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Related Concept Videos

Protein Folding01:25

Protein Folding

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Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
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Protein Organization01:24

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Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
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Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
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Within a biological system, the DNA encodes the RNA, and the nucleotide sequence in the RNA further defines the amino acid sequence in the protein. This is referred to as “The Central Dogma of Molecular Biology” - a term coined by Francis Crick.  Central dogma is a firm principle in biology that defines the flow of genetic information within any life form. The two fundamental steps in central dogma are - transcription and translation.
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Ribosomes01:27

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Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells that synthesize large quantities of protein—such as secretory cells in the human pancreas—can contain millions of ribosomes.
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Electron Cryotomography of Bacterial Cells
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Rendering protein structures inside cells at the atomic level with Unreal Engine.

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  • 1Division of CryoEM and Bioimaging, SSRL, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA 94025, USA.

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|March 18, 2024
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Summary
This summary is machine-generated.

Cryo-electron tomography (CryoET) allows near-atomic resolution of cellular macromolecules. A new video game engine approach enables real-time visualization of these molecules within their native cellular environments.

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Area of Science:

  • Cellular and Molecular Biology
  • Computational Biology
  • Biophysics

Background:

  • Cryo-electron tomography (CryoET) advances cellular and macromolecular structure determination.
  • Visualizing complex cellular environments at atomic resolution remains a significant challenge.
  • Real-time computational rendering of millions of molecules is a key hurdle.

Approach:

  • Leveraged a video game engine for high-performance visualization of biological macromolecules.
  • Developed tools for interactive navigation within simulated cellular environments.
  • Created software to convert CryoET-derived protein structures into explorable game engine scenes.

Key Points:

  • Demonstrated real-time, atomic-level rendering of massive biological macromolecules.
  • Enabled visualization within the native cellular context.
  • Facilitated interactive exploration of cellular structures.

Conclusions:

  • The video game engine approach overcomes computational limitations in visualizing cellular complexity.
  • This method enhances the understanding of macromolecular structures and their interactions in situ.
  • Offers a powerful new tool for biological research and education.