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Electron Transport Chain: Complex III and IV

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During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...

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Updated: Jul 17, 2026

Isolation and Characterization of Intact Phycobilisome in Cyanobacteria

Isolation and Characterization of Intact Phycobilisome in Cyanobacteria

Published on: November 10, 2021

Cyanobacterial NADPH dehydrogenase complexes.

Teruo Ogawa¹, Hualing Mi

¹National Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai 200032, China. ogawater@xd6.so-net.ne.jp

Photosynthesis Research

|February 7, 2007

Summary

Cyanobacteria utilize distinct NADPH dehydrogenase (NDH-1) complexes for carbon dioxide uptake and energy processes. This review explores their structure, function, and evolutionary relationships compared to plant chloroplast NDH-1.

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Last Updated: Jul 17, 2026

Isolation and Characterization of Intact Phycobilisome in Cyanobacteria

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Published on: November 10, 2021

Simultaneous Measurement of Superoxide/Hydrogen Peroxide and NADH Production by Flavin-containing Mitochondrial Dehydrogenases

Simultaneous Measurement of Superoxide/Hydrogen Peroxide and NADH Production by Flavin-containing Mitochondrial Dehydrogenases

Published on: February 24, 2018

Area of Science:

Biochemistry
Molecular Biology
Photosynthesis Research

Background:

NADPH dehydrogenase (NDH-1) complexes are crucial in cyanobacteria for CO(2) uptake, cyclic electron transport around photosystem I, and respiration.
Cyanobacterial NDH-1 complexes possess unique subunits facilitating carbon dioxide concentration mechanisms.
Chloroplastic NDH-1 in plants shares functional similarities with cyanobacterial NDH-1, particularly in cyclic electron transport (chlororespiration).

Purpose of the Study:

To review the structure, function, and phylogeny of cyanobacterial NDH-1 complexes.
To compare cyanobacterial NDH-1 functions with those of the chloroplastic NDH-1 complex in plants.
To highlight the unique role of specific subunits in cyanobacterial CO(2) uptake.

Main Methods:

Mini-review synthesizing existing research on cyanobacterial and chloroplastic NDH-1 complexes.
Comparative analysis of structural and functional data.
Phylogenetic analysis of NDH-1 subunits.

Main Results:

Cyanobacteria possess multiple, functionally specialized NDH-1 complexes.
Unique subunits in cyanobacterial NDH-1 are key for efficient CO(2) uptake.
Functional parallels exist between cyanobacterial NDH-1 and plant chloroplastic NDH-1 in energy metabolism.

Conclusions:

Cyanobacterial NDH-1 complexes are vital for carbon fixation and energy transduction.
The evolutionary and functional divergence of NDH-1 complexes provides insights into photosynthesis and respiration.
Understanding these complexes aids in improving photosynthetic efficiency and carbon capture strategies.