sncRNA-1 Is a Small Noncoding RNA Produced by Mycobacterium tuberculosis in Infected Cells That Positively Regulates Genes Coupled to Oleic Acid Biosynthesis
Nearly one third of the world’s population is infected with Mycobacterium tuberculosis (Mtb). While much work has focused on the role of different Mtb encoded proteins in pathogenesis, recent studies have revealed that Mtb also transcribes many noncoding RNAs whose functions remain poorly characteri...
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doaj-06e35103ef2d41e9bd53d7eb9f6e59902020-11-25T02:53:14ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2020-07-011110.3389/fmicb.2020.01631558277sncRNA-1 Is a Small Noncoding RNA Produced by Mycobacterium tuberculosis in Infected Cells That Positively Regulates Genes Coupled to Oleic Acid BiosynthesisFatma S. Coskun0Shashikant Srivastava1Prithvi Raj2Igor Dozmorov3Serkan Belkaya4Smriti Mehra5Nadia A. Golden6Allison N. Bucsan7Moti L. Chapagain8Edward K. Wakeland9Deepak Kaushal10Deepak Kaushal11Tawanda Gumbo12Nicolai S. C. van Oers13Nicolai S. C. van Oers14Nicolai S. C. van Oers15Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, United StatesCenter for Infectious Diseases Research and Experimental Therapeutics, Baylor Research Institute, Baylor University Medical Center, Dallas, TX, United StatesDepartment of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, United StatesDepartment of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, United StatesDepartment of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, United StatesTulane National Primate Research Center, School of Medicine, Tulane University, Covington, LA, United StatesTulane National Primate Research Center, School of Medicine, Tulane University, Covington, LA, United StatesTulane National Primate Research Center, School of Medicine, Tulane University, Covington, LA, United StatesCenter for Infectious Diseases Research and Experimental Therapeutics, Baylor Research Institute, Baylor University Medical Center, Dallas, TX, United StatesDepartment of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, United StatesTulane National Primate Research Center, School of Medicine, Tulane University, Covington, LA, United StatesTexas Biomedical Research Institute, San Antonio, TX, United StatesCenter for Infectious Diseases Research and Experimental Therapeutics, Baylor Research Institute, Baylor University Medical Center, Dallas, TX, United StatesDepartment of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, United StatesDepartment of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, United StatesDepartment of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, United StatesNearly one third of the world’s population is infected with Mycobacterium tuberculosis (Mtb). While much work has focused on the role of different Mtb encoded proteins in pathogenesis, recent studies have revealed that Mtb also transcribes many noncoding RNAs whose functions remain poorly characterized. We performed RNA sequencing and identified a subset of Mtb H37Rv-encoded small RNAs (<30 nts in length) that were produced in infected macrophages. Designated as smaller noncoding RNAs (sncRNAs), three of these predominated the read counts. Each of the three, sncRNA-1, sncRNA-6, and sncRNA-8 had surrounding sequences with predicted stable secondary RNA stem loops. Site-directed mutagenesis of the precursor sequences suggest the existence of a hairpin loop dependent RNA processing mechanism. A functional assessment of sncRNA-1 suggested that it positively regulated two mycobacterial transcripts involved in oleic acid biosynthesis. Complementary loss- and gain- of-function approaches revealed that sncRNA-1 positively supports Mtb growth and survival in nutrient-depleted cultures as well as in infected macrophages. Overall, the findings reveal that Mtb produces sncRNAs in infected cells, with sncRNA-1 modulating mycobacterial gene expression including genes coupled to oleic acid biogenesis.https://www.frontiersin.org/article/10.3389/fmicb.2020.01631/fullMycobacterium tuberculosissmall RNAsmiRNAsoleic acidgene regulation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Fatma S. Coskun Shashikant Srivastava Prithvi Raj Igor Dozmorov Serkan Belkaya Smriti Mehra Nadia A. Golden Allison N. Bucsan Moti L. Chapagain Edward K. Wakeland Deepak Kaushal Deepak Kaushal Tawanda Gumbo Nicolai S. C. van Oers Nicolai S. C. van Oers Nicolai S. C. van Oers |
