'Protein linked' diaporamas de présentation

Chapter 11 Cell Communication

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Signal Transduction Pathways

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Introduction to the biological pathway

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Introduction to the biological pathway

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The Sodium-Potassium Pump

The Sodium-Potassium Pump. Consists of molecules in the neuronal membrane Exchanges NA+ ions for K+ ions across the membrane Requires energy for active transport of ions across the membrane. Membrane Permeability Determines Membrane Voltage. Membrane Voltage Determines Membrane Permeability.

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OVERVIEW: Signals for cell surface receptors (hydrophilic):

OVERVIEW: Signals for cell surface receptors (hydrophilic): - membrane-bound (contact-dependent signaling) - released into extracellular space - local (paracrine) or long-distance (endocrine) signaling Signals for intracellular receptors (hydrophobic, on carrier proteins):

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G Protein Linked Receptors

G Protein Linked Receptors. Introduction. G-protein-linked receptors are the largest family of cell-surface receptors. More than 100 members have already been defined in mammals.

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Cell Communication & Signal Transduction

Cell Communication & Signal Transduction. Ch. 11. Cell Communication. In multicelled organisms, individual cells must communicate and join with one another to create a harmonious organism. Cell junctions can be classified in four functional groups: Tight junctions Desmosomes Gap junctions

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Introduction

Introduction. Elaborate, complex, intracellular and intercellular. Animal cells complex system of proteins e.g. Receptor proteins (surface and intracellular) Protein kinases Protein phosphatases GTP-binding proteins (G-proteins). Signal molecules include proteins, nucleotides, steroid

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AP Biology

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TRANSMITTERS

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Chemokines and Chemokine Receptors

Chemokines (Greek -kinos, movement) are a family of small cytokines, or signaling proteins secreted by cells. Their name is derived from their ability to induce directed chemotaxis in nearby responsive cells; they are chemotactic cytokines. Cytokine proteins are classified as chemokines according to behavior and structural characteristics.

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