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M9620357.TXT
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1996-02-26
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Document 0357
DOCN M9620357
TI Glycosylation-dependent peptide antigenic determinants of env gp46
HTLV-1.
DT 9602
AU Kaumaya PT; Conrad SF; DiGeorge AM; Lairmore MD; Department of
Obstetrics & Gynecology, College of Medicine, Ohio; State University,
Columbus 43210, USA.
SO Leukemia. 1995 Oct;9 Suppl 1:S133-8. Unique Identifier : AIDSLINE
MED/96022238
AB Human T-lymphotropic virus type 1 (HTLV-I) is a retrovirus associated
with adult T-cell leukemia/lymphoma, and the virus infection constitutes
a growing public health problem. In a continuing effort to engineer
conformationally dependent HTLV-I epitopes that elicit a protective
immune response, we have examined the role and functional importance of
carbohydrate moieties in specific immune recognition and antibody
responses. There have been several reports of the importance of N-linked
virus glycosylation in the formation of neutralizing antibodies.
Residues 230-257 is predicted to encode two beta-turn/loop regions at
240-244 (LYGPN), 248-257 (VPSSSSTPL) and a glycosylation site at N-244
(NVS). We have successfully engineered and synthesized the 233-253
sequence of gp46 of HTLV-1 with and without GlcNAC at Asn244. Circular
dichroism spectroscopy and proton NMR showed the presence of beta-turn
conformation in both peptide constructs. Chimeras of the glycosylated
and non-glycosylated epitope with promiscuous T-cell epitope were
synthesized and shown to elicit high titered antibodies in rabbits
specific for the immunogen (SC1MVF and SC2MVF) and the B cell epitope
233-253. Additionally, antibodies to the glycosylated form of the
peptide recognized the HTLV-I envelope precursor in radioimmunoassay
precipitation assay and react with HTLV-I whole virus preparations in
ELISA.
DE Adult Amino Acid Sequence Animal Antibodies Antibody Formation
Enzyme-Linked Immunosorbent Assay Epitopes/*ANALYSIS/CHEMISTRY Gene
Products, env/*BIOSYNTHESIS/GENETICS/*IMMUNOLOGY Genes, env
Glycopeptides/CHEMISTRY/IMMUNOLOGY/ISOLATION & PURIF Glycosylation
Human HTLV-I/*GENETICS/*IMMUNOLOGY/ISOLATION & PURIF Leukemia,
T-Cell/*IMMUNOLOGY Molecular Sequence Data Nuclear Magnetic Resonance
Peptide Fragments/CHEMISTRY/CHEMICAL SYNTHESIS/ISOLATION & PURIF
Rabbits/IMMUNOLOGY Retroviridae Proteins,
Oncogenic/*BIOSYNTHESIS/GENETICS/ *IMMUNOLOGY Support, U.S. Gov't,
P.H.S. JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).