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M94A3172.TXT
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Document 3172
DOCN M94A3172
TI Expression of HTLV-I rex and tax recombinant proteins in E. coli.
DT 9412
AU Susova O; Pavlish O; Scherbak L; Gurtsevitch V; Cancer Research Center,
Moscow, Russia.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):137 (abstract no. PA0167). Unique
Identifier : AIDSLINE ICA10/94369403
AB OBJECTIVE: HTLV-I has been known to contain specific regulatory genes
rex and tax. The aim of the investigation was to obtain and to
characterize recombinant proteins encoded by these genes in bacterial
cells. METHODS: Routine gene-engeneering and biotechnological procedures
were used to accomplish molecular cloning for above purposes. Several
kind of expressing vectors were used including pATH, pEX as well as
pMAL-c and pMAL-p which were described elsewhere. RESULTS:
pMAL-c-derived plasmid clone expressing C-terminal part of p40-tax (167
aa residues) turned out to be the most perspective for both to generate
anti-tax rabbit polyclonal antibodies and to detect tax-specific
antibodies in human sera. Recombinant p21-rex hybrid protein which has
been expressed in pATH-vector system was low immunogenic and incapable
to detect rex-specific antibodies in human sera of HTLV-I carriers.
However, rabbit antiserum obtained against mentioned recombinant protein
was able to detect p21 cellular protein in HTLV-I-containing cell lines
(C 91/PL, MT-2, HVT-102). CONCLUSIONS: A new plasmid DNAs expressing
HTLV-I recombinant tax and rex proteins and generating appropriate
polyclonal anti-sera have been obtained. Immunoblot analysis allowed us
to demonstrate a moderate immune response to p40-tax in some cases with
no antibodies to HTLV-I structural proteins.
DE Cloning, Molecular/METHODS DNA, Viral/METABOLISM Gene Products,
rex/*BIOSYNTHESIS Gene Products, tax/*BIOSYNTHESIS Genes, pX Genetic
Vectors HTLV-I/GENETICS/*METABOLISM Plasmids Recombinant
Proteins/*BIOSYNTHESIS MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).