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Related Concept Videos

Nuclear Localization Signals and Import01:46

Nuclear Localization Signals and Import

Proteins targeted to the nucleus carry short stretches of amino acid sequences called the nuclear localization signal or NLS. Classical nuclear localization signals are of two types: monopartite and bipartite NLS. Monopartite classical NLS (cNLS) consists of a single cluster of 4-8 amino acids. Bipartite cNLS consists of two clusters of  2-3 amino acids and a 9-12 residue long proline-rich linker bridging the two clusters. Signal clusters are rich in positively charged amino acids such as...
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Three-Dimensional Microscopy in Microbiology

Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...
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Nuclear protein sorting is the selective trafficking of histones, polymerases, gene regulatory proteins into the nucleus and exporting RNAs and ribosomes to the cytosol. It is a tightly controlled process that regulates gene expression within a cell.
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The homogenate obtained after cell lysis contains various membrane-bound organelles that can be further separated into pure fractions by subcellular fractionation. These isolates are used to study specific cellular components, analyze localized protein activity, and are even employed in diagnostics. Fractionation is typically achieved using centrifugation methods, the most common being density-gradient and differential centrifugation.
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Related Experiment Video

Updated: Jun 3, 2026

Multi-color Localization Microscopy of Single Membrane Proteins in Organelles of Live Mammalian Cells
11:06

Multi-color Localization Microscopy of Single Membrane Proteins in Organelles of Live Mammalian Cells

Published on: June 30, 2018

Compressed learning and its applications to subcellular localization.

Zhong-Long Zheng1, Li Guo, Jiong Jia

  • 1Department of Computer Science, Zhejiang Normal University, China. shonglong@zjnu.cn

Protein and Peptide Letters
|March 30, 2011
PubMed
Summary

Predicting protein subcellular localization is crucial for biological applications. This study introduces a novel compressed learning method inspired by Compressed Sensing (CS) theory, merging feature selection and dimension reduction for improved accuracy in complex biological systems.

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Last Updated: Jun 3, 2026

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Three-dimensional Imaging of Bacterial Cells for Accurate Cellular Representations and Precise Protein Localization
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Three-dimensional Imaging of Bacterial Cells for Accurate Cellular Representations and Precise Protein Localization

Published on: October 29, 2019

Area of Science:

  • Bioinformatics
  • Computational Biology
  • Machine Learning in Biology

Background:

  • Accurate prediction of protein subcellular localization is a significant challenge in biological applications.
  • Existing machine learning methods often prioritize classification schemes over simplifying biological system complexity.
  • Traditional bio-data analysis involves separate feature selection and classification steps.

Purpose of the Study:

  • To develop a novel methodology that integrates feature selection and dimension reduction for enhanced protein subcellular localization prediction.
  • To address the complexity of biological systems by proposing a compressed learning approach.
  • To improve the accuracy of predicting protein subcellular localization, particularly for Gram-negative bacterial proteins.

Main Methods:

  • A novel methodology inspired by Compressed Sensing (CS) theory was proposed.
  • The method performs compressed learning with a sparseness criterion, merging feature selection and dimension reduction.
  • This approach aims to decrease biological system complexity while enhancing predictive accuracy.

Main Results:

  • Experimental results demonstrated the effectiveness of the proposed sparse methods.
  • The methodology successfully decreased the complexity of the biological system under study.
  • Protein subcellular localization accuracy was significantly increased.

Conclusions:

  • The proposed sparse compressed learning methods show great promise for tackling complex biological problems.
  • This approach offers a more integrated and efficient way to analyze bio-data for localization prediction.
  • The findings are particularly relevant for predicting the subcellular localization of Gram-negative bacterial proteins.