alexa Low Discrimination of Charged Silica Particles at T4 Phage Surfaces
ISSN: 2090-4967

Biosensors Journal
Open Access

OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations

700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

Research Article

Low Discrimination of Charged Silica Particles at T4 Phage Surfaces

Madiha F. Khan1, Hanjiang Dong2, Yang Chen2 and Michael A. Brook1,2*

1Department of Biomedical Engineering, McMaster University, Canada

2Department of Chemistry and Chemical Biology, McMaster University, Canada

Corresponding Author:
Brook MA
Department of Chemistry
McMaster University
1280 Main St. W., Hamilton
Ontario, L8S 4M1, Canada
Tel: (905) 525- 9140 23483
Fax: (905) 522-2509
E-mail: [email protected]

Received Date: June 19, 2015; Accepted Date: September 07, 2015; Published Date: September 09, 2015

Citation: Khan MF, Dong H, Chen Y, Brook MA (2015) Low Discrimination of Charged Silica Particles at T4 Phage Surfaces. Biosens J 4:125. doi:10.4172/2090-4967.1000125

Copyright: © 2015 Khan MF, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



Bacteriophages have a variety of interesting properties that can be exploited in biological assays, including high binding specificity for the identification of bioactive molecules, and particularly, their capacity to propagate via bacterial lysis. However, the development of phage-based assays and disinfection devices is hampered by ineffective methods to stabilize and orient the phage in active form. For example, T4 phage, which has an anionic head and cationic tail, binds targets using its tail fibers, hence the adsorption of their tails to a substrate during immobilization, limits the ability of T4 to bind targets. Previously, we demonstrated that T4 phage retains infectivity despite adsorption to large silica particles of anionic or cationic charge. In an effort to better understand this phenomenon, we have instead used silica nanoparticles – much smaller than the phage – to probe the locus of preferential adsorption. Silica nanoparticles (NPs) (10 and 30 nm) were synthesized from tetraethoxysilane (TEOS) using the Stöber process. Charged particles were prepared by mixing appropriate silica dispersions with the cationic polyelectrolyte (PDADMAC), leading to both negative (zeta potential (ζ < -10) and positively charged (ζ > +10) silica surfaces. These particles were mixed with 1.5 × 1010 pfu/ mL T4 (model) phage and analyzed by transmission electron microscopy (TEM). Results show that regardless of the particle concentration, both positively and negatively charged 30 nm particles bind effectively to both head and tail, with a slight preference for the head. No difference between NP associations to head or tail was seen with 10 nm particles, possibly because of their lower charge surface density and smaller size, which can accommodate small features on the phage surface better. The high hydrophilicity of silica facilitates maintenance of phage hydration and, likely, phage mobility, such that orientation is less important for bacterial binding in this system.


Share This Page

Additional Info

Loading Please wait..
Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri, Food, Aqua and Veterinary Science Journals

Dr. Krish

[email protected]

1-702-714-7001 Extn: 9040

Clinical and Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals


[email protected]

1-702-714-7001Extn: 9042

Chemical Engineering and Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001 Extn: 9040

Earth & Environmental Sciences

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

General Science and Health care Journals

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics and Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001 Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Informatics Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Material Sciences Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Mathematics and Physics Journals

Jim Willison

[email protected]

1-702-714-7001 Extn: 9042

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001 Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

John Behannon

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

[email protected]

1-702-714-7001 Extn: 9042

© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version