory dispersion, have concluded that these proteins have a high alpha-helical content in alcoholic solution. In this work we have studied these proteins, within the protein bodies themselves and after extraction from the corn grains with 70% ethanol, using NMR (nuclear magnetic resonance) spectroscopy. We conclusively demonstrate the presence of free fatty acids within both the protein bodies and also in the alcohol extracted alpha zeins. We present evidence for a direct interaction between the free fatty acids and the alpha zein proteins within the protein body and suggest possible mechanisms by which such an association has arisen during the evolution of the maize endosperm.
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Affiliation(s)
- L A Forato
- Instituto de Quimica de São Carlos, Universidade São Paulo, São Carlos, SP, Brazil
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Abstract
In recent years, plant biotechnology has almost reached maturity. Transgenic plants engineered to be herbicide- or insect-resistant are outcompeting conventional crop plants and pest managing strategies leading to a major rethinking of the chemical industry. Due to worldwide efforts to study genome function, almost any gene of interest is, or will soon be available. Thus, identification of gene function will be the major challenge of the next few years. In combination with established gene-delivery systems and desired promoter and targetting sequences, gene discovery will open a fascinating and new field of crop plant design. Transgenic plants engineered to produce superior polypeptides have already been created and the first examples are entering clinical and industrial trials.
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Affiliation(s)
- K Herbers
- SunGene GmbH and Co. KGaA, Corrensstrasse 3, 06466 Gatersleben, Germany.
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