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Structural characterization of interactions between subunits of the GBAF chromatin remodeling complex
Naušová, Karolína ; Veverka, Václav (advisor) ; Rozbeský, Daniel (referee)
Epigenetics investigates heritable phenotypic changes that are not caused by alterations in DNA sequence. One of the major epigenetic tools is chromatin remodeling mediated by ATP-dependent chromatin remodeling complexes, which fundamentally affect gene expression and thus cellular fate. A mammalian variant of the ATP-dependent chromatin remodeling SWI/SNF complex is the BAF complex, which is involved in both activation and repression of gene expression. There have been identified three major variants of BAF complex one of which is non-canonical BAF, also known as GLTSCR1 containing BAF, GBAF. Each complex consists of up to 15 subunits, some of which are specific only to one of the complex variants. Mutations in genes coding subunits of BAF lead to several genetic disorders or to the cancer development. The GBAF complex contains specific subunits, BRD9 (Bromodomain containing protein 9), GLTSCR1 (Glioma tumor suppressor candidate region 1) and GLTSCR1L (GLTSCR1-like), which are essential for its formation. Although the exact function of the GBAF complex has not been elucidated yet, it is often associated with synovial sarcoma and rhabdoid tumors. Two of the three complexes are impaired in those tumors and gene expression is maintained only due to the GBAF complex. If GBAF would additionally loose...
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