| Modification Notes |
TIMAP (protein phosphatase 1 regulatory inhibitor subunit), protein phosphatase 1 regulatory inhibitor subunit 16B, TGF-beta-inhibited membrane-associated protein, CAAX box protein TIMAP, ankyrin repeat domain-containing protein 4, ANKRD4, PPP1R16B or KIAA0823, is a novel 567 amino acid CAAX box protein that is a positive regulator of pulmonary endothelial barrier function and likely acts as a downstream target in endothelial cells for the TGF∫1 signaling cascade. TIMAP localizes to the cell membrane and is highly expressed in CNS, lung, vascular endothelium, spleen, kidney and testis. TIMAP contains five ANK repeats, a protein phosphatase-1-interacting domain, and a carboxy-terminal CAAX box domain. TIMAP is inhibited by TGF∫1, and potentially serves a signaling function through interaction with protein phosphatase-1. The gene encoding TIMAP maps to human chromosome 20q11.23. |