4XKC

Crystal Structure of GENOMES UNCOUPLED 4 (GUN4) in Complex with Magnesium Deuteroporphyrin IX

External Resource: Annotation

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

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d4xkca1	All alpha proteins	alpha-alpha superhelix	ARM repeat	GUN4-associated domain	Mg-chelatase cofactor Gun4	(Synechocystis sp. PCC 6803 substr. Kazusa ) [TaxId: 1111708 ],	SCOPe (2.08)
A	d4xkca2	All alpha proteins	GUN4-like	GUN4-like	GUN4-like	Mg-chelatase cofactor Gun4	(Synechocystis sp. PCC 6803 substr. Kazusa ) [TaxId: 1111708 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	GUN4-like	8034128	3001841	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	ARM repeat-like	8034126	3000116	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)
A	PF05419	e4xkcA2	A: alpha arrays	X: GUN4-like (From Topology)	H: GUN4-like (From Topology)	T: GUN4-like	F: PF05419	ECOD (1.6)
A	PF16416	e4xkcA1	A: alpha superhelices	X: Repetitive alpha hairpins	H: ARM repeat (From Topology)	T: ARM repeat	F: PF16416	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.25.40.620	Mainly Alpha	Alpha Horseshoe	Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat		CATH (4.3.0)
A	1.10.10.1770	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Gun4-like	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF05419	GUN4-like (GUN4)	GUN4-like	In Arabidopsis, GUN4 is required for the functioning of the plastid mediated repression of nuclear transcription that is involved in controlling the levels of magnesium- protoporphyrin IX. GUN4 binds the product and substrate of Mg-chelatase, an enz ...	In Arabidopsis, GUN4 is required for the functioning of the plastid mediated repression of nuclear transcription that is involved in controlling the levels of magnesium- protoporphyrin IX. GUN4 binds the product and substrate of Mg-chelatase, an enzyme that produces Mg-Proto, and activates Mg-chelatase. GUN4 is thought to participates in plastid-to-nucleus signaling by regulating magnesium-protoporphyrin IX synthesis or trafficking.	Domain
A	PF16416	ARM-like repeat domain, GUN4-N terminal (GUN4_N)	ARM-like repeat domain, GUN4-N terminal	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Ycf53-like protein	binding organic cyclic compound binding tetrapyrrole binding	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR032192	GUN4, N-terminal ARM-like repeat domain	Domain
A	IPR037215	GUN4-like superfamily	Homologous Superfamily
A	IPR016024	Armadillo-type fold	Homologous Superfamily
A	IPR008629	GUN4-like	Domain

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 R01GM133198.