Home FOR AUTHORS Acta Virologica 2019 Acta Virologica Vol.63, No.4, p.450-458, 2019

Journal info


Quarterly,
Founded: 1957
ISSN 0001-723X
E-ISSN 1336-2305

Published in English

Aims and Scope
Editorial Info

Abstracted and Indexed
Submission Guidelines

Select Journal







Webshop Cart

Your Cart is currently empty.

Info: Your browser does not accept cookies. To put products into your cart and purchase them you need to enable cookies.

Acta Virologica Vol.63, No.4, p.450-458, 2019

Title: Kinetic analysis of bacteriophage Sf6 binding to outer membrane protein a using whole virions
Author: N. B. HUBBS, M. M. WHISBY-PITTS, J. L. MCMURRY

Abstract: For successful infection, viruses must recognize their respective host cells. A common mechanism of host recognition by viruses is to utilize a portion of the host cell as a receptor. Bacteriophage Sf6, which infects Shigella flexneri, uses lipopolysaccharide as a primary receptor and then requires interaction with a secondary receptor, a role that can be fulfilled by either outer membrane proteins (Omp) A or C. Our previous work showed that specific residues in the loops of OmpA mediate Sf6 infection. To better understand Sf6 interactions with OmpA loop variants, we determined the kinetics of these interactions through the use of biolayer interferometry, an optical biosensing technique that yields data similar to surface plasmon resonance. Here, we successfully tethered whole Sf6 virions, determined the binding constant of Sf6 to OmpA to be 36 nM. Additionally, we showed that Sf6 bound to five variant OmpAs and the resulting kinetic parameters varied only slightly. Based on these data, we propose a model in which Sf6: Omp receptor recognition is not solely based on kinetics, but likely also on the ability of an Omp to induce a conformational change that results in productive infection.

Keywords: Sf6; Shigella flexneri; OmpA; biolayer interferometry
Published online: 12-Nov-2019
Year: 2019, Volume: 63, Issue: 4 Page From: 450, Page To: 458
doi:10.4149/av_2019_412


download file



© AEPress s.r.o
Copyright notice: For any permission to reproduce, archive or otherwise use the documents in the ELiS, please contact AEP.