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Three polypeptides screened from phage display random peptide library may be the receptor polypeptide of Mycoplasma

Xiangying Deng1, Youcong Zhu1, Pei Dai1

  • 1Institute of Pathogenic Biology, Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, PR China.

Microbial Pathogenesis
|May 1, 2018
PubMed

Insights

Researchers identified three key peptide sequences that may act as receptors for Mycoplasma genitalium adhesion protein (MgPa). This finding advances understanding of MgPa function and M. genitalium pathogenesis in genitourinary tract diseases.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Biochemistry

Background:

  • Mycoplasma genitalium adhesion protein (MgPa) is crucial for M. genitalium adherence to host cells, contributing to genitourinary tract diseases.
  • The specific receptor peptides or proteins for MgPa remain largely unidentified, hindering a full understanding of its function.

Purpose of the Study:

  • To investigate three previously screened polypeptides as potential receptor peptides for MgPa.
  • To elucidate the interaction between MgPa and these synthesized peptides.
  • To explore the role of these peptides in M. genitalium adherence to host cells.

Main Methods:

  • Artificial synthesis of three candidate receptor polypeptides.
  • Indirect enzyme-linked immunosorbent assay (ELISA) to assess binding between recombinant MgPa (rMgPa) and synthesized polypeptides.
  • Indirect immunofluorescence microscopy (IFM) to confirm interactions and adherence.
  • In vitro adherence assays using SV-HUC-1 cells, with inhibition studies using anti-rMgPa antibody and synthesized polypeptides.

Main Results:

  • Recombinant MgPa specifically bound to the three synthesized polypeptides.
  • The synthesized polypeptides and anti-rMgPa antibody partially inhibited the adherence of rMgPa and M. genitalium to SV-HUC-1 cells.
  • Confirmed in vitro adherence of rMgPa and M. genitalium to SV-HUC-1 cells.

Conclusions:

  • The three synthesized polypeptides are identified as potential essential receptor peptides for MgPa.
  • These findings contribute to understanding MgPa's biological function and the pathogenic mechanisms of M. genitalium.
  • This research may offer new targets for therapeutic interventions against M. genitalium infections.
Keywords:
MgPaMycoplasma genitaliumReceptor polypeptidesSV-HUC-1 cells

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