1
|
Simpson CA, Petersen BD, Haas NW, Geyman LJ, Lee AH, Podicheti R, Pepin R, Brown LC, Rusch DB, Manzella MP, Papenfort K, van Kessel JC. The quorum-sensing systems of Vibrio campbellii DS40M4 and BB120 are genetically and functionally distinct. Environ Microbiol 2021; 23:5412-5432. [PMID: 33998118 PMCID: PMC8458232 DOI: 10.1111/1462-2920.15602] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 05/13/2021] [Indexed: 11/28/2022]
Abstract
Vibrio campbellii BB120 (previously classified as Vibrio harveyi) is a fundamental model strain for studying quorum sensing in vibrios. A phylogenetic evaluation of sequenced Vibrio strains in Genbank revealed that BB120 is closely related to the environmental isolate V. campbellii DS40M4. We exploited DS40M4's competence for exogenous DNA uptake to rapidly generate greater than 30 isogenic strains with deletions of genes encoding BB120 quorum-sensing system homologues. Our results show that the quorum-sensing circuit of DS40M4 is distinct from BB120 in three ways: (i) DS40M4 does not produce an acyl homoserine lactone autoinducer but encodes an active orphan LuxN receptor, (ii) the quorum regulatory small RNAs (Qrrs) are not solely regulated by autoinducer signalling through the response regulator LuxO and (iii) the DS40M4 quorum-sensing regulon is much smaller than BB120 (~100 genes vs. ~400 genes, respectively). Using comparative genomics to expand our understanding of quorum-sensing circuit diversity, we observe that conservation of LuxM/LuxN proteins differs widely both between and within Vibrio species. These strains are also phenotypically distinct: DS40M4 exhibits stronger interbacterial cell killing, whereas BB120 forms more robust biofilms and is bioluminescent. These results underscore the need to examine wild isolates for a broader view of bacterial diversity in the marine ecosystem.
Collapse
Affiliation(s)
| | | | - Nicholas W Haas
- Department of Biology, Indiana University, Bloomington, IN, USA
| | - Logan J Geyman
- Department of Biology, Indiana University, Bloomington, IN, USA
| | - Aimee H Lee
- Department of Biology, Indiana University, Bloomington, IN, USA
| | - Ram Podicheti
- Centre for Genomics and Bioinformatics, Indiana University, Bloomington, IN, USA
| | - Robert Pepin
- Mass Spectrometry Facility, Indiana University, Bloomington, IN, USA
- Department of Chemistry, Indiana University, Bloomington, IN, USA
| | - Laura C Brown
- Department of Chemistry, Indiana University, Bloomington, IN, USA
| | - Douglas B Rusch
- Centre for Genomics and Bioinformatics, Indiana University, Bloomington, IN, USA
| | | | - Kai Papenfort
- Friedrich Schiller University, Institute of Microbiology, Jena, Germany
- Microverse Cluster, Friedrich Schiller University Jena, Jena, Germany
| | | |
Collapse
|
2
|
Affiliation(s)
- Kelsey Barrasso
- Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, Massachusetts, United States of America
- Program in Molecular Microbiology, Graduate School of Biomedical Sciences, Tufts University, Boston, Massachusetts, United States of America
| | - Samit Watve
- Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, Massachusetts, United States of America
| | - Chelsea A. Simpson
- Department of Biology, Indiana University, Bloomington, Indiana, United States of America
| | - Logan J. Geyman
- Department of Biology, Indiana University, Bloomington, Indiana, United States of America
| | - Julia C. van Kessel
- Department of Biology, Indiana University, Bloomington, Indiana, United States of America
- * E-mail: (JCVK); (WLN)
| | - Wai-Leung Ng
- Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, Massachusetts, United States of America
- Program in Molecular Microbiology, Graduate School of Biomedical Sciences, Tufts University, Boston, Massachusetts, United States of America
- * E-mail: (JCVK); (WLN)
| |
Collapse
|
3
|
Gorrell RE, Totten MH, Schoerning LJ, Newby JB, Geyman LJ, Lawless WG, Hum JM, Lowery JW. Identification of a bone morphogenetic protein type 2 receptor neutralizing antibody. BMC Res Notes 2019; 12:331. [PMID: 31186065 PMCID: PMC6558810 DOI: 10.1186/s13104-019-4367-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 06/05/2019] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE The bone morphogenetic protein (BMP) signaling pathway comprises the largest subdivision of the transforming growth factor (TGFβ) superfamily. BMP signaling plays essential roles in both embryonic development and postnatal tissue homeostasis. Dysregulated BMP signaling underlies human pathologies ranging from pulmonary arterial hypertension to heterotopic ossification. Thus, understanding the basic mechanisms and regulation of BMP signaling may yield translational opportunities. Unfortunately, limited tools are available to evaluate this pathway, and genetic approaches are frequently confounded by developmental requirements or ability of pathway components to compensate for one another. Specific inhibitors for type 2 receptors are poorly represented. Thus, we sought to identify and validate an antibody that neutralizes the ligand-binding function of BMP receptor type 2 (BMPR2) extracellular domain (ECD). RESULTS Using a modified, cell-free immunoprecipitation assay, we examined the neutralizing ability of the mouse monoclonal antibody 3F6 and found a dose-dependent inhibition of BMPR2-ECD ligand-binding. Consistent with this, 3F6 blocks endogenous BMPR2 function in the BMP-responsive cell line HEK293T. The specificity of 3F6 action was confirmed by demonstrating that this antibody has no effect on BMP-responsiveness in HEK293T cells in which BMPR2 expression is knocked-down. Our results provide important proof-of-concept data for future studies interrogating BMPR2 function.
Collapse
Affiliation(s)
- Ruthann E Gorrell
- Division of Biomedical Science, Marian University College of Osteopathic Medicine, 3200 Cold Spring Rd, Indianapolis, IN, 46222, USA
| | - Madeline H Totten
- Division of Biomedical Science, Marian University College of Osteopathic Medicine, 3200 Cold Spring Rd, Indianapolis, IN, 46222, USA
| | - Laura J Schoerning
- Division of Biomedical Science, Marian University College of Osteopathic Medicine, 3200 Cold Spring Rd, Indianapolis, IN, 46222, USA
| | - Jordan B Newby
- Division of Biomedical Science, Marian University College of Osteopathic Medicine, 3200 Cold Spring Rd, Indianapolis, IN, 46222, USA
| | - Logan J Geyman
- Division of Biomedical Science, Marian University College of Osteopathic Medicine, 3200 Cold Spring Rd, Indianapolis, IN, 46222, USA
| | - Warren G Lawless
- Division of Biomedical Science, Marian University College of Osteopathic Medicine, 3200 Cold Spring Rd, Indianapolis, IN, 46222, USA
| | - Julia M Hum
- Division of Biomedical Science, Marian University College of Osteopathic Medicine, 3200 Cold Spring Rd, Indianapolis, IN, 46222, USA
| | - Jonathan W Lowery
- Division of Biomedical Science, Marian University College of Osteopathic Medicine, 3200 Cold Spring Rd, Indianapolis, IN, 46222, USA.
| |
Collapse
|