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Protein Complex Assembly02:41

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
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Protein Complexes with Interchangeable Parts01:57

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Related Experiment Video

Updated: Jun 22, 2026

Extraction of Venom and Venom Gland Microdissections from Spiders for Proteomic and Transcriptomic Analyses
10:25

Extraction of Venom and Venom Gland Microdissections from Spiders for Proteomic and Transcriptomic Analyses

Published on: November 3, 2014

Protein complexes in snake venom.

R Doley1, R M Kini

  • 1Protein Science Laboratory, Department of Biological Sciences, Faculty of Science, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore. doley@tezu.ernet.in

Cellular and Molecular Life Sciences : CMLS
|June 5, 2009
PubMed
Summary
This summary is machine-generated.

Snake venom protein complexes, formed via covalent or non-covalent bonds, show enhanced pharmacological activity and toxicity compared to individual proteins. These complexes can alter target binding and reveal new molecular targets during envenomation.

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High Throughput Quantitative Expression Screening and Purification Applied to Recombinant Disulfide-rich Venom Proteins Produced in E. coli
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High Throughput Quantitative Expression Screening and Purification Applied to Recombinant Disulfide-rich Venom Proteins Produced in E. coli

Published on: July 30, 2014

Area of Science:

  • Biochemistry
  • Toxicology
  • Molecular Biology

Background:

  • Snake venoms are complex mixtures of bioactive proteins and polypeptides.
  • While many venom components exist as monomers, some form functional complexes.
  • These protein complexes are crucial for the venom's overall pharmacological activity and toxicity.

Purpose of the Study:

  • To elucidate the structure and function of snake venom protein complexes.
  • To investigate the role of these complexes in the pathophysiology of snake envenomation.
  • To understand how complex formation influences protein interactions and target recognition.

Main Methods:

  • Analysis of protein-protein interactions within snake venom.
  • Characterization of complex formation via covalent and/or non-covalent interactions.
  • Assessment of pharmacological activity of venom complexes versus individual components.

Main Results:

  • Snake venom complexes exhibit significantly higher pharmacological activity than their monomeric subunits.
  • Complex formation can enhance binding affinity to target molecules by reducing non-specific interactions.
  • Protein-protein interactions within complexes can expose novel binding sites and targets.

Conclusions:

  • Snake venom protein complexes are key determinants of venom toxicity.
  • Complex formation is a critical mechanism for modulating protein function and enhancing envenomation effects.
  • Understanding these complexes offers insights into venom evolution and potential therapeutic strategies.