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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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Antibiotic Selection00:57

Antibiotic Selection

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Overview
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Factors Affecting Protein-Drug Binding: Protein-Related Factors01:20

Factors Affecting Protein-Drug Binding: Protein-Related Factors

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Drug binding to proteins is a key aspect of pharmacokinetics and can influence a drug's distribution, absorption, and elimination in the body. Several factors, including the drug's physiochemical properties, protein concentration, disease states, and the number of binding sites on the protein, influence this process.
The physicochemical properties of a drug play a significant role in its ability to bind to proteins. Lipophilic drugs, which dissolve in fats, oils, and lipids, can be...
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The Equilibrium Binding Constant and Binding Strength02:18

The Equilibrium Binding Constant and Binding Strength

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The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
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Ligand Binding Sites02:40

Ligand Binding Sites

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Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
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Drug Distribution: Plasma Protein Binding01:29

Drug Distribution: Plasma Protein Binding

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Drugs predominantly attach to plasma proteins, with only a small percentage remaining unbound. The unbound portion can be calculated as one minus the bound fraction. Acidic drugs form large, inactive complexes by reversibly binding to plasma albumin, which prevents them from diffusing across biological barriers. These drug-protein complexes act as reservoirs for the drugs. As the concentration of unbound drugs decreases, these complexes quickly dissociate to release the free drug, maintaining...
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関連する実験動画

Updated: Feb 3, 2026

Application of Elemental Lanthanides in the Selective C-F Activation of Trifluoromethylated Benzofulvenes Providing Access to Various Difluoroalkenes
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ランモジュリン:ランタニド利用細菌からの高度選択的ランタニド結合タンパク質

Joseph A Cotruvo1, Emily R Featherston1, Joseph A Mattocks1

  • 1Department of Chemistry , The Pennsylvania State University , University Park , Pennsylvania 16802 , United States.

Journal of the American Chemical Society
|October 24, 2018
PubMed
まとめ
この要約は機械生成です。

研究者らはランモジュリン (LanM) を発見し,ランタニド (Lns) を選択的にカルシウムイオンに結合するタンパク質を発見した. この発見は 生物がこれらの金属を 区別する方法を明らかにし バイオテクノロジーの応用の可能性も示しています

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科学分野:

  • 生物化学
  • 微生物学
  • バイオテクノロジー

背景:

  • ランタニド (Lns) は,メチロトロフ菌の酵素における必須の共因体としてますます認識されている.
  • 選択的金属イオン結合の生物学的メカニズムを理解することは,基礎科学と技術的な応用の両方にとって極めて重要です.

研究 の 目的:

  • メチロバクテリア エクストルクエンスの選択的なランタニド結合を担当するタンパク質を特定し,特徴づけること.
  • カルシウムに対するランタニドの選択性の構造的および機能的根拠を解明する.

主な方法:

  • ランモジュリン (LanM) のタンパク質浄化と特徴付け
  • ランタニドとカルシウムに対する親和性と選択性を決定する金属結合試験.
  • 特定の残留物の金属選択性における役割を調査するためのLanMのサイト指向型変異.

主要な成果:

  • ランモジュリン (LanM) の特定は,ピコモラ濃度でランタニド (LnIII) を選択的に結合する4つのEFハンドモチーフを持つ新しいタンパク質です.
  • LanMは,LnIII結合時に重要な形状変化を経験し,無秩序状態から有秩序状態に移行する.
  • LANMのEFハンドにおける独特のプロリン残基の変異は,高いLnIII親和性を維持しながら,マイクロモラー範囲へのカルシウム (CaII) 結合を変化させ,選択性におけるその役割を強調した.

結論:

  • ランモジュリン (LanM) は,生物学的金属イオン認識を理解するために不可欠な,高度に選択的なランタニド結合タンパク質です.
  • LanMのEFの手の独特のプロリン残留は,カルシウムに対するランタニド選択性の重要な決定因子です.
  • この発見は,ランタニド検出,封じ込め,分離のためのバイオテクノロジーの開発に意味があります.