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Candida metapsilosis

ABSTRACT: Genome sequencing and analysis of C. metapsilosis marine strains

PROVIDER: PRJNA1050898 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR27195572_1.fastq.gz	Fastqsanger.gz
	SRR27195572_2.fastq.gz	Fastqsanger.gz
	SRR27195573_1.fastq.gz	Fastqsanger.gz
	SRR27195573_2.fastq.gz	Fastqsanger.gz
	SRR27195574_1.fastq.gz	Fastqsanger.gz

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Candida metapsilosis

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Candida orthopsilosis

Project description:Genome sequencing and analysis of C. orthopsilosis and C. metapsilosis marine strains

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Candida metapsilosis strain:ATCC 96143

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Project description:Candida orthopsilsosis and Candida metapsilosis hybrid strains Genome sequencing

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Candida orthopsilosis and Candida metapsilosis spp. nov. to replace Candida parapsilosis groups II and III.

Project description:Two new species, Candida orthopsilosis and C. metapsilosis, are proposed to replace the existing designations of C. parapsilosis groups II and III, respectively. The species C. parapsilosis is retained for group I isolates. Attempts to construct a multilocus sequence typing scheme to differentiate individual strains of C. parapsilosis instead revealed fixed DNA sequence differences between pairs of subgroups in four genes: COX3, L1A1, SADH, and SYA1. PCR amplicons for sequencing were obtained for these four plus a further seven genes from 21 group I isolates. For nine group II isolates, PCR products were obtained from only 5 of the 11 genes, and for two group III isolates PCR products were obtained from a different set of 5 genes. Three of the PCR products from group II and III isolates differed in size from the group I products. Cluster analysis of sequence polymorphisms from COX3, SADH, and SYA1, which were common to the three groups, consistently separated the isolates into three distinct sets. All of these differences, together with DNA sequence similarities <90% in the ITS1 sequence, suggest the subgroups should be afforded species status. The near absence of DNA sequence variability among isolates of C. parapsilosis and relatively high levels of sequence variability among isolates of C. orthopsilosis suggest that the former species may have evolved very recently from the latter.

| S-EPMC540126 | biostudies-literature

Identification of a novel Candida metapsilosis isolate reveals multiple hybridization events.

Project description:Candida metapsilosis is a member of the Candida parapsilosis species complex, a group of opportunistic human pathogens. Of all the members of this complex, C. metapsilosis is the least virulent, and accounts for a small proportion of invasive Candida infections. Previous studies established that all C. metapsilosis isolates are hybrids, originating from a single hybridization event between two lineages, parent A and parent B. Here, we use MinION and Illumina sequencing to characterize a C. metapsilosis isolate that originated from a separate hybridization. One of the parents of the new isolate is very closely related to parent A. However, the other parent (parent C) is not the same as parent B. Unlike C. metapsilosis AB isolates, the C. metapsilosis AC isolate has not undergone introgression at the mating type-like locus. In addition, the A and C haplotypes are not fully collinear. The C. metapsilosis AC isolate has undergone loss of heterozygosity with a preference for haplotype A, indicating that this isolate is in the early stages of genome stabilization.

| S-EPMC8727981 | biostudies-literature

The Genomic Aftermath of Hybridization in the Opportunistic Pathogen Candida metapsilosis.

Project description:Candida metapsilosis is a rarely-isolated, opportunistic pathogen that belongs to a clade of pathogenic yeasts known as the C. parapsilosis sensu lato species complex. To gain insight into the recent evolution of C. metapsilosis and the genetic basis of its virulence, we sequenced the genome of 11 clinical isolates from various locations, which we compared to each other and to the available genomes of the two remaining members of the complex: C. orthopsilosis and C. parapsilosis. Unexpectedly, we found compelling genomic evidence that C. metapsilosis is a highly heterozygous hybrid species, with all sequenced clinical strains resulting from the same past hybridization event involving two parental lineages that were approximately 4.5% divergent in sequence. This result indicates that the parental species are non-pathogenic, but that hybridization between them formed a new opportunistic pathogen, C. metapsilosis, that has achieved a worldwide distribution. We show that these hybrids are diploid and we identified strains carrying loci for both alternative mating types, which supports mating as the initial mechanism for hybrid formation. We trace the aftermath of this hybridization at the genomic level, and reconstruct the evolutionary relationships among the different strains. Recombination and introgression -resulting in loss of heterozygosis- between the two subgenomes have been rampant, and includes the partial overwriting of the MTLa mating locus in all strains. Collectively, our results shed light on the recent genomic evolution within the C. parapsilosis sensu lato complex, and argue for a re-definition of species within this clade, with at least five distinct homozygous lineages, some of which having the ability to form hybrids.

| S-EPMC4627764 | biostudies-literature

Correction: The Genomic Aftermath of Hybridization in the Opportunistic Pathogen Candida metapsilosis.

Project description:[This corrects the article DOI: 10.1371/journal.pgen.1005626.].

| S-EPMC4945001 | biostudies-literature