sysbiolab

OUR RESEARCH 01 / 04

One disrupted node. A system-wide response.

Network perturbation → Molecular cascade → Loss of viability

SYSTEMS BIOLOGY OF BACTERIAL INFECTION · UAB

Small interactions.
Big implications.

Understanding how bacteria interact with their hosts.
Discovering new ways to fight bacterial infection.

Explore our research
BACTERIAL INFECTION · FROM MOLECULES TO SYSTEMSBARCELONA, SPAIN

THE QUESTIONS THAT DRIVE US

To understand infection,
look at the connections.

We combine systems biology, structural modelling and experiments to understand bacterial infection—and find new ways to intervene.

01

How bacteria rewire the host

Which contacts between bacterial and human proteins make infection possible? We map host–pathogen protein interactions, relate network organisation to bacterial fitness, and study the complexes that bacteria use to enter, survive and proliferate inside host cells. Our work on imperfect structural mimicry examines how bacterial proteins resemble host interfaces while retaining features that could help distinguish microbial targets from human ones.

Our approach

Host–pathogen interactomics · Network analysis · Infection phenotypes

Explore the workBacteria use structural imperfect mimicry to hijack the host interactome
02

Finding vulnerabilities at protein interfaces

Proteins work together, and some partnerships are essential for bacterial survival. We combine genetic evidence with AlphaFold2 structure prediction to study the bacterial essential interactome. We also evaluate docking and molecular dynamics approaches for targeting protein–protein interfaces. These structural insights guide the design of peptides, peptidomimetics and small molecules intended to disrupt bacterial or host–pathogen complexes.

Our approach

AlphaFold2 · Protein docking · Molecular dynamics · Structure-guided design

Explore the workStructural assembly of the bacterial essential interactome
03

Following infection as it unfolds

Infection is a dialogue that changes over time. We use time-resolved transcriptomics to study both bacterial behaviour and the host response. In our work on Pseudomonas aeruginosa and cystic fibrosis, dual RNA sequencing of infected airway epithelial cultures at an air–liquid interface captures changes during biofilm formation. Related work examines epithelial-cell responses to intracellular Acinetobacter baumannii. Together, these approaches connect molecular changes with the course of bacterial infection.

Our approach

Dual RNA sequencing · Airway epithelial models · Biofilms · Time-resolved analysis

Explore the workTime-resolved dual transcriptomics of Pseudomonas aeruginosa biofilm formation in cystic fibrosis
04

Designing the next antimicrobial peptides

We search proteins for hidden antimicrobial sequences and improve promising peptides through prediction, rational design and experimental testing. Our recent work explores cryptic peptides in the heparin-binding proteome that selectively kill Gram-negative bacteria. We study properties such as activity, selectivity and serum stability, while tools including AMPA and PyAMPA make peptide prediction and optimisation accessible to other researchers. The aim is to develop better leads against drug-resistant bacteria.

Our approach

Machine learning · Peptide design · Activity prediction · Experimental characterisation

Explore the workMining the heparinome for cryptic antimicrobial peptides that selectively kill Gram-negative bacteria

FROM OUR LAB

Science in progress.

All publications
2026

ACS Bio & Med Chem Au

Antimicrobial Peptides Beyond the Petri Dish: Translational Barriers to Therapeutic Development

Marc Torrent

2026

European Journal of Medicinal Chemistry,310:118784

Targeting Staphylococcus aureus with Potent De Novo-Designed Proline-Core Short Antimicrobial Lipopeptides

Antonia D’Aniello, Veronica Folliero, Roberto Bello-Madruga, Vincenzo Mazzarella, Alessandra Del Bene, Federica Dell’Annunziata, Ilaria Cosimato, Flora Salzano, Ida De Chiara, Milena Della Gala, Roberto Cutolo, Martina Torino, Salvatore Mottola, Anna Messere, Lidia Muscariello, Sandro Cosconati, David Andreu, Marc Torrent Burgas, Gianluigi Franci, Salvatore Di Maro

2025

Veterinary Research,56:173

Exploring the therapeutic potential of recombinant bovine β-defensins for antimicrobial and anti-inflammatory functions in sepsis management

Cristina Saubi, Ricardo Baltà-Foix, Jose Vicente Carratalá, Francesc Fàbregas, Daniel Sandín, Marc Torrent, Elena Garcia-Fruitós, Anna Arís

THE PEOPLE BEHIND THE QUESTIONS

Different perspectives.
Shared curiosity.

Our team brings together experimental and computational approaches to the biology of infection.

Meet the team
Marc TorrentEnea Sancho-VaelloVeronika YoungAlba Guembe

OUR RESEARCH BEYOND THE LAB

In the media.

All news & media

LET’S CONNECT

Good science starts
with a conversation.

Interested in our research, a collaboration or joining the lab?

marc.torrent@uab.cat

Department of Biochemistry and Molecular Biology
Universitat Autònoma de Barcelona · Barcelona, Spain