PMID- 30884710 OWN - NLM STAT- MEDLINE DCOM- 20200615 LR - 20200615 IS - 1873-7145 (Electronic) IS - 0963-9969 (Linking) VI - 119 DP - 2019 May TI - Structural characterization of a tetrapeptide from Sesame flavor-type Baijiu and its interactions with aroma compounds. PG - 733-740 LID - S0963-9969(18)30847-0 [pii] LID - 10.1016/j.foodres.2018.10.055 [doi] AB - The small molecules in Chinese Baijiu have been widely reported, but there is little information on peptides since their low concentrations. A tetrapeptide, Asp-Arg-Ala-Arg (DRAR), was newly identified from Jingzhi Sesame flavor-type Baijiu (SFTB) by high-performance liquid chromatography and quadrupole-time-of-flight-mass spectrometry (HPLC-Q-TOF-MS) with a concentration of 13.159 +/- 0.202 mug/L (P > 0.05). Interactions between DRAR and volatile compounds were characterized using headspace solid-phase micro-extraction coupled with gas chromatography-mass spectrometry (HS-SPME-GC-MS), and the results indicated that DRAR could suppress the volatility of aroma compounds by 0.09-39.02 %, especially with respect to esters and alcohols. The involved binding modes of DRAR with esters or alcohols in 46% ethanol/water solutions (v/v) were respectively determined by ultraviolet (UV) absorption spectroscopy. According to the Van't Hoff equation, the thermodynamic parameters (for DRAR - esters complex, DeltaH = -34.7 KJ mol(-1), DeltaS = -66.4 J mol(-1) K(-1) and for DRAR - alcohols complex, DeltaH = -40.8 KJ mol(-1), DeltaS = -91.8 J mol(-1) K(-1)) indicated that hydrogen bonds and van der Waals forces played major roles in stabilizing the DRAR-esters and DRAR-alcohols complexes. This study will help us to further understand the interaction mechanisms between aroma compounds and peptides, and the important role of peptides on the quality of Chinese Baijiu. CI - Copyright (c) 2018 Elsevier Ltd. All rights reserved. FAU - Huang, Mingquan AU - Huang M AD - Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing 100048, China. FAU - Huo, Jiaying AU - Huo J AD - Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing 100048, China. FAU - Wu, Jihong AU - Wu J AD - Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing 100048, China. Electronic address: wujihong12@126.com. FAU - Zhao, Mouming AU - Zhao M AD - School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China. FAU - Sun, Jinyun AU - Sun J AD - Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing 100048, China. FAU - Zheng, Fuping AU - Zheng F AD - Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing 100048, China. FAU - Sun, Xiaotao AU - Sun X AD - Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing 100048, China. FAU - Li, Hehe AU - Li H AD - Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing 100048, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20181022 PL - Canada TA - Food Res Int JT - Food research international (Ottawa, Ont.) JID - 9210143 RN - 0 (Esters) RN - 0 (Flavoring Agents) RN - 0 (Peptides) RN - 0 (Plant Extracts) RN - 0 (Volatile Organic Compounds) RN - 059QF0KO0R (Water) RN - 3K9958V90M (Ethanol) SB - IM MH - Esters/analysis MH - Ethanol MH - Flavoring Agents/*analysis MH - Gas Chromatography-Mass Spectrometry MH - Hydrogen Bonding MH - Mass Spectrometry MH - Odorants/*analysis MH - Peptides/*analysis MH - Plant Extracts/*analysis MH - Sesamum/*chemistry MH - Solid Phase Microextraction MH - Volatile Organic Compounds/analysis MH - Volatilization MH - Water OTO - NOTNLM OT - Binding mode OT - Chinese Sesame flavor-type Baijiu OT - HPLC-Q-TOF-MS OT - Interaction OT - Peptides EDAT- 2019/03/20 06:00 MHDA- 2020/06/17 06:00 CRDT- 2019/03/20 06:00 PHST- 2018/07/25 00:00 [received] PHST- 2018/10/17 00:00 [revised] PHST- 2018/10/19 00:00 [accepted] PHST- 2019/03/20 06:00 [entrez] PHST- 2019/03/20 06:00 [pubmed] PHST- 2020/06/17 06:00 [medline] AID - S0963-9969(18)30847-0 [pii] AID - 10.1016/j.foodres.2018.10.055 [doi] PST - ppublish SO - Food Res Int. 2019 May;119:733-740. doi: 10.1016/j.foodres.2018.10.055. Epub 2018 Oct 22.