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 ...
21-411
1.42e-59
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 cd17485:
Pssm-ID: 475125 [Multi-domain] Cd Length: 386 Bit Score: 198.99 E-value: 1.42e-59
Major facilitator superfamily domain containing 3 protein; Major facilitator superfamily ...
21-411
1.42e-59
Major facilitator superfamily domain containing 3 protein; Major facilitator superfamily domain containing 3 protein (MFSD3) is a predicted acetyl-CoA transporter. As an atypical putative membrane-bound solute carrier (SLC), MFSD3 is most likely to be functionally active in the plasma membrane and not in any intracellular organelles. MFSD3 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: 341038 [Multi-domain] Cd Length: 386 Bit Score: 198.99 E-value: 1.42e-59
siderophore transporter, RhtX/FptX family; RhtX from Sinorhizobium meliloti 2011 and FptX from ...
17-410
4.22e-24
siderophore transporter, RhtX/FptX family; RhtX from Sinorhizobium meliloti 2011 and FptX from Pseudomonas aeruginosa appear to be single polypeptide transporters, from the major facilitator family (see pfam07690) for import of siderophores as a means to import iron. This function was suggested by proximity to siderophore biosynthesis genes and then confirmed by study of knockout and heterologous expression phenotypes. [Transport and binding proteins, Cations and iron carrying compounds]
Pssm-ID: 131765 Cd Length: 390 Bit Score: 103.05 E-value: 4.22e-24
Major facilitator superfamily domain containing 3 protein; Major facilitator superfamily ...
21-411
1.42e-59
Major facilitator superfamily domain containing 3 protein; Major facilitator superfamily domain containing 3 protein (MFSD3) is a predicted acetyl-CoA transporter. As an atypical putative membrane-bound solute carrier (SLC), MFSD3 is most likely to be functionally active in the plasma membrane and not in any intracellular organelles. MFSD3 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: 341038 [Multi-domain] Cd Length: 386 Bit Score: 198.99 E-value: 1.42e-59
siderophore transporter, RhtX/FptX family; RhtX from Sinorhizobium meliloti 2011 and FptX from ...
17-410
4.22e-24
siderophore transporter, RhtX/FptX family; RhtX from Sinorhizobium meliloti 2011 and FptX from Pseudomonas aeruginosa appear to be single polypeptide transporters, from the major facilitator family (see pfam07690) for import of siderophores as a means to import iron. This function was suggested by proximity to siderophore biosynthesis genes and then confirmed by study of knockout and heterologous expression phenotypes. [Transport and binding proteins, Cations and iron carrying compounds]
Pssm-ID: 131765 Cd Length: 390 Bit Score: 103.05 E-value: 4.22e-24
AmpG and similar transporters of the Major Facilitator Superfamily; AmpG acts as an inner ...
26-406
2.07e-22
AmpG and similar transporters of the Major Facilitator Superfamily; AmpG acts as an inner membrane permease in the beta-lactamase induction system and in peptidoglycan recycling. It transports meuropeptide from the periplasm into the cytosol in gram-negative bacteria, which is essential for the induction of the ampC encoding beta-lactamase. The AmpG 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: 341039 [Multi-domain] Cd Length: 387 Bit Score: 98.06 E-value: 2.07e-22
bacterial MdtG-like and eukaryotic solute carrier 18 (SLC18) family of the Major Facilitator ...
121-414
1.51e-04
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: 43.72 E-value: 1.51e-04
Purine ribonucleoside efflux pump NepI and similar transporters of the Major Facilitator ...
165-410
6.63e-04
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: 41.77 E-value: 6.63e-04
bacterial MdtG-like and eukaryotic solute carrier 18 (SLC18) family of the Major Facilitator ...
260-419
1.07e-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: 41.02 E-value: 1.07e-03
Macrolide efflux protein A and similar proteins of the Major Facilitator Superfamily of ...
122-413
3.81e-03
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: 39.14 E-value: 3.81e-03
Organophosphate:Pi antiporter/Solute Carrier family 37 of the Major Facilitator Superfamily of ...
260-415
8.72e-03
Organophosphate:Pi antiporter/Solute Carrier family 37 of the Major Facilitator Superfamily of transporters; Organophosphate:Pi antiporters (OPA) are integral membrane proteins responsible for the transport of specific organophosphates or sugar phosphates across biological membranes with the simultaneous translocation of inorganic phosphate into the opposite direction. The OPA family is also called solute carrier family 37 (SLC37) in vertebrates. Members include glucose-6-phosphate (Glc6P) transporter (also called translocase or exchanger), glycerol-3-phosphate permease, 2-phosphonopropionate transporter, phosphoglycerate transporter, as well as membrane sensor protein UhpC from Escherichia coli. UhpC is both a sensor and a transport protein; it recognizes external Glc6P and induces transport by UhpT, and it can also transport Glc6P. Vertebrates contain four SLC37 or sugar-phosphate exchange (SPX) proteins: SLC37A1 (SPX1), SLC37A2 (SPX2), SLC37A3 (SPX3), and SLC37AA4 (SPX4). The OPA/SLC37 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: 340870 [Multi-domain] Cd Length: 364 Bit Score: 38.02 E-value: 8.72e-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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