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Related Concept Videos

Complexation Equilibria: Overview01:23

Complexation Equilibria: Overview

Complexation reactions take place when dative or coordinate covalent bonds form between metal ions and ligands. The compounds formed in these reactions are called coordination compounds. The number of bonds formed between the metal ion and the ligands is called its coordination number. Generally, most metal ions in an aqueous solution are solvated by water molecules and thus exist as aqua complexes.
The equilibrium constant of the complexation reaction is represented as the formation constant...
Ladder Diagrams: Complexation Equilibria01:07

Ladder Diagrams: Complexation Equilibria

Ladder diagrams are useful for evaluating equilibria involving metal-ligand complexes. The vertical scale of the ladder diagram represents the concentration of unreacted or free ligand, pL. The horizontal lines on the scale depict the log of stepwise formation constants for metal-ligand complexes and indicate the dominant species in all the regions.
The formation constant, K1, for the formation of Cd(NH3)2+ complex from cadmium and ammonia is 3.55 × 102. Log K1 (i.e. pNH3) is 2.55, and...
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
Complex Numbers01:29

Complex Numbers

The real number system cannot represent the square root of a negative number, which restricts solutions for certain equations, such as quadratics with negative discriminants. To address this, the complex number system was developed, introducing the imaginary unit i, where i = √(-1). This extension allows for the representation of all roots, including those involving negative radicands.A complex number is written in the form x + yi, where x and y are real numbers. Here, x represents the real...
Formation of Complex Ions03:45

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...

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Measurement of Spatial Stability in Precision Grip
09:36

Measurement of Spatial Stability in Precision Grip

Published on: June 4, 2020

Getting a grip on complexes.

Yan Nie1, Cristina Viola, Christoph Bieniossek

  • 1European Molecular Biology Laboratory (EMBL), Grenoble Outstation and Unit of Virus Host-Cell Interactions (UVHCI), UJF-EMBL-CNRS, UMR 5233, 6 rue Jules Horowitz, 38042 Grenoble CEDEX 9, France.

Current Genomics
|June 2, 2010
PubMed
Summary
This summary is machine-generated.

Advances in genomics and proteomics reveal the importance of multiprotein complexes in biological systems. New technologies are needed to study these complex structures and their functions at a molecular level.

Keywords:
ACEMBLBEVSProteomecomplexomics.interactomemultiBacmultigene expressionmultiprotein assembliesroboticsstructural genomics

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Purification of Native Complexes for Structural Study Using a Tandem Affinity Tag Method

Published on: July 27, 2016

Area of Science:

  • Molecular Biology
  • Systems Biology
  • Structural Biology

Background:

  • Genomic and proteomic research is rapidly advancing our understanding of biological systems.
  • Multiprotein complexes are crucial for biological activity, acting as fundamental units of cellular function.
  • Current technologies are insufficient for the high-throughput analysis of large multiprotein assemblies.

Purpose of the Study:

  • To review current efforts in developing technologies for studying multiprotein complexes.
  • To highlight the need for new technologies to analyze the complexome in eukaryotes.
  • To emphasize the importance of understanding the structure and function of these assemblies at the molecular level.

Main Methods:

  • Review of existing structural genomics efforts and technologies.
  • Analysis of advancements in bioinformatics and mass spectrometry.
  • Discussion of emerging techniques for studying protein-protein interactions and complexes.

Main Results:

  • Significant progress has been made in deciphering genomes and understanding protein interactions.
  • Multiprotein complexes are recognized as key players in cellular processes.
  • There is a critical need for technological innovation to meet the demands of complexome analysis.

Conclusions:

  • Understanding the architecture and function of multiprotein complexes is essential for systems biology.
  • Development of new technologies is imperative for the comprehensive study of the complexome.
  • Future research should focus on producing and analyzing large-scale multiprotein assemblies.