New Frontier in Single-Molecule Detection: Polypeptides in Nanopore Sensors

David P. Hoogerheide
Photo Submitted

David P. Hoogerheide

The Department of Physics in the J. William Fulbright College of Arts and Sciences presents its Physics Colloquium, titled "A new frontier in single-molecule detection: polypeptides in nanopore sensors" by David P. Hoogerheide of the National Institute of Standards and Technology. The lecture will be from 4-5 p.m. Friday, March 9, in PHYS 133. Refreshments will begin at 3:30 p.m. in PHYS 134.

The talk highlights the motion of charged biomolecules across membranes has significant consequences for technology, for biology and medicine, and for the biophysics and physical chemistry of biomolecule/membrane association. Technologically, DNA motion through nanopores is the central mechanism for nanopore-based sequencing technologies.

From a medical perspective, movement of native proteins across membranes is critical for normal cellular functioning, while therapeutic peptides must be designed to target and penetrate diseased cells. And from a more fundamental view, a thin pore is the simplest possible way to confine a single polymer. The next frontier in nanopore-based detection is the study of heterogeneously charged molecules such as block copolymers or polypeptides.

In this talk, Hoogerheide will demonstrate how the complexity of a heterogeneously charged polypeptide can be leveraged experimentally to observe translocation success at the single-molecule level. The experimental results will be matched to simple stochastic dynamical models. Along the way, we will discover new approaches to studying polypeptides with nanopores, new tools for predictive modeling of experimental observations, and a new assay for studying the binding of polypeptides to lipid membranes on the single-molecule level.

Contacts

Paula Prescott, fiscal support specialist
Department of Physics
479-575-5836, prescott@uark.edu

Headlines

The World as a Classroom: The Executive M.B.A. Program at U of A

The program, offered through the Sam M. Walton College of Business, blends online learning with face-to-face interaction and applied studies in a real-time international immersion trip.

Keri Blakinger, Author of 'Corrections in Ink,' to Speak at Fayetteville Public Library April 22

Blakinger, an award-winning journalist now at the Los Angeles Times, will talk about her memoir and her work as a reporter at 6 p.m. April 22 at the Fayetteville Public Library's Walker Community Room.

Visit With University Libraries and Pat Walker Health Center's Medical Services at Carnival Today

Employees are invited to meet fellow workers from units across campus including the University Libraries and the Pat Walker Health Center at today's Making Your Day Work Carnival at the Arkansas Union.

Farewell Reception April 3 for Fulbright College's Lisa Summerford

The campus community is invited to celebrate Summerford's achievements and to wish her well during a drop-in retirement reception from 3:30-5 p.m. Wednesday, April 3, in the Fulbright College Dean's Office in Old Main 523.

Rachel McGathy Retiring After 25 Years

There will be a reception to celebrate McGathy's retirement from 2:30-4:30 p.m. Friday, March 29, in the downstairs breakroom at Uptown East.

News Daily