FosとJunのレウシンジッパの並列結合は,DNA結合ドメインを並べている

R Gentz¹, F J Rauscher, C Abate

¹Department of Molecular Oncology, Roche Institute of Molecular Biology, Nutley, NJ 07110.

Science (New York, N.Y.)

|March 31, 1989

まとめ

FosとJunのタンパク質は,DNAに結合する複合体を形成します. レウシンジッパーによって誘発されるこの二重化は,DNA結合活動と機能に不可欠です.

科学分野:

分子生物学は分子生物学である.
腫瘍遺伝子 (オンコゲネス) とは
タンパク質とDNAの相互作用

背景:

フォスおよびジュンプロトオンコゲンは,ヘテロディメア複合体を形成するタンパク質をコードする.
この複合体は,AP-1結合部位を含むDNA要素と相互作用する.

研究の目的:

複合体の形成とDNA結合に関するFosおよびJunタンパク質の欠失および点変異の影響を調査する.
Fos-Jun異体化とDNA相互作用の構造的基礎を解明する.

主な方法:

FosおよびJunタンパク質のサイト誘導性変異.
タンパク質複合体の形成の分析.
DNA結合親和度の評価. DNA結合親和度の評価. DNA結合親和度の評価. DNA結合親和度の評価. DNA結合親和度の評価.

主要な成果:

FosとJunのタンパク質は,彼らの螺旋ドメインの並列の相互作用によって二元化され,特にルシンのジッパーモチーフが含まれる.
この二重化はDNA結合の前提条件である.
両方のタンパク質の塩基アミノ酸領域は,DNA結合に不可欠であり,二分化時に適切に配置されています.

結論:

レウシンジッパードメインは,フォス-ジュン異体化に媒介する.
ダイメリゼーションは,重要なDNA結合領域を配置し,AP-1サイトとの高親和の相互作用を可能にします.
これらの相互作用を理解することは,遺伝子調節におけるプロトオンコゲン機能を解読する上で極めて重要です.

さらに関連する動画

11:58

In-Nucleus Hi-C in Drosophila Cells

Published on: September 15, 2021

11:01

RNA-Associated Chromatin DNA-DNA Interaction Method

Published on: April 30, 2026

関連する概念動画

00:58

DNA Packaging

Overview

00:55

DNA Helicases

DNA unwinding helicase enzymes are a type of motor protein. Motor proteins can translocate along filaments or polymers using energy generated from ATP hydrolysis. Helicases are involved in all the important cellular processes where DNA unwinding is required, such as DNA replication, repair, recombination, and transcription. They are present in all living organisms, but vary in their structure, function, and mechanism of action. For example, in prokaryotes, DnaB helicase binds and translocates...

02:02

DNA Topoisomerases

Topoisomerases are enzymes that relax overwound DNA molecules during various cell processes, including DNA replication and transcription. These enzymes regulate positive and negative DNA supercoiling without changing the nucleotide sequence. DNA overwinding in a clockwise direction results in positively supercoiled DNA, whereas underwinding in a counterclockwise direction produces negatively supercoiled DNA.
Types and Mechanism of action
Topoisomerases are divided into two main types. Type I...

02:05

Duplication of Chromatin Structure

The process of chromosome duplication during cell division requires genome-wide disruption and re-assembly of chromatin. The chromatin structure must be accurately inherited, reassembled, and maintained in the daughter cells to ensure lineage propagation.
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...

01:03

Single-Strand DNA Binding Proteins

For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...

02:41

Chromatin Structure and RNA Splicing

In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...

関連する実験動画