NCBI Accession #
NP_001190377.1
NCBI GenBank Nucleotide #
NM_001203448.2
NCBI Official Full Name
Calcium-binding EF-hand family protein
NCBI Official Symbol
SOS3
NCBI Official Synonym Symbols
ATSOS3; CALCINEURIN B-LIKE PROTEIN 4; CBL4; MOP9.19; MOP9_19; SALT OVERLY SENSITIVE 3
NCBI Protein Information
Calcium-binding EF-hand family protein
NCBI Summary
encodes a calcium sensor that is essential for K+ nutrition, K+/Na+ selectivity, and salt tolerance. The protein is similar to calcineurin B. Lines carrying recessive mutations are hypersensitive to Na+ and Li+ stresses and is unable to grow in low K+. The growth defect is rescued by extracellular calcium.
UniProt Synonym Gene Names
SOS3
UniProt Protein Name
Calcineurin B-like protein 4
UniProt Synonym Protein Names
Protein SALT OVERLY SENSITIVE 3
UniProt Primary Accession #
O81223
UniProt Related Accession #
O81223
UniProt Comments
Acts as a calcium sensor involved in the regulatory pathway for the control of intracellular Na+ and K+ homeostasis and salt tolerance. Binding of a CBL protein to the regulatory NAF domain of a CIPK serine-threonine protein kinase lead to the activation of the kinase in a calcium-dependent manner. Operates in synergy with CIPK24/SOS2 to activate the plasma membrane Na+/H+ antiporter SOS1. Involved in salt stress responses by mediating calcium-dependent microfilament reorganization. The CBL4/CIPK6 complex mediates translocation of AKT2 from the endoplasmic reticulum to the plasma membrane. Both myristoylation and S-acylation are required for AKT2 activation.