WICH complex

An ISWI complex that contains an ATPase subunit of the ISWI family (specifically SNF2H in mammals, which contain two ISWI homologs) and WSTF (Williams Syndrome Transcription Factor). WICH plays roles in regulation of RNAP I and III transcription and in DNA replication and repair.

secretory IgA immunoglobulin complex

A polymeric IgA immunoglobulin complex that is complexed with one chain of secretory component (SC). Polymeric IgA is present in mucosal areas, having been transported via a transcytosis mechanism in mucosal epithelial cells relying on the polymeric Ig receptor, a portion of which then remains bound to the polymeric IgA as secretory component.

obsolete WINAC complex

OBSOLETE. A SWI/SNF-type complex that directly interacts with the vitamin D receptor (VDR) through the Williams syndrome transcription factor (WSTF), and mediates the recruitment of unliganded VDR to VDR target sites in promoters. The WINAC complex contains at least 13 subunits, including WSTF, several SWI/SNF components, and DNA replication-related factors.

immunoglobulin transcytosis in epithelial cells mediated by polymeric immunoglobulin receptor

The process of transporting polymeric IgA and polymeric IgM immunoglobulin, via transcytosis mediated by the polymeric immunoglobulin receptor (pIgR), from the basolateral surface to apical surface of an epithelial cell. At the apical surface the immunoglobulin binding portion of the pIgRis cleaved and remains bound to the transported immunoglobulin as secretory component (SC). The same process is used for the transport and excretion of IgA immune complexes to the luminal surface of the mucosa.