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Mol Cell Biochem
2005 Jan 01;2691-2:189-201. doi: 10.1007/s11010-005-3084-2.
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ARP2 a novel protein involved in apoptosis of LNCaP cells shares a high degree homology with splicing factor Prp8.
Tapia-Vieyra JV
,
Arellano RO
,
Mas-Oliva J
.
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The mechanism of apoptosis has been recognized as an important event in processes such as cellular development and homeostasis, as well as degenerative conditions like cancer. Prostate cancer during its advanced stages develops androgen independent cells that ultimately overgrow and promote metastatic events. Our group employing androgen independent LNCaP cells have previously proposed, based on electrophysiological findings, that apoptosis induced cells overexpress a cell death calcium channel-like molecule. Here we report the cloning and expression in Xenopus laevis oocytes of apoptosis regulated protein 2 (ARP2), a protein overexpressed in apoptosis induced LNCaP cells capable to induce calcium inward currents and apoptosis typical morphology changes in oocytes injected with arp2 mRNA. Our results also indicate that clone arp2 cDNA (1.3Kb) shares a 99% homology with a small fragment that corresponds to 18% of the complete sequence of Prp8 cDNA (7.0 Kb), a molecule that codifies for an important protein in the assembly of the spliceosome. We propose that protein ARP2 as a fragment of protein Prp8, corresponds to a molecule with a new function in apoptosis related phenomena.
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