This family includes Nse4 and EID3 members [1], that bind over this region to the Nse3 pocket, in MAGE family Pfam:PF01454 [2].

1: Analysis of the Nse3/MAGE-binding domain of the Nse4/EID family proteins. Guerineau M, Kriz Z, Kozakova L, Bednarova K, Janos P, Palecek J; PLoS One. 2012;7:e35813. PMID:22536443

2: Interactions between the Nse3 and Nse4 components of the SMC5-6 complex identify evolutionarily conserved interactions between MAGE and EID Families. Hudson JJ, Bednarova K, Kozakova L, Liao C, Guerineau M, Colnaghi R, Vidot S, Marek J, Bathula SR, Lehmann AR, Palecek J; PLoS One. 2011;6:e17270. PMID:21364888