This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.
Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.
1add
From Proteopedia
| |||||||
| , resolution 2.4Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | and | ||||||
| Activity: | Adenosine deaminase, with EC number 3.5.4.4 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
A PRE-TRANSITION STATE MIMIC OF AN ENZYME: X-RAY STRUCTURE OF ADENOSINE DEAMINASE WITH BOUND 1-DEAZA-ADENOSINE AND ZINC-ACTIVATED WATER
Overview
The refined 2.4-A structure of adenosine deaminase, recently discovered to be a zinc metalloenzyme [Wilson, D. K., Rudolph, F. B., & Quiocho, F. A. (1991) Science 252, 1278-1284], complexed with the ground-state analog 1-deazaadenosine shows the mode of binding of the analog and, unexpectedly, a zinc-activated water (hydroxide). This structure of a pre-transition-state mimic, combined with that previously determined for the complex with 6(R)-hydroxy-1,6-dihydropurine ribonucleoside, a nearly ideal transition-state analog, sheds new understanding of the precise stereospecificity and hydrolytic catalysis of an important and well-characterized member of a large group of zinc metalloenzymes. As both of these excellent mimics were generated in the active site, they demonstrate a powerful means of dissecting the course of an enzymatic reaction by direct crystallographic analysis.
About this Structure
1ADD is a Single protein structure of sequence from Mus musculus. Full crystallographic information is available from OCA.
Reference
A pre-transition-state mimic of an enzyme: X-ray structure of adenosine deaminase with bound 1-deazaadenosine and zinc-activated water., Wilson DK, Quiocho FA, Biochemistry. 1993 Feb 23;32(7):1689-94. PMID:8439534
Page seeded by OCA on Thu Mar 20 09:56:00 2008
