1MLW

Crystal structure of human tryptophan hydroxylase with bound 7,8-dihydro-L-biopterin cofactor and Fe(III)

• PDB DOI: https://doi.org/10.2210/pdb1MLW/pdb

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


• Deposited: 2002-08-31 Released: 2002-12-18 
• Deposition Author(s): Wang, L., Erlandsen, H., Haavik, J., Knappskog, P.M., Stevens, R.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.71 Å
• R-Value Free: 0.230 
• R-Value Work: 0.205 

Starting Model: experimental

Literature

Three-dimensional structure of human tryptophan hydroxylase and its implications for the biosynthesis of the neurotransmitters serotonin and melatonin

Wang, L., Erlandsen, H., Haavik, J., Knappskog, P.M., Stevens, R.C.

(2002) Biochemistry 41: 12569-12574

• PubMed: 12379098 
• DOI: https://doi.org/10.1021/bi026561f
• Primary Citation of Related Structures:  
  1MLW


• PubMed Abstract: 
  

  Tryptophan hydroxylase oxidizes L-tryptophan to 5-hydroxy-L-tryptophan in the rate-determining step of serotonin biosynthesis. We have determined the X-ray crystal structure (1.7 A) of a truncated functional form of human tryptophan hydroxylase with the bound cofactor analogue 7,8-dihydro-L-biopterin, providing the first atomic-resolution information for the catalytic domain of this important enzyme. Comparison of the three-dimensional structures of all three members of the aromatic amino acid hydroxylase family--tyrosine hydroxylase, phenylalanine hydroxylase, and tryptophan hydroxylase--reveals important differences at the active sites.

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Organizational Affiliation: 

Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 34.94 kDa 
• Atom Count: 2,605 
• Modelled Residue Count: 290 
• Deposited Residue Count: 301 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tryptophan 5-monooxygenase	A	301	Homo sapiens	Mutation(s): 0  Gene Names: TPH EC: 1.14.16.4
UniProt & NIH Common Fund Data Resources
Find proteins for P17752 (Homo sapiens) Explore P17752  Go to UniProtKB:  P17752
PHAROS:  P17752 GTEx:  ENSG00000129167

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HBI	C [auth A]	7,8-DIHYDROBIOPTERIN C9 H13 N5 O3 FEMXZDUTFRTWPE-DZSWIPIPSA-N
FE	B [auth A]	FE (III) ION Fe VTLYFUHAOXGGBS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.71 Å
• R-Value Free: 0.230 
• R-Value Work: 0.205 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.775	α = 90
b = 57.334	β = 90
c = 109.41	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
SCALEPACK	data scaling
EPMR	phasing
CNS	refinement
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2002-12-18 
Deposition Author(s): Wang, L., Erlandsen, H., Haavik, J., Knappskog, P.M., Stevens, R.C.

Revision History  

• Version 1.0: 2002-12-18
  Type: Initial release
  
• Version 1.1: 2007-10-16
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references, Derived calculations, Refinement description