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Cloning and disruption of the YNR1 gene encoding the nitrate reductase apoenzyme of the yeast Hansenula polymorpha
Author(s) -
Avila Julio,
Pérez M.Dolores,
Brito Nélida,
González Celedonio,
Siverio JoséM.
Publication year - 1995
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(95)00511-7
Subject(s) - nitrate reductase , genomic dna , southern blot , biology , complementary dna , microbiology and biotechnology , gene , genomic library , molecular cloning , cloning (programming) , biochemistry , yeast , dna , nitrate , enzyme , peptide sequence , ecology , computer science , programming language
The nitrate reductase gene ( YNR1 ) from the yeast H. polymorpha was isolated from a lambda EMBL3 genomic DNA library. As probe a 350 bp DNA fragment synthesized by PCR from H. polymorpha cDNA was used. By DNA sequencing an ORF of 2,577 bp was found. The predicted protein has 859 amino acids and presents high identity with nitrate reductases from other organisms. Chromosomal disruption of YNR1 causes inability to grow in nitrate. Northern blot analysis showed that YNR1 expression is induced by nitrate and repressed by ammonium.