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Volume 56, Issue 1

OmcB protein is a surface-exposed glycosaminoglycan-dependent adhesin Free

Abstract

The OmcB protein of is a cysteine-rich outer membrane polypeptide with important functional, structural and antigenic properties. The entire gene encoding the OmcB protein from serovar LGV1 was cloned and expressed in and the full-length protein used to raise polyclonal antibodies. Recombinant OmcB was used to show that OmcB is a surface-exposed protein that functions as a chlamydial adhesin. Infectivity inhibition assays carried out using HeLa cells with serovar LGV1 in the presence of purified anti-OmcB serum showed inhibition of infectivity, suggesting that some of the OmcB was surface exposed. Moreover, using recombinant OmcB in infectivity inhibition assays resulted in 70 % inhibition of infectivity, confirming that OmcB plays a role as an adhesin in . Furthermore, recombinant OmcB protein bound to the surface of HeLa and Hec1B cells, but binding to glycosaminoglycan (GAG)-deficient cells (A-745 and D-677) was markedly reduced, indicating that OmcB binds to GAG-like receptors on host cells.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): COMC, chlamydial outer membrane complex , EB, elementary body , HS, heparan sulphate , MOMP, major outer membrane protein and MS/MS, mass spectrometry coupled to microcapillary liquid chromatography
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2007-01-01
2024-04-19
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Chlamydia trachomatis OmcB protein is a surface-exposed glycosaminoglycan-dependent adhesin
J. Med. Microbiol. 56, 15 (2007); https://doi.org/10.1099/jmm.0.46801-0
/content/journal/jmm/10.1099/jmm.0.46801-0
/content/journal/jmm/10.1099/jmm.0.46801-0
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