Page last updated: 2024-10-24

hexose transmembrane transport

Definition

Target type: biologicalprocess

The process in which hexose is transported across a membrane. Hexoses are aldoses with a chain of six carbon atoms in the molecule. [GOC:vw]

Hexose transmembrane transport is a crucial biological process that enables cells to uptake essential sugars like glucose and fructose from their surroundings. This process involves the movement of these sugars across the cell membrane, a selectively permeable barrier that separates the cell's interior from its external environment.

The transport of hexoses across the cell membrane is facilitated by specific transmembrane proteins known as hexose transporters. These proteins act as gates, allowing the passage of hexoses while preventing the movement of other molecules. There are two main mechanisms of hexose transport: facilitated diffusion and active transport.

**Facilitated diffusion** is a passive process driven by the concentration gradient of the hexose. When the concentration of hexose is higher outside the cell than inside, the transporter protein binds to the hexose molecule on the extracellular side of the membrane. This binding induces a conformational change in the protein, allowing the hexose to move across the membrane and into the cell. This process does not require energy expenditure by the cell.

**Active transport**, on the other hand, is an energy-requiring process that moves hexoses against their concentration gradient, meaning from a lower concentration area to a higher concentration area. This is achieved through the use of specialized transporter proteins coupled with energy sources such as ATP. An example of active transport is the sodium-glucose cotransporter (SGLT) system, which uses the energy derived from the inward movement of sodium ions to drive the uptake of glucose into the cell.

The transport of hexoses is essential for cellular function, as these sugars serve as the primary energy source for many metabolic processes. Glucose, for example, is used by cells to produce ATP, the primary energy currency of the cell. Fructose is also utilized by the liver for glycogen synthesis and energy production.

Overall, the hexose transmembrane transport system plays a critical role in maintaining cellular homeostasis by ensuring the uptake of essential sugars, thereby supporting fundamental cellular processes.'
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Proteins (4)

ProteinDefinitionTaxonomy
Solute carrier family 2, facilitated glucose transporter member 9A solute carrier family 2, facilitated glucose transporter member 9 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9NRM0]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)
Solute carrier family 2, facilitated glucose transporter member 9A solute carrier family 2, facilitated glucose transporter member 9 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9NRM0]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)

Compounds (17)

CompoundDefinitionClassesRoles
orotic acidorotic acid : A pyrimidinemonocarboxylic acid that is uracil bearing a carboxy substituent at position C-6.

Orotic Acid: An intermediate product in PYRIMIDINE synthesis which plays a role in chemical conversions between DIHYDROFOLATE and TETRAHYDROFOLATE.
pyrimidinemonocarboxylic acidEscherichia coli metabolite;
metabolite;
mouse metabolite
uric acid6-hydroxy-1H-purine-2,8(7H,9H)-dione : A tautomer of uric acid having oxo groups at C-2 and C-8 and a hydroxy group at C-6.

7,9-dihydro-1H-purine-2,6,8(3H)-trione : An oxopurine in which the purine ring is substituted by oxo groups at positions 2, 6, and 8.

uric acid : An oxopurine that is the final oxidation product of purine metabolism.

Uric Acid: An oxidation product, via XANTHINE OXIDASE, of oxypurines such as XANTHINE and HYPOXANTHINE. It is the final oxidation product of purine catabolism in humans and primates, whereas in most other mammals URATE OXIDASE further oxidizes it to ALLANTOIN.
uric acidEscherichia coli metabolite;
human metabolite;
mouse metabolite
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