Monocarboxylate transporters 11 and 13 of the Major Facilitator Superfamily of transporters
Monocarboxylate transporters 11 (MCT11) and 13 (MCT13) are also called Solute carrier family 16 members 11 (SLC16A11) and 13 (SLC16A13), respectively. They are orphan transporters whose substrates are yet to be determined. MCT11 is expressed in skin, lung, ovary, breast, lung, pancreas, retinal pigment epithelium, and choroid plexus. Genetic variants in SLC16A11, the gene encoding MCT11, are associated with type 2 diabetes in Mexican and other Latin American populations. MCT13 is expressed in breast and bone marrow stem cells. MCT11/13 belongs to the Monocarboxylate transporter (MCT) family of the Major Facilitator Superfamily (MFS) of membrane transport proteins. MFS proteins are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Feature 1:putative chemical substrate binding pocket [chemical binding site]
Evidence:
Comment:based on the structures of MFS transporters with bound substrates, substrate analogs, and/or inhibitors
Comment:since MFS proteins facilitate the transport of many different substrates including ions, sugar phosphates, drugs, neurotransmitters, nucleosides, amino acids, and peptides, the residues involved in substrate binding may not be strictly conserved among superfamily members
Comment:the substrate binding site or translocation pore has access to both sides of the membrane in an alternating fashion through a conformational change of the MFS transporter
Jiyao W et al.(2023). "The conserved domain database in 2023.",