spellingShingle |
Fatma S. Coskun Shashikant Srivastava Prithvi Raj Igor Dozmorov Serkan Belkaya Smriti Mehra Nadia A. Golden Allison N. Bucsan Moti L. Chapagain Edward K. Wakeland Deepak Kaushal Deepak Kaushal Tawanda Gumbo Nicolai S. C. van Oers Nicolai S. C. van Oers Nicolai S. C. van Oers sncRNA-1 Is a Small Noncoding RNA Produced by Mycobacterium tuberculosis in Infected Cells That Positively Regulates Genes Coupled to Oleic Acid Biosynthesis Frontiers in Microbiology Mycobacterium tuberculosis small RNAs miRNAs oleic acid gene regulation |
author_facet |
Fatma S. Coskun Shashikant Srivastava Prithvi Raj Igor Dozmorov Serkan Belkaya Smriti Mehra Nadia A. Golden Allison N. Bucsan Moti L. Chapagain Edward K. Wakeland Deepak Kaushal Deepak Kaushal Tawanda Gumbo Nicolai S. C. van Oers Nicolai S. C. van Oers Nicolai S. C. van Oers |
author_sort |
Fatma S. Coskun |
title |
sncRNA-1 Is a Small Noncoding RNA Produced by Mycobacterium tuberculosis in Infected Cells That Positively Regulates Genes Coupled to Oleic Acid Biosynthesis |
title_short |
sncRNA-1 Is a Small Noncoding RNA Produced by Mycobacterium tuberculosis in Infected Cells That Positively Regulates Genes Coupled to Oleic Acid Biosynthesis |
title_full |
sncRNA-1 Is a Small Noncoding RNA Produced by Mycobacterium tuberculosis in Infected Cells That Positively Regulates Genes Coupled to Oleic Acid Biosynthesis |
title_fullStr |
sncRNA-1 Is a Small Noncoding RNA Produced by Mycobacterium tuberculosis in Infected Cells That Positively Regulates Genes Coupled to Oleic Acid Biosynthesis |
title_full_unstemmed |
sncRNA-1 Is a Small Noncoding RNA Produced by Mycobacterium tuberculosis in Infected Cells That Positively Regulates Genes Coupled to Oleic Acid Biosynthesis |
title_sort |
sncrna-1 is a small noncoding rna produced by mycobacterium tuberculosis in infected cells that positively regulates genes coupled to oleic acid biosynthesis |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Microbiology |
issn |
1664-302X |
publishDate |
2020-07-01 |
description |
Nearly one third of the world’s population is infected with Mycobacterium tuberculosis (Mtb). While much work has focused on the role of different Mtb encoded proteins in pathogenesis, recent studies have revealed that Mtb also transcribes many noncoding RNAs whose functions remain poorly characterized. We performed RNA sequencing and identified a subset of Mtb H37Rv-encoded small RNAs (<30 nts in length) that were produced in infected macrophages. Designated as smaller noncoding RNAs (sncRNAs), three of these predominated the read counts. Each of the three, sncRNA-1, sncRNA-6, and sncRNA-8 had surrounding sequences with predicted stable secondary RNA stem loops. Site-directed mutagenesis of the precursor sequences suggest the existence of a hairpin loop dependent RNA processing mechanism. A functional assessment of sncRNA-1 suggested that it positively regulated two mycobacterial transcripts involved in oleic acid biosynthesis. Complementary loss- and gain- of-function approaches revealed that sncRNA-1 positively supports Mtb growth and survival in nutrient-depleted cultures as well as in infected macrophages. Overall, the findings reveal that Mtb produces sncRNAs in infected cells, with sncRNA-1 modulating mycobacterial gene expression including genes coupled to oleic acid biogenesis. |
topic |
Mycobacterium tuberculosis small RNAs miRNAs oleic acid gene regulation |
url |
https://www.frontiersin.org/article/10.3389/fmicb.2020.01631/full |
work_keys_str_mv |
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