electron transport chain
Let an agent explain electron transport chains and their kinds, relay the mitochondrial, photosynthetic, bacterial and P450 chains from biochemistry references, describe chemiosmotic coupling and disease relevance, and distinguish the chain from glycolysis and the citric acid cycle.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain electron transport chains and their kinds, relay the mitochondrial, photosynthetic, bacterial and P450 chains from biochemistry references, describe chemiosmotic coupling and disease relevance, and distinguish the chain from glycolysis and the citric acid cycle.
A series of protein complexes and electron carriers in membranes that transfer electrons from donors to acceptors through redox reactions, pumping protons to create a gradient that drives ATP synthesis, as in the mitochondrial respiratory chain of complexes I to IV with ubiquinone and cytochrome c ending at oxygen, the photosynthetic electron transport chain of thylakoid membranes linking photosystems II and I, bacterial and archaeal chains with diverse acceptors, and microsomal P450-containing chains for drug and steroid metabolism; the chain is central to bioenergetics.
What it is for: Not applicable; a biochemical system.
It can be explain the chain and kinds; relay chemiosmotic coupling; describe disease relevance; distinguish from other pathways.
Distinguishing features
Sequential redox transfer
Proton pumping
Chemiosmotic coupling
Multiple variants
What it looks like
Not a visible object; membrane complexes passing electrons.
Physical character
mitochondrial complexes: 4 count - plus ATP synthase as complex V
ATP yield per NADH: about 2.5 ATP
proton gradient: about 0.5-1 pH units - across inner membrane
How it is recognised
Membrane redox chain driving ATP synthesis
Mitochondrial respiratory chain, photosynthetic chain, bacterial chains, P450-containing chains
Glycolysis and the citric acid cycle supply electrons; ATP synthase uses the gradient
Related models
is a kind of - in registry terms
drives - through the proton gradient
is explained by - Mitchell theory
receives electrons from - via NADH and FADH2
In practice
Families and kinds
mitochondrial respiratory electron transport chain
photosynthetic electron transport chain in thylakoids
bacterial and archaeal electron transport chains with alternative acceptors
P450-containing microsomal electron transport chains
anaerobic respiration chains
Identifiers
GO GO:0022900 electron transport chain
MeSH D004583 electron transport
Standards and regulation
No regulation; standard biochemical definitions
Clinical guidelines for mitochondrial diseases
Failure modes and hazards
Confusing the chain with the citric acid cycle
Miscounting ATP yields
Agents giving personal medical advice on mitochondrial disease
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What the chain is.
Science.
Definition
Definition and mechanism.
Definition
Definition.
- What is an electron transport chain, and how do complexes I to IV pass electrons and pump protons? definition
- Is the question about the mitochondrial chain, the photosynthetic chain, bacterial chains or P450 chains? boundary
Kinds
Kinds.
Kinds
Kinds.
- How do the respiratory, photosynthetic, bacterial and P450-containing chains differ? definition
- Which entry fits the specific chain? action
Energy Bioenergetics.
Science.
Chemiosmosis
Chemiosmotic coupling.
Chemiosmosis
Chemiosmosis.
- How does the proton gradient drive ATP synthase, and what is the ATP yield? provenance
- Which references are standard? provenance
Inhibitors
Inhibitors and uncouplers.
Inhibitors
Inhibitors.
- How do inhibitors and uncouplers such as cyanide and dinitrophenol affect the chain, in general terms? provenance
- Which entry fits oxidative phosphorylation? action
Medicine Disease.
Clinical.
Disease
Mitochondrial disease.
Disease
Disease.
- How do defects in the chain cause mitochondrial diseases, and how are they diagnosed, in general terms? provenance
- Is the user asking about their own condition, which needs a specialist? boundary
ROS
Reactive oxygen species.
ROS
ROS.
- How does the chain produce reactive oxygen species, and what roles do they play in ageing and disease, with findings attributed? provenance
- Which sources are cited? provenance
Context Evolution and history.
Context.
Evolution
Evolution.
Evolution
Evolution.
- How did electron transport chains evolve in bacteria and become part of mitochondria and chloroplasts? provenance
- Which entry fits endosymbiotic theory? action
History
History.
History
History.
- How did Keilin, Mitchell and others elucidate the chain and chemiosmosis? provenance
- Which entry fits the history of biochemistry? action
What the second pass must settle
- Should the respiratory chain and photosynthetic chain be separate primary entries?
- How should biochemistry references be linked?
- The registry entry has merged aliases naming distinct chains; should they be split off?