| Primary Identifier | IPR028941 | Type | Domain |
| Short Name | WHIM2_dom |
| description | This entry represents the WHIM2 domain found in diverse eukaryotic chromatin proteins, such as animal BAZ/WAL and BPTF proteins, plant RLT, and yeast Itc1. This domain contains the D-TOX E motif (also known as the Williams-Beuren syndrome DDT (WSD) motif) that is conserved from yeasts to animals [, , ].WHIM2 domain is a conserved alpha helical motif that along with the WHIM1 and WHIM3 motifs, and the DDT domain comprise an alpha helical module found in diverse eukaryotic chromatin proteins []. Based on the Ioc3 structure, this module is inferred to interact with nucleosomal linker DNA and the SLIDE domain of ISWI proteins [, ]. The resulting complex forms a protein ruler that measures out the spacing between two adjacent nucleosomes []. The acidic residue from the GxD signature of WHIM2 is a major determinant of the interaction between the ISWI and WHIM motifs. The N-terminal portion of the WHIM2 motif also contacts the inter-nucleosomal linker DNA. The module shows a great domain architectural diversity and is often combined with other modified histone peptide recognizing and DNA binding domains, some of which discriminate methylated DNA []. |
