The sequence of an 11.1 kb fragment on the left arm of Saccharomyces cerevisiae chromosome VII reveals six open reading frames including NSP49, KEM1 and four putative new genes

Sequencing of a 40.5 kb fragment located on the left arm of chromosome VII from Saccharomyces cerevisiae

The nucleotide sequence of a 40.5 kb DNA fragment from the left arm of chromosome VII of Saccharomyces cerevisiae was determined and analysed. Twenty-eight open reading frames (ORFs) longer than 300 nucleotides were identified. Eight of the them correspond to the following known yeast genes: EMP24, GCN1, SPO8, COX13, CDC55, RPS26, COX4 and LSR1, also called GTS1. Twelve ORFs are new, among them eight show homology with other genes while four have no homology with any sequence in the databases. Eight additional ORFs are internal to or partially overlapping with other ORFs.

A putative helicase, the SUA5, PMR1, tRNALys1 genes and four open reading frames have been detected in the DNA sequence of an 8.8 kb fragment of the left arm of chromosome VII of Saccharomyces cerevisiae

We report the sequence of an 8.8 kb segment of DNA from the left arm of chromosome VII of Saccharomyces cerevisiae. The sequence reveals seven open reading frames (ORFs) G1651, G1654, G1660, G1663, G1666, G1667 and G1669 greater than 100 amino acids in length and the tRNALys1 gene. ORF G1651 shows 100% identity with the ROK1 protein which is a putative RNA helicase of the 'DEAD box' protein family. ORF G1654 exhibits a motif highly conserved in ATP/GTP binding proteins generally referred to as 'P-loop'. From FastA analysis, G1660 and G1666 were found to be previously sequenced genes, respectively SUA5 and PMR1. The three other ORFs identified are partially (G1663) or completely (G1667 and G1669) overlapping with the PMR1 sequence on the complementary strand. This feature, together with their low codon adaptation indexes and the absence of significant homology with known proteins suggest that they do not correspond to real genes.