title: First crystal structures of Na+,K+-ATPase: new light on the oldest ion pump.
abstract: Na(+),K(+)-adenosine triphosphatase (NKA) is the first P-type ion translocating adenosine triphosphatase (ATPase) ever identified, and the significance of this class of proteins was highlighted by the 1997 Nobel Prize in Chemistry awarded to Jens C. Skou for the discovery in 1957. More than half a century passed between the initial identification and the publication of a high-resolution crystal structure of NKA. Although the new crystal structures provided many surprises and insights, structural biology on this system remains challenging, as NKA is a very difficult protein to crystallize. Here we explain the reasons behind the challenges, introduce a mechanism that governs the function, and summarize current knowledge of NKA structure in comparison with another member of the P-type ATPase family, Ca(2+)-ATPase.
authors.affiliation: Institute of Molecular and Cellular Biosciences, The University of Tokyo, Tokyo 113-0032, Japan.
authors.forename: Chikashi
authors.initials: C
authors.lastname: Toyoshima
authors.forename: Ryuta
authors.initials: R
authors.lastname: Kanai
authors.forename: Flemming
authors.initials: F
authors.lastname: Cornelius
mesh_terms: D000818:Animals; D001665:Binding Sites; D018360:Crystallography, X-Ray; D006801:Humans; D016623:Ion Pumps / Q000737:chemistry; D008958:Models, Molecular; D011487:Protein Conformation; D000254:Sodium-Potassium-Exchanging ATPase / Q000737:chemistry* / Q000378:metabolism
chemical_list: D016623:Ion Pumps; D000254:Sodium-Potassium-Exchanging ATPase