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.

2bsa

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 02:23, 11 September 2015

FERREDOXIN-NADP REDUCTASE (MUTATION: Y 303 S) COMPLEXED WITH NADP

Structural highlights

2bsa is a 1 chain structure with sequence from Anabaena sp.. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	1b2r, 1bjk, 1bqe, 1e62, 1e63, 1e64, 1ewy, 1gjr, 1go2, 1gr1, 1h42, 1h85, 1ogi, 1ogj, 1qgy, 1qgz, 1qh0, 1que, 1quf, 1w34, 1w35, 1w87, 2bmw
Activity:	Ferredoxin--NADP(+) reductase, with EC number 1.18.1.2
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Ferredoxin-NADP+ reductase (FNR) catalyzes the reduction of NADP+ to NADPH in an overall reversible reaction, showing some differences in the mechanisms between cyanobacterial and higher plant FNRs. During hydride transfer it is proposed that the FNR C-terminal Tyr is displaced by the nicotinamide. Thus, this C-terminal Tyr might be involved not only in modulating the flavin redox properties, as already shown, but also in nicotinamide binding and hydride transfer. FNR variants from the cyanobacterium Anabaena in which the C-terminal Tyr has been replaced by Trp, Phe, or Ser have been produced. All FNR variants show enhanced NADP+ and NAD+ binding, especially Tyr303Ser, which correlates with a noticeable improvement of NADH-dependent reactions. Nevertheless, the Tyr303Ser variant shows a decrease in the steady-state kcat value with NADPH. Fast kinetic analysis of the hydride transfer shows that the low efficiency observed for this mutant FNR under steady-state conditions is not due to a lack of catalytic ability but rather to the strong enzyme-coenzyme interaction. Three-dimensional structures for Tyr303Ser and Tyr303Trp variants and its complexes with NADP+ show significant differences between plant and cyanobacterial FNRs. Our results suggest that modulation of coenzyme affinity is highly influenced by the strength of the C-terminus-FAD interaction and that subtle changes between plant and cyanobacterial structures are able to modify the energy of that interaction. Additionally, it is shown that the C-terminal Tyr of FNR lowers the affinity for NADP+/H to levels compatible with steady-state turnover during the catalytic cycle, but it is not involved in the hydride transfer itself.

C-terminal tyrosine of ferredoxin-NADP+ reductase in hydride transfer processes with NAD(P)+/H.,Tejero J, Perez-Dorado I, Maya C, Martinez-Julvez M, Sanz-Aparicio J, Gomez-Moreno C, Hermoso JA, Medina M Biochemistry. 2005 Oct 18;44(41):13477-90. PMID:16216071^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Tejero J, Perez-Dorado I, Maya C, Martinez-Julvez M, Sanz-Aparicio J, Gomez-Moreno C, Hermoso JA, Medina M. C-terminal tyrosine of ferredoxin-NADP+ reductase in hydride transfer processes with NAD(P)+/H. Biochemistry. 2005 Oct 18;44(41):13477-90. PMID:16216071 doi:10.1021/bi051278c

1 Structural highlights
2 Evolutionary Conservation
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2bsa"

@@ Line 6: / Line 6: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1b2r|1b2r]], [[1bjk|1bjk]], [[1bqe|1bqe]], [[1e62|1e62]], [[1e63|1e63]], [[1e64|1e64]], [[1ewy|1ewy]], [[1gjr|1gjr]], [[1go2|1go2]], [[1gr1|1gr1]], [[1h42|1h42]], [[1h85|1h85]], [[1ogi|1ogi]], [[1ogj|1ogj]], [[1qgy|1qgy]], [[1qgz|1qgz]], [[1qh0|1qh0]], [[1que|1que]], [[1quf|1quf]], [[1w34|1w34]], [[1w35|1w35]], [[1w87|1w87]], [[2bmw|2bmw]]</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Ferredoxin--NADP(+)_reductase Ferredoxin--NADP(+) reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.18.1.2 1.18.1.2] </span></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2bsa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bsa OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2bsa RCSB], [http://www.ebi.ac.uk/pdbsum/2bsa PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2bsa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bsa OCA], [http://pdbe.org/2bsa PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2bsa RCSB], [http://www.ebi.ac.uk/pdbsum/2bsa PDBsum]</span></td></tr>
 </table>
 == Evolutionary Conservation ==
@@ Line 26: / Line 26: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 2bsa" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>

2bsa

From Proteopedia

Revision as of 02:23, 11 September 2015

FERREDOXIN-NADP REDUCTASE (MUTATION: Y 303 S) COMPLEXED WITH NADP

Structural highlights

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox