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Related Concept Videos

Apoptosis01:30

Apoptosis

Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size reduction of the tissue.
Cellular Injury V: Apoptosis and Autophagy01:22

Cellular Injury V: Apoptosis and Autophagy

Cells respond to damage and stress through highly coordinated processes that decide whether they survive or undergo controlled self-destruction. Two major pathways involved in this regulation are apoptosis, a type of programmed cell death, and autophagy, a survival mechanism that helps cells adapt to adverse conditions.ApoptosisApoptosis removes aged or injured cells to maintain tissue balance. During this process, the cell shrinks, chromatin condenses and fragments, and membrane-bound...
The Intrinsic Apoptotic Pathway01:31

The Intrinsic Apoptotic Pathway

Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...

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Related Experiment Video

Updated: Jun 24, 2026

The CryoAPEX Method for Electron Microscopy Analysis of Membrane Protein Localization Within Ultrastructurally-Preserved Cells
11:45

The CryoAPEX Method for Electron Microscopy Analysis of Membrane Protein Localization Within Ultrastructurally-Preserved Cells

Published on: February 27, 2020

A novel representation for apoptosis protein subcellular localization prediction using support vector machine.

Li Zhang1, Bo Liao, Dachao Li

  • 1School of Computer and Communication, Hunan University, Changsha Hunan 410082, China.

Journal of Theoretical Biology
|March 31, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces a novel method for predicting the subcellular location of apoptosis proteins by analyzing amino acid position distribution. This approach enhances understanding of programmed cell death mechanisms.

Related Experiment Videos

Last Updated: Jun 24, 2026

The CryoAPEX Method for Electron Microscopy Analysis of Membrane Protein Localization Within Ultrastructurally-Preserved Cells
11:45

The CryoAPEX Method for Electron Microscopy Analysis of Membrane Protein Localization Within Ultrastructurally-Preserved Cells

Published on: February 27, 2020

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Computational Biology

Background:

  • Apoptosis, or programmed cell death, is crucial for organism development.
  • Understanding the subcellular location of apoptosis proteins is key to elucidating apoptosis mechanisms.

Purpose of the Study:

  • To propose a novel method for predicting the subcellular location of apoptosis proteins.
  • To improve the accuracy of subcellular location prediction using protein sequence information.

Main Methods:

  • Introduction of a novel distance frequency calculation method based on amino acid position distribution.
  • Segmentation of protein sequences into parts to capture local features.
  • Application of support vector machines (SVM) for subcellular location prediction.

Main Results:

  • The proposed novel representation of protein sequences significantly improves prediction accuracy.
  • Jackknife testing confirmed the enhanced predictive performance of the method.

Conclusions:

  • The novel distance frequency approach offers a more accurate way to predict protein subcellular localization.
  • This method aids in understanding the complex mechanisms of apoptosis by providing critical protein location data.