低酸素反応性ペプチドの自己組み立てと光のための非正規のアミノ酸

Binbin Hu¹, Na Song¹, Yawei Cao¹

¹Key Laboratory of Functional Polymer Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin 300071, China.

Journal of the American Chemical Society

|August 19, 2021

まとめ

研究者らは,窒素還元酵素に反応するペプチドプローブを作るための新しいアミノ酸を開発しました. これらの探査機は低酸素腫瘍細胞の効率的な光成像を可能にし,低酸素成像と生体材料の開発を進める.

科学分野:

生物化学
合成生物学
バイオマテリアル科学

背景:

固有の刺激反応性アミノ酸は,生物学的マイクロ環境内のタンパク質とペプチドの機能を正確に制御します.
窒素還元酵素 (NTR) は,ヒポキシ性腫瘍でしばしば過剰発現する酵素であり,がん画像の標的となる.

研究の目的:

NTR反応性ペプチドベースの超分子プローブを作成するために,新しい非正規のアミノ酸,2-ニトロイミダゾール-1-イルアラニンを合成し,特徴づける.
低酸素の腫瘍細胞を検出するための効率的な低酸素イメージング剤を開発する.

主な方法:

ミツノブ反応による2-ニトロイミダゾル-1-イルアラニンの合成.
NTR反応性とペプチド構造特性の関係を解明する.
NTR 還元による形質変形可能な超分子プローブの開発.

主要な成果:

新しい2ニトロイミダゾル-1-イルアラニンが合成され,NTR反応性が実証された.
最適化されたアロマティックペプチドは,NTR対応の自己組み立てを受けた.
超分子探査機は,固体腫瘍に効果的に浸透し,低酸素腫瘍細胞の効率的な光成像を可能にしました.

結論:

反応性のある光ペプチドナノ構造を作るため,多用途で容易に合成できるアミノ酸が開発された.
この研究は合成生物学の強力なツールキットであり,低酸素イメージングのための新しい生体材料の開発にも役立ちます.

さらに関連する動画

10:31

Residue-Specific Exchange of Proline by Proline Analogs in Fluorescent Proteins: How "Molecular Surgery" of the Backbone Affects Folding and Stability

Published on: February 3, 2022

3.1K

09:17

Co-immunoprecipitation Assay Using Endogenous Nuclear Proteins from Cells Cultured Under Hypoxic Conditions

Published on: August 2, 2018

18.4K

関連する概念動画

03:42

Amino acids

97.7K

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...

97.7K

01:57

Gene Families

9.4K

Gene families consist of groups of genes proposed to have originated from a common ancestor. Typically these arise through events in which a gene or genes are mistakenly duplicated during cell division. Unlike their parent genes (which are subject to selection pressure to maintain function), these gene copies do not need to preserve their sequences and may evolve at a relatively faster rate.
Occasionally these regions can be adapted to take on new roles within the organism, becoming novel genes...

9.4K

02:21

Globular and Fibrous Proteins

45.5K

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...

45.5K

01:25

Protein Folding

9.7K

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...