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Inorganic Nitrogen Assimilation01:22

Inorganic Nitrogen Assimilation

Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme nitrate reductase...
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Structural Isomerism

Isomerism in Complexes
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Metal-Ligand Bonds

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Nitrosyl iron complexes--synthesis, structure and biology.

Hanna Lewandowska1, Monika Kalinowska, Kamil Brzóska

  • 1Institute of Nuclear Chemistry and Technology, Centre for Radiobiology and Biological Dosimetry, 16 Dorodna Str., 03-195, Warsaw, Poland.

Dalton Transactions (Cambridge, England : 2003)
|June 7, 2011
PubMed
Summary

Nitrosyl iron complexes, particularly dinitrosyl iron complexes (DNICs), are crucial for storing and stabilizing nitric oxide (NO) in biological systems. This review covers their synthesis, properties, and biological roles.

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Area of Science:

  • Bioinorganic Chemistry
  • Biophysics
  • Biochemistry

Background:

  • Nitric oxide (NO) plays vital roles in biological systems.
  • Nitrosyl iron complexes are formed in vivo in the presence of NO.
  • These complexes are considered a storage and stabilization form of NO within cells.

Purpose of the Study:

  • To review the latest knowledge on nitrosyl iron complexes.
  • To summarize key aspects for understanding their nature, interactions, and biological behavior.
  • To focus on dinitrosyl iron complexes (DNICs) due to their prevalence in biological samples.

Main Methods:

  • Literature review of recent advancements in nitrosyl iron complex research.
  • Focus on dinitrosyl iron complexes (DNICs) and some mononitrosyl heme proteins.
  • Brief overview of synthetic methodologies.

Main Results:

  • DNICs are prevalent in biological samples treated with NO.
  • The review synthesizes information on structure, chemical properties, and biological actions of DNICs.
  • Recent knowledge on mononitrosyls of heme proteins is also presented.

Conclusions:

  • Nitrosyl iron complexes, especially DNICs, are significant for NO homeostasis.
  • Understanding their properties is crucial for bioinorganic chemistry and medicine.
  • This review provides a comprehensive overview of current research findings.