1Q6A

Solution Structure of the C-terminal Domain of Thermosynechococcus elongatus KaiA (ThKaiA180C); Averaged Minimized Structure

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 Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1q6aa1	All alpha proteins	KaiA/RbsU domain	KaiA/RbsU domain	Circadian clock protein KaiA, C-terminal domain	Circadian clock protein KaiA, C-terminal domain	(Thermosynechococcus vestitus BP-1 ) [TaxId: 197221 ],	SCOPe (2.08)
A	d1q6aa2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Thermosynechococcus vestitus BP-1 ) [TaxId: 197221 ],	SCOPe (2.08)
B	d1q6ab1	All alpha proteins	KaiA/RbsU domain	KaiA/RbsU domain	Circadian clock protein KaiA, C-terminal domain	Circadian clock protein KaiA, C-terminal domain	(Thermosynechococcus vestitus BP-1 ) [TaxId: 197221 ],	SCOPe (2.08)
B	d1q6ab2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Thermosynechococcus vestitus BP-1 ) [TaxId: 197221 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	KaiA/RbsU domain	8041136	3000938	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	KaiA/RbsU domain	8041136	3000938	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	KaiA	e1q6aA1	A: alpha arrays	X: KaiA/RbsU domain-like	H: KaiA/RbsU domain (From Topology)	T: KaiA/RbsU domain	F: KaiA	ECOD (1.6)
B	KaiA	e1q6aB1	A: alpha arrays	X: KaiA/RbsU domain-like	H: KaiA/RbsU domain (From Topology)	T: KaiA/RbsU domain	F: KaiA	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.1240.30	Mainly Alpha	Orthogonal Bundle	Methyltransferase, Methionine Synthase (B12-binding Domains)	Chain A, domain 1	CATH (4.3.0)
B	1.10.1240.30	Mainly Alpha	Orthogonal Bundle	Methyltransferase, Methionine Synthase (B12-binding Domains)	Chain A, domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF07688	KaiA C-terminal domain (KaiA)	KaiA C-terminal domain	The cyanobacterial clock proteins KaiA and KaiB are proposed as regulators of the circadian rhythm in cyanobacteria. The overall fold of the KaiA C-terminal domain is that of a four-helix bundle, which forms a dimer in the known structure [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Circadian clock protein KaiA homolog	identical protein binding protein binding binding	rhythmic process circadian rhythm	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR011006	CheY-like superfamily	Homologous Superfamily
A, B	IPR011648	Circadian clock oscillator protein KaiA	Family
A, B	IPR020844	Circadian clock protein KaiA, N-terminal	Domain
A, B	IPR017944	KaiA/RbsU helical domain superfamily	Homologous Superfamily
A, B	IPR020856	Circadian clock oscillator protein KaiA, C-terminal	Domain

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.