Protein
Vacuolar cation/proton exchanger 4
Organism
Arabidopsis thaliana
Function
Vacuolar cation/proton exchanger (CAX). Translocates Ca(2+) and other metal ions into vacuoles using the proton gradient formed by H(+)-ATPase and H(+)-pyrophosphatase. Cation selectivity transport in tobacco root tonoplast vesicles is Cd(2+)>Zn(2+)>>Ca(2+)>>>Mn(2+).
Similarity
Belongs to the Ca(2+):cation antiporter (CaCA) (TC 2.A.19) family. Cation/proton exchanger (CAX) subfamily.
Sequence
MSSISTESSSNLSLLENGGGGSDKPTAETSRRVRRTVSASSLIRKRSDLKLISRVRWEFMRRILTNLQEVLLGTKLFILFPAVPLAVVAHRYDCPRAWVFALSLLGLTPLAERISFLTEQIAFHTGPTVGGLMNATCGNATEMIIAILAVGQRKMRIVKLSLLGSILSNLLFVLGTSLFLGGISNLRKHQSFDPRQGDMNSMLLYLALLCQTLPMIMRFTMEAEEYDGSDVVVLSRASSFVMLIAYLAFLIFHLFSSHLSPPPPPLPQREDVHDDDVSDKEEEGAVIGMWSAIFWLIIMTLLVALLSDYLVSTIQDAADSWGLSVGFIGIILLPIVGNAAEHAGAVIFAFRNKLDITLGIALGSATQIALFVVPVTVLVAWTMGIEMDLNFNLLETACFALSILVTSLVLQDGTSNYMKGLVLLLCYVVIAACFFVSNSPSSKLLF