Cloning and sequencing of the dnaK and grpE genes of Legionella pneumophila.
A 4.4-kb DNA fragment from Legionella pneumophila (Lp) was isolated, which could complement an Escherichia coli (Ec) dnaK ts mutant, HC4102. Nucleotide sequence analysis of the region revealed two complete open reading frames (ORFs) encoding both a predicted DnaK protein of 644 aa and a predicted GrpE protein of 199 aa, and also the 5'-end of the predicted dnaJ gene organized in the order of grpE-dnaK-dnaJ. Consensus heat shock (HS) promoter sequences were identified upstream of the start of both grpE and dnaK transcripts. However, no obvious promoter sequences were detected upstream of dnaJ. The transcription start points of grpE and dnaK were determined by primer extension analysis and the amount of each of the transcripts increased four- to eightfold after HS.
Amemura-Maekawa
J
J
Department of Bacteriology, National Institute of Infectious Diseases, Tokyo, Japan.
Watanabe
H
H
D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D003001:Cloning, Molecular; D004926:Escherichia coli / Q000235:genetics; D029968:Escherichia coli Proteins; D005798:Genes, Bacterial / Q000235:genetics*; D050956:HSP40 Heat-Shock Proteins; D018840:HSP70 Heat-Shock Proteins / Q000235:genetics*; D006360:Heat-Shock Proteins / Q000235:genetics*; D016952:Legionella pneumophila / Q000235:genetics*; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D011401:Promoter Regions, Genetic / Q000235:genetics; D012329:RNA, Bacterial / Q000032:analysis; D012333:RNA, Messenger / Q000032:analysis; D015183:Restriction Mapping; D017422:Sequence Analysis, DNA; D013696:Temperature; D014158:Transcription, Genetic / Q000235:genetics
D001426:Bacterial Proteins; C494635:DnaJ protein, E coli; D029968:Escherichia coli Proteins; C068113:GrpE protein, Bacteria; C489400:GrpE protein, E coli; D050956:HSP40 Heat-Shock Proteins; D018840:HSP70 Heat-Shock Proteins; D006360:Heat-Shock Proteins; D012329:RNA, Bacterial; D012333:RNA, Messenger; C063842:dnaK protein, E coli