相关实验视频
Updated: Jul 9, 2025

10:41
Identifying Amino Acid Overproducers Using Rare-Codon-Rich Markers
Published on: June 24, 2019
8.4K
关于分支链氨基酸氨基转移酶的研究进展
Can Chen1, Hassan Naveed1,2, Keping Chen1
1School of Life Sciences, Jiangsu University, Zhenjiang, China.
Frontiers in genetics
|November 29, 2023
概括
分支链氨基酸氨基转移酶对于氨基酸代谢至关重要,并且与癌症等疾病有关. 准这些酶为新的癌症疗法提供了潜力.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 酶学 是一种酶学.
背景情况:
- 分支链氨基酸氨基转化酶 (BCAT) 是各种生物体中分支链氨基酸 (BCAA) 代谢至关重要的酶.
- 这些酶促进了BCAA与相应的α-酸之间的氨基转移.
- BCAA代谢的失调与各种人类和动物疾病有关,包括糖尿病,心血管疾病,神经系统疾病和癌症.
研究的目的:
- 审查BCATs的跨种类进化和生物特征.
- 总结目前对不同物种 (动物,植物,微生物,人类) 的BCATs的研究.
- 分析BCAT功能背后的分子机制及其在疾病中的作用.
主要方法:
- 文献综述和对BCATs现有研究的综合.
- 分析BCAT的进化模式和生物功能.
- 检查BCATs的分子机制和疾病关联.
主要成果:
- BCATs在BCAA代谢中发挥着重要作用,对健康和疾病有影响.
- 受BCAT活性影响的BCAA代谢障碍与人类主要疾病有关.
- 在各种癌症的发病过程中,BCATs特别重要,并且正在成为潜在的治疗点.
结论:
- BCATs是氨基酸代谢中的关键酶,具有广泛的生物相关性.
- 由于BCAT功能障碍导致的异常BCAA代谢与一系列疾病有关,特别是癌症.
- 在开发新型治疗策略方面,BCATs是有前途的目标,尤其是在瘤学领域.
相关概念视频
Amines to Amides: Acylation of Amines
2.5K
Various carboxylic acid derivatives (such as acid chlorides, esters, and anhydrides) can be used for the acylation of amines to yield amides. The reaction requires two equivalents of amines. The first amine molecule functions as a nucleophile and attacks the carbonyl carbon to produce a tetrahedral intermediate. This is followed by the loss of the leaving group and restoration of the C=O bond.
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary...
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary...
2.5K
tRNA Activation
19.3K
Aminoacyl-tRNA synthetases are present in both eukaryotes and bacteria. Though eukaryotes have 20 different aminoacyl-tRNA synthetases to couple to 20 amino acids, many bacteria do not have genes for all of these aminoacyl-tRNA synthetases. Despite this, they still use all 20 amino acids to synthesize their proteins. For instance, some bacteria do not have the gene encoding the enzyme that couples glutamine with its partner tRNA. In these organisms, one enzyme adds glutamic acid to all of the...
19.3K
Allosteric Proteins-ATCase
5.8K
Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
5.8K
Preparation of Amines: Reductive Amination of Aldehydes and Ketones
2.8K
Carbonyl compounds and primary amines undergo reductive amination first to produce imines, followed by secondary amines in the same reaction mixture, using selective reducing agents like sodium cyanoborohydride or sodium triacetoxyborohydride. Reductive amination produces different degrees of substitution of amines depending on the starting amine substrate.
2.8K
Ligand Binding and Linkage
4.8K
Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
4.8K
Phase II Reactions: Acetylation Reactions
233
Acetylation, a phase II biotransformation reaction, introduces an acetyl group to drugs or their metabolites. Acetyltransferase enzymes facilitate this reaction, which resembles α-amino acid conjugation due to the addition of a functional group to the drug molecule.
The substrates for acetylation are typically drugs or their metabolites with an amino, sulfonamide, or hydrazine functional group. Acetylation can occur at several points in the drug molecule, including primary, secondary, and...
The substrates for acetylation are typically drugs or their metabolites with an amino, sulfonamide, or hydrazine functional group. Acetylation can occur at several points in the drug molecule, including primary, secondary, and...
233

