New BUSCO vs (very old) CEGMA

If I’m only going to write one or two blog posts a year on this blog, then it makes sense to return to my recurring theme of don’t use CEGMA, use BUSCO!

In 2015 I was foolishly optimistic that the development of BUSCO would mean that people would stop using CEGMA — a tool that we started developing in 2005 and which used a set of orthologs published in 2003! — and that we would reach ‘peak-CEGMA’ citations that year.

That didn’t happen. At the end of 2017, I again asked the question have we reached peak-CEGMA? because we had seen ten consecutive years of increasing publications.

Well I’m happy to announce that 2017 did indeed see citations to our 2007 CEGMA paper finally peak:

CEGMA citations by year (from Google Scholar)

CEGMA citations by year (from Google Scholar)

Although we have definitely passed peak CEGMA, it still receives over a 100 citations a year and people really should be using tools like BUSCO instead.

This neatly leads me to mention that a recent publication in Molecular Biology and Evolution describes an update to BUSCO:

From the introduction:

With respect to v3, the last BUSCO version, v5, features: 1) a major upgrade of the underlying data sets in sync with OrthoDB v10; 2) an updated workflow for the assessment of prokaryotic and viral genomes using the gene predictor Prodigal (Hyatt et al. 2010); 3) an alternative workflow for the assessment of eukaryotic genomes using the gene predictor MetaEuk (Levy Karin et al. 2020); 4) a workflow to automatically select the most appropriate BUSCO data set, enabling the analysis of sequences of unknown origin; 5) an option to run batch analysis of multiple inputs to facilitate high-throughput assessments of large data sets and metagenomic bins; and 6) a major refactoring of the code, and maintenance of two distribution channels on Bioconda (Grüning et al. 2018) and Docker (Merkel 2014).

Please, please, please…don’t use CEGMA anymore! It is enjoying a well-earned retirement at the Sunnyvale Home for Senior Bioinformatics Tools.

We have not yet reached peak CEGMA

I was alerted to some disturbing news this weekend: CEGMA won't die!

CEGMA is a tool that I helped develop back in 2005. The first formal publication that describes CEGMA came out in 2007, and since then it has seen year-on-year growth in the number of citations to this paper.

I keep on thinking that this trend must end soon, and I was therefore hopeful that 2014 might have been the year of peak CEGMA. There were three reasons why I thought this might happen:

  1. CEGMA is no longer being developed or supported
  2. I have used the PubMed page for the CEGMA paper to advocate that people should no longer use this tool
  3. CEGMA is heavily reliant on an — increasingly out-of-date — database of orthologs that was published in 2003

However, despite my best wishes, Google Scholar has revealed to me that 2015 has now seen more citations to the CEGMA paper than in any previous year:

CEGMA citation details from Google Scholar

I'm hopeful that the development of the BUSCO software by Felipe Simão et al. will mean that 2015 will definitely be the year of peak CEGMA!

BUSCO — the tool that will hopefully replace CEGMA — now has a plant-specific dataset

With the demise of CEGMA I have previously pointed people towards BUSCO. This tool replicates most of what CEGMA did but seems to be much faster and requires fewer dependencies. Most importantly, it is also based on a much more updated set of orthologous genes (OrthoDB) compared to the aging KOGs database that CEGMA used.

The full publication of BUSCO appeared today in the journal Bioinformatics. I still haven't tried using the tool, but one critique that I have seen by others is that there are no plant-specific datasets of conserved genes to use with BUSCO. This appears to be something that the developers are aware of, because the BUSCO website now indicates that a plant dataset is available (though you have to request it).

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