Monocarboxylate transporter 4

Monocarboxylate transporter 4 (MCT4) also known as solute carrier family 16 member 3 is a protein that in humans is encoded by the SLC16A3 gene.[5][6]

SLC16A3
Identifiers
AliasesSLC16A3, MCT 3, MCT 4, MCT-3, MCT-4, MCT3, MCT4, solute carrier family 16 member 3
External IDsOMIM: 603877 MGI: 1933438 HomoloGene: 37900 GeneCards: SLC16A3
Orthologs
SpeciesHumanMouse
Entrez

9123

80879

Ensembl

ENSG00000141526

ENSMUSG00000025161

UniProt

O15427

P57787

RefSeq (mRNA)

NM_001038653
NM_001038654
NM_030696

RefSeq (protein)

NP_001033742
NP_001033743
NP_109621

Location (UCSC)Chr 17: 82.22 – 82.26 MbChr 11: 120.84 – 120.85 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

Northern and western blotting and EST database analyses showed MCT4 to be widely expressed and especially so in glycolytic tissues such as white skeletal muscle fibers, astrocytes, white blood cells, chondrocytes, and some mammalian cell lines. Because of this, it has been proposed that the properties of MCT4 might be especially appropriate for export of lactate derived from glycolysis. MCT4 exhibits a lower affinity for most substrates and inhibitors than MCT1, with Km and Ki values some 5–10-fold higher. The high Km for pyruvate may be especially significant as this avoids loss of pyruvate from the cell which, were it to occur, would prevent removal of the reduced form of nicotinamide adenine dinucleotide (NADH) produced in glycolysis by reduction of pyruvate to lactate.

MCT4 can be upregulated by HIF-1α and AMPK.[7]

See also

References

Further reading


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