This family includes diverse proteins involved in large complexes. The alignment contains one highly conserved negatively charged residue and one highly conserved positively charged residue that are probably important for the function of these proteins. The family includes the yeast nuclear export factor Sac3 Swiss:P46674, and mammalian GANP/MCM3-associated proteins, which facilitate the nuclear localisation of MCM3, a protein that associates with chromatin in the G1 phase of the cell-cycle.

1: SAC3 may link nuclear protein export to cell cycle progression. Jones AL, Quimby BB, Hood JK, Ferrigno P, Keshava PH, Silver PA, Corbett AH; Proc Natl Acad Sci U S A 2000;97:3224-3229. PMID:10716708

2: Identification of a novel MCM3-associated protein that facilitates MCM3 nuclear localization. Takei Y, Tsujimoto G; J Biol Chem 1998;273:22177-22180. PMID:9712829

3: A novel nuclear phosphoprotein, GANP, is up-regulated in centrocytes of the germinal center and associated with MCM3, a protein essential for DNA replication. Kuwahara K, Yoshida M, Kondo E, Sakata A, Watanabe Y, Abe E, Kouno Y, Tomiyasu S, Fujimura S, Tokuhisa T, Kimura H, Ezaki T, Sakaguchi N; Blood 2000;95:2321-2328. PMID:10733502