PhD Projects » ESR 13: Functional inferences from colinear crAssphage genomes

Daniel Carrillo

I am Daniel Carrillo and I come from Spain. It was during my BSc in Biotechnology that I discovered bioinformatics and knew that I wanted to dedicate to it, and thereby my bachelor thesis was about in silico development of antimicrobial compounds. After this, I did my MSc in Bioinformatics at the University of Valencia.

I got hired soon by a company to work as a bioinformatician. My four years there allowed me to gain sound knowledge about DNA sequencing and all the different kinds of analyses that can come after it. My main focuses there were metagenomics, bacterial genomics and transcriptomics. However, I had not the opportunity to work on any project involving phages, organisms that I always have found very intriguing.

For my PhD, I am excited to join Utrecht University to study the most prevalent phages in the human gut, the crAssphages. I am interested in understanding how these phages have evolved, how they relate to their bacterial hosts, and when they first became associated to the human lineage. Shedding light on these questions will contribute to understand which is the role of phages in the human gut virome.

If I am not coding, you will probably find me reading a Roman’s history book, painting miniatures, or playing the guitar. Except if it is sunny, then I am outside.

Host institution:
Utrecht University (UU), the Netherlands
Local supervisor:
Dr. Bas E. Dutilh (UU)
Local co-supervisor:
Dr. Pieter-Jan Haas (University Medical Center Utrecht)
Project partner:
Nikolas Basler (ESR 11)
Work packages:
WP 1.1 Virus identification
WP 1.3 Virus-host interactions

Bas E. Dutilh
Pieter-Jan Haas

Project description

Viruses related to crAssphage, a bacteriophage discovered by us in 2014, are abundant in the intestinal tract of humans around the world. We computationally predicted that crAss-like phages infect Bacteroidetes hosts and this was confirmed when the virus was recently cultured. Strikingly, amplification of the virus did not impair the host, but the molecular mechanisms involved remain unknown because the proteins involved in host interaction remain unknown. ESR 13 will focus on identifying host-interaction proteins in crAssphage. We recently discovered that crAss-like phages have been genomically co-linear for millions of years yet encode different proteins in similar genomic contexts.

Significant host-association proteins will be validated at the KU Leuven viromics group by exploiting available human and insect-associated viromes (ESR 11). Thus, we will exploit signals from fundamental processes in genome evolution to predict host-interaction proteins and further our understanding of virus-host interactions.