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Related Concept Videos

Visual System01:26

Visual System

Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Midrange01:07

Midrange

A somewhat easy to compute quantitative estimate of a data set’s central tendency is its midrange, which is defined as the mean of the minimum and maximum values of an ordered data set.
Simply put, the midrange is half of the data set’s range. Similar to the mean, the midrange is sensitive to the extreme values and hence the prospective outliers. However, unlike the mean, the midrange is not sensitive to all the values of the data set that lie in the middle. Thus, it is prone to outliers and...
Instantaneous Velocity - II01:10

Instantaneous Velocity - II

Instantaneous velocity is the quantity that measures how fast an object is moving along its path. In other words, the instantaneous velocity of an object is the limit of the average velocity as the elapsed time approaches zero, or the derivative of displacement with respect to time. Like average velocity, the instantaneous velocity is a vector with the dimensions of length per unit time. Instantaneous velocity can have both positive and negative values. The instantaneous velocity can be...
Variance01:15

Variance

The deviations show how spread out the data are about the mean. A positive deviation occurs when the data value exceeds the mean, whereas a negative deviation occurs when the data value is less than the mean. If the deviations are added, the sum is always zero. So one cannot simply add the deviations to get the data spread. By squaring the deviations, the numbers are made positive; thus, their sum will also be positive.The standard deviation measures the spread in the same units as the data.
Flashbulb Memory01:16

Flashbulb Memory

A flashbulb memory is a highly vivid and detailed memory, often linked to events of significant emotional impact. These memories stand out in contrast to everyday memories due to their clarity and the precision with which they are recalled. The strong emotions associated with the event act as a catalyst, ensuring that specific details, such as one's location, actions, and even peripheral elements, are etched into memory with remarkable accuracy. For example, many people can vividly recall where...
Capillary Exchange01:28

Capillary Exchange

The cardiovascular system's chief role is to disseminate gases, nutrients, waste, and other substances to the body's cells. Small molecules like gases, lipids, and lipid-soluble substances directly diffuse through capillary wall endothelial cell membranes. Glucose, amino acids, and ions, including sodium, potassium, calcium, and chloride, use transporters for facilitated diffusion via membrane-specific channels. Glucose, ions, and bigger molecules may also pass through intercellular clefts.

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Updated: May 11, 2026

Spot Variation Fluorescence Correlation Spectroscopy for Analysis of Molecular Diffusion at the Plasma Membrane of Living Cells
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Spot Variation Fluorescence Correlation Spectroscopy for Analysis of Molecular Diffusion at the Plasma Membrane of Living Cells

Published on: November 12, 2020

SCFs in the new millennium.

E K Lee1, J A Diehl1

  • 11] Leonard and Madlyn Abramson Family Cancer Research Institute, Philadelphia, PA, USA [2] Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.

Oncogene
|April 30, 2013
PubMed
Summary
This summary is machine-generated.

The Skp1-Cul1-Fbox (SCF) ligase complex is crucial for targeted protein degradation, ensuring normal cell growth. Alterations in SCF ligase function are linked to cancer development.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Substrate-specific degradation is mediated by the ubiquitin proteasome system, primarily directed by E3 ubiquitin ligases.
  • Cullin-RING ligases (CRLs) are a major class of E3 ligases, utilizing cullin scaffold proteins to assemble substrate-recognition complexes.
  • The Skp1-Cul1-Fbox (SCF) ligase is a well-characterized CRL essential for regulating numerous cellular processes.

Purpose of the Study:

  • To review the current understanding of SCF ligase complex structure and function.
  • To highlight the role of SCF ligases in substrate degradation and cell cycle control.
  • To discuss the implications of SCF ligase dysfunction in cancer biology.

Main Methods:

  • Literature review of studies on ubiquitin proteasome system and CRLs.
  • Analysis of protein-protein interactions within CRL complexes.
  • Examination of the role of F-box proteins as substrate adaptors.

Main Results:

  • SCF ligases are multi-protein complexes comprising Skp1, Cul1, and F-box proteins, which recruit specific substrates.
  • SCF ligase activity is critical for the timely degradation of regulatory proteins, maintaining cellular homeostasis.
  • Dysregulation of SCF ligase components, particularly F-box proteins, is implicated in neoplastic transformation.

Conclusions:

  • SCF ligases are central regulators of protein turnover, essential for normal cell proliferation and development.
  • Understanding SCF ligase mechanisms provides insights into cellular control and disease pathogenesis.
  • Targeting SCF ligase pathways may offer therapeutic strategies for cancers driven by aberrant protein degradation.