| Structural highlights
Function
CIA2A_HUMAN Component of the cytosolic iron-sulfur protein assembly (CIA) complex, a multiprotein complex that mediates the incorporation of iron-sulfur cluster into extramitochondrial Fe/S proteins (PubMed:23891004). As a CIA complex component and in collaboration with CIAO1 specifically matures ACO1 and stabilizes IREB2, connecting cytosolic iron-sulfur protein maturation with cellular iron regulation (PubMed:23891004). May play a role in chromosome segregation through establishment of sister chromatid cohesion. May induce apoptosis in collaboration with APAF1 (PubMed:25716227).[1] [2]
Publication Abstract from PubMed
Fam96a mRNA, which encodes a mammalian DUF59 protein, is enriched in macrophages. Recombinant human Fam96a forms stable monomers and dimers in solution. Crystal structures of these two forms revealed that each adopts a distinct type of domain-swapped dimer, one of which is stabilized by zinc binding. Two hinge loops control Fam96a domain swapping; both are flexible and highly conserved, suggesting that domain swapping may be a common feature of eukaryotic but not bacterial DUF59 proteins. The derived monomer fold of Fam96a diverges from that of bacterial DUF59 counterparts in that the C-terminal region of Fam96a is much longer and is positioned on the opposite side of the N-terminal core fold. The putative metal-binding site of bacterial DUF59 proteins is not conserved in Fam96a, but Fam96a interacts tightly in vitro with Ciao1, the cytosolic iron-assembly protein. Moreover, Fam96a and Ciao1 can be co-immunoprecipitated, suggesting that the interaction also occurs in vivo. Although predicted to have a signal peptide, it is shown that Fam96a is cytoplasmic. The data reveal that eukaryotic DUF59 proteins share intriguing characteristics with amyloidogenic proteins.
The mammalian DUF59 protein Fam96a forms two distinct types of domain-swapped dimer.,Chen KE, Richards AA, Ariffin JK, Ross IL, Sweet MJ, Kellie S, Kobe B, Martin JL Acta Crystallogr D Biol Crystallogr. 2012 Jun;68(Pt 6):637-48. doi:, 10.1107/S0907444912006592. Epub 2012 May 17. PMID:22683786[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Stehling O, Mascarenhas J, Vashisht AA, Sheftel AD, Niggemeyer B, Rösser R, Pierik AJ, Wohlschlegel JA, Lill R. Human CIA2A-FAM96A and CIA2B-FAM96B integrate iron homeostasis and maturation of different subsets of cytosolic-nuclear iron-sulfur proteins. Cell Metab. 2013 Aug 6;18(2):187-98. PMID:23891004 doi:10.1016/j.cmet.2013.06.015
- ↑ Schwamb B, Pick R, Fernández SB, Völp K, Heering J, Dötsch V, Bösser S, Jung J, Beinoraviciute-Kellner R, Wesely J, Zörnig I, Hammerschmidt M, Nowak M, Penzel R, Zatloukal K, Joos S, Rieker RJ, Agaimy A, Söder S, Reid-Lombardo KM, Kendrick ML, Bardsley MR, Hayashi Y, Asuzu DT, Syed SA, Ordog T, Zörnig M. FAM96A is a novel pro-apoptotic tumor suppressor in gastrointestinal stromal tumors. Int J Cancer. 2015 Sep 15;137(6):1318-29. PMID:25716227 doi:10.1002/ijc.29498
- ↑ Chen KE, Richards AA, Ariffin JK, Ross IL, Sweet MJ, Kellie S, Kobe B, Martin JL. The mammalian DUF59 protein Fam96a forms two distinct types of domain-swapped dimer. Acta Crystallogr D Biol Crystallogr. 2012 Jun;68(Pt 6):637-48. doi:, 10.1107/S0907444912006592. Epub 2012 May 17. PMID:22683786 doi:http://dx.doi.org/10.1107/S0907444912006592
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