2Q5D

Crystal Structure of Human Importin Beta bound to the Snurportin1 IBB-domain second crystal form

Domain Annotation: SCOP Classification SCOP Database (version: 2.0) Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species
A	d2q5da_	All alpha proteins	alpha-alpha superhelix	ARM repeat	Armadillo repeat	Importin beta	human (Homo sapiens ) [TaxId: 9606 ]
C	d2q5db_	All alpha proteins	alpha-alpha superhelix	ARM repeat	Armadillo repeat	Importin beta	human (Homo sapiens ) [TaxId: 9606 ]
B	d2q5dc_	Small proteins	Intrinsically disordered proteins	importin-beta binding (IBB) domain of snurportin-1	importin-beta binding (IBB) domain of snurportin-1	importin-beta binding (IBB) domain of snurportin-1	human (Homo sapiens ) [TaxId: 9606 ]
D	d2q5dd_	Small proteins	Intrinsically disordered proteins	importin-beta binding (IBB) domain of snurportin-1	importin-beta binding (IBB) domain of snurportin-1	importin-beta binding (IBB) domain of snurportin-1	human (Homo sapiens ) [TaxId: 9606 ]

Domain Annotation: CATH CATH Database (version 4.2.0) Homepage

Chain	Domain	Class	Architecture	Topology	Homology
A	1.25.10.10	Mainly Alpha	Alpha Horseshoe	Leucine-rich Repeat Variant	Leucine-rich Repeat Variant
C	1.25.10.10	Mainly Alpha	Alpha Horseshoe	Leucine-rich Repeat Variant	Leucine-rich Repeat Variant

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Identifier	Description	Comments	Source
A, C	PF03810	Importin-beta N-terminal domain (IBN_N)	Importin-beta N-terminal domain	-	Family
B, D	PF11538	Snurportin1 (Snurportin1)	Snurportin1	-	Family

Gene Product Annotation Gene Product Annotation

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Importin beta-1 subunit	binding protein binding enzyme binding heat shock protein binding Hsp90 protein binding importin-alpha family protein binding nuclear import signal receptor activity molecular carrier activity nucleocytoplasmic carrier activity signal sequence binding nuclear localization sequence binding amide binding peptide binding protein domain specific binding nucleic acid binding RNA binding organic cyclic compound binding heterocyclic compound binding zinc ion binding ion binding cation binding metal ion binding transition metal ion binding	cellular process viral process modulation by virus of host process modulation by virus of host cellular process modulation of process of other organism modulation by symbiont of host process modulation by symbiont of host cellular process biological process involved in symbiotic interaction biological process involved in interspecies interaction between organisms biological process involved in interaction with host modulation of process of other organism involved in symbiotic interaction	intracellular anatomical structure cytoplasm cellular anatomical entity cytoplasmic stress granule ribonucleoprotein granule cytoplasmic ribonucleoprotein granule organelle non-membrane-bounded organelle intracellular organelle intracellular non-membrane-bounded organelle supramolecular complex cytosol endoplasmic reticulum endomembrane system organelle subcompartment membrane-bounded organelle intracellular membrane-bounded organelle endoplasmic reticulum tubular network endoplasmic reticulum subcompartment extracellular region extracellular space vesicle extracellular organelle extracellular exosome extracellular vesicle secretory granule cytoplasmic vesicle membrane-enclosed lumen organelle lumen intracellular vesicle secretory vesicle ficolin-1-rich granule ficolin-1-rich granule lumen host cellular component host cell membrane nucleus nuclear envelope organelle envelope envelope organelle membrane nuclear membrane nuclear pore protein-containing complex nuclear protein-containing complex nucleoplasm nuclear lumen intracellular organelle lumen vesicle lumen secretory granule lumen specific granule lumen specific granule cytoplasmic vesicle lumen
C, D	Snurportin-1	nuclear import signal receptor activity molecular carrier activity nucleocytoplasmic carrier activity		intracellular anatomical structure cytoplasm cytosol cellular anatomical entity nucleus nuclear envelope nuclear pore endomembrane system organelle envelope envelope protein-containing complex organelle membrane-bounded organelle intracellular organelle intracellular membrane-bounded organelle nuclear protein-containing complex

RCSB PDB is 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.