1XK5

Crystal structure of the m3G-cap-binding domain of snurportin1 in complex with a m3GpppG-cap dinucleotide

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)
A	d1xk5a_	Alpha and beta proteins (a+b)	ATP-grasp	DNA ligase/mRNA capping enzyme, catalytic domain	m3G-cap binding domain of snurportin-1	m3G-cap binding domain of snurportin-1	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF21974	e1xk5A1	A: a+b complex topology	X: Protein kinase/SAICAR synthase/ATP-grasp (From Homology)	H: Protein kinase/SAICAR synthase/ATP-grasp	T: ATP-grasp	F: PF21974	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.470.30	Alpha Beta	2-Layer Sandwich	D-amino Acid Aminotransferase	Chain A, domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF21974	Snurportin1, m3G cap-binding domain (SPN1_m3Gcap_bd)	Snurportin1, m3G cap-binding domain	This entry represents the m3G cap-binding domain of Snurportin1 (SPN1), a nuclear import adaptor for m3G-capped spliceosomal U small nucleoproteins (snRNPs). After capping and assembly, the U snRNPs are transported into the nucleus by SPN1 and import ...	This entry represents the m3G cap-binding domain of Snurportin1 (SPN1), a nuclear import adaptor for m3G-capped spliceosomal U small nucleoproteins (snRNPs). After capping and assembly, the U snRNPs are transported into the nucleus by SPN1 and importin beta; SPN1 is then returned to the cytoplasm by exportin 1 (CRM1) [1-5].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	snurportin-1	nuclear import signal receptor activity nucleocytoplasmic carrier activity molecular carrier activity RNA binding binding organic cyclic compound binding nucleic acid binding RNA cap binding	cellular localization RNA import into nucleus RNA transport nitrogen compound transport nucleocytoplasmic transport transport nuclear transport nucleic acid transport intracellular transport establishment of localization localization import into nucleus establishment of RNA localization establishment of localization in cell macromolecule localization cellular localization RNA import into nucleus RNA transport nitrogen compound transport nucleocytoplasmic transport transport nuclear transport nucleic acid transport intracellular transport establishment of localization localization import into nucleus establishment of RNA localization establishment of localization in cell macromolecule localization cellular process RNA localization nucleobase-containing compound transport snRNA import into nucleus snRNA transport protein localization establishment of protein localization protein localization to nucleus establishment of protein localization to organelle protein transport cellular macromolecule localization protein localization to organelle protein import into nucleus intracellular protein transport	protein-containing complex nucleocytoplasmic transport complex NLS-dependent protein nuclear import complex intracellular anatomical structure cytoplasm cellular anatomical entity cytosol cell periphery plasma membrane membrane membrane-bounded organelle nucleus nuclear protein-containing complex intracellular membrane-bounded organelle protein-containing complex nucleocytoplasmic transport complex NLS-dependent protein nuclear import complex intracellular anatomical structure cytoplasm cellular anatomical entity cytosol cell periphery plasma membrane membrane membrane-bounded organelle nucleus nuclear protein-containing complex intracellular membrane-bounded organelle endomembrane system intracellular organelle organelle envelope organelle nuclear envelope nuclear pore membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR002652	Importin-alpha, importin-beta-binding domain	Domain
A	IPR017336	Snurportin-1	Family
A	IPR047857	Snurportin-1, m3G cap-binding domain	Domain
A	IPR024721	Snurportin-1, N-terminal	Domain

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.