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Dietary Connections01:23

Dietary Connections

In biological systems, most metabolic pathways are interconnected. The cellular respiration processes that convert glucose to ATP—such as glycolysis, pyruvate oxidation, and the citric acid cycle—tie into those that break down other organic compounds. As a result, various foods—from apples to cheese to guacamole—end up as ATP. In addition to carbohydrates, food also contains proteins and lipids—such as cholesterol and fats. All of these organic compounds are used as energy sources to produce...
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Protein Digestion

Protein digestion begins in the stomach, where the highly acidic environment can easily disrupt protein structure by exposing the peptide bonds of polypeptide chains. After polypeptide chains are broken into individual amino acids by a series of digestive enzymes, the amino acids are transported to the liver via the bloodstream to produce energy.
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Protein Dynamics in Living Cells

Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
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Protein Denaturation

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Personal Identity

Personal identity is the deeply felt sense of self that individuals cultivate over time, intricately woven from intrinsic qualities they consider essential to their existence—qualities such as morality, intelligence, and friendliness. These attributes serve as vital internal benchmarks, guiding individuals in evaluating whether their actions resonate with their true selves.When personal identity takes center stage in one's life, individuals often emphasize their distinctiveness, highlighting...
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Related Experiment Video

Updated: May 12, 2026

PTR-ToF-MS Coupled with an Automated Sampling System and Tailored Data Analysis for Food Studies: Bioprocess Monitoring, Screening and Nose-space Analysis
08:43

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Dynamic personalities of proteins.

Katherine Henzler-Wildman1, Dorothee Kern

  • 1Department of Biochemistry, Howard Hughes Medical Institute, Brandeis University, Waltham, Massachusetts 02454, USA.

Nature
|December 14, 2007
PubMed
Summary

Understanding protein dynamics is key to cellular function. New methods in structural biology aim to capture proteins in action at atomic resolution by adding the dimension of time.

Area of Science:

  • Biochemistry and Molecular Biology
  • Structural Biology
  • Biophysics

Background:

  • Proteins are fundamental to cellular processes.
  • While static protein structures are known, their dynamic nature dictates function.
  • Observing protein dynamics in real-time is crucial for understanding biological mechanisms.

Purpose of the Study:

  • To highlight the importance of protein dynamics in cellular function.
  • To emphasize the need for time-resolved structural biology.
  • To describe the goal of visualizing proteins in action at atomic resolution.

Main Methods:

  • Discusses the limitations of static structural biology.
  • Proposes the integration of time as a fourth dimension in structural studies.

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Genetic Incorporation of Biosynthesized L-dihydroxyphenylalanine (DOPA) and Its Application to Protein Conjugation
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  • Focuses on the conceptual requirements for real-time atomic resolution imaging.

    • Main Results:

    • Static protein structures provide limited insight into dynamic functions.
    • Protein 'personality' is defined by its dynamic character.
    • Capturing proteins in action requires a four-dimensional approach (space and time).

    Conclusions:

    • Dynamic character, not static structure, governs protein function.
    • Visualizing proteins in real-time at atomic resolution is a major goal.
    • Adding time to structural biology is essential for detailed atomic descriptions.