1HE5

Human biliverdin IX beta reductase: NADP/Lumichrome ternary complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of Human Biliverdin Ix Beta Reductase, an Early Fetal Bilirubin Ix Producing Enzyme

Pereira, P.J.B.Macedo-Ribeiro, S.Parraga, A.Perez-Luque, R.Cunningham, O.Darcy, K.Mantle, T.J.Coll, M.

(2001) Nat.Struct.Mol.Biol. 8: 215

  • DOI: 10.1038/84948
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Biliverdin IXbeta reductase (BVR-B) catalyzes the pyridine nucleotide-dependent production of bilirubin-IXbeta, the major heme catabolite during early fetal development. BVR-B displays a preference for biliverdin isomers without propionates straddlin ...

    Biliverdin IXbeta reductase (BVR-B) catalyzes the pyridine nucleotide-dependent production of bilirubin-IXbeta, the major heme catabolite during early fetal development. BVR-B displays a preference for biliverdin isomers without propionates straddling the C10 position, in contrast to biliverdin IXalpha reductase (BVR-A), the major form of BVR in adult human liver. In addition to its tetrapyrrole clearance role in the fetus, BVR-B has flavin and ferric reductase activities in the adult. We have solved the structure of human BVR-B in complex with NADP+ at 1.15 A resolution. Human BVR-B is a monomer displaying an alpha/beta dinucleotide binding fold. The structures of ternary complexes with mesobiliverdin IValpha, biliverdin IXalpha, FMN and lumichrome show that human BVR-B has a single substrate binding site, to which substrates and inhibitors bind primarily through hydrophobic interactions, explaining its broad specificity. The reducible atom of both biliverdin and flavin substrates lies above the reactive C4 of the cofactor, an appropriate position for direct hydride transfer. BVR-B discriminates against the biliverdin IXalpha isomer through steric hindrance at the bilatriene side chain binding pockets. The structure also explains the enzyme's preference for NADP(H) and its B-face stereospecificity.


    Organizational Affiliation

    Instituto de Biologia Molecular de Barcelona, Consejo Superior de Investigaciones Científicas, Jordi Girona, 18-26, 08034 Barcelona, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BILIVERDIN IX BETA REDUCTASE
A
206Homo sapiensMutation(s): 0 
Gene Names: BLVRB (FLR)
EC: 1.5.1.30
Find proteins for P30043 (Homo sapiens)
Go to Gene View: BLVRB
Go to UniProtKB:  P30043
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
LUM
Query on LUM

Download SDF File 
Download CCD File 
A
LUMICHROME
7,8-DIMETHYLALLOXAZINE; 6,7-DIMETHYLALLOXAZINE
C12 H10 N4 O2
ZJTJUVIJVLLGSP-UHFFFAOYSA-N
 Ligand Interaction
NAP
Query on NAP

Download SDF File 
Download CCD File 
A
NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
2'-MONOPHOSPHOADENOSINE 5'-DIPHOSPHORIBOSE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.192 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 40.100α = 90.00
b = 49.200β = 90.00
c = 106.900γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
SHELXL-97refinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-02-28
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance