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Discovery and Biochemical Characterization of PlyP56, PlyN74, and PlyTB40—Bacillus Specific Endolysins

Three Bacillus bacteriophage-derived endolysins, designated PlyP56, PlyN74, and PlyTB40, were identified, cloned, purified, and characterized for their antimicrobial properties. Sequence alignment reveals these endolysins have an N-terminal enzymatically active domain (EAD) linked to a C-terminal ce...

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Autores principales: Etobayeva, Irina, Linden, Sara B., Alem, Farhang, Harb, Laith, Rizkalla, Lucas, Mosier, Philip D., Johnson, Allison A., Temple, Louise, Hakami, Ramin M., Nelson, Daniel C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5977269/
https://www.ncbi.nlm.nih.gov/pubmed/29883383
http://dx.doi.org/10.3390/v10050276
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author Etobayeva, Irina
Linden, Sara B.
Alem, Farhang
Harb, Laith
Rizkalla, Lucas
Mosier, Philip D.
Johnson, Allison A.
Temple, Louise
Hakami, Ramin M.
Nelson, Daniel C.
author_facet Etobayeva, Irina
Linden, Sara B.
Alem, Farhang
Harb, Laith
Rizkalla, Lucas
Mosier, Philip D.
Johnson, Allison A.
Temple, Louise
Hakami, Ramin M.
Nelson, Daniel C.
author_sort Etobayeva, Irina
collection PubMed
description Three Bacillus bacteriophage-derived endolysins, designated PlyP56, PlyN74, and PlyTB40, were identified, cloned, purified, and characterized for their antimicrobial properties. Sequence alignment reveals these endolysins have an N-terminal enzymatically active domain (EAD) linked to a C-terminal cell wall binding domain (CBD). PlyP56 has a Peptidase_M15_4/VanY superfamily EAD with a conserved metal binding motif and displays biological dependence on divalent ions for activity. In contrast, PlyN74 and PlyTB40 have T7 lysozyme-type Amidase_2 and carboxypeptidase T-type Amidase_3 EADs, respectively, which are members of the MurNAc-LAA superfamily, but are not homologs and thus do not have a shared protein fold. All three endolysins contain similar SH3-family CBDs. Although minor host range differences were noted, all three endolysins show relatively broad antimicrobial activity against members of the Bacillus cereus sensu lato group with the highest lytic activity against B. cereus ATCC 4342. Characterization studies determined the optimal lytic activity for these enzymes was at physiological pH (pH 7.0–8.0), over a broad temperature range (4–55 °C), and at low concentrations of NaCl (<50 mM). Direct comparison of lytic activity shows the PlyP56 enzyme to be twice as effective at lysing the cell wall peptidoglycan as PlyN74 or PlyTB40, suggesting PlyP56 is a good candidate for further antimicrobial development as well as bioengineering studies.
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spelling pubmed-59772692018-06-01 Discovery and Biochemical Characterization of PlyP56, PlyN74, and PlyTB40—Bacillus Specific Endolysins Etobayeva, Irina Linden, Sara B. Alem, Farhang Harb, Laith Rizkalla, Lucas Mosier, Philip D. Johnson, Allison A. Temple, Louise Hakami, Ramin M. Nelson, Daniel C. Viruses Article Three Bacillus bacteriophage-derived endolysins, designated PlyP56, PlyN74, and PlyTB40, were identified, cloned, purified, and characterized for their antimicrobial properties. Sequence alignment reveals these endolysins have an N-terminal enzymatically active domain (EAD) linked to a C-terminal cell wall binding domain (CBD). PlyP56 has a Peptidase_M15_4/VanY superfamily EAD with a conserved metal binding motif and displays biological dependence on divalent ions for activity. In contrast, PlyN74 and PlyTB40 have T7 lysozyme-type Amidase_2 and carboxypeptidase T-type Amidase_3 EADs, respectively, which are members of the MurNAc-LAA superfamily, but are not homologs and thus do not have a shared protein fold. All three endolysins contain similar SH3-family CBDs. Although minor host range differences were noted, all three endolysins show relatively broad antimicrobial activity against members of the Bacillus cereus sensu lato group with the highest lytic activity against B. cereus ATCC 4342. Characterization studies determined the optimal lytic activity for these enzymes was at physiological pH (pH 7.0–8.0), over a broad temperature range (4–55 °C), and at low concentrations of NaCl (<50 mM). Direct comparison of lytic activity shows the PlyP56 enzyme to be twice as effective at lysing the cell wall peptidoglycan as PlyN74 or PlyTB40, suggesting PlyP56 is a good candidate for further antimicrobial development as well as bioengineering studies. MDPI 2018-05-21 /pmc/articles/PMC5977269/ /pubmed/29883383 http://dx.doi.org/10.3390/v10050276 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Etobayeva, Irina
Linden, Sara B.
Alem, Farhang
Harb, Laith
Rizkalla, Lucas
Mosier, Philip D.
Johnson, Allison A.
Temple, Louise
Hakami, Ramin M.
Nelson, Daniel C.
Discovery and Biochemical Characterization of PlyP56, PlyN74, and PlyTB40—Bacillus Specific Endolysins
title Discovery and Biochemical Characterization of PlyP56, PlyN74, and PlyTB40—Bacillus Specific Endolysins
title_full Discovery and Biochemical Characterization of PlyP56, PlyN74, and PlyTB40—Bacillus Specific Endolysins
title_fullStr Discovery and Biochemical Characterization of PlyP56, PlyN74, and PlyTB40—Bacillus Specific Endolysins
title_full_unstemmed Discovery and Biochemical Characterization of PlyP56, PlyN74, and PlyTB40—Bacillus Specific Endolysins
title_short Discovery and Biochemical Characterization of PlyP56, PlyN74, and PlyTB40—Bacillus Specific Endolysins
title_sort discovery and biochemical characterization of plyp56, plyn74, and plytb40—bacillus specific endolysins
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5977269/
https://www.ncbi.nlm.nih.gov/pubmed/29883383
http://dx.doi.org/10.3390/v10050276
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