7CIY

Crystal structure of N191G-mutated 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: 1.47 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.137 
  • R-Value Observed: 0.137 

wwPDB Validation   3D Report Full Report


This is version 1.1 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: 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)" ...

    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

    Division of Applied Biological Science, Faculty of Agriculture, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka 573-0101, Japan.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TyrosinaseA281Streptomyces castaneoglobisporusMutation(s): 0 
UniProt
Find proteins for Q83WS2 (Streptomyces castaneoglobisporus)
Explore Q83WS2 
Go to UniProtKB:  Q83WS2
Entity Groups  
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UniProt GroupQ83WS2
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
MelCB134Streptomyces 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
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.47 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.137 
  • R-Value Observed: 0.137 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.85α = 90
b = 97.4β = 90
c = 54.98γ = 90
Software Package:
Software NamePurpose
HKL-2000data scaling
SHELXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2020-07-08 
  • Released Date: 2021-06-16 
  • Deposition Author(s): Oda, K., Matoba, Y.

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