News

  • PICA talk on ASM Microbe 2017 conference

    02.06.17
    Event
    PICA and the concept of phenotypic trait prediction for draft genomes will be presented in a Plenary Lecture on the ASM Microbe Conference 2017 in New Orleans. Don't miss it: June 2, 2017, 8:45 AM. 018. Understanding the Microbiome: Old ...
  • First release of 45 PICA models ready for download

    01.06.17
    News
    The first release of 45 PICA models is available on this site in the Download area. Brief instructions on the download page will enable you to install the PICA software and the models on a Linux computer. Additionally, HMMER3 and ...
  • Schedule for this website in 2017

    30.05.17
    News

    This website is heavily under construction. We have created it in May 2017, when we succeeded in rapid genotype prediction based on a parallel HMMER3 server farm. With about 1 minute of compute time per genome, it became clear that ...

Publications

Prediction of microbial phenotypes based on comparative genomics.

The accessibility of almost complete genome sequences of uncultivable microbial species from metagenomes necessitates computational methods predicting microbial phenotypes solely based on genomic data. Here we investigate how comparative genomics can be utilized for the prediction of microbial phenotypes. The PICA framework facilitates application and comparison of different machine learning techniques for phenotypic trait prediction. We have improved and extended PICA's support vector machine plug-in and suggest its applicability to large-scale genome databases and incomplete genome sequences. We have demonstrated the stability of the predictive power for phenotypic traits, not perturbed by the rapid growth of genome databases. A new software tool facilitates the in-depth analysis of phenotype models, which associate expected and unexpected protein functions with particular traits. Most of the traits can be reliably predicted in only 60-70% complete genomes. We have established a new phenotypic model that predicts intracellular microorganisms. Thereby we could demonstrate that also independently evolved phenotypic traits, characterized by genome reduction, can be reliably predicted based on comparative genomics. Our results suggest that the extended PICA framework can be used to automatically annotate phenotypes in near-complete microbial genome sequences, as generated in large numbers in current metagenomics studies.
Feldbauer R, Schulz F, Horn M, Rattei T
2015 - BMC Bioinformatics, S1