1LQA | pdb_00001lqa

TAS PROTEIN FROM ESCHERICHIA COLI IN COMPLEX WITH NADPH

• PDB DOI: https://doi.org/10.2210/pdb1LQA/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2002-05-09 Released: 2003-07-08 
• Deposition Author(s): Obmolova, G., Teplyakov, A., Khil, P.P., Howard, A.J., Camerini-Otero, R.D., Gilliland, G.L., Structure 2 Function Project (S2F)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 
  0.186 (Depositor), 0.190 (DCC) 
• R-Value Work: 
  0.145 (Depositor), 0.150 (DCC) 
• R-Value Observed: 
  0.146 (Depositor) 

Literature

Crystal structure of the Escherichia coli Tas protein, an NADP(H)-dependent aldo-keto reductase

Obmolova, G., Teplyakov, A., Khil, P.P., Howard, A.J., Camerini-Otero, R.D., Gilliland, G.L.

(2003) Proteins 53: 323-325

• PubMed: 14519207 
• DOI: https://doi.org/10.1186/1472-6807-3-7
• Primary Citation Related Structures: 
  1LQA, 1NMO, 1NMP


• PubMed Abstract: 
  

  The protein encoded by the gene ybgI was chosen as a target for a structural genomics project emphasizing the relation of protein structure to function. The structure of the ybgI protein is a toroid composed of six polypeptide chains forming a trimer of dimers. Each polypeptide chain binds two metal ions on the inside of the toroid. The toroidal structure is comparable to that of some proteins that are involved in DNA metabolism. The di-nuclear metal site could imply that the specific function of this protein is as a hydrolase-oxidase enzyme.

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Organizational Affiliation: 
• Center for Advanced Research in Biotechnology, University of Maryland Biotechnology Institute and the National Institute of Standards and Technology, 9600 Gudelsky Drive, Rockville, MD 20850, USA. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Biological Assembly 3  

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

Biological assembly 3 generated by PISA,PQS (software)

Macromolecule Content 

• Total Structure Weight: 78.58 kDa 
• Atom Count: 6,401 
• Modeled Residue Count: 692 
• Deposited Residue Count: 692 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tas protein	A, B	346	Escherichia coli	Mutation(s): 0  Gene Names: Tas
UniProt
Find proteins for P0A9T4 (Escherichia coli (strain K12)) Explore P0A9T4  Go to UniProtKB:  P0A9T4

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NDP	C [auth A], D [auth B]	NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE C21 H30 N7 O17 P3 ACFIXJIJDZMPPO-NNYOXOHSSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free:  0.186 (Depositor), 0.190 (DCC) 
• R-Value Work:  0.145 (Depositor), 0.150 (DCC) 
• R-Value Observed: 0.146 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 58.3	α = 90
b = 81.46	β = 90
c = 145.02	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
SCALEPACK	data scaling
MLPHARE	phasing
REFMAC	refinement
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-07-08 
Deposition Author(s): Obmolova, G., Teplyakov, A., Khil, P.P., Howard, A.J., Camerini-Otero, R.D., Gilliland, G.L., Structure 2 Function Project (S2F)

Revision History  

• Version 1.0: 2003-07-08
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references, Derived calculations