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Tanambell H, Danielsen M, Devold TG, Møller AH, Dalsgaard TK. In vitro protein digestibility of RuBisCO from alfalfa obtained from different processing histories: Insights from free N-terminal and mass spectrometry study. Food Chem 2024; 434:137301. [PMID: 37734151 DOI: 10.1016/j.foodchem.2023.137301] [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: 05/31/2023] [Revised: 08/17/2023] [Accepted: 08/25/2023] [Indexed: 09/23/2023]
Abstract
Ribulose-1,5-bisphosphate-carboxylase/oxygenase (RuBisCO) from alfalfa is a potentially climate-friendly alternative protein with a promising amino acid composition. The balance between yield and purity is a challenge for alternative plant proteins, partly due to the naturally occurring antinutrients. Therefore, measuring the in vitro protein digestibility (IVPD) of RuBisCO with various purity levels is of interest. It was hypothesized that the digestibility of RuBisCO from alfalfa might vary with different processing histories and levels of refinement. To test this hypothesis, RuBisCO from alfalfa with 4 different processing histories were subjected to the INFOGEST IVPD protocol and measurement of free N-terminals and peptidomics. The result showed that the digestibility of RuBisCO was high regardless of the processing history and purity, as demonstrated by 77-99% sequence coverage in the gastric phase. In intestinal phase, increase of free N-terminals and lower sequence coverage (< 10%) indicated that the proteins were hydrolyzed to smaller peptides.
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Affiliation(s)
- Hartono Tanambell
- Department of Food Science, Faculty of Technical Sciences, Aarhus University, Agro Food Park 48, 8200 Aarhus N, Denmark; CiFOOD Aarhus University Centre for Innovative Food Research, Aarhus University, Agro Food Park 48, 8200 Aarhus N, Denmark
| | - Marianne Danielsen
- Department of Food Science, Faculty of Technical Sciences, Aarhus University, Agro Food Park 48, 8200 Aarhus N, Denmark; CBIO Aarhus University Centre for Circular Bioeconomy, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
| | - Tove Gulbrandsen Devold
- Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences, 1433 Ås, Norway
| | - Anders Hauer Møller
- Department of Food Science, Faculty of Technical Sciences, Aarhus University, Agro Food Park 48, 8200 Aarhus N, Denmark; CiFOOD Aarhus University Centre for Innovative Food Research, Aarhus University, Agro Food Park 48, 8200 Aarhus N, Denmark; CBIO Aarhus University Centre for Circular Bioeconomy, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
| | - Trine Kastrup Dalsgaard
- Department of Food Science, Faculty of Technical Sciences, Aarhus University, Agro Food Park 48, 8200 Aarhus N, Denmark; CiFOOD Aarhus University Centre for Innovative Food Research, Aarhus University, Agro Food Park 48, 8200 Aarhus N, Denmark; CBIO Aarhus University Centre for Circular Bioeconomy, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark.
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Badaczewska-Dawid AE, Khramushin A, Kolinski A, Schueler-Furman O, Kmiecik S. Protocols for All-Atom Reconstruction and High-Resolution Refinement of Protein-Peptide Complex Structures. Methods Mol Biol 2020; 2165:273-87. [PMID: 32621231 DOI: 10.1007/978-1-0716-0708-4_16] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Structural characterizations of protein-peptide complexes may require further improvements. These may include reconstruction of missing atoms and/or structure optimization leading to higher accuracy models. In this work, we describe a workflow that generates accurate structural models of peptide-protein complexes starting from protein-peptide models in C-alpha representation generated using CABS-dock molecular docking. First, protein-peptide models are reconstructed from their C-alpha traces to all-atom representation using MODELLER. Next, they are refined using Rosetta FlexPepDock. The described workflow allows for reliable all-atom reconstruction of CABS-dock models and their further improvement to high-resolution models.
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Abstract
The Schrödinger software suite contains a broad array of computational chemistry and molecular modeling tools that can be used to study the interaction of peptides with proteins. These include molecular docking using Glide and Piper, relative binding free energy predictions with FEP+, conformational searches using MacroModel and Desmond, and structural refinement using Prime and PrimeX. In this review we provide a comprehensive overview of these tools and describe their potential application in the identification and optimization of peptide ligands for proteins.
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Affiliation(s)
- Jas Bhachoo
- Schrödinger, Inc., 120 West 45th Street, 17th Floor, New York, NY, 10036, USA
| | - Thijs Beuming
- Schrödinger, Inc., 120 West 45th Street, 17th Floor, New York, NY, 10036, USA.
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