• Nanion Technologies: イオンチャネル研究のスマートツール

    Nanion Technologies: イオンチャネル研究のスマートツール

  • SyncroPatch 384i: HTS Automated Patch Clamp

    SyncroPatch 384i: HTS Automated Patch Clamp

  • SURFE²R 96SE: ラベルフリーのトランスポーターHTS

    SURFE²R 96SE: ラベルフリーのトランスポーターHTS

  • Dynamic Clamp: Patchliner

    Dynamic Clamp: Patchliner

  • 脂質二分子膜実験: Orbitシリーズ

    脂質二分子膜実験: Orbitシリーズ

  • CardioExcyte 96 SOL: 心筋の光ペーシング

    CardioExcyte 96 SOL: 心筋の光ペーシング

Our Product Portfolio

SyncroPatch 384

SyncroPatch 384

Patchliner

Patchliner

Port-a-Patch

Port-a-Patch

Port-a-Patch mini

Port-a-Patch mini

CardioExcyte 96

CardioExcyte 96

FLEXcyte 96

FLEXcyte 96

SURFE²R 96SE

SURFE²R 96SE

SURFE²R N1

SURFE²R N1

Orbit 16 TC

Orbit 16 TC

Orbit Mini

Orbit Mini

Vesicle Prep Pro

Vesicle Prep Pro

2011 - G117C MelB, a mutant melibiose permease with a changed conformational equilibrium

Icon N1  SURFE²R-technology (custom-built system) publication in Biochimica et Biophysica Acta (BBA) - Biomembranes (2011)

Authors:
Ganea C., Meyer-Lipp K., Lemonnier R., Krah A., Leblanc G., Fendler K.

Journal:
Biochimica et Biophysica Acta (BBA) - Biomembranes (2011) 1808(10):2508-2516


Highlights:

  • Steady-state kinetics of G117C MelB like wild type.
  • Pre steady-state kinetics altered in G117C MelB.
  • Initial configuration of G117C MelB differs from wild type.
  • Rapid dynamic equilibrium of substrate free transporter.

Abstract:

Replacement of the glycine at position 117 by a cysteine in the melibiose permease creates an interesting phenotype: while the mutant transporter shows still transport activity comparable to the wild type its pre steady-state kinetic properties are drastically altered. The transient charge displacements after substrate concentration jumps are strongly reduced and the fluorescence changes disappear. Together with its maintained transport activity this indicates that substrate translocation in G117C melibiose permease is not impaired but that the initial conformation of the mutant transporter differs from that of the wild type permease. A kinetic model for the G117C melibiose permease based on a rapid dynamic equilibrium of the substrate free transporter is proposed. Implications of the kinetic model for the transport mechanism of the wild type permease are discussed.


Download here

Back

We use cookies on our website. Some of them are essential for the operation of the site, while others help us to improve this site and the user experience (tracking cookies). You can decide for yourself whether you want to allow cookies or not. Please note that if you reject them, you may not be able to use all the functionalities of the site.