major facilitator superfamily (MFS) transporter facilitates the transport across cytoplasmic or internal membranes of one or more from a variety of substrates including ions, sugar phosphates, drugs, neurotransmitters, nucleosides, amino acids, and peptides
Major Facilitator Superfamily; The Major Facilitator Superfamily (MFS) is a large and diverse ...
2-436
2.31e-152
Major Facilitator Superfamily; The Major Facilitator Superfamily (MFS) is a large and diverse group of secondary transporters that includes uniporters, symporters, and antiporters. MFS proteins facilitate the transport across cytoplasmic or internal membranes of a variety of substrates including ions, sugar phosphates, drugs, neurotransmitters, nucleosides, amino acids, and peptides. They do so using the electrochemical potential of the transported substrates. Uniporters transport a single substrate, while symporters and antiporters transport two substrates in the same or in opposite directions, respectively, across membranes. MFS proteins are typically 400 to 600 amino acids in length, and the majority contain 12 transmembrane alpha helices (TMs) connected by hydrophilic loops. The N- and C-terminal halves of these proteins display weak similarity and may be the result of a gene duplication/fusion event. Based on kinetic studies and the structures of a few bacterial superfamily members, GlpT (glycerol-3-phosphate transporter), LacY (lactose permease), and EmrD (multidrug transporter), MFS proteins are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement. Bacterial members function primarily for nutrient uptake, and as drug-efflux pumps to confer antibiotic resistance. Some MFS proteins have medical significance in humans such as the glucose transporter Glut4, which is impaired in type II diabetes, and glucose-6-phosphate transporter (G6PT), which causes glycogen storage disease when mutated.
The actual alignment was detected with superfamily member PRK11462:
Pssm-ID: 475125 Cd Length: 460 Bit Score: 440.14 E-value: 2.31e-152
sugar (Glycoside-Pentoside-Hexuronide) transporter; The Glycoside-Pentoside-Hexuronide (GPH): ...
10-430
1.30e-122
sugar (Glycoside-Pentoside-Hexuronide) transporter; The Glycoside-Pentoside-Hexuronide (GPH):Cation Symporter Family (TC 2.A.2) GPH:cation symporters catalyze uptake of sugars in symport with a monovalent cation (H+ or Na+). Members of this family includes transporters for melibiose, lactose, raffinose, glucuronides, pentosides and isoprimeverose. Mutants of two groups of these symporters (the melibiose permeases of enteric bacteria, and the lactose permease of Streptococcus thermophilus) have been isolated in which altered cation specificity is observed or in which sugar transport is uncoupled from cation symport (i.e., uniport is catalyzed). The various members of the family can use Na+, H+ or Li, Na+ or Li+, H+ or Li+, or only H+ as the symported cation. All of these proteins possess twelve putative transmembrane a-helical spanners. [Transport and binding proteins, Carbohydrates, organic alcohols, and acids]
Pssm-ID: 273270 Cd Length: 437 Bit Score: 363.49 E-value: 1.30e-122
Salmonella enterica Na+/melibiose symporter MelB and similar transporters of the Major ...
10-430
1.46e-119
Salmonella enterica Na+/melibiose symporter MelB and similar transporters of the Major Facilitator Superfamily; This family is composed of Salmonella enterica Na+/melibiose symporter MelB, Major Facilitator Superfamily domain-containing proteins, MFSD2 and MFSD12, and other sugar transporters. MelB catalyzes the electrogenic symport of galactosides with Na+, Li+ or H+. The MFSD2 subfamily is composed of two vertebrate members, MFSD2A and MFSD2B. MFSD2A is more commonly called sodium-dependent lysophosphatidylcholine symporter 1 (NLS1). It is an LPC symporter that plays an essential role for blood-brain barrier formation and function. Inactivating mutations in MFSD2A cause a lethal microcephaly syndrome. MFSD2B is a potential risk or protect factor in the prognosis of lung adenocarcinoma. MelB-like family belongs to the Major Facilitator Superfamily (MFS) of membrane transport proteins, which are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Pssm-ID: 340890 [Multi-domain] Cd Length: 424 Bit Score: 355.37 E-value: 1.46e-119
sugar (Glycoside-Pentoside-Hexuronide) transporter; The Glycoside-Pentoside-Hexuronide (GPH): ...
