Format

Send to

Choose Destination
See comment in PubMed Commons below
Exp Cell Res. 2008 Nov 15;314(19):3551-62. doi: 10.1016/j.yexcr.2008.09.006. Epub 2008 Sep 20.

The proto-oncoprotein SYT (SS18) controls ATP release and regulates cyst formation by polarized MDCK cells.

Author information

1
Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.

Abstract

The SYT proto-oncoprotein (also known as SS18) is a gene expression regulator conserved across species. Although its biological function is still unknown, the importance of SYT as a housekeeping protein is illustrated by the lethal phenotype of SYT-null embryos. Notably, SYT is a component of the synovial sarcoma-associated translocation product, the SYT-SSX oncogene. SYT was previously reported as a mediator of cell adhesion. In the present study we show that SYT possesses distinct domains that control MDCK cyst formation in three-dimensional collagen cultures. While the carboxy-half of SYT, the QPGY domain, is required for cyst growth, the amino-terminal region appears to exert on this process a regulatory effect. Further analysis suggested that the purinergic G protein-coupled P2Y receptor signaling is involved in SYT-induced cystogenesis. Activation of this cascade is due to facilitation of ATP release in the extracellular space of polarized MDCK cells by SYT. These studies allow us to begin to understand the vital role of SYT in controlling epithelial morphogenesis and might explain the lethality of its loss in the developing embryo.

PMID:
18835266
PMCID:
PMC2631564
DOI:
10.1016/j.yexcr.2008.09.006
[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science Icon for PubMed Central
    Loading ...
    Support Center