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Related Concept Videos

Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
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Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
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The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
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How does a complex organism such as a human develop from a single cell? It all starts from a single fertilized egg which gives rise to a vast array of cell types, such as nerve cells, muscle cells, and epithelial cells that characterize the adult? Throughout development and adulthood, cellular differentiation leads cells to assume their final morphology and physiology. Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions.
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Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
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Related Experiment Video

Updated: Mar 7, 2026

Detection of Protein Palmitoylation in Cultured Hippocampal Neurons by Immunoprecipitation and Acyl-Biotin Exchange ABE
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Protein S-palmitoylation in cellular differentiation.

Mingzi M Zhang1, Howard C Hang2

  • 1Metabolic Engineering Research Laboratory, Science and Engineering Institutes, Agency for Science, Technology and Research, Singapore.

Biochemical Society Transactions
|February 17, 2017
PubMed
Summary

Protein S-palmitoylation, a reversible modification, controls protein function and cellular processes. This review covers methods to study palmitoylation and its role in development across eukaryotes.

Keywords:
S-palmitoylationcellular differentiationfatty-acylationlipidationposttranslational modification

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Protein S-palmitoylation is a reversible post-translational modification crucial for regulating protein function.
  • It influences protein stability, trafficking, activity, and interactions with other molecules and membranes.
  • Technological advancements have enabled global studies revealing its pervasive role in eukaryotic cells.

Purpose of the Study:

  • To review strategies and tools for analyzing *in vivo* protein palmitoylation.
  • To discuss methods for interrogating the function of palmitoylation enzymes (palmitoyltransferases and depalmitoylases).
  • To highlight proteins and enzymes involved in S-palmitoylation linked to cellular differentiation and development.

Main Methods:

  • Review of existing literature and methodologies.
  • Discussion of biochemical and genetic approaches for studying protein palmitoylation.
  • Analysis of proteomic and functional studies.

Main Results:

  • S-palmitoylation provides spatiotemporal control over diverse protein functions.
  • It plays a significant role in coordinating biological processes during cellular state transitions.
  • Numerous palmitoylated proteins and enzymes are associated with development and differentiation.

Conclusions:

  • Protein S-palmitoylation is a fundamental regulatory mechanism in eukaryotes.
  • Understanding palmitoylation is key to deciphering cellular differentiation and development.
  • Further research into palmitoylation enzymes and substrates will illuminate complex biological pathways.