Annotations: 3W3X

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	IBN_N	e3w3xA1	A: alpha superhelices	X: Repetitive alpha hairpins	H: ARM repeat (From Topology)	T: ARM repeat	F: IBN_N	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	6.10.140.1700	Special	Helix non-globular	Helix Hairpins		CATH (4.3.0)
A	1.25.10.10	Mainly Alpha	Alpha Horseshoe	Leucine-rich Repeat Variant	Leucine-rich Repeat Variant	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF18808	Importin repeat (Importin_rep_4)	Importin repeat	-	Repeat
A	PF18816	Importin repeat (Importin_rep_5)	Importin repeat	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Importin subunit beta-3	nuclear import signal receptor activity nucleocytoplasmic carrier activity molecular carrier activity nuclear localization sequence binding signal sequence binding binding peptide binding	regulation of protein modification process peptidyl-lysine modification protein desumoylation regulation of primary metabolic process regulation of nitrogen compound metabolic process organic substance metabolic process protein modification by small protein removal peptidyl-amino acid modification nitrogen compound metabolic process protein metabolic process regulation of protein modification by small protein conjugation or removal protein modification process regulation of biological process organonitrogen compound metabolic process regulation of protein modification process peptidyl-lysine modification protein desumoylation regulation of primary metabolic process regulation of nitrogen compound metabolic process organic substance metabolic process protein modification by small protein removal peptidyl-amino acid modification nitrogen compound metabolic process protein metabolic process regulation of protein modification by small protein conjugation or removal protein modification process regulation of biological process organonitrogen compound metabolic process regulation of post-translational protein modification regulation of protein metabolic process biological regulation primary metabolic process regulation of macromolecule metabolic process macromolecule modification metabolic process macromolecule metabolic process post-translational protein modification regulation of metabolic process protein modification by small protein conjugation or removal regulation of protein desumoylation mitotic nuclear division regulation of cellular component organization regulation of cellular process regulation of cell cycle process organelle fission regulation of mitotic nuclear division regulation of organelle organization mitotic cell cycle cellular component organization regulation of mitotic cell cycle organelle organization nuclear division mitotic cell cycle process regulation of nuclear division cellular process cellular component organization or biogenesis cell cycle regulation of cell cycle cell cycle process cellular localization nitrogen compound transport nucleocytoplasmic transport transport cellular biosynthetic process nuclear transport mRNA transport localization mRNA export from nucleus establishment of localization in cell organic substance biosynthetic process RNA localization nuclear export nucleobase-containing compound transport RNA transport organic substance transport cellular metabolic process nucleic acid transport intracellular transport gene expression establishment of localization macromolecule biosynthetic process RNA export from nucleus establishment of RNA localization biosynthetic process macromolecule localization protein localization establishment of protein localization protein localization to nucleus import into nucleus establishment of protein localization to organelle protein transport cellular macromolecule localization protein localization to organelle protein import into nucleus intracellular protein transport	intracellular anatomical structure cytoplasm cellular anatomical entity membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle
B	Phosphate system positive regulatory protein PHO4	transcription regulator activity DNA-binding transcription factor activity protein binding binding protein dimerization activity sequence-specific DNA binding DNA binding organic cyclic compound binding nucleic acid binding	regulation of biological process regulation of cellular process positive regulation of phosphorus metabolic process cellular metabolic process biological regulation positive regulation of biological process regulation of cellular metabolic process positive regulation of cellular metabolic process positive regulation of phosphate metabolic process positive regulation of metabolic process regulation of phosphate metabolic process phosphate-containing compound metabolic process regulation of phosphorus metabolic process metabolic process regulation of biological process regulation of cellular process positive regulation of phosphorus metabolic process cellular metabolic process biological regulation positive regulation of biological process regulation of cellular metabolic process positive regulation of cellular metabolic process positive regulation of phosphate metabolic process positive regulation of metabolic process regulation of phosphate metabolic process phosphate-containing compound metabolic process regulation of phosphorus metabolic process metabolic process cellular process phosphorus metabolic process regulation of metabolic process positive regulation of cellular process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process regulation of nitrogen compound metabolic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process transcription by RNA polymerase II heterocycle metabolic process organic substance biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of transcription by RNA polymerase II positive regulation of nucleobase-containing compound metabolic process cellular nitrogen compound metabolic process primary metabolic process positive regulation of transcription by RNA polymerase II positive regulation of RNA metabolic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process aromatic compound biosynthetic process organic cyclic compound biosynthetic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription positive regulation of DNA-templated transcription cellular biosynthetic process RNA metabolic process RNA biosynthetic process nucleic acid biosynthetic process organic substance metabolic process positive regulation of biosynthetic process nitrogen compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process heterocycle biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process positive regulation of nitrogen compound metabolic process positive regulation of RNA biosynthetic process cellular aromatic compound metabolic process positive regulation of cellular biosynthetic process response to extracellular stimulus cellular response to stimulus response to nutrient levels response to stimulus response to external stimulus cellular response to starvation cell communication cellular response to nutrient levels cellular response to phosphate starvation cellular response to stress response to stress cellular response to extracellular stimulus response to starvation cellular response to external stimulus protein-DNA complex organization cellular component organization protein-containing complex organization chromatin organization chromatin remodeling cellular component organization or biogenesis	intracellular anatomical structure cytoplasm cellular anatomical entity membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR040122	Importin beta family	Family
A	IPR016024	Armadillo-type fold	Homologous Superfamily
A	IPR041389	Importin repeat 6	Repeat
A	IPR011989	Armadillo-like helical	Homologous Superfamily
A	IPR041653	Importin repeat 4	Repeat
A	IPR040928	Importin repeat	Repeat
B	IPR011598	Myc-type, basic helix-loop-helix (bHLH) domain	Domain
B	IPR036638	Helix-loop-helix DNA-binding domain superfamily	Homologous Superfamily

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.