This domain is frequently found at the N-terminus of proteins containing Pfam:PF08458 at the C-terminus. It is a component of the auto-regulatory loop which enables auxin canalisation by recruitment of the PIN1 auxin efflux protein to the cell membrane [1].

1: FORKED1 encodes a PH domain protein that is required for PIN1 localization in developing leaf veins. Hou H, Erickson J, Meservy J, Schultz EA; Plant J. 2010;63:960-973. PMID:20626652