Chris Sullivan
@sullivanlab.bsky.social
260 followers 560 following 7 posts
Virologist at UT Austin who works on host- pathogen interactions and RNA.
Posts Media Videos Starter Packs
sullivanlab.bsky.social
If anyone is at #RNA2025, please stop by my lab’s posters on triphosphate balance and virus infection and tracking persistent infection with precision to identify viral miRNA functions.

Authors Szymanik and Mojumder are really great and are presenting in the second session this Friday from 8-10.
sullivanlab.bsky.social
Small DNA viruses can concurrently shed via two different patterns: continuous low-level shedding of numerous reservoirs and punctuated rare high shedding from one or a few reservoirs.

We hope tools presented here are useful to study other persistent pathogens.

journals.plos.org/plospathogen...
Shedding dynamics of a DNA virus population during acute and long-term persistent infection
Author Summary/ Importance Polyomavirus infections, mostly benign but potentially fatal for immunocompromised individuals, undergo acute and long-term persistent infections. Typically, polyomavirus-as...
journals.plos.org
Reposted by Chris Sullivan
salehlabparis.bsky.social
Stop for a second and try to imagine this: a heat shock protein relocalizes to the cell surface and mediates dsRNA binding and internalization!
Intrigued? Read our newly minted paper in Science Advances www.science.org/doi/10.1126/...
Congrats to all the authors and thanks to reviewers and editor!
Hsc70-4: An unanticipated mediator of dsRNA internalization in Drosophila
Hsc70-4 localizes to the cell surface of Drosophila cells, binds to exogenous dsRNA, and mediates its internalization.
www.science.org
Reposted by Chris Sullivan
embojournal.org
New Resource Article:
Joseph Ziegelbauer @drjz.bsky.social and colleagues profile cis- and trans-acting elements of viral circRNAs and identify noncanonical mechanisms underlying back-splicing - utilizing their custom-built “CHARLIE” pipeline
www.embopress.org/doi/full/10....
sullivanlab.bsky.social
Previously, KO and overexpression showed host RNA 5’ triphosphatase DUSP11 can reduce RIG-I sensitivity.

Here, we show poxviruses code for viral DUSP11 that can regulate host RNP III transcripts and RIG-I, providing evolutionary support DUSP11 can be pro-viral.

journals.plos.org/plospathogen...
Viral piracy of host RNA phosphatase DUSP11 by avipoxviruses
Author summary Viruses face a critical challenge of disabling or avoiding host immune defenses. Cells typically recognize the presence of a virus through specific molecular markers, including triphosp...
journals.plos.org
sullivanlab.bsky.social
This work depended on the creative mind of Benni Goetz who came up with new ways to visualize and analyze virus barcode data. Unfortunately, Benni passed away before publication of his work. We hope his methods will be useful to others studying diverse microbes and persistent infection.
sullivanlab.bsky.social
This may help explain the ubiquity and success of these viruses for long term persistence.
sullivanlab.bsky.social
Please add me too. I am a virologist at UT Austin.