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.


6rsa

From Proteopedia

(Difference between revisions)
Jump to: navigation, search
Line 1: Line 1:
-
[[Image:6rsa.gif|left|200px]]
+
{{Seed}}
 +
[[Image:6rsa.png|left|200px]]
<!--
<!--
Line 9: Line 10:
{{STRUCTURE_6rsa| PDB=6rsa | SCENE= }}
{{STRUCTURE_6rsa| PDB=6rsa | SCENE= }}
-
'''NUCLEAR MAGNETIC RESONANCE AND NEUTRON DIFFRACTION STUDIES OF THE COMPLEX OF RIBONUCLEASE*A WITH URIDINE VANADATE, A TRANSITION-STATE ANALOGUE'''
+
===NUCLEAR MAGNETIC RESONANCE AND NEUTRON DIFFRACTION STUDIES OF THE COMPLEX OF RIBONUCLEASE*A WITH URIDINE VANADATE, A TRANSITION-STATE ANALOGUE===
-
==Overview==
+
<!--
-
The complex of ribonuclease A (RNase A) with uridine vanadate (U-V), a transition-state analogue, has been studied with 51V and proton NMR spectroscopy in solution and by neutron diffraction in the crystalline state. Upon the addition of aliquots of U-V at pH 6.6, the C epsilon-H resonances of the two active-site histidine residues 119 and 12 decrease in intensity while four new resonances appear. Above pH 8 and below pH 5, these four resonances decrease in intensity as the complex dissociates. These four resonances are assigned to His-119 and His-12 in protonated and unprotonated forms in the RNase-U-V complex. These resonances do not titrate or change in relative area in the pH range 5-8, indicating a slow protonation process, and the extent of protonation remains constant with ca. 58% of His-12 and ca. 26% of His-119 being protonated. The results of diffraction studies show that both His-12 and His-119 occupy well-defined positions in the RNase-U-V complex and that both are protonated. However, while the classic interpretation of the mechanism of action of RNase based on the proposal of Findlay et al. [Findlay, D., Herries, D. G., Mathias, A. P., Rabin, B. R., &amp; Ross, C. A. (1962) Biochem. J. 85, 152-153] requires both His-12 and His-119 to be in axial positions relative to the pentacoordinate transition state, in the diffraction structure His-12 is found to be in an equatorial position, while Lys-41 is close to an axial position. Hydrogen exchange data show that the mobility and accessibility of amides in the RNase-U-V complex do not significantly differ from what was observed in the native enzyme. The results of both proton NMR in solution and neutron diffraction in the crystal are compared and interpreted in terms of the mechanism of action of RNase.
+
The line below this paragraph, {{ABSTRACT_PUBMED_4016100}}, adds the Publication Abstract to the page
 +
(as it appears on PubMed at http://www.pubmed.gov), where 4016100 is the PubMed ID number.
 +
-->
 +
{{ABSTRACT_PUBMED_4016100}}
==About this Structure==
==About this Structure==
Line 24: Line 28:
[[Category: Single protein]]
[[Category: Single protein]]
[[Category: Wlodawer, A.]]
[[Category: Wlodawer, A.]]
-
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 22:42:55 2008''
+
 
 +
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Jul 3 14:25:56 2008''

Revision as of 11:25, 3 July 2008

Image:6rsa.png

Template:STRUCTURE 6rsa

NUCLEAR MAGNETIC RESONANCE AND NEUTRON DIFFRACTION STUDIES OF THE COMPLEX OF RIBONUCLEASE*A WITH URIDINE VANADATE, A TRANSITION-STATE ANALOGUE

Template:ABSTRACT PUBMED 4016100

About this Structure

6RSA is a Single protein structure of sequence from Bos taurus. Full crystallographic information is available from OCA.

Reference

Nuclear magnetic resonance and neutron diffraction studies of the complex of ribonuclease A with uridine vanadate, a transition-state analogue., Borah B, Chen CW, Egan W, Miller M, Wlodawer A, Cohen JS, Biochemistry. 1985 Apr 9;24(8):2058-67. PMID:4016100

Page seeded by OCA on Thu Jul 3 14:25:56 2008

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6rsa"
Personal tools