This domain has SUMO (small ubiquitin-like modifier) ligase activity and is involved in DNA repair and chromosome organisation [2][3].

1: Miz1, a novel zinc finger transcription factor that interacts with Msx2 and enhances its affinity for DNA. Wu L, Wu H, Ma L, Sangiorgi F, Wu N, Bell JR, Lyons GE, Maxson R; Mech Dev 1997;65:3-17. PMID:9256341

2: From The Cover: A SUMO ligase is part of a nuclear multiprotein complex that affects DNA repair and chromosomal organization. Zhao X, Blobel G; Proc Natl Acad Sci U S A 2005;102:4777-4782. PMID:15738391

3: SUMO modifications control assembly of synaptonemal complex and polycomplex in meiosis of Saccharomyces cerevisiae. Cheng CH, Lo YH, Liang SS, Ti SC, Lin FM, Yeh CH, Huang HY, Wang TF; Genes Dev. 2006;20:2067-2081. PMID:16847351