User profiles for A. E. Posey

Ammon E. Posey

Research Scientist, Washington University in St. Louis
Verified email at wustl.edu
Cited by 964

[HTML][HTML] A lethal de novo mutation in the middle domain of the dynamin-related GTPase Drp1 impairs higher order assembly and mitochondrial division

…, CM Manlandro, D Arnoult, J Stadler, AE Posey… - Journal of biological …, 2010 - ASBMB
Mitochondria dynamically fuse and divide within cells, and the proper balance of fusion and
fission is necessary for normal mitochondrial function, morphology, and distribution. Drp1 is …

Phase separation of intrinsically disordered proteins

AE Posey, AS Holehouse, RV Pappu - Methods in enzymology, 2018 - Elsevier
There is growing interest in the topic of intracellular phase transitions that lead to the
formation of biologically regulated biomolecular condensates. These condensates are …

[PDF][PDF] Arginine-enriched mixed-charge domains provide cohesion for nuclear speckle condensation

JA Greig, TA Nguyen, M Lee, AS Holehouse, AE Posey… - Molecular cell, 2020 - cell.com
Low-complexity protein domains promote the formation of various biomolecular condensates.
However, in many cases, the precise sequence features governing condensate formation …

Dilute phase oligomerization can oppose phase separation and modulate material properties of a ribonucleoprotein condensate

I Seim, AE Posey, WT Snead… - Proceedings of the …, 2022 - National Acad Sciences
Ribonucleoprotein bodies are exemplars of membraneless biomolecular condensates that
can form via spontaneous or driven phase transitions. The fungal protein Whi3 forms …

[HTML][HTML] Profilin reduces aggregation and phase separation of huntingtin N-terminal fragments by preferentially binding to soluble monomers and oligomers

AE Posey, KM Ruff, TS Harmon, SL Crick, A Li… - Journal of Biological …, 2018 - ASBMB
Huntingtin N-terminal fragments (Htt-NTFs) with expanded polyglutamine tracts form a range
of neurotoxic aggregates that are associated with Huntington's disease. Here, we show that …

Self-assembly of block heterochiral peptides into helical tapes

…, G Lokhande, AK Gaharwar, AE Posey… - Journal of the …, 2020 - ACS Publications
Patterned substitution of d-amino acids into the primary sequences of self-assembling
peptides influences molecular-level packing and supramolecular morphology. We report that …

[HTML][HTML] Dynamical control enables the formation of demixed biomolecular condensates

…, A Jalihal, MR King, JM Lalmansingh, AE Posey… - Nature …, 2023 - nature.com
Cellular matter can be organized into compositionally distinct biomolecular condensates.
For example, in Ashbya gossypii, the RNA-binding protein Whi3 forms distinct condensates …

Glycine-Rich Peptides from FUS Have an Intrinsic Ability to Self-Assemble into Fibers and Networked Fibrils: Published as part of the Biochemistry virtual special …

M Kar, AE Posey, F Dar, AA Hyman, RV Pappu - Biochemistry, 2021 - ACS Publications
Glycine-rich regions feature prominently in intrinsically disordered regions (IDRs) of proteins
that drive phase separation and the regulated formation of membraneless biomolecular …

Inhibition of amyloid beta fibril formation by monomeric human transthyretin

K Garai, AE Posey, X Li, JN Buxbaum… - Protein …, 2018 - Wiley Online Library
Transthyretin (TTR) is a homotetrameric protein that is found in the plasma and cerebrospinal
fluid. Dissociation of TTR tetramers sets off a downhill cascade of amyloid formation …

[HTML][HTML] Quantifying coexistence concentrations in multi-component phase-separating systems using analytical HPLC

A Bremer, AE Posey, MB Borgia, WM Borcherds… - Biomolecules, 2022 - mdpi.com
Over the last decade, evidence has accumulated to suggest that numerous instances of cellular
compartmentalization can be explained by the phenomenon of phase separation. This is …