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The mammalian SWI/SNF (mSWI/SNF) complex functions as a tumor suppressor in many human malignant cancers. [13] Early studies identified that SWI/SNF subunits were frequently absent in cancer cell lines. [14] SWI/SNF was first identified in 1998 as a tumor suppressor in rhabdoid tumors, a rare pediatric malignant cancer. [15]
However, the chromatin remodeling activities of ISWI and SWI/SNF are distinct and mediate the binding of non-overlapping sets of DNA transcription factors. [ 3 ] The protein ISW1 is the first ATPase subunit which has been isolated in the ISWI chromatin remodeling family in the fruit fly Drosophila .
Susceptibility weighted imaging (SWI), originally called BOLD venographic imaging, is an MRI sequence that is exquisitely sensitive to venous blood, hemorrhage and iron storage. SWI uses a fully flow compensated, long echo, gradient recalled echo (GRE) pulse sequence to acquire images.
The protein encoded by this gene is a member of the SWI/SNF family of proteins and is similar to the brahma protein of Drosophila. Members of this family have helicase and ATPase activities and are thought to regulate transcription of certain genes by altering the chromatin structure around those genes.
There are four subfamilies of chromatin remodelers: SWI/SNF, INO80, ISW1, and CHD. [2] The RSC complex is a 15-subunit chromatin remodeling complex initially found in Saccharomyces cerevisiae, and is homologous to the SWI/SNF complex found in humans. [1] The RSC complex has ATPase activity in the presence of DNA. [1]
ARID1B is a component of the human SWI/SNF chromatin remodeling complex. ... Human ARID1B genome location and ARID1B gene details page in the UCSC Genome Browser
SWI/SNF-related matrix-associated actin-dependent regulator of chromatin subfamily B member 1 is a protein that in humans is encoded by the SMARCB1 gene. [ 5 ] [ 6 ] [ 7 ] Function
Gene encoding for ARID1A is the most frequently mutated SWI/SNF subunit across cancers. [9] This gene has been commonly found mutated in different cancers leading to loss of function, including gastric cancers, [10] colon cancer, [11] ovarian clear cell carcinoma, [12] liver cancer, [13] lymphoma [14] and pancreatic cancer. [15]