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Protein Organization01:13

Protein Organization

136.2K
Overview
136.2K
Protein Folding01:25

Protein Folding

7.7K
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...
7.7K
Protein and Protein Structure02:15

Protein and Protein Structure

77.8K
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...
77.8K
Multi-pass Transmembrane Proteins and β-barrels01:09

Multi-pass Transmembrane Proteins and β-barrels

5.2K
In multi-pass transmembrane proteins, the polypeptide chain crosses the membrane more than once. The transmembrane polypeptide chain either forms an α-helix or β-strand structure. α-Helix containing multi-pass transmembrane proteins are ubiquitous, whereas β-strand containing ones are mainly found in gram-negative bacteria, mitochondria, and chloroplasts.
α-Helix containing multi-pass transmembrane proteins
Multi-pass transmembrane proteins such as...
5.2K
Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

17.6K
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
17.6K
Globular and Fibrous Proteins02:21

Globular and Fibrous Proteins

43.2K
Many proteins can be classified into two distinct subtypes - globular or fibrous. These two types differ in their shapes and solubilities.
Globular proteins are also known as spheroproteins and typically are approximately round in shape. They contain a mix of amino acid types and contain differing sequences in their primary structures. Globular proteins have many different functions, such as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be...
43.2K

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Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
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Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

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メタル-α-ヘリックスペプチドフレーム

Ronnie Richardson-Matthews1, Kateryna Velko1, Bitan Bhunia1

  • 1Department of Chemistry, University of Illinois Chicago, Chicago, Illinois 60607, United States.

Journal of the American Chemical Society
|May 6, 2025
PubMed
まとめ

研究者は,金属タンパク質を模倣する金属ペプチドフレームワーク (MPF) のためのモジュラーペプチド設計を開発しました. この戦略により 多様な生物模倣金属部位と 多孔性物質のダイナミックな振る舞いが可能になる.

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Constructing Thioether/Vinyl Sulfide-tethered Helical Peptides Via Photo-induced Thiol-ene/yne Hydrothiolation
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A Tripeptide-Stabilized Nanoemulsion of Oleic Acid
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A Tripeptide-Stabilized Nanoemulsion of Oleic Acid

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Last Updated: May 23, 2025

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A Tripeptide-Stabilized Nanoemulsion of Oleic Acid
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科学分野:

  • 超分子化学
  • 材料科学
  • バイオミメティック・ケミストリー

背景:

  • メタルペプチドフレームワーク (MPF) は,新興の金属有機フレームワークのクラスです.
  • 準確なメタルプロテイン模倣のための二次構造と天然のアミノ酸サイドチェーンを持つ限られたMPFが存在する.

研究 の 目的:

  • バイオミテックメタルサイトを備えたMPFの構築のための堅牢でモジュラーな戦略を設計する.
  • フレームワーク構造と金属の協調性に対するペプチド配列の変動の影響を調査する.

主な方法:

  • メタルの結合のためにGluとHis残基を組み込んだ短いα-ヘリルペプチドを設計した.
  • 単一のアミノ酸の変異を生成し,ペプチド変異のライブラリを生成した.
  • 単結晶X線微分法を用いたフレームワーク構造の特徴づけ

主要な成果:

  • Co ((II) を使用して,異なる金属ノード協調幾何学と組成を持つ多様なMPFを成功裏に生成しました.
  • 20種のうち16種が構造的に特徴付けられ,金属の協調球に対する非共振相互作用の影響を明らかにした.
  • メタロプロテインのダイナミックな振る舞いを模倣した1つの変種で,リガンドによって引き起こされた形状の変化を示した.
  • 複数の金属イオン (Mn ((II),Fe ((II),Cu ((II),Zn ((II)) を含むフレームアセンブリを展示し,アプローチの汎用性を確認した.

結論:

  • 開発されたペプチドベースの戦略は,多孔性材料のバイオミメティック金属センターを設計するためのアクセシブルなプラットフォームを提供します.
  • 合成のモジュラリティと容易さは,触媒と分離などの分野でMPFの研究と応用を容易にする.