Hid1 (high-temperature-induced dauer-formation protein 1) represents proteins of approximately 800 residues long and is conserved from fungi to humans. Functionally it might be involved in vesicle secretion or be an inter-cellular signalling protein or be a novel insulin receptor. It was previously thought to contain up to seven potential transmembrane domains separated by regions of low complexity [1]. However, biochemical membrane fraction analysis demonstrate that HID-1 is a peripheral membrane protein tightly associated with the Golgi apparatus but not a transmembrane protein predicted by the bioinformatic programs. Furthermore, it contains a conserved N-terminal myristoylation site was required for HID-1 binding to the Golgi apparatus [2].

1: Isolation and characterization of high-temperature-induced Dauer formation mutants in Caenorhabditis elegans. Ailion M, Thomas JH; Genetics. 2003;165:127-144. PMID:14504222

2: HID-1 is a peripheral membrane protein primarily associated with the medial- and trans- Golgi apparatus. Wang L, Zhan Y, Song E, Yu Y, Jiu Y, Du W, Lu J, Liu P, Xu P, Xu T; Protein Cell. 2011;2:74-85. PMID:21337012