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関連する概念動画

Products of the Citric Acid Cycle00:53

Products of the Citric Acid Cycle

The cells of most organisms—including plants and animals—obtain usable energy through aerobic respiration, the oxygen-requiring version of cellular respiration. Aerobic respiration consists of four major stages: glycolysis, pyruvate oxidation, the citric acid cycle, and oxidative phosphorylation. The third major stage, the citric acid cycle, is also known as the Krebs cycle or tricarboxylic acid (TCA) cycle.
Nucleic Acids02:43

Nucleic Acids

Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
Nucleic Acid Structure01:25

Nucleic Acid Structure

The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA has a double-helix structure. The...
Amino Acid Catabolism01:18

Amino Acid Catabolism

Microorganisms rely on proteins as an essential carbon and energy source, particularly in environments with limited polysaccharides or lipids. However, proteins are too large to cross the plasma membrane unaided, necessitating enzymatic degradation. Microbes secrete extracellular proteases and peptidases that hydrolyze proteins into peptides, which can then be transported across the membrane. Once inside the cell, intracellular proteases degrade these peptides into free amino acids, which...
Amino Acid Biosynthetic Pathways01:29

Amino Acid Biosynthetic Pathways

Amino acid biosynthesis is essential for cell growth, protein synthesis, and metabolic regulation. Cells generate essential and non-essential amino acids from metabolic intermediates to sustain vital biological functions. These intermediates originate from key metabolic pathways: glycolysis, the tricarboxylic acid (TCA) cycle, and the pentose phosphate pathway. Important precursors include α-ketoglutarate, pyruvate, oxaloacetate, phosphoenolpyruvate, and erythrose-4-phosphate, which provide...
Biosynthesis of Nucleic Acids01:28

Biosynthesis 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...

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関連する実験動画

Updated: Jul 12, 2026

Folding and Characterization of a Bio-responsive Robot from DNA Origami
07:59

Folding and Characterization of a Bio-responsive Robot from DNA Origami

Published on: December 3, 2015

テンプレート構造としてのN-メチル化サイクルペンタアランインペプチド.

Jayanta Chatterjee1, Dale Mierke, Horst Kessler

  • 1Department Chemie, Lehrstuhl II für Organische Chemie, Technische Universität München, Lichtenbergstrasse 4, Garching D-85747, Germany.

Journal of the American Chemical Society
|November 23, 2006
PubMed
まとめ

周期性ペプチドのNメチル化は,生物利用性を高め,形状制御を可能にします. この研究では,N-メチル化ペプチドを合成および分析し,薬物設計のための安定した単一の構成を持つ7つを特定しました.

科学分野:

  • 薬用化学 薬用化学について
  • ペプチド化学 ペプチド化学
  • 構造生物学 構造生物学とは

背景:

  • ペプチドのN-メチル化は,柔軟性および脂性性を変化させることで,活性,選択性,および生物利用可能性 (ADMETプロファイル) を調節する.
  • 形状的に制約された周期性ペプチドは,薬剤の設計と生物学的システムの理解に価値があります.

研究 の 目的:

  • 構造的に安定した構造を特定するために,N-メチル化サイクルペプチドのライブラリを合成し,特徴づけること.
  • 合理的な薬物設計と医学的に重要なペプチドシステムの空間的なスクリーニングのためのテンプレートを確立する.

主な方法:

  • シーケンスサイクロ (((-D-Ala-L-Ala4-)) を持つ30個のN-メチル化されたサイクルペプチドのライブラリを合成しました.
  • 形状の安定性を決定するための核磁気共鳴 (NMR) 分析.
  • 構造的精錬のために,明示的なDMSOでの距離幾何学および分子動力学シミュレーション.

主要な成果:

  • 合成された30種のうち7種のN-メチル化ペプチドは,単一の安定した形状 (>98%の人口) を示した.
  • これらの形状的に制約されたペプチドの詳細な構造的特徴が明らかにされました.
  • この研究は,N-メチル化サイクルペプチドの構造-活性関係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

Functional Complementation Analysis (FCA): A Laboratory Exercise Designed and Implemented to Supplement the Teaching of Biochemical Pathways
09:27

Functional Complementation Analysis (FCA): A Laboratory Exercise Designed and Implemented to Supplement the Teaching of Biochemical Pathways

Published on: June 24, 2016

Hierarchical and Programmable One-Pot Oligosaccharide Synthesis
09:56

Hierarchical and Programmable One-Pot Oligosaccharide Synthesis

Published on: September 6, 2019

関連する実験動画

Last Updated: Jul 12, 2026

Folding and Characterization of a Bio-responsive Robot from DNA Origami
07:59

Folding and Characterization of a Bio-responsive Robot from DNA Origami

Published on: December 3, 2015

Functional Complementation Analysis (FCA): A Laboratory Exercise Designed and Implemented to Supplement the Teaching of Biochemical Pathways
09:27

Functional Complementation Analysis (FCA): A Laboratory Exercise Designed and Implemented to Supplement the Teaching of Biochemical Pathways

Published on: June 24, 2016

Hierarchical and Programmable One-Pot Oligosaccharide Synthesis
09:56

Hierarchical and Programmable One-Pot Oligosaccharide Synthesis

Published on: September 6, 2019

結論:

  • N-メチル化は,周期性ペプチドの構成制約を達成するための効果的な戦略です.
  • 特定された安定したペプチド構成は,新しい治療法を設計するためのテンプレートとして機能することができます.
  • この作業は,ペプチドベースの薬剤のバイオアクティブ構成物の空間的スクリーニングを容易にする.