home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Software Vault: The Diamond Collection
/
The Diamond Collection (Software Vault)(Digital Impact).ISO
/
cdr16
/
med9505d.zip
/
M9550824.TXT
< prev
next >
Wrap
Text File
|
1995-03-25
|
3KB
|
43 lines
Document 0824
DOCN M9550824
TI The structure of unliganded reverse transcriptase from the human
immunodeficiency virus type 1.
DT 9505
AU Rodgers DW; Gamblin SJ; Harris BA; Ray S; Culp JS; Hellmig B; Woolf DJ;
Debouck C; Harrison SC; Department of Molecular and Cellular Biology,
Harvard University,; Cambridge, MA 02138.
SO Proc Natl Acad Sci U S A. 1995 Feb 14;92(4):1222-6. Unique Identifier :
AIDSLINE MED/95166801
AB The crystal structure of the reverse transcriptase (RT) from the type 1
human immunodeficiency virus has been determined at 3.2-A resolution.
Comparison with complexes between RT and the polymerase inhibitor
Nevirapine [Kohlstaedt, L.A., Wang, J., Friedman, J.M., Rice, P.A. &
Steitz, T.A. (1992) Science 256, 1783-1790] and between RT and an
oligonucleotide [Jacobo-Molina, A., Ding, J., Nanni, R., Clark, A. D.,
Lu, X., Tantillo, C., Williams, R. L., Kamer, G., Ferris, A. L., Clark,
P., Hizi, A., Hughes, S. H. & Arnold, E. (1993) Proc. Natl. Acad. Sci.
USA 90, 6320-6324] reveals changes associated with ligand binding. The
enzyme is a heterodimer (p66/p51), with domains labeled fingers, thumb,
palm, and connection in both subunits, and a ribonuclease H domain in
the larger subunit only. The most striking difference between RT and
both complex structures is the change in orientation of the p66 thumb
(approximately 33 degrees rotation). Smaller shifts relative to the core
of the molecule were also found in other domains, including the p66
fingers and palm, which contain the polymerase active site. Within the
polymerase catalytic region itself, there are no rearrangements between
RT and the RT/DNA complex. In RT/Nevirapine, the drug binds in the p66
palm near the polymerase active site, a region that is well-packed
hydrophobic core in the unliganded enzyme. Room for the drug is provided
by movement of a small beta-sheet within the palm domain of the
Nevirapine complex. The rearrangement within the palm and thumb, as well
as domain shifts relative to the enzyme core, may prevent correct
placement of the oligonucleotide substrate when the drug is bound.
DE Binding Sites Crystallography, X-Ray DNA-Binding Proteins/CHEMISTRY
HIV-1/*ENZYMOLOGY Protein Conformation Pyridines/CHEMISTRY Reverse
Transcriptase/ANTAGONISTS & INHIB/*CHEMISTRY Support, Non-U.S. Gov't
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).