INO80 Complex Subunit B (INO80B)

In Saccharomyces cerevisiae, orthologs of Tip49a and Tip49b, called Rvb1 and Rvb2, respectively, are subunits of two distinct ATP-dependent chromatin remodeling complexes, SWR1 and INO80. The mammalian Tip49a and Tip49b proteins are integral subunits of a chromatin remodeling complex bearing striking similarities to the S. cerevisiae SWR1 complex.A new mammalian Tip49a- and Tip49b-containing ATP-dependent chromatin remodeling complex, which includes orthologs of 8 of the 15 subunits of the S. cerevisiae INO80 chromatin remodeling complex as well as at least five additional subunits unique to the human INO80 (hINO80) complex. Finally, similar to the yeast INO80 complex, the hINO80 complex exhibits DNA- and nucleosome-activated ATPase activity and catalyzes ATP-dependent nucleosome sliding.