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Related Concept Videos

Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

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Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
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Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

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Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
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Tagging and Fusion Proteins01:24

Tagging and Fusion Proteins

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Proteins are involved in several cellular processes and biochemical reactions. Analyzing a specific protein of interest requires it to be isolated from the other proteins in the cell. This is achieved by overexpressing the specific gene in a suitable host to produce large quantities of the target protein. A tag or label is recombined with the gene to produce a fusion protein containing the target protein and the tag. The tags on these fusion proteins can then be used for easy detection and...
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Structural Protein Function01:56

Structural Protein Function

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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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Protein-protein Interfaces02:04

Protein-protein Interfaces

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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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Related Experiment Video

Updated: May 31, 2025

Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues
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Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues

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Conditional Split Inteins: Adaptable Tools for Programming Protein Functions.

Callum Shepherd1, Makeba Lawson-Williams1, Alexandria Holland1

  • 1School of Pharmacy & Biomolecular Sciences, Faculty of Health, Innovation, Technology and Science, Liverpool John Moores University, James Parsons Building, Byrom Street, Liverpool L3 3AF, UK.

International Journal of Molecular Sciences
|January 25, 2025
PubMed
Summary
This summary is machine-generated.

Split inteins enable precise control over protein activity through protein trans-splicing. This review explores their applications and classification for advanced protein engineering strategies.

Keywords:
conditionalityprotein trans-splicingsplit inteins

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Synthetic Biology

Background:

  • Split inteins are protein fragments that mediate protein trans-splicing.
  • This process reconstitutes a functional protein from two separate polypeptide chains.
  • Intein-mediated protein splicing offers spatiotemporal control over protein activity.

Purpose of the Study:

  • To review current applications of split inteins.
  • To discuss the mechanistic basis for novel split intein classification.
  • To provide guidance for intein and extein engineering.

Main Methods:

  • Review of existing literature on split intein mechanisms and applications.
  • Analysis of factors influencing conditional protein splicing.
  • Discussion of intein and extein engineering strategies.

Main Results:

  • Split inteins facilitate conditional regulation of protein function.
  • Understanding split intein mechanisms aids in novel species classification.
  • Engineering strategies can leverage split inteins for targeted protein activity.

Conclusions:

  • Split inteins are powerful tools for engineering biology.
  • Further research into split intein classification and engineering will advance protein design.
  • Conditional protein splicing offers novel approaches for controlling biological systems.