7CIT

Crystal structure of tyrosinase from Streptomyces castaneoglobisporus in complex with the caddie protein obtained by soaking in the solution containing Cu(II) and hydroxylamine for 24 h


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.144 
  • R-Value Observed: 0.144 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

The basicity of an active-site water molecule discriminates between tyrosinase and catechol oxidase activity.

Matoba, Y.Oda, K.Muraki, Y.Masuda, T.

(2021) Int J Biol Macromol 183: 1861-1870

  • DOI: https://doi.org/10.1016/j.ijbiomac.2021.05.206
  • Primary Citation of Related Structures:  
    7CIT, 7CIY

  • PubMed Abstract: 

    Tyrosinase (Ty) and catechol oxidase (CO) are members of type-3 copper enzymes. While Ty catalyzes both phenolase and catecholase reactions, CO catalyzes only the latter reaction. In the present study, Ty was found to catalyze the catecholase reaction, but hardly the phenolase reaction in the presence of the metallochaperon called "caddie protein (Cad)". The ability of the substrates to dissociate the motif shielding the active-site pocket seems to contribute critically to the substrate specificity of Ty. In addition, a mutation at the N191 residue, which forms a hydrogen bond with a water molecule near the active center, decreased the inherent ratio of phenolase versus catecholase activity. Unlike the wild-type complex, reaction intermediates were not observed when the catalytic reaction toward the Y98 residue of Cad was progressed in the crystalline state. The increased basicity of the water molecule may be necessary to inhibit the proton transfer from the conjugate acid to a hydroxide ion bridging the two copper ions. The deprotonation of the substrate hydroxyl by the bridging hydroxide seems to be significant for the efficient catalytic cycle of the phenolase reaction.


  • Organizational Affiliation

    Faculty of Pharmacy, Yasuda Women's University, Yasuhigashi 6-13-1, Asaminami-ku, Hiroshima, 731-0153, Japan. Electronic address: matoba@yasuda-u.ac.jp.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tyrosinase281Streptomyces castaneoglobisporusMutation(s): 0 
UniProt
Find proteins for Q83WS2 (Streptomyces castaneoglobisporus)
Explore Q83WS2 
Go to UniProtKB:  Q83WS2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ83WS2
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
MelC134Streptomyces castaneoglobisporusMutation(s): 0 
UniProt
Find proteins for Q83WS1 (Streptomyces castaneoglobisporus)
Explore Q83WS1 
Go to UniProtKB:  Q83WS1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ83WS1
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CU (Subject of Investigation/LOI)
Query on CU

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
F [auth A],
G [auth A],
L [auth B]
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
NO3
Query on NO3

Download Ideal Coordinates CCD File 
H [auth A]
I [auth A]
J [auth A]
K [auth A]
M [auth B]
H [auth A],
I [auth A],
J [auth A],
K [auth A],
M [auth B],
N [auth B]
NITRATE ION
N O3
NHNBFGGVMKEFGY-UHFFFAOYSA-N
PEO (Subject of Investigation/LOI)
Query on PEO

Download Ideal Coordinates CCD File 
C [auth A]HYDROGEN PEROXIDE
H2 O2
MHAJPDPJQMAIIY-UHFFFAOYSA-N
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
G1X
Query on G1X
B
L-PEPTIDE LINKINGC9 H9 N O4TYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.144 
  • R-Value Observed: 0.144 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.56α = 90
b = 96.08β = 90
c = 54.65γ = 90
Software Package:
Software NamePurpose
SHELXrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-06-16
    Type: Initial release
  • Version 1.1: 2021-06-23
    Changes: Database references
  • Version 1.2: 2023-11-29
    Changes: Data collection, Database references, Derived calculations, Refinement description