Portal de Periódicos da CAPES

Alterations of the PPP2R1B Gene in Human Lung and Colon Cancer

1998; American Association for the Advancement of Science; Volume: 282; Issue: 5387 Linguagem: Inglês

10.1126/science.282.5387.284

1095-9203

Steven Siqing Wang, Edward D. Esplin, Jia Ling Li, Liying Huang, Adi Gazdar, John D. Minna, Glen A. Evans,

RNA modifications and cancer

The PPP2R1B gene, which encodes the β isoform of the A subunit of the serine/threonine protein phosphatase 2A (PP2A), was identified as a putative human tumor suppressor gene. Sequencing of the PPP2R1B gene, located on human chromosome 11q22-24, revealed somatic alterations in 15% (5 out of 33) of primary lung tumors, 6% (4 out of 70) of lung tumor–derived cell lines, and 15% (2 out of 13) of primary colon tumors. One deletion mutation generated a truncated PP2A-Aβ protein that was unable to bind to the catalytic subunit of the PP2A holoenzyme. The PP2R1B gene product may suppress tumor development through its role in cell cycle regulation and cellular growth control.