関連する実験動画
Updated: Jan 2, 2026

11:13
Identification of Kinase-substrate Pairs Using High Throughput Screening
Published on: August 29, 2015
8.5K
KRAS4Aはヘクソキナーゼ1を直接調節する
Caroline R Amendola1, James P Mahaffey1, Seth J Parker1
1Perlmutter Cancer Center, NYU School of Medicine, New York, NY, USA.
Nature
|December 13, 2019
まとめ
KRAS4Aはヘクソキナーゼ1 (HK1) と直接相互作用し,その活性が変化する. この新しいKRAS4A-HK1相互作用は,KRASシグナル伝達と細胞代謝の間の直接的なリンクを明らかにし,がんにおける潜在的な治療目標を提供します.
科学分野:
- 分子生物学
- 腫瘍学
- 細胞の代謝
背景:
- KRASはがんにおいて頻繁に変異する腫瘍遺伝子であり,C末端部が異なるKRAS4AとKRAS4Bの同型を生成する.
- 腫瘍性KRAS変異は細胞変異を活性化し,腫瘍細胞の代謝を変化させ,特にWarburg効果を誘発する.
- 以前の研究では,直接的な酵素調節が不明のまま,転写の変化に代謝変化が起因していた.
研究 の 目的:
- KRAS アイソフォームと代謝酵素の間の潜在的な直接の相互作用を調査する.
- KRAS4Aが代謝酵素の活性を直接調節するかどうかを確認する.
- KRAS4A媒介の代謝調節の機能的および治療的影響を探求する.
主な方法:
- KRAS4Aとヘクソキナーゼ1 (HK1) の間のGTP依存の相互作用を検出するための生化学分析
- 外部ミトコンドリア膜におけるKRAS4AとHK1のコロカライゼーションを調査する細胞局所化研究.
- KRAS4A-HK1の相互作用がHK1の活動に与える影響を評価するための機能検査
主要な成果:
- KRAS4Aとヘクソキナーゼ1 (HK1) の間には,GTPに依存する直接的な相互作用が確認された.
- この相互作用は,HK1の酵素活性を直接変化させ,KRAS4AのエフェクタとしてHK1を確立することが示された.
- KRAS4Aのユニークなパルミトイライレーションサイクルにより,外部のミトコンドリア膜にHK1とのコロカライゼーションが容易になります.
結論:
- KRAS4AはHK1の活性を直接調節し,がんにおける新種の代謝制御メカニズムを表しています.
- KRAS4A- HK1の相互作用は,がん代謝におけるKRASの異形特異的機能を強調する.
- KRAS4A- HK1の相互作用をターゲットにすることで,KRAS4Aを発現するがんの独特の代謝の脆弱性を利用して,治療上の利益を得ることができます.
関連する概念動画
cAMP-dependent Protein Kinase Pathways
8.1K
Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...
8.1K
PI3K/mTOR/AKT Signaling Pathway
5.2K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
5.2K
The JAK-STAT Signaling Pathway
11.6K
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
11.6K
Protein Kinases and Phosphatases
14.7K
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
14.7K
Regulation of Angiogenesis and Blood Supply
3.3K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
3.3K
What is Glycolysis?
175.6K
Overview
Cells make energy by breaking down macromolecules. Cellular respiration is the biochemical process that converts "food energy" (from the chemical bonds of macromolecules) into chemical energy in the form of adenosine triphosphate (ATP). The first step of this tightly regulated and intricate process is glycolysis. The word glycolysis originates from the Latin glyco (sugar) and lysis (breakdown). Glycolysis serves two main intracellular functions: generating ATP and generating...
Cells make energy by breaking down macromolecules. Cellular respiration is the biochemical process that converts "food energy" (from the chemical bonds of macromolecules) into chemical energy in the form of adenosine triphosphate (ATP). The first step of this tightly regulated and intricate process is glycolysis. The word glycolysis originates from the Latin glyco (sugar) and lysis (breakdown). Glycolysis serves two main intracellular functions: generating ATP and generating...
175.6K

