PDBsum entry 2bsa

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Oxidoreductase PDB id
Protein chain
295 a.a. *
Waters ×279
* Residue conservation analysis
PDB id:
Name: Oxidoreductase
Title: Ferredoxin-NADP reductase (mutation: y 303 s) complexed with NADP
Structure: Ferredoxin-NADP reductase. Chain: a. Synonym: fnr. Engineered: yes. Mutation: yes
Source: Anabaena sp.. Organism_taxid: 1167. Strain: pcc7119. Expressed in: escherichia coli. Expression_system_taxid: 562
1.92Å     R-factor:   0.197     R-free:   0.219
Authors: C.M.Maya,J.A.Hermoso,I.Perez-Dorado,J.Tejero,M.M.Julvez, C.Gomez-Moreno,M.Medina
Key ref:
J.Tejero et al. (2005). C-terminal tyrosine of ferredoxin-NADP+ reductase in hydride transfer processes with NAD(P)+/H. Biochemistry, 44, 13477-13490. PubMed id: 16216071 DOI: 10.1021/bi051278c
20-May-05     Release date:   19-Oct-05    
Go to PROCHECK summary

Protein chain
Pfam   ArchSchema ?
P21890  (FENR_ANASO) -  Ferredoxin--NADP reductase
440 a.a.
295 a.a.*
Key:    PfamA domain  Secondary structure  CATH domain
* PDB and UniProt seqs differ at 3 residue positions (black crosses)

 Gene Ontology (GO) functional annotation 
  GO annot!
  Biological process     oxidation-reduction process   1 term 
  Biochemical function     oxidoreductase activity     1 term  


DOI no: 10.1021/bi051278c Biochemistry 44:13477-13490 (2005)
PubMed id: 16216071  
C-terminal tyrosine of ferredoxin-NADP+ reductase in hydride transfer processes with NAD(P)+/H.
J.Tejero, I.Pérez-Dorado, C.Maya, M.Martínez-Júlvez, J.Sanz-Aparicio, C.Gómez-Moreno, J.A.Hermoso, M.Medina.
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 FNR variants from the cyanobacterium Anabaena in which the C-terminal Tyr has been replaced by Trp, Phe, or Ser have been produced.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.

Literature references that cite this PDB file's key reference

  PubMed id Reference
20878669 H.Komori, D.Seo, T.Sakurai, and Y.Higuchi (2010).
Crystal structure analysis of Bacillus subtilis ferredoxin-NADP(+) oxidoreductase and the structural basis for its substrate selectivity.
  Protein Sci, 19, 2279-2290.
PDB codes: 3lzw 3lzx
19583767 D.J.Stuehr, J.Tejero, and M.M.Haque (2009).
Structural and mechanistic aspects of flavoproteins: electron transfer through the nitric oxide synthase flavoprotein domain.
  FEBS J, 276, 3959-3974.  
19583765 M.Medina (2009).
Structural and mechanistic aspects of flavoproteins: photosynthetic electron transfer from photosystem I to NADP+.
  FEBS J, 276, 3942-3958.  
18279389 M.A.Musumeci, A.K.Arakaki, D.V.Rial, D.L.Catalano-Dupuy, and E.A.Ceccarelli (2008).
Modulation of the enzymatic efficiency of ferredoxin-NADP(H) reductase by the amino acid volume around the catalytic site.
  FEBS J, 275, 1350-1366.  
16766617 A.Velazquez-Campoy, G.Goñi, J.R.Peregrina, and M.Medina (2006).
Exact analysis of heterotropic interactions in proteins: Characterization of cooperative ligand binding by isothermal titration calorimetry.
  Biophys J, 91, 1887-1904.  
The most recent references are shown first. Citation data come partly from CiteXplore and partly from an automated harvesting procedure. Note that this is likely to be only a partial list as not all journals are covered by either method. However, we are continually building up the citation data so more and more references will be included with time. Where a reference describes a PDB structure, the PDB codes are shown on the right.