Annotations: 7WN1

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth C]	Peptidase_C14	e7wn1C1	A: a/b three-layered sandwiches	X: RNase A-like	H: Cytochrome P450	T: Cytochrome P450	F: Peptidase_C14	ECOD (v294.1)
A	Peptidase_C14	e7wn1A1	A: a/b three-layered sandwiches	X: RNase A-like	H: Cytochrome P450	T: Cytochrome P450	F: Peptidase_C14	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth C]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth C]	Heavy Chain	IGHV1	-	equilibrative nucleoside/nucleobase transporter	SAbDab (2026-04-10)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth C]	nanobody48	-	-	-
A	Equilibrative nucleoside/nucleobase transporter	carbohydrate derivative transmembrane transporter activity nucleoside transmembrane transporter activity nucleobase-containing compound transmembrane transporter activity transporter activity transmembrane transporter activity	localization adenosine transport nitrogen compound transport transport nucleoside transport carbohydrate derivative transport establishment of localization nucleobase-containing compound transport purine nucleobase transport nucleobase transport	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR002259	Equilibrative nucleoside transporter	Family
A	IPR036259	MFS transporter superfamily	Homologous Superfamily

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Solute Carrier (SLC) Transporter Superfamily	Equilibrative nucleoside transporter 1 (ENT1) SLC29 family, Y190A mutant, in complex with nanobody 19

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.