cyanelle thylakoid membrane

GO:0033115 · Membrane organelle · Membrane · Proposed

The lipid bilayer membrane of any thylakoid within a cyanelle, a photosynthetic organelle of glaucocystophyte algae. [GO:0033115]

Part of: cyanelle thylakoid (GO:0009843)

Xrefs: uniprot.location:SL-0085 — Cyanelle thylakoid membrane

Components

Component	Type	Part of / acts on	Grounding	Genes	Stoichiometry	Essential	Role
cyanelle thylakoid lipid bilayer	Lipid	part of	Reviewed label only (reviewed name; no accession asserted)			ESSENTIAL	Internal cyanelle thylakoid lipid bilayer that bounds the thylakoid lumen. `GO:0033115` GO:0033115 defines the cyanelle thylakoid membrane as the lipid bilayer membrane of any thylakoid within a cyanelle. `uniprot.location:SL-0085` — Cyanelle thylakoid membrane UniProt SL-0085 maps directly to GO:0033115 and describes the same cyanelle thylakoid lipid bilayer. `GO:0033114` GO:0033114 defines the cyanelle thylakoid lumen as the compartment bounded by thylakoid membranes. `uniprot.location:SL-0084` — Cyanelle thylakoid lumen UniProt SL-0084 describes the cyanelle thylakoid lumen as bounded by thylakoid membranes.

NCBITaxon:38254 Glaucocystophyceae — COMMON: UniProt SL-0085 constrains cyanelle thylakoid membranes to glaucocystophyte algae. [uniprot.location:SL-0085 — Cyanelle thylakoid membrane]
NCBITaxon:2762 Cyanophora paradoxa — COMMON: Cyanophora paradoxa cyanelles contain internal thylakoid membranes characterized by electron microscopy. [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]

photosynthesis, light reaction GO:0019684 — The cyanelle thylakoid membrane is the internal membrane surface of the cyanelle thylakoid system that supports photosynthetic light reactions.
- GO:0009843 GO:0009843 defines the cyanelle thylakoid as a photosynthetic membrane system resembling that of cyanobacteria.
- uniprot.location:SL-0277 — Cyanelle thylakoid UniProt SL-0277 describes cyanelle thylakoids as internal interconnected photosynthetic membranes.

The cyanelle thylakoid membrane bounds the thylakoid lumen and supports photosynthetic light reactions.

Subject	Predicate	Object	Evidence
cyanelle thylakoid membrane	bounds	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 bounding cyanelle thylakoid membrane. `uniprot.location:SL-0085` — Cyanelle thylakoid membrane UniProt SL-0085 maps directly to the bounding cyanelle thylakoid membrane.
cyanelle thylakoid membrane	supports	photosynthesis, light reaction	`GO:0009843` GO:0009843 defines the cyanelle thylakoid as a photosynthetic membrane resembling that of cyanobacteria. `uniprot.location:SL-0277` — Cyanelle thylakoid UniProt SL-0277 describes the cyanelle thylakoid as an internal system of interconnected photosynthetic membranes.

CURATION_TODO (OPEN): Resolve an exact source-neutral grounding for the lipid constituent of the cyanelle thylakoid membrane. The record is exactly grounded to GO:0033115 and UniProt SL-0085, but the lipid bilayer constituent is intentionally left as a reviewed-label-only component until an exact source-neutral lipid or membrane-constituent CURIE is curated.

GO:0033115 Gene Ontology cellular-component term for cyanelle thylakoid membrane.
GO:0042651 Gene Ontology cellular-component term for thylakoid membrane, the broader thylakoid-membrane parent.
GO:0055035 Gene Ontology cellular-component term for plastid thylakoid membrane, the plastid-specific thylakoid membrane parent.
GO:0009843 Gene Ontology cellular-component term for the cyanelle thylakoid that this membrane is part of.
GO:0033114 Gene Ontology cellular-component term for the cyanelle thylakoid lumen bounded by this membrane.
uniprot.location:SL-0085 — Cyanelle thylakoid membrane UniProt Subcellular Location entry SL-0085 maps directly to GO:0033115, places it under plastid thylakoid membrane and cyanelle thylakoid, and describes it as the lipid bilayer membrane of thylakoids within glaucocystophyte cyanelles.
uniprot.location:SL-0084 — Cyanelle thylakoid lumen UniProt Subcellular Location entry SL-0084 maps the bounded cyanelle thylakoid lumen to GO:0033114.
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.

2026-09-12T22:42:13Z codex · CREATED_RECORD — Scaffolded by scripts/new_record.py
2026-09-12T22:42:43Z codex · EXPANDED_RECORD — Added thylakoid-membrane and plastid thylakoid-membrane parentage, cyanelle thylakoid parthood, the UniProt SL-0085 xref, a reviewed-label-only lipid-bilayer component, glaucophyte distribution, a light-reaction function, a nonmechanistic topology graph, and a lipid-grounding TODO.
2026-09-12T22:48:35Z codex · ADDRESS_REVIEW — Resolved #716 by citing GO:0033114 and UniProt SL-0084 on the lipid-bilayer component whose role states that it bounds the cyanelle thylakoid lumen.
2026-09-21T10:04:10Z codex · REPLACED_UNREADABLE_EVIDENCE — Replaced unreadable Jackson et al. 2015 Glaucophyta evidence with reachable cyanelle evidence for #1231.