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Related Concept Videos

Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

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Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
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Assembly of Signaling Complexes01:30

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Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
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Membrane Domains01:18

Membrane Domains

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The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
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For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
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Conserved Binding Sites01:49

Conserved Binding Sites

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Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
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Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

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Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
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What Have We Learned from SH2 Domains?

Bruce J Mayer1

  • 1Raymond and Beverly Sackler Laboratory of Genetics and Molecular Medicine, Department of Genetics and Genome Sciences, University of Connecticut School of Medicine, 400 Farmington Avenue, Farmington, CT, USA. bmayer@uchc.edu.

Methods in Molecular Biology (Clifton, N.J.)
|January 17, 2017
PubMed
Summary

Early studies on Src homology 2 (SH2) domains revealed the critical function of modular binding domains in cellular signaling. These foundational discoveries shaped our understanding of signaling logic, design principles, and evolutionary paths.

Keywords:
Cell signalingModular binding domainsTyrosine phosphorylation

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Area of Science:

  • Molecular Biology
  • Cellular Signaling
  • Protein Interactions

Background:

  • Modular binding domains are crucial for cellular signaling pathways.
  • Early research on SH2 domains provided foundational insights into these mechanisms.
  • Understanding these domains is key to deciphering cell communication.

Purpose of the Study:

  • To highlight the pivotal role of SH2 domains in understanding cell signaling.
  • To review key concepts derived from SH2 domain research.
  • To explore the evolutionary implications of modular binding domains.

Main Methods:

  • Review of seminal studies on SH2 domains.
  • Analysis of established principles in cell signaling.
  • Conceptual synthesis of research findings.

Main Results:

  • SH2 domains exemplify the importance of modular binding domains.
  • Early SH2 domain research established core principles of signal transduction.
  • These studies informed our understanding of signaling network evolution.

Conclusions:

  • Research on SH2 domains has been instrumental in advancing cell signaling knowledge.
  • The principles learned from SH2 domains apply broadly to modular binding domains.
  • Understanding these domains is essential for future discoveries in cell biology.