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Related Concept Videos

The Photochemical Reaction Center01:29

The Photochemical Reaction Center

Reaction centers are pigment-protein complexes that initiate energy conversion from photons to chemical entities. Therefore, photochemical reaction center is a more appropriate term that describes these complexes. The Nobel laureates Robert Emerson and William Arnold provided the first experimental evidence of photochemical reaction centers by demonstrating the participation of nearly 2,500 chlorophyll molecules for the release of just one molecule of oxygen. Despite thousands of photosynthetic...
Photosystem I01:27

Photosystem I

Although structurally similar to photosystem II (PSII), photosystem I (PSI) is has a different electron supplier and electron acceptor.
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

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, whereas...
Photosystems01:32

Photosystems

Photosystems are multiprotein complexes that form the functional units of photosynthesis in plants, algae, and cyanobacteria. They are found embedded in the membrane of tiny sac-like structures called thylakoids placed inside the chloroplast.
Functioning of Photosystems
Photosystems contain many pigment molecules, such as chlorophylls and carotenoids, arranged in a particular organization across two domains — the antenna complex and the reaction center. The main aim of the pigment molecules...
Photosystem II01:22

Photosystem II

The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across  two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment molecules...
The Antenna Complex01:15

The Antenna Complex

Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...

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Dynamic Light-Induced Protein Patterns at Model Membranes
07:10

Dynamic Light-Induced Protein Patterns at Model Membranes

Published on: February 23, 2024

Artificial photoactive proteins.

Reza Razeghifard1

  • 1Division of Math, Science, and Technology, Farquhar College of Arts & Science, Nova Southeastern University, Fort Lauderdale, FL 33314, USA. razeghif@nova.edu

Photosynthesis Research
|October 3, 2008
PubMed
Summary
This summary is machine-generated.

Scientists are designing synthetic proteins to harness solar energy, mimicking natural photosystems. These engineered proteins efficiently convert light into electron flow for renewable energy applications.

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Area of Science:

  • Biochemistry and biophysics
  • Renewable energy research
  • Synthetic biology

Background:

  • Solar energy is the most abundant renewable resource.
  • Natural photosystems convert light energy into electron flow using redox cofactors.
  • Proteins play a crucial role in tuning cofactor properties and arrangement for efficient energy conversion.

Purpose of the Study:

  • To review the literature on functional synthetic photoactive proteins.
  • To highlight elegant protein designs for harnessing solar energy.
  • To showcase the introduction of cofactors and photoactivity into synthetic proteins.

Main Methods:

  • Literature review of protein design and engineering studies.
  • Analysis of synthetic protein structures and their photoactivity.
  • Examination of cofactor integration and redox potential tuning in artificial systems.

Main Results:

  • Protein designers have created functional synthetic photoactive proteins.
  • Engineered proteins mimic natural photosystems' ability to generate electron flow.
  • Stable charge separation is achieved through precise cofactor arrangement.

Conclusions:

  • Synthetic photoactive proteins offer a promising route for solar energy utilization.
  • Protein engineering enables the creation of efficient artificial light-harvesting systems.
  • Further research in this area can lead to advanced renewable energy technologies.