Discovery of Three Toxic Proteins of Klebsiella Phage fHe-Kpn01

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http://hdl.handle.net/10138/318916

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Spruit , C , Wicklund , A , Wan , X , Skurnik , M & Pajunen , M 2020 , ' Discovery of Three Toxic Proteins of Klebsiella Phage fHe-Kpn01 ' , Viruses-Basel , vol. 12 , no. 5 , 544 . https://doi.org/10.3390/v12050544

Title: Discovery of Three Toxic Proteins of Klebsiella Phage fHe-Kpn01
Author: Spruit, Cindy; Wicklund, Anu; Wan, Xing; Skurnik, Mikael; Pajunen, Maria
Contributor: University of Helsinki, Department of Microbiology
University of Helsinki, Medicum
University of Helsinki, Glycoscience Group
Date: 2020
Language: eng
Number of pages: 16
Belongs to series: Viruses-Basel
ISSN: 1999-4915
URI: http://hdl.handle.net/10138/318916
Abstract: The lytic phage, fHe-Kpn01 was isolated from sewage water using an extended-spectrum beta-lactamase-producing strain of Klebsiella pneumoniae as a host. The genome is 43,329 bp in size and contains direct terminal repeats of 222 bp. The genome contains 56 predicted genes, of which proteomics analysis detected 29 different proteins in purified phage particles. Comparison of fHe-Kpn01 to other phages, both morphologically and genetically, indicated that the phage belongs to the family Podoviridae and genus Drulisvirus. Because fHe-Kpn01 is strictly lytic and does not carry any known resistance or virulence genes, it is suitable for phage therapy. It has, however, a narrow host range since it infected only three of the 72 tested K. pneumoniae strains, two of which were of capsule type KL62. After annotation of the predicted genes based on the similarity to genes of known function and proteomics results on the virion-associated proteins, 22 gene products remained annotated as hypothetical proteins of unknown function (HPUF). These fHe-Kpn01 HPUFs were screened for their toxicity in Escherichia coli. Three of the HPUFs, encoded by the genes g10, g22, and g38, were confirmed to be toxic.
Subject: 1182 Biochemistry, cell and molecular biology
bacteriophage
Podoviridae
Drulisvirus
hypothetical proteins of unknown function
toxic proteins
antibiotic resistance
antibiotics
Klebsiella pneumoniae
capsule type
CCA-ADDING ENZYME
TRANSFER-RNA
ESCHERICHIA-COLI
DNA
IDENTIFICATION
COMPLEXES
CLASSIFICATION
SURVEILLANCE
EXPRESSION
MECHANISM
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