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関連する概念動画

Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

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Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
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Amplifying Signals via Enzymatic Cascade01:22

Amplifying Signals via Enzymatic Cascade

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When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze...
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Diversity in Cell Signaling Responses01:22

Diversity in Cell Signaling Responses

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The physiological function of a cell and cellular communication are outcomes of a range of extrinsic signals, intracellular signaling pathways, and cellular responses. No two cell types express the same repertoire of signaling components. Receptors are highly selective for their cognate ligands, but once activated, they can alter multiple cellular processes such as DNA transcription, protein synthesis, and metabolic activity. 
Graded and Abrupt Responses
Some signaling systems generate...
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Intracellular Signaling Cascades01:24

Intracellular Signaling Cascades

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Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...
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Amplifying Signals via Second Messengers01:15

Amplifying Signals via Second Messengers

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Many receptor binding ligands are hydrophilic; they do not cross the cell membrane but bind to cell-surface receptors. Thus, their message must be relayed by second messengers present in the cell cytoplasm. There are several second messenger pathways, each with its own way of relaying information. For example, the G protein-coupled receptors can activate both phosphoinositol and cyclic AMP (cAMP) second messenger pathways. The phosphoinositol pathway is active when the receptor induces...
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Assembly of Signaling Complexes01:30

Assembly of Signaling Complexes

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Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
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関連する実験動画

Updated: Feb 23, 2026

Detection of Signaling Effector-Complexes Downstream of BMP4 Using in situ PLA, a Proximity Ligation Assay
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BMP経路における結合信号認識

Yaron E Antebi1, James M Linton1, Heidi Klumpe2

  • 1Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA.

Cell
|September 9, 2017
PubMed
まとめ

骨形態遺伝タンパク質 (BMP) 経路は,複雑な信号処理のためにリガンドの組み合わせを使用します. 細胞はレセプター発現を変えることで 比率感知やバランス検出などの計算を行うことができます

キーワード:
BMP についてスマッド骨の形態遺伝タンパク質多様性乱交性受容体-リガンドの相互作用シグナル認識シグナル処理信号経路

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Dissecting Multi-protein Signaling Complexes by Bimolecular Complementation Affinity Purification BiCAP
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関連する実験動画

Last Updated: Feb 23, 2026

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Dissecting Multi-protein Signaling Complexes by Bimolecular Complementation Affinity Purification BiCAP
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科学分野:

  • セルラー信号
  • 分子生物学
  • 生物化学

背景:

  • 骨形態遺伝タンパク質 (BMP) 信号には,複数の結合体と受容体間の乱交的相互作用が含まれています.
  • 信号処理におけるこれらの複雑な相互作用の機能的意義は不明であり,しばしば冗長性または柔軟性によるものである.

研究 の 目的:

  • マルチリガンド入力から生じるBMP経路の信号処理能力を明らかにする.
  • 競合する受容体-リガンドの相互作用が特定の細胞計算にどのように貢献するかを理解する.
  • 細胞が代替受容体発現を通してこれらの計算を調節する方法を探求する.

主な方法:

  • BMP経路内の競合レセプター-リガンド相互作用の分析
  • 相対的なリガンドレベルに基づく信号処理計算のモデリング.
  • 代替受容体変異表現による計算の細胞選択の調査.

主要な成果:

  • BMP経路は,比率計検知,バランス検知,および不均衡検知を含むマルチリガンド入力で特定の計算を実行します.
  • これらの計算は,ライガンドと受容体の間の競争的相互作用から直接派生する.
  • 細胞は,異なる受容体変数を表現することによって,異なる計算戦略を動的に選択することができます.

結論:

  • BMP経路におけるプロミスキュアスの受容体-リガンドの相互作用は,信号処理に直接的な役割を果たし,定量的な細胞制御を可能にします.
  • この発見は,BMPリガンドを用いて細胞反応を制御するための操作原理を確立しています.
  • 同様の信号処理原理は,他の乱交信号経路にも適用できる.