関連する実験動画
Updated: May 4, 2026

13:51
The MultiBac Protein Complex Production Platform at the EMBL
Published on: July 11, 2013
15.8K
バクテリオファージム・トランスポゼーゼ核の構造:DNAトランスポジションとレトロウイルス統合の共通の構造モチーフ
1Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0540, USA.
Cell
|July 28, 1995
まとめ
バクテリオファージのMuトランスポゼ (MuA) の結晶構造は,HIV-1インテグラゼに類似していることを示している. その活性部位は単体形式で不活性に見られ,DNA結合がMuAを活性化することを示唆しています.
科学分野:
- 構造生物学 構造生物学とは
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- バクテリオファージのMuトランポゼ (MuA) は,ウイルスのDNA統合に不可欠です.
- MuAの構造を理解することは,その触媒メカニズムを解明する鍵です.
- MuAは,HIV-1インテグラゼのような他のDNA処理酵素と機能的類似性を共有しています.
研究 の 目的:
- MuAコアドメインの高解像度結晶構造を決定するために.
- MuAの構造特性を関連酵素と比較する.
- MuAの調節と活性化の構造的基盤を調査する.
主な方法:
- 2.4Aの解像度のX線結晶学. 解像度2.4AのX線結晶学.
- 2つの結晶形態から3つの独立したモノマー構造の分析.
- 他のヌクレアゼとの比較構造分析.
主要な成果:
- MuAコアドメインの結晶構造が解明されました.
- MuAの活性部位サブドメインは,HIV-1インテグラゼと構造的に有意な類似性を示しています.
- 活性部位は一貫して,モノメールの明らかに不活性な形状で観察されました.
- ベータバレルサブドメインは,アクティブサイトサブドメインに接続します.
結論:
- MuAの構造は,他のインテグラーゼと保存された特性を共有しており,共通の進化的起源または機能的適応を示唆しています.
- モノマー内の活性部位の非活性構成は,規制メカニズムを暗示する.
- サブドメイン間の相互作用により,MuAの活性が制御され,DNA結合と活性化が潜在的に結びつく可能性があります.
関連する概念動画
Viral Structure
59.0K
Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
59.0K
Intracellular Movement of Viruses and Bacteria
3.0K
Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
3.0K
Mechanism of Conjugation
1.6K
Bacterial conjugation is a mechanism of horizontal gene transfer that enables the exchange of genetic material between bacterial cells through direct contact. This process is facilitated by a donor cell carrying a conjugative plasmid, which encodes genes necessary for pilus formation, DNA replication, and transfer. The conjugative plasmid plays a central role in initiating and executing the transfer of genetic material.The tra region of the conjugative plasmid encodes proteins responsible for...
1.6K
Viral Replication: Lytic Cycle
3.0K
Bacteriophages, or phages, are viruses that specifically infect bacteria. Among them, T-even bacteriophages, such as T4, exhibit a well-characterized lytic replication cycle in Escherichia coli (E. coli). This process ensures the rapid proliferation of the virus while ultimately leading to the destruction of the bacterial host.Attachment and DNA InjectionThe infection process begins with the recognition and binding of the T4 phage to the E. coli cell surface. Tail fibers of the phage...
3.0K
DNA Bacteriophages
1.6K
Bacteriophages, or phages, are viruses that specifically infect bacteria, utilizing their genetic material to hijack host cellular machinery for replication. DNA bacteriophages employ single-stranded DNA (ssDNA) or double-stranded DNA (dsDNA) genomes. These phages exhibit diverse replication strategies and host interactions, influencing their ecological roles and applications in biotechnology and medicine.ssDNA BacteriophagesssDNA phages, with their small genomes, utilize unique strategies to...
1.6K
Viruses with RNA Genomes
1.5K
RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
1.5K

