A 6940 bp DNA fragment from Desulfovibrio gigas contains genes coding for lipoproteins, universal stress response and transcriptional regulator protein homologues.
The nucleotide sequence of a 6940 bp DNA fragment from Desulfovibrio gigas, containing seven ORFs was determined. ORF-1 encodes a probable lipoprotein having high similarities with lytic transglycosylases. ORF-2 encodes a polypeptide that does not show homologies with proteins deposited in the database, but it contains the consensus pattern of class II aminoacyl-tRNA synthetases. The putative protein encoded by ORF-3 possesses high similarities with universal stress response proteins from the UspA family. Northern blot analysis of ORF-3 shows that it is constitutively and abundantly expressed. ORF-4 encodes a probable helix-turn-helix-containing DNA-binding protein, given the presence of the helix-turn-helix motif, characteristic of this class of proteins. Its N-terminal region has high identity with its counterparts from proteins belonging to the RRF2 family. Northern blot analysis shows that ORF-4 is transcribed as a single mRNA in contrast to its orthologue from Desulfovibrio vulgaris. ORF-5 encodes a putative fusion protein as its N- and C-termini show significant homologies with molybdenum formylmethanofuran dehydrogenase and molybdopterin biosynthesis proteins, respectively. ORF-7 encodes a prokaryotic lipoprotein having homologies with multidrug efflux and DNA damage-inducible proteins, and it is constitutively and abundantly expressed.
Silva
G
G
Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal.
Rodrigues-Pousada
C
C
D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000235:genetics*; D004269:DNA, Bacterial / Q000032:analysis / Q000235:genetics*; D003901:Desulfovibrio / Q000235:genetics*; D005809:Genes, Regulator; D008074:Lipoproteins / Q000235:genetics*; D008969:Molecular Sequence Data; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D017385:Sequence Homology
D001426:Bacterial Proteins; D004269:DNA, Bacterial; D008074:Lipoproteins