PROSITE documentation PDOC00429Sodium:solute symporter family signatures and profile
It has been shown [1,2] that integral membrane proteins that mediate the intake of a wide variety of molecules with the concomitant uptake of sodium ions (sodium symporters) can be grouped, on the basis of sequence and functional similarities into a number of distinct families. One of these families is known as the sodium:solute symporter family (SSF) and currently consists of the following proteins:
- Mammalian Na+/glucose co-transporter.
- Mammalian Na+/myo-inositol co-transporter.
- Mammalian Na+/nucleoside co-transporter.
- Mammalian Na+/neutral amino acid co-transporter.
- Mammalian Na+/iodide co-transporter.
- Mammalian Na+/multivitamin co-transporter.
- Escherichia coli Na+/proline symporter (gene putP).
- Escherichia coli Na+/pantothenate symporter (gene panF).
- Escherichia coli hypothetical protein yidK.
- Escherichia coli hypothetical protein yjcG.
- Bacillus subtilis hypothetical protein ywcA (ipa-31R).
These integral membrane proteins are predicted to comprise at least ten membrane spanning domains. As signature patterns we selected two conserved regions; the first one is located in the fourth transmembrane region and the second one in a loop between two transmembrane regions in the C-terminal part of these proteins.
Last update:December 2001 / Patterns and text revised; profile added.
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PROSITE methods (with tools and information) covered by this documentation:
1 | Authors | Reizer J. Reizer A. Saier M.H. Jr. |
Title | The Na+/pantothenate symporter (PanF) of Escherichia coli is homologous to the Na+/proline symporter (PutP) of E. coli and the Na+/glucose symporters of mammals. | |
Source | Res. Microbiol. 141:1069-1072(1990). | |
PubMed ID | 1965458 |
2 | Authors | Reizer J. Reizer A. Saier M.H. Jr. |
Title | A functional superfamily of sodium/solute symporters. | |
Source | Biochim. Biophys. Acta 1197:133-166(1994). | |
PubMed ID | 8031825 |
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