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Published on: March 24, 2017
Mapping of serologically relevant regions of human cytomegalovirus phosphoprotein pp150 using synthetic peptides
1Department of Experimental Virology, Institute of Sera and Vaccines, Prague, Czechoslovakia.
Abstract:
The entire amino acid sequence of human cytomegalo-virus (HCMV) 150K matrix phosphoprotein (pp150), consisting of 1048 amino acid residues, was divided into 95 overlapping 20 amino acid peptides which were synthesized on polyethylene rods. The rods were subjected to ELISA with pooled anti-HCMV-positive and anti-HCMV-negative sera. Four peptides recognized by the anti-HCMV-positive pool only were synthesized by the solid-phase method and their reactivity in a conventional ELISA, using a panel of 14 individual anti-HCMV-negative and 20 anti-HCMV-positive antisera, was evaluated; three peptides were found to be specifically reactive. Results obtained with one of these peptides (residues 595 to 614) in ELISA showed a good correlation with those obtained using a routinely performed complement fixation test.
Insights
Researchers identified specific peptides from the human cytomegalovirus (HCMV) matrix phosphoprotein (pp150) that can be used for diagnostic testing. These findings advance the development of sensitive and specific HCMV diagnostic assays.
Area of Science:
- Virology
- Immunology
- Biochemistry
Background:
- Human cytomegalovirus (HCMV) is a significant pathogen, particularly in immunocompromised individuals.
- The 150K matrix phosphoprotein (pp150) is a key component of HCMV, and its antigenic properties are of diagnostic interest.
Purpose of the Study:
- To identify specific linear B-cell epitopes within the HCMV pp150 protein.
- To develop novel diagnostic tools for HCMV infection detection.
Main Methods:
- Synthesis of 95 overlapping 20-amino acid peptides from the entire HCMV pp150 sequence (1048 residues).
- Screening of synthesized peptides using enzyme-linked immunosorbent assay (ELISA) with pooled positive and negative human sera.
- Solid-phase synthesis and reactivity evaluation of specifically recognized peptides using a panel of individual human antisera.
Main Results:
- Four peptides were recognized by anti-HCMV-positive sera but not by anti-HCMV-negative sera.
- Three of these peptides demonstrated specific reactivity in conventional ELISA.
- One peptide (residues 595-614) showed high correlation with the complement fixation test results.
Conclusions:
- Specific reactive peptides derived from HCMV pp150 can serve as reliable targets for diagnostic assays.
- The identified peptides offer potential for developing improved diagnostic methods for HCMV infection.
- Peptide-based ELISA shows promise as an alternative to traditional methods like complement fixation for HCMV detection.
