G2 and S phase-expressed protein 1 (GTSE1) may be involved in p53-induced cell cycle arrest in G2/M phase by interfering with microtubule rearrangements that are required to enter mitosis []. When overexpressed, GTSE1 delays G2/M phase progression [].
This is a family of phosphoproteins which includes proline/serine-rich coiled-coil protein 1 (PSRC1, also known as DDA3) and G2 and S phase-expressed protein 1 (GTSE1).DDA3 is a microtubule-destabilising protein that controls spindle dynamics and mitotic progression by regulating microtubule depolymerases, such as Kif2a and MCAK [, ]. Deletion of DDA3 causes spindle hyper-stabilisation, inter-kinectochore tension loss, chromosome congression defects. This leads to unaligned chromosomes at metaphase and the accumulation of CENP-E (a plus end-motor protein) at kinectochore in these chromosomes []. It has also been suggested that DDA3 may participate in p53/TP53-regulated growth suppression []. GTSE1 may be involved in p53-induced cell cycle arrest in G2/M phase by interfering with microtubule rearrangements that are required to enter mitosis []. When overexpressed, GTSE1 delays G2/M phase progression [].
This entry represents the N terminus of GTSE1 proteins. GTSE-1 (G2 and S phase-expressed-1) protein is specifically expressed during S and G2 phases of the cell cycle. It is mainly localised to the microtubules and when overexpressed delays the G2 to M transition. the full protein negatively regulates p53 transactivation function, protein levels, and p53-dependent apoptosis [, ]. This domain is found in eukaryotes, and is approximately 140 amino acids in length. There is a conserved FDFD sequence motif.
