Human Cytomegalovirus Structural Proteins: Immune Reaction Against Pp150 Synthetic Peptides

Overview

Journal J Clin Microbiol

Specialty Microbiology

Date 1991 Sep 1

PMID 1723077

Citations 8

Authors

M P Landini

A Ripalti

K Sra

P Pouletty

Affiliations

Soon will be listed here.

Abstract

In the present study, several peptides of the major structural antigen (pp150) of human cytomegalovirus (CMV) have been chemically synthesized and tested by a modified slot blotting procedure for their ability to bind CMV-specific immunoglobulin G (IgG) and IgM present in human sera. The sequences of the peptides were deduced on the basis of either (i) their presence in a fusion protein already known to be frequently recognized by human antibody or (ii) their high content of hydrophilic amino acids as deduced from the published nucleotide sequence. An important IgM-binding epitope was found to be located in the last 38 amino acids at the carboxy terminus of the molecule. This region reacts with anti-CMV IgM present in the great majority (83.3%) of IgM-positive human sera, and adsorption experiments have shown that IgM titers to the entire pp150 decrease 25 to 50% in most sera previously absorbed with this region. The overall results obtained endorse the continued synthesis of other sequences in order to define a group of peptides sensitive and specific enough to replace the virus and infected cells as an antigenic substrate in the serological evaluation of anti-CMV antibody.

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