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Protein Organization01:24

Protein Organization

9.0K
Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence....
9.0K
Protein Folding01:22

Protein Folding

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Overview
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Protein Folding01:25

Protein Folding

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Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
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Conserved Binding Sites01:49

Conserved Binding Sites

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Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
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Amino acids03:42

Amino acids

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Amino acids are the monomers that comprise proteins. Each amino acid has the same fundamental structure, which consists of a central carbon atom, or the alpha (α) carbon, bonded to an amino group (NH2), a carboxyl group (COOH), and to a hydrogen atom. Every amino acid also has another atom or group of atoms bonded to the central atom known as the R group. There are 20 common amino acids present in proteins, each with a different R group. Variation in the amino acid sequence is responsible for...
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Author Spotlight: In Silico Creation and Impact of Carbonylated Amino Acids on Protein Structure and Function
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C100内のアミノ酸:計算的研究

Satnam Singh1, Surajit Kayal2, Brijesh Kumar Mishra2

  • 1Department of Physical Sciences, Sant Baba Bhag Singh University, Jalandhar, Punjab, 144030, India.

Chemphyschem : a European journal of chemical physics and physical chemistry
|December 21, 2025
PubMed
まとめ
この要約は機械生成です。

C100フラーレンは、グリシン、アラニン、セリンなどのアミノ酸を効果的に封入し、好ましい相互作用と構造の安定化を示す。封入は振動モードを変化させ、双極子モーメントを減少させ、それらの電子特性に影響を与える。

キーワード:
アミノ酸閉じ込めジペプチドフラーレンC100相互作用エネルギー

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科学分野:

  • 計算化学
  • 材料科学
  • ナノテクノロジー

背景:

  • フラーレン、特にC100は、ナノコンテナとしての可能性が探求されています。
  • アミノ酸は、多様な特性を持つ基本的な生体分子です。
  • ナノスケールでのホスト-ゲスト相互作用の理解は、新しい材料の開発に不可欠です。

研究 の 目的:

  • C100フラーレンをグリシン、アラニン、セリンのナノコンテナとして使用する実現可能性を調査すること。
  • 封入されたアミノ酸の相互作用エネルギーと構造的安定性を分析すること。
  • アミノ酸の振動モード、双極子モーメント、およびNMR化学シフトに対する封入の影響を調べること。

主な方法:

  • B3LYP-D3関数を用いた密度汎関数理論(DFT)。
  • 2次モーラー・プレセット摂動理論(MP2)。
  • 高精度計算のための、ドメインベース局所ペア自然軌道カップルドクラスターシングル、ダブル、および摂動トリプル(DLPNO-CCSD(T))法。

主要な成果:

  • 計算された相互作用エネルギーは、C100とアミノ酸の間の好ましいホスト-ゲスト相互作用を示唆しています(-47.8から-43.8 kcal/mol)。
  • 封入は、アミノ酸の水素結合および非水素結合の両方のコンフォメーションを安定化させます。
  • 振動解析は、運動の制限(ブルシフト)を示しますが、水素結合の強化(OHストレッチのレッドシフト)を示します。
  • 封入により、双極子モーメントの有意な減少と1H NMR化学シフトのダウンフィールドシフトが観察されます。

結論:

  • C100フラーレンは、小型アミノ酸の実現可能なナノコンテナです。
  • 封入は、グリシン、アラニン、セリンの電子的および振動的特性を大幅に変化させます。
  • C100ケージは、双極子モーメントを効果的にスクリーニングし、分子ダイナミクスに影響を与えます。