MA3-924 detects the alpha 1 sodium/potassium ATPase in human, mouse, canine, rat and avian tissues.
MA3-924 has been successfully used in immunohistochemistry, immunocytochemistry, immunofluorescence, ELISA and immunoprecipitation procedures. Immunohistochemical staining of sodium/potassium ATPase in rat liver with MA3-924 yields a pattern consistent with plasma membrane localization. Immunoprecipitation of sodium/potassium ATPase from canine kidney extracts can be used for affinity purification of the alpha subunit. MA3-924 can also be utilized to inhibit activity of the enzyme.
The MA3-924 antigen is purified rat kidney sodium/potassium ATPase. This antibody recognizes an epitope within an intracellular region at or near Asp-369 of the sodium/potassium ATPase alpha subunit.
The sodium/potassium ATPase is an integral membrane enzyme found in all cells of higher organisms and is responsible for the ATP-dependent transport of sodium and potassium across the cell membrane. This membrane-bound enzyme is related to a number of other ATPases including sarcoplasmic and endoplasmic reticulum calcium ATPase (SERCA) and plasma membrane calcium ATPase (PMCA). The sodium/potassium ATPase consists of a large, multipass, transmembrane catalytic subunit, termed the alpha subunit, and an associated smaller glycoprotein, termed the beta subunit. Studies indicate that there are three isoforms of the alpha subunit (alpha 1, alpha 2, alpha 3) and two isoforms of the beta subunit (beta 1 and beta 2) encoded by two multigene families.
The different isoforms of the sodium/potassium ATPase exhibit tissue-specific and developmental patterns of expression. The alpha 1 and beta mRNAs are present in all cell types examined, whereas the alpha 2 and alpha 3 mRNAs exhibit a more restricted pattern of cell-specific expression. The alpha subunit has been found in kidney, brain, heart, and to a lesser extent liver, skeletal and smooth muscle.
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Protein Aliases: (Na+ + K+)-ATPase; ATPase, Na+/K+ transporting, alpha 1 polypeptide; ATPase, Na+K+ transporting, alpha 1; Na(+)/K(+) ATPase alpha-1 subunit; Na+/K+ ATPase; Na+/K+ ATPase 1; Na, K-ATPase, alpha-A catalytic polypeptide; Na,K-ATPase alpha-1 subunit; Na,K-ATPase catalytic subunit alpha-A protein; Sodium pump subunit alpha-1; sodium-potassium ATPase catalytic subunit alpha-1; sodium-potassium-ATPase, alpha 1 polypeptide; Sodium/potassium-transporting ATPase subunit alpha-1
Gene Aliases: ATP1A1; Atpa-1; BC010319; Nkaa1b