For yeast strain characterisation project BaseClear offers full solutions and complete genomics based solutions. For strain development and optimization of yeast used as production strain or food ingredient genomics is an important tool. Knowledge of the complete yeast genome is crucial to understanding and working with these strains.

BaseClear focuses on microbial genomics and offers significant expertise and years of experience in yeast strain characterisation. The microbiology experts at BaseClear understand your problems and challenges. We are happy to discuss your yeast strain characterisation project.

BaseClear options for yeast strain characterisation

  • Complete genome based strain characterisation as required for EFSA or FDA claims
  • Unique antibiotic resistance gene screening based on a highly curated CARD database
  • Plasmid detection and identification services
  • Production strain analysis including copy number and gene expression analysis
  • Yeast production strain analysis and annotation
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BaseClear strain characterisation

Strain characterisation for EFSA or FDA claims

For nutrition or health claims the Food Safety Authority (EFSA or FDA) requires full knowledge of the organism you are working with. BaseClear can facilitate this with a complete genome based strain characterisation service. We can help you with the identification of the bacterial strain and provide you with a complete genome analysis. Furthermore, BaseClear provides you with information about the location of the antibiotic resistance (chromosome or plasmid), identification of the anti-biotic resistance genes as well as identification of mobile genetic elements that may promote transfer of genomic regions coding for the antibiotic resistance to other organisms. Ultimately, this information is vital to justify why your bacterial strains may be used as a feed or food additive.

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Antibiotic resistance gene screening

The use of antibiotics during the last decade has led to antibiotic resistance among microorganisms, which is a growing public health concern worldwide. The mechanisms that enable bacteria to become resistant to antibiotics are quite diverse, but the genetic basis for the antibiotic resistance can be either intrinsic, through naturally occurring antibiotic resistance genes, or acquired through transfer of genetic material (e.g. plasmids) from other bacteria in the environment.

To minimize the risk of spreading antibiotic resistance, EFSA advises to use the least resistant organism whenever possible and that the organisms used in animal feed or used as probiotics should not add to the existent pool of antimicrobial resistance genes that are already present in the environment. Screening microorganisms for antibiotic resistance can be very laborious and time consuming. BaseClear offers a new type of antibiotic resistance gene screening based on complete genome sequencing, which is much more efficient than the classical screening methods. Using unique bioinformatics tools that are developed by our bioinformatics team, we can determine which antibiotic resistance genes are present in the microbial genome. This genome screening method can dramatically reduce the number of disk diffusion tests required.

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BaseClear Antibiotic resistance Genes

Function identification

The functions encoded in a genome are essential for the understanding of a microorganism. This can be performed by classification of the genes based on a curated database. We use different databases for this, including the Kyoto Encyclopaedia of Genes and Genomes (KEGG) and the database of Clusters of Orthologous Groups of proteins (COG). Unlike public databases, these databases are curated, meaning that the database content is managed and corrected by experts. With our gene function analysis service, you can benefit from the added value of these curated databases. The results of the gene function analysis are provided in our interactive genome explorer, offering you the possibility to search and visualize your data.

Function identification

Plasmid detection and identification

The regulations on bacterial strains and their plasmid content are becoming steadily more stringent, especially because of the dissemination of antibiotic resistance traits. Plasmids are commonly transmissible between host cells, their accessory genes can spread quickly within a bacterial community. For these reasons it is of utmost importance to know the complete genetic content of the microorganisms you are working with. BaseClear developed a unique service to help customers with rapid identification and characterisation of plasmids.

Identification of unknown plasmids within pure cultures or within communities with traditional methods was difficult. Also determination of the exact sequence of known plasmids was often not possible, for example due to repeat regions. BaseClear has now developed a state-of-the-art plasmid identification service based on the latest next generations sequencing technologies. We can fully sequence and analyse isolated plasmids, solving even complex repeat regions thanks to long read sequencing platforms. In addition, we can screen the genetic content of your strains of interest with our plasmid detection pipeline, which provides a report of high-quality sequences that match with a large and curated plasmid database.

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Plasmid detection and identification

Additional options for production strain analysis


Microorganisms can contain more than one copy of a gene, cassette or operon. This is a phenomenon that occurs regularly in yeast. The gene copy number can affect the production levels of the corresponding proteins and is therefore an essential parameter for production strain optimization. BaseClear offers a special gene copy number determination service, based on next-generation sequencing.


When new genes or gene cassettes are introduced into the genome of a microorganism, it is crucial to verify the final results of this modification. Three different questions need to be answered:

  • Is the cassette correctly inserted?
  • How many copies of the insertion cassette are incorporated into the genome?
  • Has the incorporation of the insertion cassette resulted in modification or damage of any other genes in the genome?

Using next-generation sequencing on the modified genome, BaseClear can answer these three questions. If you only need to obtain an answer to the first question, we can analyse the DNA with Sanger sequencing.


When working with microorganisms, for example as a production strain, it is important to check the strain for the presence of mutations. The most common type of mutations are SNPs (single nucleotide polymorphisms). BaseClear offers the possibility to check the complete genome by re-sequencing the strain and analysing the data via comparative genomics. We can also analyse the genome partially using Sanger sequencing.


Microorganisms can only be applied as food ingredient or production strain when they are sufficiently stable and able to function optimally under the desired conditions. Probiotic bacteria, for example, often need to be able to withstand the gastric acid and bile salts that are present in the stomach and intestines. Fermentation production strains should function optimally under the desired conditions. To investigate and optimize these characteristics, it is necessary to find out which genes are expressed in a given physiological background. Such information can be obtained via transcriptome sequencing and gene expression analysis. BaseClear offers a complete solution to determine the gene expression. This also allows for the discovery of novel exons and alternative splicing.

Gene expression analysis
BaseClear Bianomics

Online storage solutions for your microbial genomes

BaseClear offers a safe and convenient solution for management, analysis and interpretation of microbial genomes. The BaseClear platform is deployed in a regional cloud center and guarantees state-of-the art data security as well as regulatory compliance. We offer long-term data storage of NGS samples in a regional MS Azure cloud. The best solution to back-up your NGS sample data. We offer three standard categories for bacterial, yeast and fungal samples, but also storage of larger eukaryotes is possible.

BaseClear Nanopore Technology sequencing service

Meet Derek Butler!

Derek is our Commercial Director. In addition to a PhD in microbiology from the University of Cork he has more than 15 years’ experience working on microbial genomics research projects together with industrial partners.

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