Mussels are susceptible to numerous toxicants and are often employed as bioindicators. This study investigated the status of the ras proto-oncogene in Mytilus galloprovincialis following petrochemical exposure. A M. galloprovincialis homologue of the vertebrate ras gene was isolated, showing conserved sequence in regions of functional importance and a high incidence of polymorphic variation. Mutational damage was investigated in mussels chronically exposed to the water-accommodated fraction of #4 fuel-oil (WAF), and in mussels collected along the NW coast of Portugal in sites with different levels of petrochemical contamination. A ras gene point mutation was identified in the codon 35 of one individual exposed to 12.5% WAF. No mutations were detected in mussels from the WAF control or environmental samples. This represents the first report of a ras gene mutation, experimentally-induced by petrochemical exposure, in an invertebrate species. © 2008 Elsevier Ltd. All rights reserved.
Lima, I., Peck, M. R., Rendón-Von Osten, J., Soares, A. M. V. M., Guilhermino, L., & Rotchell, J. (2008). Ras gene in marine mussels: A molecular level response to petrochemical exposure. Marine pollution bulletin, 56(4), (633-640). doi:10.1016/j.marpolbul.2008.01.018. ISSN 0025-326X