Anamorsin, subsequently named CIAPIN1 for cytokine-induced anti-apoptosis inhibitor 1, in humans is the homologue of yeast Dre2, a conserved soluble eukaryotic Fe-S cluster protein, that functions in cytosolic Fe-S protein biogenesis. It is found in both the cytoplasm and in the mitochondrial intermembrane space (IMS) [1]. CIAPIN1 is found to be up-regulated in hepatocellular cancer, is considered to be a downstream effector of the receptor tyrosine kinase-Ras signalling pathway, and is essential in mouse definitive haematopoiesis [2]. Dre2 has been found to interact with the yeast reductase Tah18, forming a tight cytosolic complex implicated in the response to high levels of oxidative stress [3]. These proteins consist of two domains, the N-terminal well-folded one, with a S-adenosylmethionine methyltransferase-like fold and the C-terminal more flexible domain, represented in this entry, which contains two highly conserved cysteine rich motifs that bind Fe-S clusters [4,5].

1: Dre2, a conserved eukaryotic Fe/S cluster protein, functions in cytosolic Fe/S protein biogenesis. Zhang Y, Lyver ER, Nakamaru-Ogiso E, Yoon H, Amutha B, Lee DW, Bi E, Ohnishi T, Daldal F, Pain D, Dancis A; Mol Cell Biol. 2008;28:5569-5582. PMID:18625724

2: Adenovirus-delivered CIAPIN1 small interfering RNA inhibits HCC growth in vitro and in vivo. Li X, Pan Y, Fan R, Jin H, Han S, Liu J, Wu K, Fan D; Carcinogenesis. 2008;29:1587-1593. PMID:18299278

3: A newly identified essential complex, Dre2-Tah18, controls mitochondria integrity and cell death after oxidative stress in yeast. Vernis L, Facca C, Delagoutte E, Soler N, Chanet R, Guiard B, Faye G, Baldacci G; PLoS One. 2009;4:e4376. PMID:19194512

4: Molecular view of an electron transfer process essential for iron-sulfur protein biogenesis. Banci L, Bertini I, Calderone V, Ciofi-Baffoni S, Giachetti A, Jaiswal D, Mikolajczyk M, Piccioli M, Winkelmann J; Proc Natl Acad Sci U S A. 2013;110:7136-7141. PMID:23596212

5: Anamorsin is a [2Fe-2S] cluster-containing substrate of the Mia40-dependent mitochondrial protein trapping machinery. Banci L, Bertini I, Ciofi-Baffoni S, Boscaro F, Chatzi A, Mikolajczyk M, Tokatlidis K, Winkelmann J; Chem Biol. 2011;18:794-804. PMID:21700214