Sign in

Aoife Heaslip

@atheaslip.bsky.social
167 followers 111 following 20 posts

Associate Professor at UConn studying Toxoplasma gondii, myosin motors, actin organization and vesicle trafficking. Twin Mom. she|her

PostsRepliesMedia
Aoife Heaslip @atheaslip.bsky.social · 21/05/2026
So, MyoF oligomers remodel actin architecture. This is important because apicomplexan actin systems are highly divergent from canonical eukaryotic models. The study helps explain how parasites evolved specialized solutions for intracellular organization.
000
Aoife Heaslip @atheaslip.bsky.social · 21/05/2026
This creates a compelling model where multi-headed MyoF assemblies generate force collectively to reorganize actin networks rather than simply transporting vesicles.
100
Aoife Heaslip @atheaslip.bsky.social · 21/05/2026
Full-length MyoF behaves differently - Single molecules can move on bundled or parasite actin filaments. The explanation is oligomerization mediated by the WD40 β-propeller tail domain.
100
Aoife Heaslip @atheaslip.bsky.social · 21/05/2026
MyoF contains a distinctive WD40 β-propeller domain found only in Apicomplexa and closely related species. Motors lacking the WD40 tail can bind/translocate actin, but cannot "walk" along actin as a single molecule – a characteristic typically found in cargo transport motors.
100
Aoife Heaslip @atheaslip.bsky.social · 21/05/2026
Toxoplasma infects ~1/3 of the global population. To survive, the parasite uses actin filaments to precisely organize and transport cargo inside the cell. Prior work showed MyoF is essential for vesicle transport and actin dynamics but HOW it worked biophysically was unclear.
100
Aoife Heaslip @atheaslip.bsky.social · 21/05/2026
First author Thomas Sladewski is opening his lab soon @UpstateCDBio – Positions available so contact him directly if you are interested in postdoc or research tech positions. journals.biologists.com/jcs/article/...
journals.biologists.com
First person – Thomas Sladewski
ABSTRACT. First Person is a series of interviews with the first authors of a selection of papers published in Journal of Cell Science, helping researchers promote themselves alongside their papers. Th...
131
Aoife Heaslip @atheaslip.bsky.social · 21/05/2026
Excited to highlight some exciting findings from our recent paper that uncovers how an unusual molecular motor, Myosin F, powers actin dynamics in Toxoplasma gondii. journals.biologists.com/jcs/article/...
journals.biologists.com
Molecular features of myosin F adapted for driving actin flows in Toxoplasma gondii
Highlighted Article: MyoF regulates actin organization in T. gondii by assembling into an oligomeric complex that contains multiple motor domains.
1239
Aoife Heaslip @atheaslip.bsky.social · 20/12/2024
Congrats to all on their success! Wishing you all a happy holiday and a great 2025.
010
Aoife Heaslip @atheaslip.bsky.social · 20/12/2024
Tom finished out the year with another publication, where he looked at the bending stiffness of Toxoplasma actin filaments. www.jbc.org/article/S002...
jbc.org
Bending stiffness of Toxoplasma gondii actin filaments
Actin is essential for the survival and pathogenicity of the Apicomplexan parasite Toxoplasma gondii, where it plays essential functions in cargo transport, invasion, egress, and organelle inheritance. Recent work has shown that, unlike vertebrate skeletal muscle actin, purified T. gondii actin filaments (TgAct1) can undergo rapid treadmilling, due to large differences in the barbed- and pointed-end critical concentrations, rapid subunit dissociation from filament ends, and a rapid nucleotide exchange rate constant from free monomers.
110
Aoife Heaslip @atheaslip.bsky.social · 20/12/2024
Also in October, Mike presented his work at ASTMH Annual Meeting in New Orleans
100
Aoife Heaslip @atheaslip.bsky.social · 20/12/2024
In October, undergrad Victoria Yi presented her work at the UConn Fall Frontiers Research Symposium
100
Aoife Heaslip @atheaslip.bsky.social · 20/12/2024
In July, postdoc Nick Hilton joined the lab. Welcome Nick! He is a brave soul who is tackling projects on both the cell bio and biophysics sides of the lab. Watch this space in 2025! 😊
100
Aoife Heaslip @atheaslip.bsky.social · 20/12/2024
Camille won a prize for her excellent poster!
100
Aoife Heaslip @atheaslip.bsky.social · 20/12/2024
Jacob gave a fantastic talk
100
Aoife Heaslip @atheaslip.bsky.social · 20/12/2024
In May Aoife, Jacob and Camille went to Germany for the International Congress on Toxoplasmosis.
100
Aoife Heaslip @atheaslip.bsky.social · 20/12/2024
In April, Aoife was awarded tenure at UConn
100
Aoife Heaslip @atheaslip.bsky.social · 20/12/2024
Later that week, Jacob’s paper was accepted to MBoC – Jacob show that a novel myosin motor is involved in actin organization in Toxoplasma www.molbiolcell.org/doi/10.1091/...
molbiolcell.org
Myosin F controls actin organization and dynamics in Toxoplasma gondii | Molecular Biology of the Cell
Intracellular cargo transport is a ubiquitous cellular process in all eukaryotes. In many cell types, membrane bound cargo is associated with molecular motors which transport cargo along microtubule a...
100
Aoife Heaslip @atheaslip.bsky.social · 20/12/2024
In March, Tom’s paper on Toxoplasma actin dynamics was published in Nature Communications. This was a great collaboration between the Heaslip Lab and the Kollman Lab at UofWashington www.nature.com/articles/s41...
nature.com
Toxoplasma gondii actin filaments are tuned for rapid disassembly and turnover - Nature Communications
Actin is critical to the survival of the parasite Toxoplasma gondii. In this study, Hvorecny and Sladewski et al. show that T. gondii actin forms intrinsically dynamic filaments in vitro due to differ...
100
Aoife Heaslip @atheaslip.bsky.social · 20/12/2024
In January two new students joined our group – Josh Berthiaume is a Ph.D student and Lee Dollar is a M.S student. They’ve already made great contributions and I’m excited to see where their projects go in 2025.
100
Aoife Heaslip @atheaslip.bsky.social · 20/12/2024
Before 2024 comes to a close, I want to celebrate the achievements of the folks in the lab. Here is the Heaslip Lab “Year in Review”
120