Original Article
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World J Biol Chem. May 26, 2014; 5(2): 240-253
Published online May 26, 2014. doi: 10.4331/wjbc.v5.i2.240
Functional analysis of human Na+/K+-ATPase familial or sporadic hemiplegic migraine mutations expressed in Xenopus oocytes
Susan Spiller, Thomas Friedrich
Susan Spiller, Thomas Friedrich, Institute of Chemistry, Technical University of Berlin, D-10623 Berlin, Germany
Author contributions: Spiller S performed research; Spiller S and Friedrich T designed research, analyzed the data and wrote the manuscript.
Supported by German Research Foundation (Cluster of Excellence “Unifying Concepts in Catalysis”)
Correspondence to: Thomas Friedrich, Professor, Institute of Chemistry, Technical University of Berlin, Sekr. PC-14, Straβe des 17. Juni 135, D-10623 Berlin, Germany. friedrich@chem.tu-berlin.de
Telephone: +49-30-31424128 Fax: +49-30-31478600
Received: December 28, 2013
Revised: March 13, 2014
Accepted: April 11, 2014
Published online: May 26, 2014
Processing time: 194 Days and 15.3 Hours
Core Tip

Core tip: Mutations of the human ATP1A2 gene, which encodes the Na+/K+-ATPase α2-subunit, are associated with familial hemiplegic migraine (FHM2) that is inherited in an autosomal dominant fashion. We studied seven ATP1A2 mutations related to FHM2 or sporadic hemiplegic migraine by electrophysiological and biochemical methods to characterize functional impairments. The mutations G855R, G900R, E902K, L994del, D999H, K1003E and Y1009X were selected according to their structural importance: in putative interaction sites between α- and β-subunit and in the α-subunit’s C-terminal region. Some of these mutations showed a severe loss of function, and we discuss the functional and physiological consequences in order to better understand the molecular basis for neurological impairments.