Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving nucleic acid
Patent
1992-03-27
1997-08-19
Marschel, Ardin H.
Chemistry: molecular biology and microbiology
Measuring or testing process involving enzymes or...
Involving nucleic acid
435810, 435921, 435922, 435924, 436501, 536 231, 536 243, 536 2432, 935 18, 935 77, 935 78, C12Q 168, C07H 2102, C07H 2104
Patent
active
056587260
ABSTRACT:
A method for constructing a cDNA probe for use in detecting in a sample, under conditions of predetermined stringency, a target organism belonging to a strain of fungal microorganisms, and not detecting in the sample under such conditions a reference microorganism or any prokaryotic microorganism, includes the steps of determining a nucleotide base sequence in a variable region of small subunit ribosomal RNA from the target organism, the variable region being a region of the small subunit ribosomal RNA that is poorly conserved among eukaryotes and having no corresponding region in prokaryotes; comparing the nucleotide base sequence in the corresponding region of small subunit ribosomal RNA from the reference microorganism, and selecting as a useful probe site a subsequence within the determined sequence; and synthesizing a cDNA complementary to the useful probe site, the cDNA being the probe. Nucleic acid probes are constructed according to the disclosed method. A method for using such a probe for detecting a strain of fungal microorganisms in a sample includes the steps of providing such a probe, deriving RNA from the sample, contacting the probe with the RNA under conditions that allow the probe to hybridize with small subunit rRNA to form hybrid nucleic acid complexes, and detecting the hybrid nucleic acid complexes as an indication of the presence in the sample of the organism. A kit includes such a probe and instructions for its use.
REFERENCES:
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Magee, J. Bacteriol. 169:1639, 1987.
Zwieb et al. (1981) Nucleic Acids Research, vol. 9, No. 15, pp. 3621-3640.
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Amoco Corporation
Galloway Norval B.
Marschel Ardin H.
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