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Over the past ten years there has been increasing interest in the conjugation of exogenous compounds to the surface of the M13 bacteriophage. M13 offers a convenient scaffold for the development of nanoassemblies with useful functions, such as highly specific drug delivery and pathogen detection. However, the progress of these technologies has been hindered by the limited efficiency of conjugation to the bacteriophage. Here we generate a mutant version of M13 with an additional lysine residue expressed on the outer surface of the M13 major coat protein, pVIII. We show that this mutation is accommodated by the bacteriophage and that up to an additional 520 exogenous groups can be attached to the bacteriophage surface via amine-directed conjugation. These results could aid the development of high payload drug delivery nanoassemblies and pathogen detection systems with increased sensitivity.
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http://dx.doi.org/10.1021/acs.bioconjchem.8b00307 | DOI Listing |
Biophys J
September 2025
Biophysical and Biomedical Measurement Group, Microsystems and Nanotechnology Division, Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA. Electronic address:
Macromolecular structure is central to biology. Yet, not all biomolecules have a well-defined fold. Intrinsically disordered regions are ubiquitous, conveying a versatility to function even in otherwise folded structures.
View Article and Find Full Text PDFAdv Mater
September 2025
Department of Chemical Engineering, McGill University, 3610 University Street, Montréal, QC, H3A 0C5, Canada.
Naturally conductive protein nanowires have inspired efforts to engineer electrical conductivity into synthetic fibrous proteins for the development of bioelectronic materials and devices. A comprehensive analysis of charge transport in these systems requires a combination of various measurement methods, instruments and electrode designs. Measurements under direct current (DC) typically focus on charge transport without distinguishing between charged species, requiring alternating current (AC) and electrochemical methods to probe additional phenomena.
View Article and Find Full Text PDFJ Immunother Cancer
August 2025
TATUM bioscience, Sherbrooke, Quebec, Canada.
Background: Checkpoint inhibitors revolutionized cancer treatment by potentiating antitumor immune responses. However, many patients do not respond to these therapies, often due to the lack of a pre-existing immune response against cancer cells. Developing immunotherapies that promote cancer-cell antigen recognition, and the initiation of antitumor immune responses could thus improve response rates.
View Article and Find Full Text PDFNano Converg
August 2025
Humanoid Olfactory Display Innovation Research Center, Pusan National University, Busan, 46241, Republic of Korea.
Unlabelled: Olfactory display systems, designed to replicate the human sense of smell, rely on gas sensors that are fast, selective, and reliable. From this perspective, this review highlights recent progress in sensing materials and integration strategies that enable room-temperature operation, rapid response and recovery, and closed-loop control for realistic odor delivery. Advances are classified into three categories: organic, inorganic, and hybrid systems.
View Article and Find Full Text PDFAdv Mater
August 2025
The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
Nanovaccines co-assemble antigens and adjuvants to elicit robust immune responses but often require complex synthesis and post-modification procedures. Here, a programmable nanovaccine platform based on the M13 bacteriophage is developed for the scalable production of vaccines and single-step modular engineering of adjuvanticity, length, and antigen density. By reprogramming the sequence and size of the noncoding phage genome, the Toll-like receptor 9 activation and the length of the phage are precisely controlled.
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