home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Arsenal Files 6
/
The Arsenal Files 6 (Arsenal Computer).ISO
/
health
/
med9605a.zip
/
M9650027.TXT
< prev
next >
Wrap
Text File
|
1996-03-09
|
2KB
|
35 lines
Document 0027
DOCN M9650027
TI HIV-1 protease specificity derived from a complex mixture of synthetic
substrates.
DT 9605
AU Kassel DB; Green MD; Wehbie RS; Swanstrom R; Berman J; Glaxo-Wellcome
Research Institute, Research Triangle Park, North; Carolina 27709, USA.
SO Anal Biochem. 1995 Jul 1;228(2):259-66. Unique Identifier : AIDSLINE
MED/96171046
AB A rapid and semiquantitative method is described for determining the
relative kcat/Km for individual peptides in defined substrate mixtures.
The method utilizes electrospray ionization/mass spectrometry alone to
semiquantitatively determine relative peptide substrate turnover rates.
Unlike previous studies, in which chromatographic separation of
individual peptide species was required, this mass spectrometric-based
method relies strictly on the ability to ionize and detect
simultaneously all peptide species in a defined mixture. Differences in
the ion intensities of the individual components before and after
incubation with protease are used to semiquantitatively determine
preferred substrates. This method was used to the identify preferred
peptide substrates for HIV-1 protease. Optimal substrates were
identified from a defined synthetic peptide substrate mixture based on
Ser-Gln-Asn-Tyr-Pro-Ile-Val, where the P1' proline was substituted with
20 naturally occurring amino acids. The hydrophobic residues Leu, Ile,
Val, Phe, and Tyr were preferred in addition to Pro at the P1' site. The
results were corroborated by performing the more laborious
HPLC/Frit-fast atom bombardment/MS analyses.
DE Amino Acid Sequence HIV Protease/*METABOLISM Mass Fragmentography
Molecular Sequence Data Molecular Weight Substrate Specificity
Support, U.S. Gov't, P.H.S. Time Factors JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).