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.


1xb8

From Proteopedia

(Difference between revisions)
Jump to: navigation, search
Line 1: Line 1:
-
[[Image:1xb8.jpg|left|200px]]
+
{{Seed}}
 +
[[Image:1xb8.png|left|200px]]
<!--
<!--
Line 9: Line 10:
{{STRUCTURE_1xb8| PDB=1xb8 | SCENE= }}
{{STRUCTURE_1xb8| PDB=1xb8 | SCENE= }}
-
'''Zn substituted form of D62C/K74C double mutant of Pseudomonas Aeruginosa Azurin'''
+
===Zn substituted form of D62C/K74C double mutant of Pseudomonas Aeruginosa Azurin===
-
==Overview==
+
<!--
-
Identification and evaluation of factors important for thermostability in proteins is a growing research field with many industrial applications. This study investigates the effects of introducing a novel disulfide bond and engineered electrostatic interactions with respect to the thermostability of holo azurin from Pseudomonas aeruginosa. Four mutants were selected on the basis of rational design and novel temperature-dependent atomic displacement factors from crystal data collected at elevated temperatures. The atomic displacement parameters describe the molecular movement at higher temperatures. The thermostability was evaluated by optical spectroscopy as well as by differential scanning calorimetry. Although azurin has a high inherent stability, the introduction of a novel disulfide bond connecting a flexible loop with small alpha-helix (D62C/K74C copper-containing mutant), increased the T(m) by 3.7 degrees C compared with the holo protein. Furthermore, three mutants were designed to introduce electrostatic interactions, K24R, D23E/K128R, and D23E/K128R/K24R. Mutant K24R stabilizes loops between two separate beta-strands and D23E/K128R was selected to stabilize the C-terminus of azurin. Furthermore, D23E/K128R/K24R was selected to reflect the combination of the electrostatic interactions in D23E/K128R and K24R. The mutants involving electrostatic interactions had a minor effect on the thermostability. The crystal structures of the copper-containing mutants D62C/K74C and K24R have been determined to 1.5 and 1.8 A resolution. In addition the crystal structure of the zinc-loaded mutant D62C/K74C has also been completed to 1.8 A resolution. These structures support the selected design and provide valuable information for evaluating effects of the modifications on the thermostability of holo azurin.
+
The line below this paragraph, {{ABSTRACT_PUBMED_15449946}}, adds the Publication Abstract to the page
 +
(as it appears on PubMed at http://www.pubmed.gov), where 15449946 is the PubMed ID number.
 +
-->
 +
{{ABSTRACT_PUBMED_15449946}}
==About this Structure==
==About this Structure==
Line 34: Line 38:
[[Category: Mutant]]
[[Category: Mutant]]
[[Category: Thermostability]]
[[Category: Thermostability]]
-
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 14:48:23 2008''
+
 
 +
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 16:40:12 2008''

Revision as of 13:40, 27 July 2008

Image:1xb8.png

Template:STRUCTURE 1xb8

Zn substituted form of D62C/K74C double mutant of Pseudomonas Aeruginosa Azurin

Template:ABSTRACT PUBMED 15449946

About this Structure

1XB8 is a Single protein structure of sequence from Pseudomonas aeruginosa. Full crystallographic information is available from OCA.

Reference

Effects of a novel disulfide bond and engineered electrostatic interactions on the thermostability of azurin., Tigerstrom A, Schwarz F, Karlsson G, Okvist M, Alvarez-Rua C, Maeder D, Robb FT, Sjolin L, Biochemistry. 2004 Oct 5;43(39):12563-74. PMID:15449946

Page seeded by OCA on Sun Jul 27 16:40:12 2008

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1xb8"
Personal tools