10-430
1.30e-122
sugar (Glycoside-Pentoside-Hexuronide) transporter; The Glycoside-Pentoside-Hexuronide (GPH):Cation Symporter Family (TC 2.A.2) GPH:cation symporters catalyze uptake of sugars in symport with a monovalent cation (H+ or Na+). Members of this family includes transporters for melibiose, lactose, raffinose, glucuronides, pentosides and isoprimeverose. Mutants of two groups of these symporters (the melibiose permeases of enteric bacteria, and the lactose permease of Streptococcus thermophilus) have been isolated in which altered cation specificity is observed or in which sugar transport is uncoupled from cation symport (i.e., uniport is catalyzed). The various members of the family can use Na+, H+ or Li, Na+ or Li+, H+ or Li+, or only H+ as the symported cation. All of these proteins possess twelve putative transmembrane a-helical spanners. [Transport and binding proteins, Carbohydrates, organic alcohols, and acids]
Pssm-ID: 273270 Cd Length: 437 Bit Score: 363.49 E-value: 1.30e-122
Salmonella enterica Na+/melibiose symporter MelB and similar transporters of the Major ...
10-430
1.46e-119
Salmonella enterica Na+/melibiose symporter MelB and similar transporters of the Major Facilitator Superfamily; This family is composed of Salmonella enterica Na+/melibiose symporter MelB, Major Facilitator Superfamily domain-containing proteins, MFSD2 and MFSD12, and other sugar transporters. MelB catalyzes the electrogenic symport of galactosides with Na+, Li+ or H+. The MFSD2 subfamily is composed of two vertebrate members, MFSD2A and MFSD2B. MFSD2A is more commonly called sodium-dependent lysophosphatidylcholine symporter 1 (NLS1). It is an LPC symporter that plays an essential role for blood-brain barrier formation and function. Inactivating mutations in MFSD2A cause a lethal microcephaly syndrome. MFSD2B is a potential risk or protect factor in the prognosis of lung adenocarcinoma. MelB-like family belongs to the Major Facilitator Superfamily (MFS) of membrane transport proteins, which are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Pssm-ID: 340890 [Multi-domain] Cd Length: 424 Bit Score: 355.37 E-value: 1.46e-119
Major facilitator superfamily domain-containing protein 2 subfamily; The major facilitator ...
10-430
1.96e-20
Major facilitator superfamily domain-containing protein 2 subfamily; The major facilitator superfamily domain-containing protein 2 (MFSD2) subfamily is composed of two vertebrate members, MFSD2A amd MFSD2B. MFSD2A is more commonly called sodium-dependent lysophosphatidylcholine symporter 1 (NLS1). It is an LPC symporter that plays an essential role for blood-brain barrier formation and function. Inactivating mutations in MFSD2A cause a lethal microcephaly syndrome. MFSD2B is a potential risk or protect factor in the prognosis of lung adenocarcinoma. The MFSD2 subfamily belongs to the Salmonella enterica Na+/melibiose symporter like (MelB-like) family of the Major Facilitator Superfamily (MFS) of transporters. MFS proteins are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Pssm-ID: 340950 Cd Length: 446 Bit Score: 93.30 E-value: 1.96e-20
Major facilitator superfamily domain-containing protein 2B; Major facilitator superfamily ...
10-426
9.89e-14
Major facilitator superfamily domain-containing protein 2B; Major facilitator superfamily domain-containing protein 2B (MFSD2B) is closely related to MFSD2A, and their conserved genomic structure suggests that they are derived from the duplication of an ancestral gene. Variations of chromosome 2 gene expressions among patients with lung cancer or non-cancer identified MFSD2B as a potential risk or protect factor in the prognosis of lung adenocarcinoma. MFSD2B belongs to the Salmonella enterica Na+/melibiose symporter like (MelB-like) family of the Major Facilitator Superfamily (MFS) of transporters. MFS proteins are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Pssm-ID: 341010 Cd Length: 416 Bit Score: 72.54 E-value: 9.89e-14
Sodium-dependent lysophosphatidylcholine symporter 1 of the Major Facilitator Superfamily of ...
10-430
2.22e-12
Sodium-dependent lysophosphatidylcholine symporter 1 of the Major Facilitator Superfamily of transporters; Sodium-dependent lysophosphatidylcholine (LPC) symporter 1 (NLS1) is also called major facilitator superfamily domain-containing protein 2A (MFSD2A). NLS1/MFSD2A is an LPC symporter that plays an essential role for blood-brain barrier formation and function. It also transports the essential omega-3 fatty acid docosahexaenoic acid (DHA), which is essential for normal brain growth and cognitive function, in the form of LPC into the brain across the blood-brain barrier. Inactivating mutations in MFSD2A cause a lethal microcephaly syndrome. NLS1/MFSD2A belongs to the Salmonella enterica Na+/melibiose symporter like (MelB-like) family of the Major Facilitator Superfamily (MFS) of transporters. MFS proteins are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Pssm-ID: 341009 Cd Length: 419 Bit Score: 68.30 E-value: 2.22e-12
Major Facilitator Superfamily; The Major Facilitator Superfamily (MFS) is a large and diverse ...
