Molecular characterization of the niaD and pyrG genes from Penicillium camemberti, and their use as transformation markers

• Autorzy: Navarrete K , Roa A. , Vaca I. , Espinosa Y. , Navarro C. , Chavez R.
• Języki publikacji: EN

Abstrakty

EN

Genetic manipulation of the filamentous fungus Penicillium camemberti has been limited by a lack of suitable genetics tools for this fungus. In particular, there is no available homologous transformation system. In this study, the nitrate reductase (niaD) and orotidine-5′-monophosphate decarboxylase (pyrG) genes from Penicillium camemberti were characterized, and their suitability as metabolic molecular markers for transformation was evaluated. The genes were amplified using PCR-related techniques, and sequenced. The niaD gene is flanked by the nitrite reductase (niiA) gene in a divergent arrangement, being part of the putative nitrate assimilation cluster in P. camemberti. pyrG presents several polymorphisms compared with a previously sequenced pyrG gene from another P. camemberti strain, but almost all are silent mutations. Southern blot assays indicate that one copy of each gene is present in P. camemberti. Northern blot assays showed that the pyrG gene is expressed in minimal and rich media, and the niaD gene is expressed in nitrate, but not in reduced nitrogen sources. The functionality of the two genes as transformation markers was established by transforming A. nidulans pyrG- and niaD-deficient strains. Higher transformation efficiencies were obtained with a pyrG-containing plasmid. This is the first study yielding a molecular and functional characterization of P. camemberti genes that would be useful as molecular markers for transformation, opening the way for the future development of a non-antibiotic genetic transformation system for this fungus.

Słowa kluczowe

EN

molecular characteristics; niaD gene; pyrG gene; Penicillium camemberti; transformation marker; Aspergillus nidulans

• Wydawca: -
• Czasopismo: Cellular and Molecular Biology Letters
• Rocznik: 2009
• Tom: 14
• Numer: 4
• Opis fizyczny: p.692-702,fig.,ref.

Twórcy

autor

Navarrete K

• Universidad de Santiago de Chile USACH, Alameda 3363, Estacion Central 9170022, Santiago, Chile

autor

Roa A.

autor

Vaca I.

autor

Espinosa Y.

autor

Navarro C.

autor

Chavez R.

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