3KRB

Structure of Aldose Reductase from Giardia Lamblia at 1.75A Resolution

• PDB DOI: https://doi.org/10.2210/pdb3KRB/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Giardia lamblia ATCC 50803
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2009-11-18 Released: 2009-12-01 
• Deposition Author(s): Seattle Structural Genomics Center for Infectious Disease (SSGCID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.173 
• R-Value Work: 0.144 
• R-Value Observed: 0.145 

Literature

Structure of aldose reductase from Giardia lamblia.

Ferrell, M., Abendroth, J., Zhang, Y., Sankaran, B., Edwards, T.E., Staker, B.L., Van Voorhis, W.C., Stewart, L.J., Myler, P.J.

(2011) Acta Crystallogr Sect F Struct Biol Cryst Commun 67: 1113-1117

• PubMed: 21904059 
• DOI: https://doi.org/10.1107/S1744309111030879
• Primary Citation of Related Structures:  
  3KRB


• PubMed Abstract: 
  

  Giardia lamblia is an anaerobic aerotolerant eukaryotic parasite of the intestines. It is believed to have diverged early from eukarya during evolution and is thus lacking in many of the typical eukaryotic organelles and biochemical pathways. Most conspicuously, mitochondria and the associated machinery of oxidative phosphorylation are absent; instead, energy is derived from substrate-level phosphorylation. Here, the 1.75 Å resolution crystal structure of G. lamblia aldose reductase heterologously expressed in Escherichia coli is reported. As in other oxidoreductases, G. lamblia aldose reductase adopts a TIM-barrel conformation with the NADP(+)-binding site located within the eight β-strands of the interior.

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Organizational Affiliation: 

Seattle Structural Genomics Center for Infectious Disease, USA. [e-mail]

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 77.21 kDa 
• Atom Count: 5,675 
• Modelled Residue Count: 614 
• Deposited Residue Count: 668 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Aldose reductase	A, B	334	Giardia lamblia ATCC 50803	Mutation(s): 0  Gene Names: GL50803_7260 EC: 1.1.1.21
UniProt
Find proteins for A8BGX6 (Giardia intestinalis (strain ATCC 50803 / WB clone C6)) Explore A8BGX6  Go to UniProtKB:  A8BGX6

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAP	C [auth A], G [auth B]	NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE C21 H28 N7 O17 P3 XJLXINKUBYWONI-NNYOXOHSSA-N
EDO	E [auth A], F [auth B]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
UNX	D [auth A], H [auth B]	UNKNOWN ATOM OR ION X

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.173 
• R-Value Work: 0.144 
• R-Value Observed: 0.145 
• Space Group: C 1 2 1
• Diffraction Data: https://doi.org/10.18430/M33KRB

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 196.77	α = 90
b = 66.09	β = 92.26
c = 56.29	γ = 90

Software Package:

Software Name	Purpose
BOS	data collection
PHASER	phasing
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-12-01 
Deposition Author(s): Seattle Structural Genomics Center for Infectious Disease (SSGCID)

Revision History  

• Version 1.0: 2009-12-01
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Refinement description, Source and taxonomy, Version format compliance
• Version 1.2: 2011-09-21
  Changes: Database references
• Version 1.3: 2023-09-06
  Changes: Data collection, Database references, Derived calculations, Refinement description