Annotations: 9CP5

Cryo-EM structure of human GAT3, apo state, inward-open conformation

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
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)
C [auth L]	Reovirus_L2_GTase	e9cp5L1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Reovirus_L2_GTase	ECOD (v295)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth L]	Light Chain	IGKV4	Kappa	sodium- and chloride-dependent gaba transporter 3	SAbDab (2026-06-26)
B [auth H]	Heavy Chain	IGHV5	-	sodium- and chloride-dependent gaba transporter 3	SAbDab (2026-06-26)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth L]	9D5 light chain	-	-	-
B [auth H]	9D5 heavy chain	-	-	-
A	Sodium- and chloride-dependent GABA transporter 3	transporter activity monocarboxylic acid transmembrane transporter activity carboxylic acid transmembrane transporter activity transmembrane transporter activity monoatomic cation transmembrane transporter activity monoatomic anion transmembrane transporter activity chloride transmembrane transporter activity solute:sodium symporter activity amino acid:sodium symporter activity solute:monoatomic cation symporter activity gamma-aminobutyric acid:sodium:chloride symporter activity monoatomic anion:monoatomic cation symporter activity secondary active transmembrane transporter activity secondary active monocarboxylate transmembrane transporter activity transporter activity monocarboxylic acid transmembrane transporter activity carboxylic acid transmembrane transporter activity transmembrane transporter activity monoatomic cation transmembrane transporter activity monoatomic anion transmembrane transporter activity chloride transmembrane transporter activity solute:sodium symporter activity amino acid:sodium symporter activity solute:monoatomic cation symporter activity gamma-aminobutyric acid:sodium:chloride symporter activity monoatomic anion:monoatomic cation symporter activity secondary active transmembrane transporter activity secondary active monocarboxylate transmembrane transporter activity gamma-aminobutyric acid transmembrane transporter activity amino acid:monoatomic cation symporter activity monoatomic anion:sodium symporter activity sodium ion transmembrane transporter activity sodium:chloride symporter activity chloride:monoatomic cation symporter activity amino acid transmembrane transporter activity organic acid:sodium symporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity metal ion transmembrane transporter activity symporter activity binding amino acid binding sulfur compound transmembrane transporter activity taurine transmembrane transporter activity taurine:sodium symporter activity	localization transport neurotransmitter transport establishment of localization response to stimulus response to chemical response to xenobiotic stimulus import into cell gamma-aminobutyric acid reuptake cellular localization nitrogen compound transport carboxylic acid transport amino acid neurotransmitter reuptake organic acid transport localization transport neurotransmitter transport establishment of localization response to stimulus response to chemical response to xenobiotic stimulus import into cell gamma-aminobutyric acid reuptake cellular localization nitrogen compound transport carboxylic acid transport amino acid neurotransmitter reuptake organic acid transport amino acid transport gamma-aminobutyric acid transport establishment of localization in cell neurotransmitter uptake cellular process neurotransmitter reuptake monocarboxylic acid transport monoatomic ion transmembrane transport sodium ion transmembrane transport metal ion transport monoatomic cation transmembrane transport transmembrane transport monoatomic ion transport monoatomic cation transport sodium ion transport	cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane presynapse presynaptic membrane cell projection GABA-ergic synapse

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR002982	Sodium:neurotransmitter symporter, GABA, GAT-3	Family
A	IPR000175	Sodium:neurotransmitter symporter	Family
A	IPR037272	Sodium:neurotransmitter symporter superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	: P48066	melanoma atypical teratoid rhabdoid tumor large cell medulloblastoma cutaneous melanoma malignant glioma schizophrenia glioblastoma medulloblastoma Sjogren syndrome

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	Neurotransmitter Sodium Symporter (NSS) Family	GABA transporter GAT3, apo state, inward-open conformation

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