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Cerrena unicolor (Canker rot fungus) (Daedalea unicolor)
Reviewed-Annotation score: Annotation score: 4 out of 5-Experimental evidence at protein leveli


Lignin degradation and detoxification of lignin-derived products (Probable). Has highest activity towards ABTS, also active towards ferulic acid and guaiacol, but is not active towards tyrosine, vanillic acid, 2,5-dimethyl aniline, p-anisidine or violuric acid.Curated1 Publication

Catalytic activityi

4 benzenediol + O2 = 4 benzosemiquinone + 2 H2O.By similarity1 Publication


Cu cationBy similarityNote: Binds 4 Cu cations per monomer.By similarity

Enzyme regulationi

Inhibited by sodium azide, SDS and mercaptoethanol, but not by 4-hexyl resocinol, L-cysteine and dithiothreitol. Activity is inhibited by the heavy metal ions Cr, W, Sn, Ag+ and Hg2+, but not by Pb2+, Fe3+, Ni2+, Li2+, Co2+ or Cd2+.1 Publication


  1. KM=54.1 µM for ABTS (at 70 degrees Celsius)1 Publication
  2. KM=57.1 µM for ABTS (at 30 degrees Celsius)1 Publication
  3. KM=19.2 µM for syringaldizine (at 30 degrees Celsius)1 Publication

    pH dependencei

    Optimum pH is 3.0 at 70 degrees Celsius with ABTS as substrate, and 6.0 with guaiacol and syringaldazine as substrate.1 Publication

    Temperature dependencei

    Optimum temperature is 70 degrees Celsius at pH 3.0 with ABTS as substrate. Retains 100% of its activity after 1 hour at 30 degrees Celsius at pH 9.0. Retains more than 60% of its activity after 180 minutes at 60 degrees Celsius at pH 9.0. Retains approximately 50% of its activity after 90 minutes at 70 degrees Celsius at pH 9.0.1 Publication

    GO - Molecular functioni

    GO - Biological processi

    Complete GO annotation...

    Keywords - Molecular functioni


    Keywords - Biological processi

    Lignin degradation

    Keywords - Ligandi

    Copper, Metal-binding

    Names & Taxonomyi

    Protein namesi
    Recommended name:
    Laccase-2d1 Publication (EC:
    Alternative name(s):
    Benzenediol:oxygen oxidoreductaseBy similarity
    Diphenol oxidaseBy similarity
    Laccase-IId1 Publication
    Short name:
    Lac-IId1 Publication
    Urishiol oxidaseBy similarity
    OrganismiCerrena unicolor (Canker rot fungus) (Daedalea unicolor)
    Taxonomic identifieri90312 [NCBI]
    Taxonomic lineageiEukaryotaFungiDikaryaBasidiomycotaAgaricomycotinaAgaricomycetesPolyporalesPolyporaceaeCerrena

    Subcellular locationi

    GO - Cellular componenti

    Complete GO annotation...

    Keywords - Cellular componenti


    PTM / Processingi

    Molecule processing

    Feature keyPosition(s)DescriptionActionsGraphical viewLength
    ChainiPRO_00003200221 – ›47Laccase-2dAdd BLAST›47

    Amino acid modifications

    Feature keyPosition(s)DescriptionActionsGraphical viewLength
    Glycosylationi42N-linked (GlcNAc...)Sequence analysis1

    Post-translational modificationi

    N-glycosylated; contains 17% carbohydrates.1 Publication

    Keywords - PTMi



    Subunit structurei

    Homodimer.By similarity

    Family & Domainsi

    Domains and Repeats

    Feature keyPosition(s)DescriptionActionsGraphical viewLength
    Domaini2 – ›47Plastocyanin-likeSequence analysisAdd BLAST›46

    Sequence similaritiesi

    Belongs to the multicopper oxidase family.Sequence analysis
    Contains at least 1 plastocyanin-like domain.Sequence analysis

    Keywords - Domaini



    Sequence statusi: Fragments.

    P85430-1 [UniParc]FASTAAdd to basket

    « Hide

            10         20         30         40 
    Mass (Da):4,846
    Last modified:September 2, 2008 - v2

    Experimental Info

    Feature keyPosition(s)DescriptionActionsGraphical viewLength
    Non-adjacent residuesi30 – 311 Publication2
    Non-terminal residuei471 Publication1


    3D structure databases


    Protocols and materials databases

    Structural Biology KnowledgebaseSearch...

    Family and domain databases


    Entry informationi

    Entry nameiLAC2D_CERUI
    AccessioniPrimary (citable) accession number: P85430
    Entry historyi
    Integrated into UniProtKB/Swiss-Prot: February 26, 2008
    Last sequence update: September 2, 2008
    Last modified: December 9, 2015
    This is version 26 of the entry and version 2 of the sequence. [Complete history]
    Entry statusiReviewed (UniProtKB/Swiss-Prot)
    Annotation programFungal Protein Annotation Program



    On the 2D-gel the determined pI of this protein is: 5.3, its MW is: 59 kDa.1 Publication

    Keywords - Technical termi

    Direct protein sequencing


    1. SIMILARITY comments
      Index of protein domains and families

    Similar proteinsi

    Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
    100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
    90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
    50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.