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.


1ogj

From Proteopedia

(Difference between revisions)
Jump to: navigation, search
Line 1: Line 1:
-
[[Image:1ogj.gif|left|200px]]
+
{{Seed}}
 +
[[Image:1ogj.png|left|200px]]
<!--
<!--
Line 9: Line 10:
{{STRUCTURE_1ogj| PDB=1ogj | SCENE= }}
{{STRUCTURE_1ogj| PDB=1ogj | SCENE= }}
-
'''FERREDOXIN:NADP+ REDUCTASE MUTANT WITH LEU 263 REPLACED BY PRO (L263P)'''
+
===FERREDOXIN:NADP+ REDUCTASE MUTANT WITH LEU 263 REPLACED BY PRO (L263P)===
-
==Overview==
+
<!--
-
Previous studies indicated that the determinants of coenzyme specificity in ferredoxin-NADP+ reductase (FNR) from Anabaena are situated in the 2'-phosphate (2'-P) NADP+ binding region, and also suggested that other regions must undergo structural rearrangements of the protein backbone during coenzyme binding. Among the residues involved in such specificity could be those located in regions where interaction with the pyrophosphate group of the coenzyme takes place, namely loops 155-160 and 261-268 in Anabaena FNR. In order to learn more about the coenzyme specificity determinants, and to better define the structural basis of coenzyme binding, mutations in the pyrophosphate and 2'-P binding regions of FNR have been introduced. Modification of the pyrophosphate binding region, involving residues Thr-155, Ala-160, and Leu-263, indicates that this region is involved in determining coenzyme specificity and that selected alterations of these positions produce FNR enzymes that are able to bind NAD+. Thus, our results suggest that slightly different structural rearrangements of the backbone chain in the pyrophosphate binding region might determine FNR specificity for the coenzyme. Combined mutations at the 2'-P binding region, involving residues Ser-223, Arg-224, Arg-233, and Tyr-235, in combination with the residues mentioned above in the pyrophosphate binding region have also been carried out in an attempt to increase the FNR affinity for NAD+/H. However, in most cases the analyzed mutants lost the ability for NADP+/H binding and electron transfer, and no major improvements were observed with regard to the efficiency of the reactions with NAD+/H. Therefore, our results confirm that determinants for coenzyme specificity in FNR are also situated in the pyrophosphate binding region and not only in the 2'-P binding region. Such observations also suggest that other regions of the protein, yet to be identified, might also be involved in this process.
+
The line below this paragraph, {{ABSTRACT_PUBMED_14500716}}, adds the Publication Abstract to the page
 +
(as it appears on PubMed at http://www.pubmed.gov), where 14500716 is the PubMed ID number.
 +
-->
 +
{{ABSTRACT_PUBMED_14500716}}
==About this Structure==
==About this Structure==
Line 34: Line 38:
[[Category: Nadp reductase]]
[[Category: Nadp reductase]]
[[Category: Oxidoreductase]]
[[Category: Oxidoreductase]]
-
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 03:49:02 2008''
+
 
 +
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 20:33:43 2008''

Revision as of 17:33, 28 July 2008

Image:1ogj.png

Template:STRUCTURE 1ogj

FERREDOXIN:NADP+ REDUCTASE MUTANT WITH LEU 263 REPLACED BY PRO (L263P)

Template:ABSTRACT PUBMED 14500716

About this Structure

1OGJ is a Single protein structure of sequence from Anabaena sp.. Full crystallographic information is available from OCA.

Reference

Involvement of the pyrophosphate and the 2'-phosphate binding regions of ferredoxin-NADP+ reductase in coenzyme specificity., Tejero J, Martinez-Julvez M, Mayoral T, Luquita A, Sanz-Aparicio J, Hermoso JA, Hurley JK, Tollin G, Gomez-Moreno C, Medina M, J Biol Chem. 2003 Dec 5;278(49):49203-14. Epub 2003 Sep 18. PMID:14500716

Page seeded by OCA on Mon Jul 28 20:33:43 2008

Proteopedia Page Contributors and Editors (what is this?)

OCA

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