A genome-wide cytotoxicity screen of cluster F1 mycobacteriophage Girr reveals novel inhibitors of Mycobacterium smegmatis growth

Abstract Over the past decade, thousands of bacteriophage genomes have been sequenced and annotated. A striking observation from this work is that known structural features and functions cannot be assigned for >65% of the encoded proteins. One approach to begin experimentally elucidating the func...

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Veröffentlicht in:G3 : genes - genomes - genetics 2024-05, Vol.14 (5)
Hauptverfasser: Pollenz, Richard S, Barnhill, Kaylee, Biggs, Abbigail, Bland, Jackson, Carter, Victoria, Chase, Michael, Clark, Hayley, Coleman, Caitlyn, Daffner, Marshall, Deam, Caitlyn, Finocchiaro, Alyssa, Franco, Vanessa, Fuller, Thomas, Pinera, Juan Gallardo, Horne, Mae, Howard, Zoe, Kanahan, Olivia, Miklaszewski, Christopher, Miller, Sydney, Morgan, Ryan, Onalaja, Oluwatobi, Otero, Louis, Padhye, Shivani, Rainey, Emily, Rasul, Fareed, Robichaux, Kobe, Rodier, Alexandra, Schlosser, Sydni, Sciacchitano, Ava, Stewart, Emma, Thakkar, Rajvi, Heller, Danielle M
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container_issue 5
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container_title G3 : genes - genomes - genetics
container_volume 14
creator Pollenz, Richard S
Barnhill, Kaylee
Biggs, Abbigail
Bland, Jackson
Carter, Victoria
Chase, Michael
Clark, Hayley
Coleman, Caitlyn
Daffner, Marshall
Deam, Caitlyn
Finocchiaro, Alyssa
Franco, Vanessa
Fuller, Thomas
Pinera, Juan Gallardo
Horne, Mae
Howard, Zoe
Kanahan, Olivia
Miklaszewski, Christopher
Miller, Sydney
Morgan, Ryan
Onalaja, Oluwatobi
Otero, Louis
Padhye, Shivani
Rainey, Emily
Rasul, Fareed
Robichaux, Kobe
Rodier, Alexandra
Schlosser, Sydni
Sciacchitano, Ava
Stewart, Emma
Thakkar, Rajvi
Heller, Danielle M
description Abstract Over the past decade, thousands of bacteriophage genomes have been sequenced and annotated. A striking observation from this work is that known structural features and functions cannot be assigned for >65% of the encoded proteins. One approach to begin experimentally elucidating the function of these uncharacterized gene products is genome-wide screening to identify phage genes that confer phenotypes of interest like inhibition of host growth. This study describes the results of a screen evaluating the effects of overexpressing each gene encoded by the temperate Cluster F1 mycobacteriophage Girr on the growth of the host bacterium Mycobacterium smegmatis. Overexpression of 29 of the 102 Girr genes (~28% of the genome) resulted in mild to severe cytotoxicity. Of the 29 toxic genes described, 12 have no known function and are predominately small proteins of
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A striking observation from this work is that known structural features and functions cannot be assigned for &gt;65% of the encoded proteins. One approach to begin experimentally elucidating the function of these uncharacterized gene products is genome-wide screening to identify phage genes that confer phenotypes of interest like inhibition of host growth. This study describes the results of a screen evaluating the effects of overexpressing each gene encoded by the temperate Cluster F1 mycobacteriophage Girr on the growth of the host bacterium Mycobacterium smegmatis. Overexpression of 29 of the 102 Girr genes (~28% of the genome) resulted in mild to severe cytotoxicity. Of the 29 toxic genes described, 12 have no known function and are predominately small proteins of &lt;125 amino acids. Overexpression of the majority of these 12 cytotoxic no known functions proteins resulted in moderate to severe growth reduction and represent novel antimicrobial products. The remaining 17 toxic genes have predicted functions, encoding products involved in phage structure, DNA replication/modification, DNA binding/gene regulation, or other enzymatic activity. Comparison of this dataset with prior genome-wide cytotoxicity screens of mycobacteriophages Waterfoul and Hammy reveals some common functional themes, though several of the predicted Girr functions associated with cytotoxicity in our report, including genes involved in lysogeny, have not been described previously. 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The remaining 17 toxic genes have predicted functions, encoding products involved in phage structure, DNA replication/modification, DNA binding/gene regulation, or other enzymatic activity. Comparison of this dataset with prior genome-wide cytotoxicity screens of mycobacteriophages Waterfoul and Hammy reveals some common functional themes, though several of the predicted Girr functions associated with cytotoxicity in our report, including genes involved in lysogeny, have not been described previously. 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subjects Genome, Viral
Mutant Screen Report
Mycobacteriophages - genetics
Mycobacterium smegmatis - virology
Viral Proteins - genetics
Viral Proteins - metabolism
title A genome-wide cytotoxicity screen of cluster F1 mycobacteriophage Girr reveals novel inhibitors of Mycobacterium smegmatis growth
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