Evidence map›Paper›PMID 31801527›Full record

ArticleMicrobial cell factories2019

Genomic diversity and meiotic recombination among isolates of the biotech yeast Komagataella phaffii (Pichia pastoris).

Stephanie Braun-Galleani, Julie A Dias, Aisling Y Coughlan, Adam P Ryan, Kevin P Byrne, Kenneth H Wolfe

Abstract read
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Article in Microbial cell factories, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

15 citing papers in PubMed.

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  9. Heterologous Expression of Extracellular Proteinase pAsPs ofInternational journal of molecular sciences · 2022
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  15. Frontiers in microbiology · 2020
    Review
4 · The record

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PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Stephanie Braun-GalleaniUCD Conway Institute, School of Medicine, University College Dublin, Dublin, Ireland.
Julie A DiasUCD Conway Institute, School of Medicine, University College Dublin, Dublin, Ireland.
Aisling Y CoughlanUCD Conway Institute, School of Medicine, University College Dublin, Dublin, Ireland.
Adam P RyanUCD Conway Institute, School of Medicine, University College Dublin, Dublin, Ireland.
Kevin P ByrneUCD Conway Institute, School of Medicine, University College Dublin, Dublin, Ireland.
Kenneth H WolfeUCD Conway Institute, School of Medicine, University College Dublin, Dublin, Ireland. kenneth.wolfe@ucd.ie.ORCID http://orcid.org/0000-0003-4992-4979

Funding

Science Foundation Ireland 13/IA/1910
6 · The paper itself

Abstract

backgroundKomagataella phaffii is a yeast widely used in the pharmaceutical and biotechnology industries, and is one of the two species that were previously called Pichia pastoris. However, almost all laboratory work on K. phaffii has utilized strains derived from a single natural isolate, CBS7435. There is little information about the sequence diversity of K. phaffii or the genetic properties of this species.

resultsWe sequenced the genomes of all the known isolates of K. phaffii. We made a genetic cross between derivatives of two isolates that differ at 44,000 single nucleotide polymorphism sites, and used this cross to analyze the rate and landscape of meiotic recombination. We conducted tetrad analysis by making use of the property that K. phaffii haploids do not mate in rich media, which enabled us to isolate and sequence the four types of haploid cell that are present in the colony that forms when a tetra-type ascus germinates.

conclusionsWe found that only four distinct natural isolates of K. phaffii exist in public yeast culture collections. The meiotic recombination rate in K. phaffii is approximately 3.5 times lower than in Saccharomyces cerevisiae, with an average of 25 crossovers per meiosis. Recombination is suppressed, and genetic diversity among natural isolates is low, in a region around centromeres that is much larger than the centromeres themselves. Our work lays a foundation for future quantitative trait locus analysis in K. phaffii.

Indexed as

GenomicsMeiosisPichiaRecombination, GeneticSaccharomyces cerevisiaeEvolutionGenetic diversityRecombinationYeasts

Identifiers

PMID31801527
PMCPMC6894112

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.