Sina is a RING-type E3 ubiquitin ligase first identified in Drosophila, a protein essential for the determination of the R7 pathway in photoreceptor cell development [3]. Murine and human homologues of Sina have also been identified, namely Siah1 and Siah2 [1-4], and also in Arabidopsis, SINAT3 [5]. These proteins have a RING-type zinc finger at the N-terminal followed by two zinc fingers and a C-terminal TRAF-like domain (Pfam:PF03145) [1-5]. This entry represents the central C2H2 zinc finger domains.

1: Elucidation of the substrate binding site of Siah ubiquitin ligase. House CM, Hancock NC, Moller A, Cromer BA, Fedorov V, Bowtell DD, Parker MW, Polekhina G; Structure. 2006;14:695-701. PMID:16615911

2: Two high-resolution structures of the human E3 ubiquitin ligase Siah1. Rimsa V, Eadsforth TC, Hunter WN; Acta Crystallogr Sect F Struct Biol Cryst Commun. 2013;69:1339-1343. PMID:24316825

3: Characterization of human homologs of the Drosophila seven in absentia (sina) gene. Hu G, Chung YL, Glover T, Valentine V, Look AT, Fearon ER; Genomics 1997;46:103-111. PMID:9403064

4: Siah-1, SIP, and Ebi collaborate in a novel pathway for beta-catenin degradation linked to p53 responses. Matsuzawa SI, Reed JC; Mol Cell 2001;7:915-926. PMID:11389839

5: SINAT E3 Ubiquitin Ligases Mediate FREE1 and VPS23A Degradation to Modulate Abscisic Acid Signaling. Xia FN, Zeng B, Liu HS, Qi H, Xie LJ, Yu LJ, Chen QF, Li JF, Chen YQ, Jiang L, Xiao S; Plant Cell. 2020;32:3290-3310. PMID:32753431

6: The SIAH E3 ubiquitin ligases promote Wnt/beta-catenin signaling through mediating Wnt-induced Axin degradation. Ji L, Jiang B, Jiang X, Charlat O, Chen A, Mickanin C, Bauer A, Xu W, Yan X, Cong F; Genes Dev. 2017;31:904-915. PMID:28546513