TSPO protein in Arabidopsis (AtTSPO) is a translocator protein 18 kDa that is encoded by a single intronless locus.
It has been shown that AtTSPO is induced by abiotic stresses and plant stress hormone abscisic acid.
In this review, we summarize the expression pattern, sub-cellular localization, interacting proteins, and biological functions.
In addition, we discuss the future directions of study on AtTSPO.