Annotations: 4Q25

Crystal structure of PhoU from Pseudomonas aeruginosa

External Resource: Annotation

Domain Annotation: SCOP/SCOPe 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)
B	d4q25b_	All alpha proteins	Spectrin repeat-like	PhoU-like	automated matches	automated matches	(Pseudomonas aeruginosa PAO1 ) [TaxId: 208964 ],	SCOPe (2.08)
A	d4q25a_	All alpha proteins	Spectrin repeat-like	PhoU-like	automated matches	automated matches	(Pseudomonas aeruginosa PAO1 ) [TaxId: 208964 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Thymidylat_synt	e4q25B1	A: beta barrels	X: Four-helical up-and-down bundle	H: Thymidylate synthase/dCMP hydroxymethylase	T: Thymidylate synthase/dCMP hydroxymethylase	F: Thymidylat_synt	ECOD (v294.2)
A	Polyoma_coat	e4q25A1	A: beta barrels	X: Four-helical up-and-down bundle	H: Thymidylate synthase/dCMP hydroxymethylase	T: Thymidylate synthase/dCMP hydroxymethylase	F: Polyoma_coat	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	1.20.58.220	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
A	1.20.58.220	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01895	PhoU domain (PhoU)	PhoU domain	This family contains phosphate regulatory proteins including PhoU. PhoU proteins are known to play a role in the regulation of phosphate uptake. The PhoU domain is composed of a three helix bundle [1]. The PhoU protein contains two copies of this dom ...	This family contains phosphate regulatory proteins including PhoU. PhoU proteins are known to play a role in the regulation of phosphate uptake. The PhoU domain is composed of a three helix bundle [1]. The PhoU protein contains two copies of this domain. The domain binds to an iron cluster via its conserved E/DXXXD motif.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Phosphate-specific transport system accessory protein PhoU homolog	identical protein binding protein binding binding protein homodimerization activity protein dimerization activity	phosphate ion homeostasis intracellular phosphate ion homeostasis cellular homeostasis inorganic ion homeostasis chemical homeostasis homeostatic process intracellular chemical homeostasis negative regulation of positive chemotaxis positive chemotaxis chemotaxis negative regulation of locomotion regulation of biological process response to stimulus regulation of response to external stimulus phosphate ion homeostasis intracellular phosphate ion homeostasis cellular homeostasis inorganic ion homeostasis chemical homeostasis homeostatic process intracellular chemical homeostasis negative regulation of positive chemotaxis positive chemotaxis chemotaxis negative regulation of locomotion regulation of biological process response to stimulus regulation of response to external stimulus negative regulation of response to stimulus biological regulation negative regulation of biological process response to external stimulus negative regulation of chemotaxis regulation of chemotaxis regulation of positive chemotaxis taxis regulation of response to stimulus response to chemical regulation of locomotion negative regulation of response to external stimulus locomotion localization transport phosphate ion transport establishment of localization inorganic anion transport cell chemotaxis cellular response to stimulus cellular response to chemical stimulus cell migration cellular process cell motility regulation of cellular process negative regulation of metabolic process negative regulation of phosphate metabolic process negative regulation of phosphorus metabolic process negative regulation of cellular process phosphate-containing compound metabolic process metabolic process regulation of phosphorus metabolic process phosphorus metabolic process regulation of metabolic process regulation of phosphate transmembrane transport regulation of localization regulation of transport phosphate ion transmembrane transport negative regulation of phosphate transmembrane transport negative regulation of transport regulation of phosphate transport negative regulation of transmembrane transport transmembrane transport regulation of transmembrane transport	cellular anatomical structure intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR038078	PhoU-like domain superfamily	Homologous Superfamily
A, B	IPR026022	PhoU domain	Domain
A, B	IPR028366	PhoU	Family

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.