3LS1

Crystal Structure of Cyanobacterial PsbQ from Synechocystis sp. PCC 6803 complexed with Zn2+

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF05757	e3ls1A1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Oxygen-evolving enhancer protein 3 (From Topology)	T: Oxygen-evolving enhancer protein 3	F: PF05757	ECOD (1.6)
B	PF05757	e3ls1B1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Oxygen-evolving enhancer protein 3 (From Topology)	T: Oxygen-evolving enhancer protein 3	F: PF05757	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.120.290	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Oxygen-evolving enhancer protein 3 (PsbQ), four-helix up-down bundle	CATH (4.3.0)
B	1.20.120.290	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Oxygen-evolving enhancer protein 3 (PsbQ), four-helix up-down bundle	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF05757	Oxygen evolving enhancer protein 3 (PsbQ) (PsbQ)	Oxygen evolving enhancer protein 3 (PsbQ)	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Sll1638 protein	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding	photosynthesis cellular metabolic process metabolic process cellular process	protein-containing complex intracellular anatomical structure photosystem plasma membrane protein complex photosystem II membrane plasma membrane membrane protein complex cellular anatomical entity intracellular organelle cell periphery organelle intracellular non-membrane-bounded organelle plasma membrane-derived thylakoid photosystem II protein-containing complex intracellular anatomical structure photosystem plasma membrane protein complex photosystem II membrane plasma membrane membrane protein complex cellular anatomical entity intracellular organelle cell periphery organelle intracellular non-membrane-bounded organelle plasma membrane-derived thylakoid photosystem II bacterial thylakoid cytoplasm photosynthetic membrane thylakoid non-membrane-bounded organelle plasma membrane-derived chromatophore membrane plasma membrane-derived chromatophore thylakoid membrane plasma membrane-derived thylakoid membrane plasma membrane region extrinsic component of membrane catalytic complex photosystem II oxygen evolving complex oxidoreductase complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR017487	Photosystem II PsbQ, cyanobacteria	Family
A, B	IPR008797	Oxygen-evolving enhancer protein 3	Family
A, B	IPR023222	PsbQ-like domain superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.