Teija T Koivula

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DNA fragments with promoter activity were isolated from the chromosome of Lactococcus lactis subsp. lactis. For the isolation, a promoter probe vector based on the cat gene was constructed, which allowed direct selection with chloramphenicol in Bacillus subtilis and L. lactis. Four of the putative promoters (P1, P2, P10, and P21) were analyzed further by(More)
With TEM beta-lactamase as a reporter gene, a set of expression-secretion-promoting fragments were isolated from the chromosome of Lactococcus lactis subsp. lactis. The fact that only translocated beta-lactamase renders cells resistant to ampicillin allowed direct ampicillin selection with an Escherichia coli vector (pKTH33). The clones showing the greatest(More)
The strictly anaerobic brewery contaminants of the genera Pectinatus, Megasphaera, Selenomonas and Zymophilus in the class Clostridia constitute an important group of spoilage bacteria of unpasteurised, packaged beers. The aim of this study was to develop and evaluate group-specific PCR methods to detect and differentiate these bacteria in beer. A(More)
We have sequenced a gene from Bacillus acidocaldarius which encodes an open reading frame (ORF3) of 310 amino acids. The ORF3 was found to be related to the mammalian hormone-sensitive lipase (HSL). Searching the protein data base revealed five other bacterial proteins related to the HSL. Upon further sequence comparisons this HSL-group was found to be(More)
Diversity within bacteria isolated from activated sludge and the Baltic sea and recognized by the rRNA targeted oligonucleotide probe ppT (designed by BRAUN-HOWLAND et al., 1993 to recognize C. testosteroni) was studied. The partial nucleotide sequences of 16S genes of the isolates revealed that the activated sludge and Baltic sea isolates each formed a(More)
The cultivated and uncultivated bacterial communities of an activated sludge plant were studied. Two samples were taken and a total of 516 bacterial isolates were classified into groups using their whole-cell protein patterns. The distribution of bacteria into protein-pattern groups differed significantly between the two samples, suggesting variation in(More)
Two starch-degrading enzymes produced by Bacillus acidocaldarius (renamed as Alicyclobacillus acidocaldarius) were identified. According to SDS-PAGE, the apparent molecular masses of the enzymes were 90 and 160 kDa. Eight peptide fragments and the N-terminal end of the 90 kDa polypeptide were sequenced. An oligonucleotide, based on the amino acid sequence(More)
BACKGROUND Tetanus is a severe infection that can be prevented by vaccination. In developing countries vaccination coverage is not always high and in developed countries cases may still occur, particularly in elderly people owing to their reduced immunoprotection. It has been estimated that there are about one million cases of tetanus per year globally. In(More)
Sec Y is an integral membrane protein which participates in the translocation of proteins through the bacterial cell membrane. We have cloned the sec Y gene of Lactococcus lactis, and found its deduced protein sequence, 439 amino acids long, to be similar in length to the previously determined Sec Y proteins of Escherichia coli, Bacillus subtilis and(More)
The mineralization potential of forest humus and the self-cleaning potential of a boreal coniferous forest environment for polycyclic aromatic hydrocarbon (PAH) compounds was studied using a model ecosystem of acid forest humus (pH = 3.6) and pyrene as the model compound. The matrix was natural humus or humus mixed with oil-polluted soil in the presence and(More)