34-384
6.11e-09
Major Facilitator Superfamily; The Major Facilitator Superfamily (MFS) is a large and diverse group of secondary transporters that includes uniporters, symporters, and antiporters. MFS proteins facilitate the transport across cytoplasmic or internal membranes of a variety of substrates including ions, sugar phosphates, drugs, neurotransmitters, nucleosides, amino acids, and peptides. They do so using the electrochemical potential of the transported substrates. Uniporters transport a single substrate, while symporters and antiporters transport two substrates in the same or in opposite directions, respectively, across membranes. MFS proteins are typically 400 to 600 amino acids in length, and the majority contain 12 transmembrane alpha helices (TMs) connected by hydrophilic loops. The N- and C-terminal halves of these proteins display weak similarity and may be the result of a gene duplication/fusion event. Based on kinetic studies and the structures of a few bacterial superfamily members, GlpT (glycerol-3-phosphate transporter), LacY (lactose permease), and EmrD (multidrug transporter), MFS proteins are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement. Bacterial members function primarily for nutrient uptake, and as drug-efflux pumps to confer antibiotic resistance. Some MFS proteins have medical significance in humans such as the glucose transporter Glut4, which is impaired in type II diabetes, and glucose-6-phosphate transporter (G6PT), which causes glycogen storage disease when mutated.
Pssm-ID: 349949 [Multi-domain] Cd Length: 378 Bit Score: 57.44 E-value: 6.11e-09
Purine ribonucleoside efflux pump NepI and similar transporters of the Major Facilitator ...
154-391
8.97e-06
Purine ribonucleoside efflux pump NepI and similar transporters of the Major Facilitator Superfamily; This family is composed of purine efflux pumps such as Escherichia coli NepI and Bacillus subtilis PbuE, sugar efflux transporters such as Corynebacterium glutamicum arabinose efflux permease, multidrug resistance (MDR) transporters such as Streptomyces lividans chloramphenicol resistance protein (CmlR), and similar proteins. NepI and PbuE are involved in the efflux of purine ribonucleosides such as guanosine, adenosine and inosine, as well as purine bases like guanine, adenine, and hypoxanthine, and purine base analogs. They play a role in the maintenance of cellular purine base pools, as well as in protecting the cells and conferring resistance against toxic purine base analogs such as 6-mercaptopurine. MDR transporters are drug/H+ antiporters (DHA) that mediate the efflux of a variety of drugs and toxic compounds, and confer resistance to these compounds. The NepI-like family belongs to the Major Facilitator Superfamily (MFS) of membrane transport proteins, which are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Pssm-ID: 340882 [Multi-domain] Cd Length: 370 Bit Score: 47.54 E-value: 8.97e-06
Macrolide efflux protein A and similar proteins of the Major Facilitator Superfamily of ...
179-391
9.60e-05
Macrolide efflux protein A and similar proteins of the Major Facilitator Superfamily of transporters; This family is composed of Streptococcus pyogenes macrolide efflux protein A (MefA) and similar transporters, many of which remain uncharacterized. Some members may be multidrug resistance (MDR) transporters, which are drug/H+ antiporters (DHAs) that mediate the efflux of a variety of drugs and toxic compounds, conferring resistance to these compounds. MefA confers resistance to 14-membered macrolides including erythromycin and to 15-membered macrolides. It functions as an efflux pump to regulate intracellular macrolide levels. The MefA-like family belongs to the Major Facilitator Superfamily (MFS) of membrane transport proteins, which are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Pssm-ID: 340863 [Multi-domain] Cd Length: 383 Bit Score: 44.53 E-value: 9.60e-05
Major facilitator superfamily domain-containing protein 12; Major facilitator superfamily ...
10-151
4.46e-04
Major facilitator superfamily domain-containing protein 12; Major facilitator superfamily domain-containing protein 12 (MFSD12) protein subfamily includes a group of uncharacterized proteins similar to human MFSD2. MFSD2 is composed of two vertebrate members, MFSD2A and MFSD2B. MFSD2A is an LPC symporter that plays an essential role for blood-brain barrier formation and function. MFSD2B is a potential risk or protect factor in the prognosis of lung adenocarcinoma. The MFSD12 subfamily belongs to the Salmonella enterica Na+/melibiose symporter like (MelB-like) family of the Major Facilitator Superfamily (MFS) of transporters. MFS proteins are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Pssm-ID: 341044 Cd Length: 438 Bit Score: 42.24 E-value: 4.46e-04
Solute carrier family 45 and similar sugar transporters of the Major Facilitator Superfamily ...
