リン酸塩生物合成:炭素-リン酸結合の形成に起因する酵素を分離する
H M Seidel1, S Freeman, H Seto
1Department of Chemistry, Harvard University, Cambridge, Massachusetts 02138.
Nature
|September 29, 1988
まとめ
研究者らは,酵素であるフォスホーノロールピルバート・フォスホノムターゼを特定し,これはフォスホネートにおけるリン-炭素結合の形成に不可欠である. この発見は,Tetrahymena pyriformis.のような生物におけるフォスフォナート生物合成の長年の謎を解明しています.
科学分野:
- バイオケミストリー バイオケミストリー
- 分子生物学は分子生物学である.
- 微生物学 微生物学とは
背景:
- リンと炭素の結合を含んだリン酸塩は,様々な生物で存在します.
- フォスフォナートにおけるP-C結合の生物合成経路は,ほとんど未定義のままである.
- 以前の研究では,フォスフォノールピルバートのフォスフォナート形成における役割が示唆されていたが,決定的な証拠は得られなかった.
研究 の 目的:
- フォスフォナートにおける-炭素結合の未定義の生物合成経路を解明する.
- フォスフォエノルピルバートのフォスフォノピルバートへの変換に責任を負う酵素を特定し,特徴づけること.
主な方法:
- Tetrahymena pyriformis.で [14C]グルコースと [32P]フォスフェノールピルバートを用いた同位体ラベル付け実験.
- T. pyriformis. から酵素の分離と特徴づけ
- フォスホーノールピルバートのフォスホーノルピルバートへの変換を調査する.
主要な成果:
- この研究は,リン酸塩生物合成の謎を解く実験を報告している.
- T. pyriformisから純粋な酵素,フォスフォenolピルバートフォスフォノムタゼを分離し,特徴づけました.
- フォスフォエノルピルバートのステキオメトリック変換における酵素の役割の実証.
結論:
- フォスフォenolノールピルバートフォスフォノムターゼの存在が確認されました.
- この発見は,長年にわたるリン酸塩生物合成の謎を解明する.
- この発見は,フォスフォネートのより広範な生物学的意義を理解するための基礎を提供します.
さらに関連する動画
08:46Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)
Published on: November 22, 2016
07:20Discovery and Synthesis Optimization of Isoreticular Al(III) Phosphonate-Based Metal-Organic Framework Compounds Using High-Throughput Methods
Published on: October 6, 2023
関連する概念動画
01:01Phosphodiester Linkages
Overview
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
01:02Phosphorylation
The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
02:54Protein Kinases and Phosphatases
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
01:42Phosphoinositides and PIPs
Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
01:26Biosynthesis of Polysaccharides
Polysaccharides such as glycogen and starch are synthesized from nucleoside diphosphate sugars, primarily uridine diphosphate glucose (UDPG) and adenosine diphosphate glucose (ADPG). These activated glucose donors act as key intermediates in carbohydrate metabolism and biosynthesis. UDPG primarily involves glycogen synthesis in animals and many bacteria, while ADPG plays a fundamental role in starch synthesis in plants and certain bacteria.UDPG is formed when glucose-1-phosphate reacts with...
01:28Biosynthesis of Nucleic Acids
Nucleic acid biosynthesis is a fundamental biochemical process that produces the purine and pyrimidine nucleotides essential for DNA and RNA synthesis. This pathway maintains a balanced nucleotide pool, preventing imbalances that could jeopardize genetic integrity and cellular function. Given the crucial role of nucleotides, their synthesis is tightly regulated to ensure proper cellular homeostasis.Purine BiosynthesisThe biosynthesis of purine nucleotides begins with ribose-5-phosphate, a...