Annotations: 2W4S

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF10258	e2w4sA1	A: alpha arrays	X: PHAX RNA-binding domain (From Topology)	H: PHAX RNA-binding domain (From Topology)	T: PHAX RNA-binding domain	F: PF10258	ECOD (1.6)
B	PF10258	e2w4sB1	A: alpha arrays	X: PHAX RNA-binding domain (From Topology)	H: PHAX RNA-binding domain (From Topology)	T: PHAX RNA-binding domain	F: PF10258	ECOD (1.6)
C	PF10258	e2w4sC1	A: alpha arrays	X: PHAX RNA-binding domain (From Topology)	H: PHAX RNA-binding domain (From Topology)	T: PHAX RNA-binding domain	F: PF10258	ECOD (1.6)
D	PF10258	e2w4sD1	A: alpha arrays	X: PHAX RNA-binding domain (From Topology)	H: PHAX RNA-binding domain (From Topology)	T: PHAX RNA-binding domain	F: PF10258	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.10.1440	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	PHAX RNA-binding domain	CATH (4.3.0)
B	1.10.10.1440	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	PHAX RNA-binding domain	CATH (4.3.0)
C	1.10.10.1440	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	PHAX RNA-binding domain	CATH (4.3.0)
D	1.10.10.1440	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	PHAX RNA-binding domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF10258	Phosphorylated adapter RNA export protein, RNA-binding domain (PHAX_RNA-bd)	Phosphorylated adapter RNA export protein, RNA-binding domain	The phosphorylated adaptor for RNA export (PHAX) protein transports U3 snoRNA from the nucleus after transcription [1, 2]. This entry represents the highly conserved U3 snoRNA-binding domain of PHAX, which is characterised by having two pairs of adja ...	The phosphorylated adaptor for RNA export (PHAX) protein transports U3 snoRNA from the nucleus after transcription [1, 2]. This entry represents the highly conserved U3 snoRNA-binding domain of PHAX, which is characterised by having two pairs of adjacent glycines with the sequence motif GGx12GG. This domain adopts a novel helical fold and binds non-specific single-stranded RNA and comprises five alpha-helices linked by short loops containing 1 to 4 residues, apart from helices alpha3 and 4 that are linked by 13 residues. The fold is unique to this kind of RNA binding domains which show no structural homology with other RNA-binding domains [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	Ankyrin-repeat protein	-	protein localization localization cellular localization protein localization to ciliary inversin compartment protein localization to cilium protein localization to organelle cellular macromolecule localization macromolecule localization cellular process	membrane-bounded organelle cell projection ciliary inversin compartment organelle cilium cellular anatomical entity plasma membrane bounded cell projection

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR002110	Ankyrin repeat	Repeat
A, B, C, D	IPR038092	Phosphorylated adapter RNA export protein, RNA-binding domain superfamily	Homologous Superfamily
A, B, C, D	IPR019385	Phosphorylated adapter RNA export protein, RNA-binding domain	Domain
A, B, C, D	IPR036770	Ankyrin repeat-containing domain superfamily	Homologous Superfamily

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.