Volume 130, Issue 3 pp. 181-192
Original Article

Protein O-mannosyltransferase Rv1002c contributes to low cell permeability, biofilm formation in vitro, and mycobacterial survival in mice

Shufeng Yang

Shufeng Yang

Department of Microbiology, College of Basic Medical Sciences, Dalian Medical University, Dalian, China

These authors have contributed equally to this work.

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Shaoguang Sui

Shaoguang Sui

Department of Emergency, The Second Hospital of Dalian Medical University, Dalian, China

These authors have contributed equally to this work.

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Yuanhua Qin

Yuanhua Qin

Department of Parasitology, College of Basic Medical Sciences, Dalian Medical University, Dalian, China

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Haibo Chen

Haibo Chen

Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China

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Shanshan Sha

Shanshan Sha

Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Dalian Medical University, Dalian, China

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Xin Liu

Xin Liu

Department of Microbiology, College of Basic Medical Sciences, Dalian Medical University, Dalian, China

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Guoying Deng

Corresponding Author

Guoying Deng

Department of Microbiology, College of Basic Medical Sciences, Dalian Medical University, Dalian, China

Guoying Deng, Department of Microbiology, College of Basic Medical Sciences, Dalian Medical University, Dalian, China. e-mail: [email protected] and Yufang Ma, Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Dalian Medical University, Dalian, China. e-mail: [email protected]

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Yufang Ma

Corresponding Author

Yufang Ma

Department of Microbiology, College of Basic Medical Sciences, Dalian Medical University, Dalian, China

Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Dalian Medical University, Dalian, China

Guoying Deng, Department of Microbiology, College of Basic Medical Sciences, Dalian Medical University, Dalian, China. e-mail: [email protected] and Yufang Ma, Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Dalian Medical University, Dalian, China. e-mail: [email protected]

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First published: 03 January 2022
Citations: 1

Abstract

Mycobacterium tuberculosis (M. tuberculosis) Rv1002c encodes the protein O-mannosyltransferase (PMT), which catalyzes the transfer of mannose to serine or threonine residues of proteins. We explored the function of PMT in vitro and in vivo. Rv1002c protein was heterogeneously overexpressed in nonpathogenic Mycobacterium smegmatis (named as MS_Rv1002c). A series of trials including mass spectrometry, transmission electron microscope, biofilm formation and antibiotics susceptibility were performed to explore the function of PMT on bacterial survival in vitro. Mouse experiments were carried out to evaluate the virulence of PMT in vivo. PMT decreased the cell envelope permeability and promoted microbial biofilm formation. PMT enhanced the mycobacterial survival in vivo and inhibited the release of pro-inflammatory cytokines in serum. The function might be associated with an increased abundance of some mannoproteins in culture filtrate (CF). PMT is likely to be involved in mycobacterial survival both in vivo and in vitro due to increasing the mannoproteins abundance in CF.

CONFLICT OF INTEREST

The authors declared no conflict of interest.

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