In today's world, Sodium/phosphate cotransporter is a relevant topic that generates great interest and debate among different sectors of society. With the advancement of technology and globalization, Sodium/phosphate cotransporter has acquired significant importance in our lives, impacting various aspects, from the way we relate to others, to the way we manage our resources. In this article, we will explore in depth the different approaches and perspectives on Sodium/phosphate cotransporter, analyzing its relevance in the current context and its possible evolution in the future. In addition, we will examine how Sodium/phosphate cotransporter has influenced decision-making at the individual and collective level, as well as the configuration of public policies and business strategies.
The sodium/phosphate cotransporter is a member of the phosphate:Na+ symporter (PNaS) family within the TOG Superfamily of transport proteins as specified in the Transporter Classification Database (TCDB).
Sodium/phosphate cotransporters are also known as:
The Phosphate:Na+ Symporter (PNaS) family (TC# 2.A.58) includes several closely related, functionally characterized, sodium-dependent, inorganic phosphate (Pi) transporter (NPT) proteins from mammals. Other organisms that possess PNaS family members include many in eukaryotic, bacterial and archaeal phyla. Bacterial sodium:phosphate symporters, NptA of Vibrio cholerae (TC#2.A.58.1.2) and YjbB of E. coli (TC# 2.A.58.2.1) have been functionally characterized.
The well-characterized mammalian proteins are found in renal (IIa isoform) and intestinal (IIb isoform) brush border membranes and are about 640 amino acyl residues long with 8-12 putative TMSs. The N- and C-termini both reside in the cytoplasm, and a large hydrophilic loop is localized between trans-membrane segments (TMSs) 3 and 4. While IIa isoforms are pH-dependent, IIb isoforms are pH-independent. The IIa sodium phosphate symporter isoform is a functional monomer, but it interacts with PDZ proteins which probably mediate apical sorting, parathyroid hormone-controlled endocytosis and/or lysosomal sorting of internalized transporters.
The transport reaction catalyzed by the mammalian proteins is:
There are several known sodium-dependent phosphate transporters found in humans. For example, the protein 2A is encoded by the solute carrier family 34, member 1 (SLC34A1) gene and facilitates uptake of phosphate for normal cellular functions including cellular metabolism, signal transduction, and nucleic acid and lipid synthesis. The PNaS family is also called the SLC34 family.
Other known sodium-dependent phosphate transporters found in humans include (but are not limited to):
Due to the Actinopterygian whole genome duplication event, slc34a1 and slc34a2 are present in a duplicated form in many teleost fish - slc34a1a and slc34a1b, slc34a2a and slc34a2b. This is not uniform and slc341b is frequently lost in some Actinopterygian lineages. slc34a3-type genes are not present.
Lifastuzumab vedotin is a monoclonal antibody for the sodium/phosphate cotransporter that is under development for the treatment of cancer.