4lbe

From Proteopedia

proteopedia linkproteopedia link

Template:STRUCTURE 4lbe

Contents 1 Structure of KcsA with R122A mutation 2 Function 3 About this Structure 4 Reference

Structure of KcsA with R122A mutation

Function

[KCSA_STRLI] Acts as a pH-gated potassium ion channel; changing the cytosolic pH from 7 to 4 opens the channel, although it is not clear if this is the physiological stimulus for channel opening. Monovalent cation preference is K(+) > Rb(+) > NH4(+) >> Na(+) > Li(+).^[1]

About this Structure

4lbe is a 3 chain structure with sequence from Streptomyces lividans. Full crystallographic information is available from OCA.

Reference

1. ↑ Schrempf H, Schmidt O, Kummerlen R, Hinnah S, Muller D, Betzler M, Steinkamp T, Wagner R. A prokaryotic potassium ion channel with two predicted transmembrane segments from Streptomyces lividans. EMBO J. 1995 Nov 1;14(21):5170-8. PMID:7489706