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Bioscience

Engineering / synthetic biology

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Displaying 1 - 25 of 52

Using enantioselective biosensors to evolve asymmetric biocatalysts

January 30, 2025
Author(s)
d'Oelsnitz Simon, Wantae Kim, Haley Hardtke, Svetlana Ikonomova, Nina Alperovich, Olga Vasilyeva, Michael James, Eric Zigon, Charlie Johnson, Andrew Ellington, Quincey Justman, Michael Springer, Jessie Zhang, Pamela Silver, David Ross
Biocatalysts are championed for their exquisite stereochemistry, but slow chromatographic separations necessary to measure enantiomeric excess can bottleneck their development. Prokaryotic transcription factors can address this limitation by transducing

Plug-and-play protein biosensors using aptamer-regulated in vitro transcription

September 12, 2024
Author(s)
Heonjoon Lee, Tian Xie, Byunghwa Kang, Xinjie Yu, Samuel Schaffter, Rebecca Schulman
Molecular biosensors that accurately measure protein concentrations without external equipment are critical for solving numerous problems in diagnostics and therapeutics. Modularly transducing the binding of protein antibodies, protein switches or aptamers

High-throughput DNA engineering by mating bacteria

September 3, 2024
Author(s)
Takeshi Matsui, Po-Hsiang Hung, Han Mei, Xianan Liu, Fangfei Li, John Collins, Weiyi Li, Darach Miller, Neil Wilson, Esteban Toro, Geoffrey Taghon, Gavin Sherlock, Sasha Levy
To reduce the operational friction and scale DNA engineering, we report here an in vivo DNA assembly technology platform called SCRIVENER (Sequential Conjugation and Recombination for In Vivo Elongation of Nucleotides with low ERrors). SCRIVENER combines

Advances in Yeast Synthetic Biology for Human GPCR Biology and Pharmacology

July 29, 2024
Author(s)
Geoffrey Taghon, Nicholas Kapolka, Daniel Isom
G protein-coupled receptors (GPCRs) are the largest family of transmembrane receptors in humans. Over 800 GPCRs regulate the (patho)biology of every organ, tissue, and cell type. Consequently, GPCRs are the most prominent therapeutic targets in medicine

Mechanism of Action, Potency and Efficacy: Considerations for Cell and Gene Therapies

April 1, 2024
Author(s)
Carl Simon Jr., Anne L. Plant, Catherine Zander, Erich Bozenhardt, Christina Celluzzi, David Dobnik, Melanie Grant, John Hughes, Uma Lakshmipathy, Kok-Seong Lim, Laura Montgomery, Hesham Nawar, Thiana Nebel, Linda Peltier, James Sherley, Rouzbeh Taghizadeh, Eddie Tan, Sandrine Vessillier
One of the most challenging aspects of cell and gene therapy products (CGTPs) is defining mechanism of action (MOA), potency and efficacy of the product. This perspective examines these concepts and presents helpful ways to think about them through the

Ligify: Automated genome mining for ligand-inducible transcription factors

February 21, 2024
Author(s)
Simon d'Oelsnitz, Andrew Ellington, David J. Ross
Prokaryotic transcription factors can be repurposed into biosensors for the ligand-inducible control of gene expression, but the landscape of chemical ligands for which biosensors exist is extremely limited. To expand this landscape, we developed Ligify, a

Mechanical Regulation of Oral Epithelial Barrier Function

April 25, 2023
Author(s)
Eun Jin Lee, Paul Salipante, Anthony Kotula, Dana Graves, Stella Alimperti, Yoontae Kim
Epithelial cell function is modulated by mechanical forces imparted by the extracellular environment. The transmission of forces onto the cytoskeleton by modalities such as mechanical stress and matrix stiffness is necessary to address by the development

Fire Burn and Cauldron Bubble: What is in your Genome Editing Brew?

October 28, 2022
Author(s)
Simona Patange, Samantha Maragh
Genome editing is a rapidly evolving biotechnology with the potential to transform many sectors of industry such as agriculture, biomanufacturing, and medicine. This technology is enabled by an ever-growing portfolio of biomolecular reagents that span the

Effects of DNA Template Preparation on Variability in Cell-Free Protein Production

August 13, 2022
Author(s)
Eugenia Romantseva, Nina Alperovich, David Ross, Steven Lund, Elizabeth Strychalski
DNA templates for protein expression remain an unexplored source of variability in the performance of cell-free expression (CFE) systems for protein production. To characterize this variability, we investigated the effects of two common DNA extraction

Method for reproducible automated bacterial cell culture and measurement

August 8, 2022
Author(s)
David Ross, Peter Tonner, Olga Vasilyeva
Microbial cell culture is one of the most commonly performed protocols for synthetic biology, and laboratories are increasingly using 96-well plates and laboratory automation systems for cell culture. Here we describe a method for reproducible microbial

The allosteric landscape of the lac repressor

April 13, 2022
Author(s)
Drew S. Tack, Peter Tonner, Abe Pressman, Nathanael David Olson, Eugenia Romantseva, Nina Alperovich, Olga Vasilyeva, David J. Ross, Sasha F. Levy
Allostery is a fundamental biophysical mechanism where the activity of a biomolecule is regulated by the binding of a ligand. Despite playing a central role in many biological processes, a quantitative understanding of allostery is lacking. To

Cotranscriptionally encoded RNA strand displacement circuits

March 23, 2022
Author(s)
Samuel Schaffter, Elizabeth Strychalski
Engineered molecular circuits that process information in biological systems could address emerging human health and biomanufacturing needs. However, such circuits can be difficult to rationally design and scale. DNA-based strand displacement reactions

The NIH Somatic Cell Genome Editing program

April 7, 2021
Author(s)
Samantha Maragh
The move from reading to writing the human genome offers new opportunities to improve human health. The United States National Institutes of Health (NIH) Somatic Cell Genome Editing (SCGE) Consortium aims to accelerate the development of safer and more
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