関連する実験動画
Updated: Jul 18, 2026
09:13
Optimized Protocol for the Extraction of Proteins from the Human Mitral Valve
Published on: June 14, 2017
プロディジオシンのバイオシンセシスにおけるタンパク質組み立てラインの部品:PigA,G,H,I,Jの特徴
Sylvie Garneau-Tsodikova1, Pieter C Dorrestein, Neil L Kelleher
1Department of Biological Chemistry & Molecular Pharmacology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA.
Journal of the American Chemical Society
|September 28, 2006
まとめ
研究者は,プロディジオシノシンの生合成を解明しました.
科学分野:
- バイオケミストリー バイオケミストリー
- 微生物学 微生物学とは
- メタボロミクスとは
背景:
- ストレプトマイセトの赤色代謝産物であるプロディジオシンは,ユニークなトリピロール構造を持っています.
- 最初のダイピロール (リングAとB) 形成は,プロディジオシン生物合成に不可欠です.
- 5つの重要な酵素 (PigA,G,H,I,J) は,この二ピロール組成に関与している.
研究 の 目的:
- ディピロール形成に関与する5つの酵素を異質的に発現させ,浄化する.
- ピロロールリングAとBのバイオシンセシスのステップ・バイ・ステップメカニズムを解明する.
- PigH酵素複合体の翻訳後の改変を調べるために.
主な方法:
- エシェリキア・コライにおけるPigA,G,H,I,およびJの異質表現.
- 5つの酵素を浄化する.
- 高性能液体染色法 (HPLC) とナノスプレー・フーリエ変換質量スペクトロメトリー (nFTMS) を分析する.
主要な成果:
- ピロロールリングA形成は,PigI/PigAまたはSfpを含む2つの異なる経路を経由して発生します.
- ピロロールリングBは,リングAがPigJに移転した後にPigHによって合成される.
- PigHの3つのドメイン (2つのACPと1つのSerT) はすべて,翻訳後の修正を受けています.
結論:
- 2,2-二ピロール生物合成経路に関する詳細なメカニズム的な洞察.
- プロディジオシンの前駆体形成に起因する酵素機構の特徴.
- 酵素機能における翻訳後の改変の役割を理解する.
関連する概念動画
02:15Protein and Protein Structure
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme can...
A protein's shape is critical to its function. For example, an enzyme can...
02:41Protein Complex Assembly
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
01:57Protein Complexes with Interchangeable Parts
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
02:41Protein Complex Assembly
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
01:57Protein Complexes with Interchangeable Parts
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
01:26Bacterial Protein Maturation
Bacterial protein maturation is a tightly regulated process that ensures newly synthesized polypeptides achieve correct functional conformations. This maturation involves a series of modifications, folding events, and quality control steps, often assisted by specialized chaperone proteins.N-Terminal ModificationsThe maturation of bacterial polypeptides begins cotranslationally as the polypeptide exits the ribosome. The first amino acid, N-formylmethionine (fMet), is typically modified at the...