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M9460676.TXT
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1994-06-25
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Document 0676
DOCN M9460676
TI Inhibition of human immunodeficiency virus type 1 reverse transcriptase
dimerization using synthetic peptides derived from the connection
domain.
DT 9408
AU Divita G; Restle T; Goody RS; Chermann JC; Baillon JG; Max-Planck
Institut fur Medizinische Forschung, Abteilung; Biophysik, Heidelberg,
Federal Republic of Germany.
SO J Biol Chem. 1994 May 6;269(18):13080-3. Unique Identifier : AIDSLINE
MED/94230400
AB Based on presently available information on the structure of human
immunodeficiency virus type 1 (HIV-1) reverse transcriptase, peptides
have been synthesized which correspond to the sequence of a particular
region of the protein involved in formation of the active heterodimeric
form of the enzyme. Several peptides that are 15-19 amino acids long and
that are derived from the so-called connection domain of the reverse
transcriptase are able to inhibit dimerization of the enzyme and thus
inhibit development of its enzymatic activities. In particular, a
tryptophan-rich 19-mer corresponding to residues 389-407 was relatively
efficient, showing an apparent dissociation constant in the micromolar
range for one or both of the subunits. The sequence of this region is
identical for both subunits, since one (molecular mass of 51 kDa) is the
proteolytic product of the other (molecular mass of 66 kDa).
Dissociation of the preformed heterodimer could not be induced by the
peptides, but increasing concentrations reduced the rate of dimerization
in a concentration-dependent manner until it became immeasurable at high
concentrations. The results suggest that inhibition of dimerization of
reverse transcriptase is an attractive approach to chemotherapeutic
intervention in HIV infection and that further development of
peptide-based inhibition strategies is worth pursuing.
DE Amino Acid Sequence Antiviral Agents/CHEMICAL SYNTHESIS/*PHARMACOLOGY
Binding, Competitive Cell Line HIV-1/DRUG
EFFECTS/*ENZYMOLOGY/PHYSIOLOGY Molecular Sequence Data Peptide
Fragments/CHEMICAL SYNTHESIS/*PHARMACOLOGY Polymers Reverse
Transcriptase/*ANTAGONISTS & INHIB/METABOLISM Support, Non-U.S. Gov't
Virus Replication/DRUG EFFECTS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).