Annotations: 6CSE

Crystal structure of sodium/alanine symporter AgcS with L-alanine bound

External Resource: Annotation

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: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD
Membrane Protein Annotation: mpstruc

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
E [auth C]	Ig_2	e6cseC1	A: alpha arrays	X: PriB N-terminal domain-like	H: Ubiquitin-related	T: Ubiquitin-like	F: Ig_2	ECOD (v295.2)
C [auth M]	MACPF	e6cseM1	A: alpha arrays	X: PriB N-terminal domain-like	H: Ubiquitin-related	T: Ubiquitin-like	F: MACPF	ECOD (v295.2)
F [auth L]	C1-set	e6cseL1	A: alpha arrays	X: PriB N-terminal domain-like	H: Ubiquitin-related	T: Ubiquitin-like	F: C1-set	ECOD (v295.2)
B	C1-set	e6cseB1	A: alpha arrays	X: PriB N-terminal domain-like	H: Ubiquitin-related	T: Ubiquitin-like	F: C1-set	ECOD (v295.2)
D [auth H]	C1-set	e6cseH1	A: alpha arrays	X: PriB N-terminal domain-like	H: Ubiquitin-related	T: Ubiquitin-like	F: C1-set	ECOD (v295.2)
A	C1-set	e6cseA1	A: alpha arrays	X: PriB N-terminal domain-like	H: Ubiquitin-related	T: Ubiquitin-like	F: C1-set	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
F [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

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
B, F [auth L]	Antibody Fab Fragment	L-KAPPA	Mus musculus (house mouse)	IGKV12-4401, IGKJ201, IGKC01, IGKC02	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202635-0)
A, D [auth H]	Antibody Fab Fragment	VH-CH1	Mus musculus (house mouse)	IGHV6-601, IGHJ103, IGHG1*02	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202635-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B, F [auth L]	Light Chain	IGKV12	Kappa	sodium/alanine symporter agcs	SAbDab (2026-09-11)
A, D [auth H]	Heavy Chain	IGHV6	-	sodium/alanine symporter agcs	SAbDab (2026-09-11)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C [auth M], E [auth C]	PF01235	Sodium:alanine symporter family (Na_Ala_symp)	Sodium:alanine symporter family		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth M], E [auth C]	Sodium/alanine symporter AgcS	glycine transmembrane transporter activity monoatomic cation transmembrane transporter activity amino acid:sodium symporter activity solute:sodium symporter activity solute:monoatomic cation symporter activity carboxylic acid transmembrane transporter activity sodium ion transmembrane transporter activity secondary active transmembrane transporter activity glycine:sodium symporter activity neutral L-amino acid:sodium symporter activity amino acid transmembrane transporter activity organic acid:sodium symporter activity neutral L-amino acid transmembrane transporter activity active transmembrane transporter activity amino acid:monoatomic cation symporter activity glycine transmembrane transporter activity monoatomic cation transmembrane transporter activity amino acid:sodium symporter activity solute:sodium symporter activity solute:monoatomic cation symporter activity carboxylic acid transmembrane transporter activity sodium ion transmembrane transporter activity secondary active transmembrane transporter activity glycine:sodium symporter activity neutral L-amino acid:sodium symporter activity amino acid transmembrane transporter activity organic acid:sodium symporter activity neutral L-amino acid transmembrane transporter activity active transmembrane transporter activity amino acid:monoatomic cation symporter activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity symporter activity alanine transmembrane transporter activity alanine:sodium symporter activity	-	cell periphery cellular anatomical structure plasma membrane membrane
B, F [auth L]	Monoclonal antibody FAB light chain	-	-	-
A, D [auth H]	Monoclonal antibody FAB heavy chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth M], E [auth C]	IPR001463	Sodium:alanine symporter	Family

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
C [auth M], E [auth C]	OPM	Transmembrane	Alpha-helical polytopic	APC (Amino acid-Polyamine-organoCation) superfamily	Alanine:cation symporter

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
C [auth M], E [auth C]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
C [auth M], E [auth C]	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
C [auth M], E [auth C]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Amino Acid/Polyamine/Organocation (APC) Superfamily	AgcS sodium/alanine symporter with bound L-alanine

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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.