39-165
7.46e-04
Solute carrier family 45 and similar sugar transporters of the Major Facilitator Superfamily of transporters; This group includes the solute carrier 45 (SLC45) family as well as plant sucrose transporters (SUCs or SUTs) and similar proteins such as Schizosaccharomyces pombe general alpha-glucoside permease. the SLC45 family is composed of four (A1-A4) vertebrate proteins as well as related insect proteins such as Drosophila sucrose transporter SCRT or Slc45-1. Members of this group transport sucrose and other sugars like maltose into the cell, with the concomitant uptake of protons (symport system). Plant sucrose transporters are crucial to carbon partitioning, playing a key role in phloem loading/unloading. They play a key role in loading and unloading of sucrose into the phloem and as a result, they control sucrose distribution throughout the whole plant and drive the osmotic flow system in the phloem. They also play a role in the exchange of sucrose between beneficial symbionts (mycorrhiza and Rhizobium) as well as pathogens such as nematodes and parasitic fungi. There are nine sucrose transporter genes in Arabidopsis and five in rice. Vertebrate SLC45 family proteins have been implicated in the regulation of glucose homoeostasis in the brain (SLC45A1), with skin and hair pigmentation (SLC45A2), and with prostate cancer and myelination (SLC45A3). Mutations in SLC45A2, also called MATP (membrane-associated transporter protein) or melanoma antigen AIM1, cause oculocutaneous albinism type 4 (OCA4), an autosomal recessive disorder of melanin biosynthesis that results in congenital hypopigmentation of ocular and cutaneous tissues. The SLC45 family and related sugar transporters belong to the Major Facilitator Superfamily (MFS) of membrane transport proteins, which are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Pssm-ID: 340871 [Multi-domain] Cd Length: 421 Bit Score: 41.84 E-value: 7.46e-04
Multidrug transporter MdfA and similar multidrug resistance (MDR) transporters of the Major ...
184-328
1.91e-03
Multidrug transporter MdfA and similar multidrug resistance (MDR) transporters of the Major Facilitator Superfamily; This family is composed of bacterial multidrug resistance (MDR) transporters including several proteins from Escherichia coli such as MdfA (also called chloramphenicol resistance pump Cmr), EmrD, MdtM, MdtL, bicyclomycin resistance protein (also called sulfonamide resistance protein), and the uncharacterized inner membrane transport protein YdhC. EmrD is a proton-dependent secondary transporter, first identified as an efflux pump for uncouplers of oxidative phosphorylation. It expels a range of drug molecules and amphipathic compounds across the inner membrane of E. coli. Similarly, MdfA is a secondary multidrug transporter that exports a broad spectrum of structurally and electrically dissimilar toxic compounds. These MDR transporters are drug/H+ antiporters (DHA) belonging to the Major Facilitator Superfamily (MFS) of membrane transport proteins, which are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Pssm-ID: 340878 [Multi-domain] Cd Length: 379 Bit Score: 40.25 E-value: 1.91e-03
Solute carrier family 18 member B1 of the Major Facilitator Superfamily of transporters; ...
41-195
4.41e-03
Solute carrier family 18 member B1 of the Major Facilitator Superfamily of transporters; Solute carrier family 18 member B1 (SLC18B1) is the fourth member of the SLC18 transporter family, which includes vesicular monoamine transporters and vesicular acetylcholine transporter. It is predominantly expressed in the hippocampus and is associated with vesicles in astrocytes. It actively transports spermine and spermidine by exchange of H(+), and has been suggested to be a vesicular polyamine transporter (VPAT). SLC18B1 belongs to the bacterial MdtG-like and eukaryotic solute carrier 18 (SLC18) family of the Major Facilitator Superfamily (MFS) of transporters. MFS proteins are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Pssm-ID: 340943 [Multi-domain] Cd Length: 390 Bit Score: 39.12 E-value: 4.41e-03
bacterial MdtG-like and eukaryotic solute carrier 18 (SLC18) family of the Major Facilitator ...
34-389
5.29e-03
bacterial MdtG-like and eukaryotic solute carrier 18 (SLC18) family of the Major Facilitator Superfamily of transporters; This family is composed of eukaryotic solute carrier 18 (SLC18) family transporters and related bacterial multidrug resistance (MDR) transporters including several proteins from Escherichia coli such as multidrug resistance protein MdtG, from Bacillus subtilis such as multidrug resistance proteins 1 (Bmr1) and 2 (Bmr2), and from Staphylococcus aureus such as quinolone resistance protein NorA. The family also includes Escherichia coli arabinose efflux transporters YfcJ and YhhS. MDR transporters are drug/H+ antiporters (DHA) that mediate the efflux of a variety of drugs and toxic compounds, and confer resistance to these compounds. The SLC18 transporter family includes vesicular monoamine transporters (VAT1 and VAT2), vesicular acetylcholine transporter (VAChT), and SLC18B1, which is proposed to be a vesicular polyamine transporter (VPAT). The MdtG/SLC18 family belongs to the Major Facilitator Superfamily (MFS) of membrane transport proteins, which are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Pssm-ID: 340883 [Multi-domain] Cd Length: 375 Bit Score: 38.71 E-value: 5.29e-03
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
of the residues that compose this conserved feature have been mapped to the query sequence.
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