Annotations: 8GNK

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
B [auth L]	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
C [auth H]	Heavy Chain	IGHV5	-	sodium- and chloride-dependent gaba transporter 1	SAbDab (2025-12-19)
B [auth L]	Light Chain	IGKV4	Kappa	sodium- and chloride-dependent gaba transporter 1	SAbDab (2025-12-19)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth H]	fragment antigen binding 9D5 heavy chain	-	-	-
B [auth L]	Fragment antigen binding light chain	-	-	-
A	Sodium- and chloride-dependent GABA transporter 1	monoatomic cation transmembrane transporter activity amino acid:sodium symporter activity solute:sodium symporter activity solute:monoatomic cation symporter activity sodium ion transmembrane transporter activity secondary active transmembrane transporter activity 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 monoatomic cation transmembrane transporter activity amino acid:sodium symporter activity solute:sodium symporter activity solute:monoatomic cation symporter activity sodium ion transmembrane transporter activity secondary active transmembrane transporter activity 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 monoatomic anion transmembrane transporter activity chloride transmembrane transporter activity monoatomic anion:sodium symporter activity sodium:chloride symporter activity monoatomic anion:monoatomic cation symporter activity chloride:monoatomic cation symporter activity gamma-aminobutyric acid:sodium:chloride symporter activity secondary active monocarboxylate transmembrane transporter activity gamma-aminobutyric acid transmembrane transporter activity monocarboxylate:sodium symporter activity carboxylic acid transmembrane transporter activity organic acid:sodium symporter activity monocarboxylic acid transmembrane transporter activity cation binding ion binding binding metal ion binding small molecule binding identical protein binding protein binding	response to stimulus response to chemical response to xenobiotic stimulus behavior multicellular organismal process system process learning learning or memory nervous system process cognition response to metal ion response to calcium ion transport monoatomic ion transmembrane transport response to stimulus response to chemical response to xenobiotic stimulus behavior multicellular organismal process system process learning learning or memory nervous system process cognition response to metal ion response to calcium ion transport monoatomic ion transmembrane transport establishment of localization chloride transport transmembrane transport localization chloride transmembrane transport monoatomic anion transport monoatomic anion transmembrane transport monoatomic ion transport cellular process inorganic anion transport memory response to toxic substance cellular component organization cell junction organization synapse organization cellular component organization or biogenesis response to carbohydrate response to sucrose response to disaccharide response to oxygen-containing compound import into cell cellular localization establishment of localization in cell neurotransmitter uptake neurotransmitter transport neurotransmitter reuptake sodium ion transmembrane transport metal ion transport monoatomic cation transmembrane transport monoatomic cation transport sodium ion transport import across plasma membrane sodium ion import across plasma membrane inorganic cation import across plasma membrane inorganic ion import across plasma membrane response to lead ion response to amine response to methamphetamine hydrochloride response to nitrogen compound amino acid transport associative learning regulation of localization nitrogen compound transport positive regulation of biological process positive regulation of amine transport positive regulation of secretion gamma-aminobutyric acid transport regulation of amino acid transport regulation of biological process organic anion transport gamma-aminobutyric acid secretion carboxylic acid transport regulation of transport secretion regulation of gamma-aminobutyric acid secretion biological regulation positive regulation of gamma-aminobutyric acid secretion acid secretion regulation of secretion positive regulation of organic acid transport organic acid transport amine transport positive regulation of transport positive regulation of amino acid transport regulation of organic acid transport regulation of amine transport gamma-aminobutyric acid import acidic amino acid transport inorganic anion import across plasma membrane negative regulation of synaptic transmission, GABAergic regulation of cellular process negative regulation of signaling signaling modulation of chemical synaptic transmission negative regulation of biological process negative regulation of synaptic transmission negative regulation of cell communication cell communication synaptic signaling negative regulation of cellular process trans-synaptic signaling regulation of signaling synaptic transmission, GABAergic cell-cell signaling chemical synaptic transmission regulation of trans-synaptic signaling anterograde trans-synaptic signaling regulation of cell communication regulation of synaptic transmission, GABAergic response to purine-containing compound response to cocaine response to alkaloid response to lipid response to estradiol	cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane cell surface presynapse presynaptic membrane GABA-ergic synapse cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane cell surface presynapse presynaptic membrane GABA-ergic synapse somatodendritic compartment cell body neuronal cell body axon cell projection neuron projection plasma membrane bounded cell projection

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR002980	Sodium:neurotransmitter symporter, GABA, GAT-1	Family
A	IPR000175	Sodium:neurotransmitter symporter	Family
A	IPR037272	Sodium:neurotransmitter symporter superfamily	Homologous Superfamily

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A	OPM	Transmembrane	Alpha-helical polytopic	APC (Amino acid-Polyamine-organoCation) superfamily	Neurotransmitter: sodium symporter

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	Neurotransmitter Sodium Symporter (NSS) Family	GABA transporter 1 (GAT1), cytosol-facing, substrate-bound

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.