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Related Concept Videos

Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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Assembly of Signaling Complexes01:30

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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.
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G-Protein Gated Ion Channels

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GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
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Interactions Between Signaling Pathways01:19

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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.
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Signal Sequences and Sorting Receptors01:41

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Signal sequences are short amino acid sequences that guide newly synthesized proteins to their proper location within the cell. Classical signal sequences are fifteen to sixty amino acids long and present at the N-terminus of a polypeptide chain. Each signal sequence has a conserved segment of basic residues towards their N terminus, a hydrophobic core, and a C-terminus rich in polar residues. The C-terminus also contains a signal cleavage site and features a -3 -1 sequence motif. The -3-1...
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The Retina01:32

The Retina

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The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
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Updated: Feb 24, 2026

Light-Induced Molecular Adsorption of Proteins Using the PRIMO System for Micro-Patterning to Study Cell Responses to Extracellular Matrix Proteins
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Visualising pattern recognition receptor signalling.

Charlotte Macleod1, Clare E Bryant2

  • 1Department of Veterinary Medicine, The University of Cambridge, Madingley Road, Cambridge CB3 0ES, U.K.

Biochemical Society Transactions
|August 27, 2017
PubMed
Summary
This summary is machine-generated.

Pattern recognition receptor (PRR) signaling is vital for host defense but disrupted in many diseases. Advanced microscopy visualizes PRR signaling at the single-protein level, offering therapeutic insights for inflammatory conditions.

Keywords:
Toll-like receptorsmicroscopynod-like receptors

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Area of Science:

  • Immunology
  • Cell Biology
  • Biophysics

Background:

  • Pattern recognition receptors (PRRs) are crucial for innate immunity, detecting pathogens and initiating host defense.
  • Dysregulated PRR signaling is linked to various diseases, including infections, cancer, and autoimmune disorders.
  • Understanding PRR signaling mechanisms is key for developing targeted therapies for inflammatory diseases.

Purpose of the Study:

  • To review microscopy techniques for dissecting PRR signaling pathways.
  • To highlight the application of advanced imaging in visualizing PRR function at the single-molecule level.
  • To focus on microscopy approaches for Toll-like receptor (TLR) and NOD-like receptor (NLR) signaling.

Main Methods:

  • Review of current literature on microscopy techniques applied to PRR signaling.
  • Discussion of advanced imaging modalities like super-resolution microscopy and live-cell imaging.
  • Focus on techniques enabling visualization of receptor-ligand interactions and downstream signaling events.

Main Results:

  • Microscopy, particularly super-resolution and live-cell imaging, allows unprecedented visualization of PRR dynamics.
  • These techniques enable the study of individual receptor behavior and complex signaling networks.
  • Specific examples of TLR and NLR pathway visualization using advanced microscopy are presented.

Conclusions:

  • Advanced microscopy provides powerful tools to dissect complex PRR signaling pathways.
  • Visualizing PRR signaling at the single-protein level offers new avenues for therapeutic intervention in immune-related diseases.
  • Continued development and application of microscopy will deepen our understanding of innate immunity.