cyanelle thylakoid lumen

GO:0033114 · Membrane organelle · Subcellular region · Proposed

The cyanelle compartment bounded by the thylakoid membranes. [GO:0033114]

Part of: cyanelle thylakoid (GO:0009843)

Xrefs: uniprot.location:SL-0084 — Cyanelle thylakoid lumen

Taxonomic distribution

NCBITaxon:38254 Glaucocystophyceae — COMMON: The cyanelle thylakoid lumen is the compartment bounded by thylakoid membranes in glaucophyte cyanelles. [uniprot.location:SL-0084 — Cyanelle thylakoid lumen]
NCBITaxon:2762 Cyanophora paradoxa — COMMON: Cyanophora paradoxa cyanelles contain thylakoid compartments bounded by internal thylakoid membranes. [DOI:10.1104/pp.71.2.409]

NCBITaxon:2762 Cyanophora paradoxa — Model glaucophyte used for ultrastructural studies of cyanelle thylakoid and envelope membranes. [DOI:10.1104/pp.71.2.409]

The cyanelle thylakoid lumen is the internal cyanelle thylakoid compartment enclosed by thylakoid membrane.

Subject	Predicate	Object	Evidence
cyanelle thylakoid lumen	is part of	cyanelle thylakoid	`GO:0033114` GO:0033114 is the cyanelle thylakoid lumen cellular-component term. `GO:0009843` GO:0009843 identifies the containing cyanelle thylakoid compartment. `uniprot.location:SL-0084` — Cyanelle thylakoid lumen UniProt SL-0084 places the lumen under the cyanelle thylakoid location hierarchy.
cyanelle thylakoid membrane	encloses	cyanelle thylakoid lumen	`GO:0033114` GO:0033114 defines the lumen as the cyanelle compartment bounded by thylakoid membranes. `uniprot.location:SL-0084` — Cyanelle thylakoid lumen UniProt SL-0084 describes the lumen as the compartment bounded by the thylakoid membranes. `GO:0033115` GO:0033115 defines the cyanelle thylakoid membrane that bounds the lumen. `uniprot.location:SL-0085` — Cyanelle thylakoid membrane UniProt SL-0085 maps the bounding cyanelle thylakoid membrane to GO:0033115.

INTERPRETATION (RESOLVED): Keep the cyanelle thylakoid membrane as the boundary of the cyanelle thylakoid lumen rather than as a lumen component. GO:0033114 denotes the lumenal compartment bounded by thylakoid membranes, whereas GO:0033115 denotes the cyanelle thylakoid lipid bilayer membrane that bounds that compartment.

GO:0033114 Gene Ontology cellular-component term for cyanelle thylakoid lumen.
GO:0031978 Gene Ontology cellular-component term for plastid thylakoid lumen, the broader plastid-specific thylakoid lumen parent.
GO:0009843 Gene Ontology cellular-component term for the cyanelle thylakoid that contains this lumen.
GO:0033115 Gene Ontology cellular-component term for the cyanelle thylakoid membrane that bounds this lumen.
uniprot.location:SL-0084 — Cyanelle thylakoid lumen UniProt Subcellular Location entry SL-0084 maps directly to GO:0033114, places it under plastid thylakoid lumen and cyanelle thylakoid, and describes the compartment as bounded by thylakoid membranes.
uniprot.location:SL-0085 — Cyanelle thylakoid membrane UniProt Subcellular Location entry SL-0085 maps the bounding cyanelle thylakoid membrane to GO:0033115.
DOI:10.1104/pp.71.2.409 Giddings, Wasmann and Staehelin 1983, Structure of the Thylakoids and Envelope Membranes of the Cyanelles of Cyanophora paradoxa, Plant Physiology.

2026-09-12T22:25:23Z codex · CREATED_RECORD — Scaffolded by scripts/new_record.py
2026-09-12T22:25:53Z codex · EXPANDED_RECORD — Added plastid thylakoid-lumen parentage, cyanelle thylakoid parthood, the UniProt SL-0084 xref, glaucophyte distribution, a nonmechanistic lumen topology graph, and a resolved interpretation that keeps the bounding thylakoid membrane out of lumen components.
2026-09-12T22:31:37Z codex · ADDRESS_REVIEW — Resolved #714 by citing GO:0009843 on the parthood edge that points from the cyanelle thylakoid lumen to the cyanelle thylakoid.
2026-09-21T10:04:10Z codex · REPLACED_UNREADABLE_EVIDENCE — Replaced unreadable Jackson et al. 2015 Glaucophyta evidence with reachable cyanelle evidence for #1231.