Heteromeric K+channels in plants

Heteromeric Amino Acid Transporters

• The heavy subunits (molecular mass of ~90 and ~80 kDa for rBAT and 4F2hc, respectively) are type II membrane N-glycoproteins with a single transmembrane domain, an intracellular NH2 terminus, and an extracellular COOH terminus significantly homologous to insect and bacterial glucosidases (FIGURE 1). Recently, X-ray diffraction of the extracellular domain of human 4F2hc revealed a three-dimens...

Heteromeric Complexes of Native Collectin

Heteromeric connexons in lens gap junction channels.

Gap junction channels are formed by paired oligomeric membrane hemichannels called connexons, which are composed of proteins of the connexin family. Experiments with transfected cell lines and paired Xenopus oocytes have demonstrated that heterotypic intercellular channels which are formed by two connexons, each composed of a different connexin, can selectively occur. Studies by Stauffer [Stauf...

Heteromeric AtKC1 AKT1 Channels in Arabidopsis Roots

Dietmar Geiger, Dirk Becker, Daniel Vosloh, Franco Gambale, Klaus Palme, Marion Rehers , Uta Anschuetz, Ingo Dreyer**, Jörg Kudla , and Rainer Hedrich From the Julius-von-Sachs-Institute, Molecular Plant Physiology and Biophysics, University of Wuerzburg, Julius-von-Sachs-Platz 2, D-97082 Wuerzburg, Germany, the Istituto di Biofisica, Consiglio Nazionale delle Ricerche, Via de Marini 6, I 16149...

Heteromeric assembly of P2X subunits

Transcripts and/or proteins of P2X receptor (P2XR) subunits have been found in virtually all mammalian tissues. Generally more than one of the seven known P2X subunits have been identified in a given cell type. Six of the seven cloned P2X subunits can efficiently form functional homotrimeric ion channels in recombinant expression systems. This is in contrast to other ligand-gated ion channel fa...