Atpase, Na+/K+ Transporting Alpha 1 Polypeptide (ATP1a1) Antibody – Mouse Monoclonal

The protein encoded by this gene belongs to the family of P-type cation transport ATPases, and to the subfamily of Na+/K+ -ATPases. Na+/K+ -ATPase is an integral membrane protein responsible for establishing and maintaining the electrochemical gradients of Na and K ions across the plasma membrane. These gradients are essential for osmoregulation, for sodium-coupled transport of a variety of organic and inorganic molecules, and for electrical excitability of nerve and muscle. This enzyme is composed of two subunits, a large catalytic subunit (alpha) and a smaller glycoprotein subunit (beta). The catalytic subunit of Na+/K+ -ATPase is encoded by multiple genes. This gene encodes an alpha 1 subunit. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2009]

ATP1A1: the catalytic component of the active enzyme, which catalyzes the hydrolysis of ATP coupled with the exchange of Na and K ions across the plasma membrane. This action creates the electrochemical gradient of Na and K, providing the energy for active transport of various nutrients. Two splice-variant isoforms have been described.

Protein type: Membrane protein, integral; Transporter, ion channel; EC 3.6.3.9; Membrane protein, multi-pass; Hydrolase; Transporter

Chromosomal Location of Human Ortholog: 1p21

Cellular Component: Golgi apparatus; protein complex; basolateral plasma membrane; endoplasmic reticulum; T-tubule; integral to membrane; caveola; membrane; apical plasma membrane; plasma membrane; melanosome; sodium:potassium-exchanging ATPase complex; sarcolemma; endosome; vesicle

Molecular Function: potassium ion binding; protein domain specific binding; protein binding; sodium ion binding; chaperone binding; phosphoric monoester hydrolase activity; sodium:potassium-exchanging ATPase activity; phosphoinositide 3-kinase binding; ankyrin binding; ADP binding; protein kinase binding; ATP binding

Biological Process: response to drug; cellular sodium ion homeostasis; negative regulation of heart contraction; membrane hyperpolarization; positive regulation of striated muscle contraction; regulation of sodium ion transport; cellular potassium ion homeostasis; negative regulation of glucocorticoid biosynthetic process; dephosphorylation; potassium ion import; regulation of blood pressure; positive regulation of heart contraction; transmembrane transport; regulation of the force of heart contraction; cardiac muscle contraction