Annotations: 3IBW

Crystal Structure of the ACT domain from GTP pyrophosphokinase of Chlorobium tepidum. Northeast Structural Genomics Consortium Target CtR148A

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)
B	Ribosomal_L31	e3ibwB1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: Ribosomal_L31	ECOD (v295)
A	YgbB	e3ibwA1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: YgbB	ECOD (v295)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.30.70.260	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	ACT domain	CATH (4.3.0)
A	3.30.70.260	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	ACT domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF13291	ACT domain (ACT_4)	ACT domain	ACT domains bind to amino acids and regulate associated enzyme domains. These ACT domains are found at the C-terminus of the RelA protein.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	GTP pyrophosphokinase	GTP diphosphokinase activity diphosphotransferase activity transferase activity catalytic activity transferase activity, transferring phosphorus-containing groups RNA binding binding nucleic acid binding	nucleoside phosphate metabolic process ribose phosphate metabolic process nucleoside bisphosphate metabolic process purine nucleoside bisphosphate metabolic process ribonucleoside bisphosphate metabolic process carbohydrate derivative metabolic process primary metabolic process nucleotide metabolic process purine ribonucleoside bisphosphate metabolic process purine-containing compound metabolic process nucleobase-containing compound metabolic process guanosine tetraphosphate metabolic process purine nucleotide metabolic process ribonucleotide metabolic process organophosphate metabolic process nucleoside phosphate metabolic process ribose phosphate metabolic process nucleoside bisphosphate metabolic process purine nucleoside bisphosphate metabolic process ribonucleoside bisphosphate metabolic process carbohydrate derivative metabolic process primary metabolic process nucleotide metabolic process purine ribonucleoside bisphosphate metabolic process purine-containing compound metabolic process nucleobase-containing compound metabolic process guanosine tetraphosphate metabolic process purine nucleotide metabolic process ribonucleotide metabolic process organophosphate metabolic process nucleobase-containing small molecule metabolic process metabolic process cellular process small molecule metabolic process purine ribonucleotide metabolic process phosphorus metabolic process nucleobase-containing small molecule interconversion	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR003607	HD/PDEase domain	Domain
A, B	IPR012676	TGS-like	Homologous Superfamily
A, B	IPR004095	TGS	Domain
A, B	IPR045865	ACT-like domain	Homologous Superfamily
A, B	IPR002912	ACT domain	Domain
A, B	IPR045600	RelA/SpoT, AH and RIS domain	Domain
A, B	IPR033655	RelA/SpoT, TGS domain	Domain
A, B	IPR004811	RelA/SpoT family	Family
A, B	IPR043519	Nucleotidyltransferase superfamily	Homologous Superfamily
A, B	IPR007685	RelA/SpoT	Domain
A, B	IPR012675	Beta-grasp domain superfamily	Homologous Superfamily
A, B	IPR060374	RelA/SpoT, RIS domain	Domain

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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.