Annotations: 3CQR

Crystal Structure of the Lipocalin domain of Violaxanthin de-epoxidase (VDE) at pH5

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	Lipocalins	8052645	3001332	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Lipocalins	8052645	3001332	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	RdRP_3	e3cqrB1	A: a/b three-layered sandwiches	X: HTH	H: Nudix	T: Nudix	F: RdRP_3	ECOD (v294.1)
A	RdRP_3	e3cqrA1	A: a/b three-layered sandwiches	X: HTH	H: Nudix	T: Nudix	F: RdRP_3	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)
A	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Violaxanthin de-epoxidase, chloroplast	protein binding binding protein domain specific binding oxidoreductase activity, reducing C-O-C group as acceptor oxidoreductase activity catalytic activity violaxanthin de-epoxidase activity	fatty acid metabolic process oxoacid metabolic process carboxylic acid metabolic process primary metabolic process metabolic process cellular process small molecule metabolic process monocarboxylic acid metabolic process organic acid metabolic process lipid metabolic process tetrapyrrole metabolic process chlorophyll metabolic process porphyrin-containing compound metabolic process xanthophyll metabolic process fatty acid metabolic process oxoacid metabolic process carboxylic acid metabolic process primary metabolic process metabolic process cellular process small molecule metabolic process monocarboxylic acid metabolic process organic acid metabolic process lipid metabolic process tetrapyrrole metabolic process chlorophyll metabolic process porphyrin-containing compound metabolic process xanthophyll metabolic process carotenoid metabolic process terpenoid metabolic process isoprenoid metabolic process xanthophyll cycle response to stimulus response to stress response to heat response to abiotic stimulus response to temperature stimulus	membrane-bounded organelle intracellular anatomical structure plastid intracellular membraneless organelle intracellular membrane-bounded organelle plastid thylakoid plastid thylakoid lumen intracellular organelle chloroplast thylakoid lumen cellular anatomical structure organelle chloroplast thylakoid membraneless organelle cytoplasm membrane-bounded organelle intracellular anatomical structure plastid intracellular membraneless organelle intracellular membrane-bounded organelle plastid thylakoid plastid thylakoid lumen intracellular organelle chloroplast thylakoid lumen cellular anatomical structure organelle chloroplast thylakoid membraneless organelle cytoplasm thylakoid lumen thylakoid chloroplast extracellular region chloroplast thylakoid membrane plastid membrane protein-containing complex photosystem photosystem II membrane protein complex organelle outer membrane plastid thylakoid membrane organelle envelope bounding membrane of organelle plastid envelope chloroplast photosystem II membrane thylakoid membrane chloroplast thylakoid membrane protein complex outer membrane photosynthetic membrane organelle membrane cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR010788	VDE lipocalin domain	Domain
A, B	IPR044682	Violaxanthin de-epoxidase	Family
A, B	IPR012674	Calycin	Homologous Superfamily
A, B	IPR022272	Lipocalin family conserved site	Conserved Site

RCSB PDB is hosted by

RCSB PDB is a member of

RCSB Partners
Nucleic Acid Knowledgebase

CoreTrustSeal

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.