对氨酸氨基转移酶的功能研究:Urechis unicinctus中关键的乌玛米化合物氨酸的合成酶
Yanqing Ma1, Kai Wang1, Tianya Yang1
1Ministry of Education Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China.
International journal of biological macromolecules
|February 1, 2026
概括
这项研究揭示了氨酸是Urechis unicinctus中关键的乌玛米化合物,由谷氨酸-氨酸转胺酶 (GPT) 活性驱动. 在 GPT 中,GPT 必须是 GPT.
科学领域:
- 食品科学 食品科学 食品科学
- 海洋生物学 海洋生物学
- 生物化学 生物化学
背景情况:
- 乌玛米的味道受自由氨基酸 (FAA),有机酸和无机离子的影响.
- 乌雷希斯 (Urechis unicinctus) 是因为其独特的味道和营养价值而受到重视.
- 了解海鲜中乌玛米的分子基础对于风味研究至关重要.
研究的目的:
- 为了研究Urechis unicinctus的乌玛米味道背后的分子机制.
- 为了确定这种物种中乌玛米味道的主要贡献者.
- 探索谷氨酸-氨酸转胺酶 (GPT) 在乌玛米形成中的作用.
主要方法:
- 分析自由氨基酸 (FAA) 和味觉活性值 (TAV).
- 基因表达分析和GPT的功能干扰.
- 位点定向突变发生,以确定GPT中的关键残留物.
主要成果:
- 氨酸 (Ala) 被确定为主要的FAA,为Urechis unicinctus的乌玛米味道做出贡献.
- 与Ala含量相关的GPT活性和基因表达水平.
- GPT干扰显著降低了Ala和其他umami相关的氨基酸.
- 发现特定的残留物 (K298,S297,M294,N239) 对于GPT的催化活性至关重要.
结论:
- 氨酸是Urechis unicinctus中乌玛米味道的主要驱动因素,与其他海鲜不同.
- GPT在调节阿拉合成,从而调节乌玛米味道方面发挥着至关重要的作用.
- 识别的关键残留物为GPT的酶功能和进化适应提供了洞察力.
相关概念视频
Key Elements for Plant Nutrition
24.3K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
24.3K
Compounds Essential to Human Function
10.2K
The human body is composed of cells that are fundamentally made up of several different molecules. These molecules are essential to carry out all physiological processes in the body and are broadly classified into organic and inorganic based on their chemical structures.
Inorganic Compounds Essential to Human Functioning
Inorganic compounds essential to human functioning include water, salts, acids, and bases. These compounds are inorganic, i.e., they do not have a carbon-hydrogen bond. Water...
Inorganic Compounds Essential to Human Functioning
Inorganic compounds essential to human functioning include water, salts, acids, and bases. These compounds are inorganic, i.e., they do not have a carbon-hydrogen bond. Water...
10.2K
Organic Compounds
57.4K
All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
57.4K
Key Techniques in Microbiology
2.4K
Aseptic techniques prevent contamination, ensure experimental accuracy, and protect researchers and microbial cultures. These techniques are essential in clinical, industrial, and research settings where sterility is required.Maintaining Sterility in Laboratory PracticesScientists maintain sterility by sterilizing tools with heat or chemicals, disinfecting work surfaces, and handling cultures in controlled environments. Working near an open flame or within a laminar flow hood reduces the risk...
2.4K
Molecules and Compounds
68.7K
Atoms and Molecules
68.7K
Coordination Compounds and Nomenclature
26.7K
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
26.7K


