This entry represents the N-terminal domain of PSI proteins from Arabidopsis. This domain is found associated with Pfam:PF05003. PSI1 was identified as a gene that is co-expressed with the phytosulfokine (PSK) receptor genes PSKR1 and PSKR2 in Arabidopsis thaliana. PSI proteins are plant-specific and promote growth [1].

1: The PSI family of nuclear proteins is required for growth in arabidopsis. Stuhrwohldt N, Hartmann J, Dahlke RI, Oecking C, Sauter M; Plant Mol Biol. 2014;86:289-302. PMID:25062973