Page last updated: 2024-10-24

glucose: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: glucose(out) + Na+(out) = glucose(in) + Na+(in). [TC:2.A.21.3.-]

Glucose-sodium symporter activity is a transmembrane protein-mediated process that involves the simultaneous transport of glucose and sodium ions across a cell membrane. This process is driven by the electrochemical gradient of sodium ions, which is maintained by the sodium-potassium pump. The symporter protein binds both glucose and sodium ions, and the binding of one molecule increases the affinity for the other. This allows the transporter to move both molecules in the same direction, from an area of high concentration to an area of low concentration. The energy required for this process is provided by the movement of sodium ions down their electrochemical gradient. The glucose-sodium symporter is a crucial protein involved in the absorption of glucose from the small intestine into the bloodstream. It is also found in other tissues, such as the kidneys, where it plays a role in the reabsorption of glucose from the filtrate. The specific mechanism involves the binding of sodium ions to the transporter protein, which induces a conformational change in the protein, creating a binding site for glucose. The binding of glucose further stabilizes the conformational change, allowing both molecules to be transported across the membrane. This coordinated movement of glucose and sodium is essential for maintaining proper glucose homeostasis in the body.'
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Proteins (6)

ProteinDefinitionTaxonomy
Sodium/glucose cotransporter 2A sodium/glucose cotransporter 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P31639]Homo sapiens (human)
Sodium/glucose cotransporter 1A sodium/glucose cotransporter 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P13866]Homo sapiens (human)
Sodium/myo-inositol cotransporter 2A sodium/myo-inositol cotransporter 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q8WWX8]Homo sapiens (human)
Solute carrier family 5 member 4A probable glucose sensor protein SLC5A4 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9NY91]Homo sapiens (human)
Sodium/glucose cotransporter 2A sodium/glucose cotransporter 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P31639]Homo sapiens (human)
Sodium/glucose cotransporter 1A sodium/glucose cotransporter 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P13866]Homo sapiens (human)

Compounds (16)

CompoundDefinitionClassesRoles
inositol1D-chiro-inositol : Belonging to the inositol family of compounds, D-chiro-inositol (DCI) is an isomer of glucose. It is an important secondary messenger in insulin signal transduction.

inositol : Any cyclohexane-1,2,3,4,5,6-hexol.

Inositol: An isomer of glucose that has traditionally been considered to be a B vitamin although it has an uncertain status as a vitamin and a deficiency syndrome has not been identified in man. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1379) Inositol phospholipids are important in signal transduction.

muco-inositol : An inositol that is cyclohexane-1,2,3,4,5,6-hexol having a (1R,2R,3r,4R,5S,6r)-configuration.
cyclitol;
hexol
phloretindihydrochalconesantineoplastic agent;
plant metabolite
phlorhizinaryl beta-D-glucoside;
dihydrochalcones;
monosaccharide derivative
antioxidant;
plant metabolite
vexibinolsophoraflavanone G : A tetrahydroxyflavanone having a structure of naringenin bearing an additional hydroxyl substituent at position 2' as well as a (2R)-5-methyl-2-(prop-1-en-2-yl)hex-4-en-1-yl (lavandulyl) substituent at position 8'.

vexibinol: flavanol from Sophora; structure in first source; RN given refers to (S-(R*,S*))-isomer
(2S)-flavan-4-one;
4'-hydroxyflavanones;
tetrahydroxyflavanone
antimalarial;
antimicrobial agent;
antioxidant;
plant metabolite
2',4',6'-Trihydroxydihydrochalconechalcones
2',4',6'-trihydroxychalconepinocembrin chalcone : A member of the class of chalcones that is trans-chalcone substituted by hydroxy groups at positions 2', 4' and 6' respectively.

pinocembrin chalcone: isolated from Helichrysum trilineatum; structure in first source
chalconesantifungal agent;
plant metabolite
sergliflozin etabonatesergliflozin: a hypoglycemic agent that inhibits SGLT2 sodium-glucose transporter; structure in first sourceglycoside
remogliflozin etabonateremogliflozin etabonate: orally administered hypoglycemic agent; structure in first sourceglycoside
dapagliflozinaromatic ether;
C-glycosyl compound;
monochlorobenzenes
hypoglycemic agent;
sodium-glucose transport protein subtype 2 inhibitor
ipragliflozinglycoside
empagliflozinaromatic ether;
C-glycosyl compound;
monochlorobenzenes;
tetrahydrofuryl ether
hypoglycemic agent;
sodium-glucose transport protein subtype 2 inhibitor
1,5-anhydro-1-(5-(4-ethoxybenzyl)-2-methoxy-4-methylphenyl)-1-thioglucitoldiarylmethane
nothofaginnothofagin: a dihydrochalcone
canagliflozincanagliflozin hydrate : A hydrate that is the hemihydrate form of canagliflozin. Used for treatment of type II diabetes via inhibition of sodium-glucose transport protein subtype 2.C-glycosyl compound;
organofluorine compound;
thiophenes
hypoglycemic agent;
sodium-glucose transport protein subtype 2 inhibitor
pf 04971729ertugliflozin: structure in first sourcediarylmethane
deberza2-benzofurans