Annotations: 3NCY

X-ray crystal structure of an arginine agmatine antiporter (AdiC) in complex with a Fab fragment

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD
Membrane Protein Annotation: mpstruc

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D	SCOP2B Superfamily	SNF-like	8092927	3001654	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	SNF-like	8092927	3001654	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	SNF-like	8092927	3001654	SCOP2B (2022-06-29)
A	SCOP2 Family	Arginine/agmatine antiporter-like	8048865	4006243	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	SNF-like	8092927	3001654	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
H [auth S]	Sdh_cyt	e3ncyS1	A: alpha arrays	X: Alpha-beta plaits	H: Phage tail protein-like	T: Transmembrane protein 14A	F: Sdh_cyt	ECOD (v295.2)
G [auth W]	PsaL	e3ncyW1	A: alpha arrays	X: Retrovirus capsid protein	H: Ubiquitin-related	T: Ubiquitin-like	F: PsaL	ECOD (v295.2)
F [auth P]	Sdh_cyt	e3ncyP1	A: alpha arrays	X: Alpha-beta plaits	H: Phage tail protein-like	T: Transmembrane protein 14A	F: Sdh_cyt	ECOD (v295.2)
E [auth Q]	PsaL	e3ncyQ1	A: alpha arrays	X: Retrovirus capsid protein	H: Ubiquitin-related	T: Ubiquitin-like	F: PsaL	ECOD (v295.2)
D	Sdh_cyt	e3ncyD1	A: alpha arrays	X: Alpha-beta plaits	H: Phage tail protein-like	T: Transmembrane protein 14A	F: Sdh_cyt	ECOD (v295.2)
C	Sdh_cyt	e3ncyC1	A: alpha arrays	X: Alpha-beta plaits	H: Phage tail protein-like	T: Transmembrane protein 14A	F: Sdh_cyt	ECOD (v295.2)
B	Sdh_cyt	e3ncyB1	A: alpha arrays	X: Alpha-beta plaits	H: Phage tail protein-like	T: Transmembrane protein 14A	F: Sdh_cyt	ECOD (v295.2)
A	PsaL	e3ncyA1	A: alpha arrays	X: Retrovirus capsid protein	H: Ubiquitin-related	T: Ubiquitin-like	F: PsaL	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
H [auth S]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
G [auth W]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
F [auth P]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
E [auth Q]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
G [auth W], H [auth S]	Antibody Fab Fragment	L-KAPPA	Mus musculus (house mouse)	IGKV4-5901, IGKJ101, IGKJ201, IGKC01, IGKC*02	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-2A_KAPPA	IMGT (202638-0)
E [auth Q], F [auth P]	Antibody Fab Fragment	VH-CH1	Mus musculus (house mouse)	IGHV1S1201, IGHV1S5601, IGHV1-7501, IGHJ401, IGHG2A01, IGHG2A02	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-2A_KAPPA	IMGT (202638-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
G [auth W], H [auth S]	Light Chain	IGKV4	Kappa	adic \| adic	SAbDab (2026-10-02)
E [auth Q], F [auth P]	Heavy Chain	IGHV1	-	adic \| adic	SAbDab (2026-10-02)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF13520	Amino acid permease (AA_permease_2)	Amino acid permease	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
G [auth W], H [auth S]	Fab Light chain	-	-	-
E [auth Q], F [auth P]	Fab Heavy chain	-	-	-
A, B, C, D	AdiC	antiporter activity amino acid transmembrane transporter activity active transmembrane transporter activity arginine:agmatine antiporter activity transporter activity carboxylic acid transmembrane transporter activity transmembrane transporter activity secondary active transmembrane transporter activity identical protein binding protein binding binding	-	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR002293	Amino acid/polyamine transporter I	Family
A, B, C, D	IPR050367	Amino acid-polyamine-organocation superfamily	Family

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B, C, D	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B, C, D	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C, D	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Amino Acid/Polyamine/Organocation (APC) Superfamily	AdiC Arginine:Agmatine Antiporter (with Fab fragment)