人間のPKD1-PKD2複合体の構造
Qiang Su1, Feizhuo Hu1, Xiaofei Ge1
1Beijing Advanced Innovation Center for Structural Biology, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, School of Medicine, Tsinghua University, Beijing 100084, China.
まとめ
自体主有多囊性腎疾患 (ADPKD) は,PKD1およびPKD2遺伝子変異と関連しています. 研究者はPKD1-PKD2複合体の構造を明らかにし,ADPKDの疾患メカニズムを説明できる非正規のTRPチャネルアーキテクチャを発見した.
科学分野:
- 構造生物学
- 分子生物学
- 遺伝学
背景:
- 自体主有多囊性腎臓病 (ADPKD) は一般的な単発性疾患である.
- *PKD1* と *PKD2* の遺伝子の変異は,ADPKDの症例の大部分に起因する.
- PKD1-PKD2複合体の構造を理解することは,ADPKDの病原性を明らかにするために極めて重要です.
研究 の 目的:
- 人間のPKD1-PKD2複合体の冷凍電子顕微鏡構造を決定する.
- PKD1-PKD2複合体のアーキテクチャを特徴付け,重要な機能領域を特定する.
- PKDタンパク質の機能と疾患メカニズムを理解するための構造的基礎を提供すること.
主な方法:
- クリオ電子顕微鏡 (cryo-EM) を用いて,ヒトのPKD1- PKD2複合体の構造を決定した.
- 複合体はPKD1とPKD2の1:3の比率で組み立てられました.
- 高解像度構造分析は3. 6アングストームで行われました.
主要な成果:
- 構造は,PKD1とPKD2の相互作用によって形成された非正規の一時受容体ポテンシャル (TRP) チャンネルアーキテクチャを明らかにした.
- PKD1は電圧ゲートイオンチャネル (VGIC) の折りたたみを示し,独特の壊れたS6ヘリクスを有する.
- 構造は,PKD1内の5つのトランスメブランのヘリックス領域と細胞塩基のPLAT領域と,潜在的なカチオン阻害残留物を特定した.
結論:
- PKD1-PKD2複合体の決定された構造は,この重要なイオンチャネルの分子構造に関する前例のない洞察を提供します.
- この発見は,PKD1とPKD2の突然変異がADPKDにどのようにつながるのかを理解するための枠組みを提供する.
- この構造情報は,ADPKDの機能的メカニズムと治療戦略に関する将来の研究にとって不可欠です.
関連する概念動画
Assembly of Complex Microtubule Structures
2.5K
Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
2.5K
Structural Organization of the Human Body: An Overview
29.5K
It is convenient to consider the body's structures in terms of fundamental levels of organization that increase in complexity: subatomic particles, atoms, molecules, organelles, cells, tissues, organs, organ systems, and organisms.
To study the chemical level of organization, scientists consider the simplest building blocks of matter: subatomic particles, atoms, and molecules. All matter in the universe is composed of one or more unique pure substances called elements, familiar examples of...
To study the chemical level of organization, scientists consider the simplest building blocks of matter: subatomic particles, atoms, and molecules. All matter in the universe is composed of one or more unique pure substances called elements, familiar examples of...
29.5K
Chromosome Structure
26.6K
A functional eukaryotic chromosome must contain three elements: a centromere, telomeres, and numerous origins of replication.
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
26.6K
Structural Isomerism
21.7K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
21.7K
Protein Complex Assembly
16.8K
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
16.8K
Protein Complexes with Interchangeable Parts
2.9K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
2.9K


