甲氨酸缺乏对肉组织蛋白质周转的影响:对甲氨酸来源的比较分析
José Alberto Conde-Aguilera1, Sonia Métayer-Coustard2, Yves Mercier3
1INRAE, Agrocampus Ouest, PEGASE 35590 Saint-Gilles, France.
Poultry science
|June 18, 2025
概括
氨酸缺乏通过增加蛋白质分解,影响的生长和肌肉发育. 当足够供应DL-methionine及其模拟DL-HMTBA时,它们都有效地支持肌肉蛋白质合成.
科学领域:
- 动物营养 动物营养
- 禽畜科学 禽畜科学 禽畜科学
- 生物化学 生物化学
背景情况:
- 氨酸 (Met) 是一种必需的氨基酸,对家禽的生长和发育至关重要.
- 了解Met在组织蛋白代谢中的作用对于优化肉饮食至关重要.
- 关于甲基含量和来源如何影响蛋白质合成和降解的信息有限.
研究的目的:
- 为了比较甲基缺乏和补充对肉生长表现的影响.
- 研究不同Met来源 (DL-Met和DL-HMTBA) 对组织蛋白代谢的影响.
- 分析肉组织中的蛋白质合成速率,蛋白质分解活性和相关基因表达.
主要方法:
- 肉被食缺乏或充足的甲,并补充DL-Met或DL-HMTBA.
- 在体内测量蛋白质合成时,使用[13C]-瓦林在肝脏,肌肉和阴的洪水剂量.
- 评估了与蛋白质分解和自相关的蛋白质酶活性和基因表达.
主要成果:
- 氨酸缺乏减少了的整体体重和Pectoralis主要肌肉体重和蛋白质合成.
- 微分合成速率 (FSR) 没有受到Met缺乏的抑制,但蛋白质酶体活性显著增加.
- 在大多数测量参数上,DL-HMTBA补充显示了与DL-Met相似的效果,表明其有效性.
结论:
- 氨酸缺乏通过改变蛋白质周转而显著损害的生长和肌肉发育.
- DL-HMTBA作为一种有效的 metionin 来源,支持肌肉蛋白质合成类似于DL-Met.
- 这些发现强调了充分的氨酸供应对于优化家禽生产的重要性.
更多相关视频
09:40A Mass Spectrometry-Based Proteomics Approach for Global and High-Confidence Protein R-Methylation Analysis
Published on: April 28, 2022
2.5K
07:39Cell-Type Specific Protein Purification and Identification from Complex Tissues Using a Mutant Methionine tRNA Synthetase Mouse Line
Published on: April 13, 2022
3.0K
相关概念视频
01:21Overview of Protein Metabolism
1.9K
Proteins are broken down into amino acids during digestion. Unlike fats and carbohydrates, which are stored for later use, proteins are not. Instead, amino acids are either used to produce ATP through oxidation or contribute to the creation of new proteins for the growth and repair of the body. Any surplus amino acids from the diet are converted into glucose or triglycerides rather than excreted.
Amino acids play various roles in the body once they are absorbed into cells. They are restructured...
Amino acids play various roles in the body once they are absorbed into cells. They are restructured...
1.9K
01:28Proteins: Dietary Sources and Requirements
650
Consuming animal-based products offers high-quality proteins that contain optimal levels and combinations of essential amino acids, crucial for tissue repair and growth. Foods like eggs, milk, fish, and most meats are a source of complete proteins. Legumes and cereals are abundant in proteins; however, they typically lack a full range of essential amino acids. As a result, they are considered incomplete protein sources. Some plant sources like soybeans, quinoa, and amaranth do contain complete...
650