Assays for resistance to echinocandin-class drugs
First Claim
Patent Images
1. A nucleic acid assay for detecting a mutation in fungi susceptible to echinocandin drugs and containing the FKS1 gene corresponding to 1-3β
- -D-glucan synthase subunit Fks1p comprising;
obtaining cells of a fungus;
lysing the cells to obtain nucleic acid molecules of the cells, said nucleic acid molecules comprising said FKS1 gene or a portion thereof;
contacting the nucleic acid molecules with primers for the FKS1 gene or a portion thereof, a polymerase, and dNTPs;
exponentially amplifying a first nucleic acid target sequence of the FKS1 gene corresponding to at least a portion of CaFks1p amino acids 636 to 654 that includes amino acids 641 to 649 to generate an amplified first target sequence,contacting the amplified first target sequence with a first labeled hybridization probe specific for an amino acid mutation corresponding to one selected from the group consisting of S645P, S645Y, and S645F of CaFks1p, anddetecting whether the mutation is present by detecting hybridization between the amplified first target sequence and the first labeled hybridization probe.
3 Assignments
0 Petitions
Accused Products
Abstract
Nucleic acid amplification assays for mutations to two short sections of the fungal gene FKS1. Mutations in these target sequences have been shown to correlate with resistance to echinocandin-class drugs. Assays may include detection by sequencing or by labeled hybridization probes. Also, primers, probes and reagent kits for performing such assays.
8 Citations
13 Claims
-
1. A nucleic acid assay for detecting a mutation in fungi susceptible to echinocandin drugs and containing the FKS1 gene corresponding to 1-3β
- -D-glucan synthase subunit Fks1p comprising;
obtaining cells of a fungus; lysing the cells to obtain nucleic acid molecules of the cells, said nucleic acid molecules comprising said FKS1 gene or a portion thereof; contacting the nucleic acid molecules with primers for the FKS1 gene or a portion thereof, a polymerase, and dNTPs; exponentially amplifying a first nucleic acid target sequence of the FKS1 gene corresponding to at least a portion of CaFks1p amino acids 636 to 654 that includes amino acids 641 to 649 to generate an amplified first target sequence, contacting the amplified first target sequence with a first labeled hybridization probe specific for an amino acid mutation corresponding to one selected from the group consisting of S645P, S645Y, and S645F of CaFks1p, and detecting whether the mutation is present by detecting hybridization between the amplified first target sequence and the first labeled hybridization probe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- -D-glucan synthase subunit Fks1p comprising;
Specification