P-type ATPase, cytoplasmic domain N QuickView

Description:: P-ATPases (also known as E1-E2 ATPases) are found in bacteria and in a number of eukaryotic plasma membranes and organelles. P-ATPases function to transport a variety of different compounds, including ions and phospholipids, across a membrane using ATP hydrolysis for energy. There are many different classes of P-ATPases, which transport specific types of ion: H+, Na+, K+, Mg2+, Ca2+, Ag+ and Ag2+, Zn2+, Co2+, Pb2+, Ni2+, Cd2+, Cu+ and Cu2+. P-ATPases can be composed of one or two polypeptides, and can usually assume two main conformations called E1 and E2.This superfamily represents the cytoplasmic domain N found in P-type ATPases. The cytoplasmic loops of the P-type ATPases form three separate modules, commonlynamed the A, P and N-domains. The N-domain comprises the nucleotide binding site. This domain forms a seven-stranded antiparallel beta-sheet with two additional beta-strands forming a hairpin and five alpha-helices.