PMID- 36869511 OWN - NLM STAT- MEDLINE DCOM- 20230307 LR - 20230308 IS - 1873-7145 (Electronic) IS - 0963-9969 (Linking) VI - 165 DP - 2023 Mar TI - Effects of dual succinylation and ultrasonication modification on the structural and functional properties of ovalbumin. PG - 112511 LID - S0963-9969(23)00056-X [pii] LID - 10.1016/j.foodres.2023.112511 [doi] AB - In this study, the functional properties of ovalbumin (OVA) were improved through dual modification with succinylation (succinylation degrees of 32.1 % [S1], 74.2 % [S2], and 95.2 % [S3]) and ultrasonication (ultrasonication durations of 5 min [U1], 15 min [U2], and 25 min [U3]), and the changes in protein structures were explored. Results showed that as the succinylation degree was increased, the particle size and surface hydrophobicity of S-OVA decreased by the maximum values of 2.2 and 2.4 times, respectively, causing emulsibility and emulsifying stability to increase by 2.7 and 7.3 times, respectively. After ultrasonic treatment, the particle size of succinylated-ultrasonicated OVA (SU-OVA) had decreased by 3.0-5.1 times relative to that of S-OVA. Moreover, the net negative charge of S3U3-OVA had increased to the maximum value of - 35.6 mV. These changes contributed to the further enhancement in functional indicators. The unfolding of the protein structure and the conformational flexibility of SU-OVA were illustrated and compared with those of S-OVA via protein electrophoresis, circular dichroism spectroscopy, intrinsic fluorescence spectroscopy, and scanning electron microscopy. The dually modified OVA emulsion (S3U3-E) presented small droplets (243.33 nm), reduced viscosity, and weakened gelation behavior that were indicative of even distribution, which was visually proven by confocal laser scanning microscopy images. Furthermore, S3U3-E exhibited favorable stability, a particle size that was almost unchanged, and a low polydispersity index (<0.1) over 21 days of storage at 4 degrees C. The above results demonstrated that succinylation combined with ultrasonic treatment could be an effective dual modification method for enhancing the functional performance of OVA. CI - Copyright (c) 2023 Elsevier Ltd. All rights reserved. FAU - Zhang, Ru-Yi AU - Zhang RY AD - College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, China. FAU - Wang, Yang AU - Wang Y AD - College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, China. FAU - Jiang, Yi AU - Jiang Y AD - College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, China. FAU - Min, Er-Hu AU - Min EH AD - Jiangsu Vocational College of Tourism, Yangzhou 225127, Jiangsu, China. FAU - Rao, Sheng-Qi AU - Rao SQ AD - College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, China; Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou 225127, Jiangsu, China. Electronic address: sqrao@yzu.edu.cn. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230130 PL - Canada TA - Food Res Int JT - Food research international (Ottawa, Ont.) JID - 9210143 RN - 9006-59-1 (Ovalbumin) SB - IM MH - *Ovalbumin MH - Microscopy, Confocal MH - Microscopy, Electron, Scanning MH - Particle Size MH - Spectrometry, Fluorescence OTO - NOTNLM OT - Dual modification OT - Emulsifying properties OT - Ovalbumin OT - Succinylation OT - Ultrasonication COIS- Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2023/03/05 06:00 MHDA- 2023/03/08 06:00 CRDT- 2023/03/04 01:01 PHST- 2022/08/11 00:00 [received] PHST- 2023/01/10 00:00 [revised] PHST- 2023/01/21 00:00 [accepted] PHST- 2023/03/04 01:01 [entrez] PHST- 2023/03/05 06:00 [pubmed] PHST- 2023/03/08 06:00 [medline] AID - S0963-9969(23)00056-X [pii] AID - 10.1016/j.foodres.2023.112511 [doi] PST - ppublish SO - Food Res Int. 2023 Mar;165:112511. doi: 10.1016/j.foodres.2023.112511. Epub 2023 Jan 30.