FKBP52 is expressed ubiquitously in the nervous system in zebrafish. (A) Sequence alignment of Danio rerio (Z) and human (H) FKBP52. D. rerio FKBP52 amino acid sequence shares 62% of identities (amino acids in red) and 83% of homologies with the human ortholog. Based on the 3D structure of human FKBP52 (1), four domains are delineated. The single underlining indicates peptidyl-prolyl isomerase (PPIase) and FK506-binding domain, the double underlining indicates PPIase-like domain, the thick underlining indicates tetratricopetide repeat domain, and the dashed underlining indicates calmodulin binding domain. (B) RT-PCR shows the expression of FKBP52 during development. NCtrl, negative control. (C) Whole-mount FKBP52 in situ hybridization shows its maternal ubiquitous expression [1.25 h postfertilization (hpf)] that persists until 32 hpf. (Scale bars: 200 µm.)
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