Page last updated: 2024-10-24

amino acid:sodium symporter activity

Definition

Target type: molecularfunction

Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: amino acid(out) + Na+(out) = amino acid(in) + Na+(in). [GOC:ai]

Amino acid:sodium symporter activity refers to the transmembrane transport of amino acids across cell membranes, specifically by coupling the movement of amino acids with the inward movement of sodium ions. This process is driven by the electrochemical gradient of sodium ions, which are typically present at higher concentrations outside the cell. The symporter protein facilitates the simultaneous movement of both amino acids and sodium ions in the same direction, effectively using the energy stored in the sodium gradient to power the transport of amino acids. This mechanism is vital for maintaining cellular homeostasis, nutrient uptake, and overall cell function. It plays a crucial role in various physiological processes, including:

* **Nutrient absorption:** The intestinal epithelium utilizes amino acid:sodium symporters to efficiently absorb dietary amino acids from the gut lumen. This process provides the body with essential building blocks for protein synthesis and other vital functions.

* **Cellular uptake:** Many cell types rely on amino acid:sodium symporters to acquire specific amino acids required for their growth, maintenance, and signaling pathways.

* **Neurotransmission:** In the brain, amino acid:sodium symporters play a crucial role in the reuptake of neurotransmitters, ensuring the proper functioning of neuronal communication.

* **Regulation of intracellular amino acid levels:** These transporters help maintain a balance of amino acids within cells, preventing imbalances that could disrupt cellular processes.

In essence, amino acid:sodium symporter activity is an energy-efficient and highly regulated transport mechanism that ensures the proper uptake and distribution of amino acids within the body, playing a critical role in a multitude of biological processes.'
"

Proteins (2)

ProteinDefinitionTaxonomy
Sodium- and chloride-dependent GABA transporter 2A sodium- and chloride-dependent GABA transporter 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9NSD5]Homo sapiens (human)
Sodium- and chloride-dependent taurine transporterA sodium- and chloride-dependent taurine transporter that is encoded in the genome of human. [PRO:DNx, UniProtKB:P31641]Homo sapiens (human)

Compounds (10)

CompoundDefinitionClassesRoles
gamma-aminobutyric acidgamma-aminobutyric acid : A gamma-amino acid that is butanoic acid with the amino substituent located at C-4.

gamma-Aminobutyric Acid: The most common inhibitory neurotransmitter in the central nervous system.
amino acid zwitterion;
gamma-amino acid;
monocarboxylic acid
human metabolite;
neurotransmitter;
Saccharomyces cerevisiae metabolite;
signalling molecule
beta-alanineamino acid zwitterion;
beta-amino acid
agonist;
fundamental metabolite;
human metabolite;
inhibitor;
neurotransmitter
2,3-diaminopropionic acid3-aminoalanine : A diamino acid that is alanine in which one of the hydrogens of the methyl group is replaced by an amino group.alanine derivative;
amino acid zwitterion;
beta-amino acid;
diamino acid;
non-proteinogenic alpha-amino acid
Escherichia coli metabolite
taurineamino sulfonic acid;
zwitterion
antioxidant;
Escherichia coli metabolite;
glycine receptor agonist;
human metabolite;
mouse metabolite;
nutrient;
radical scavenger;
Saccharomyces cerevisiae metabolite
guvacineguvacine : A alpha,beta-unsaturated monocarboxylic acid that is nicotinic acid which has been hydrogenated at the 1-2 and 5-6 positions of the pyridine ring.

guvacine: RN given refers to parent cpd
alpha,beta-unsaturated monocarboxylic acid;
beta-amino acid;
pyridine alkaloid;
secondary amino compound;
tetrahydropyridine
GABA reuptake inhibitor;
plant metabolite
nipecotic acidnipecotic acid : A piperidinemonocarboxylic acid that is piperidine in which one of the hydrogens at position 3 is substituted by a carboxylic acid group.

nipecotic acid: RN given refers to cpd without isomeric designation
beta-amino acid;
piperidinemonocarboxylic acid
n-(1-benzyl-4-piperidinyl)-2,4-dichlorobenzamideN-(1-benzyl-4-piperidinyl)-2,4-dichlorobenzamide: inhibits the betaine-GABA transporter 1; structure in first source
2-ethoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamidepiperidines
nnc 05-2090NNC 05-2090: structure given in first sourcecarbazoles
snap 5114