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Bifunctional chitinase/lysozyme

Carica papaya (Papaya)
Reviewed-Annotation score: Annotation score: 3 out of 5-Experimental evidence at protein leveli


Bifunctional enzyme with lysozyme/chitinase activity.

Catalytic activityi

Random hydrolysis of N-acetyl-beta-D-glucosaminide (1->4)-beta-linkages in chitin and chitodextrins.
Hydrolysis of (1->4)-beta-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues in a peptidoglycan and between N-acetyl-D-glucosamine residues in chitodextrins.

GO - Molecular functioni

  1. chitinase activity Source: UniProtKB-EC
  2. lysozyme activity Source: UniProtKB-EC

GO - Biological processi

  1. chitin catabolic process Source: UniProtKB-KW
  2. polysaccharide catabolic process Source: UniProtKB-KW
Complete GO annotation...

Keywords - Molecular functioni

Glycosidase, Hydrolase

Keywords - Biological processi

Carbohydrate metabolism, Chitin degradation, Polysaccharide degradation

Protein family/group databases

CAZyiGH19. Glycoside Hydrolase Family 19.

Names & Taxonomyi

Protein namesi
Recommended name:
Bifunctional chitinase/lysozyme
Including the following 2 domains:
Chitinase (EC:
Lysozyme (EC:
OrganismiCarica papaya (Papaya)
Taxonomic identifieri3649 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaerosidsmalvidsBrassicalesCaricaceaeCarica

Subcellular locationi

GO - Cellular componenti

  1. extracellular space Source: UniProtKB-SubCell
Complete GO annotation...

Keywords - Cellular componenti


Pathology & Biotechi

Protein family/group databases

Allergomei1272. Car p Chitinase.

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – ›25›25Bifunctional chitinase/lysozymePRO_0000124810Add


Subunit structurei


Family & Domainsi

Sequence similaritiesi


Sequence statusi: Fragments.

P81241-1 [UniParc]FASTAAdd to basket

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        10         20 
Mass (Da):2,877
Last modified:July 15, 1998 - v1

Experimental Info

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Sequence conflicti3 – 31E → S AA sequence (PubMed:5773045).Curated
Non-adjacent residuesi22 – 232Curated
Non-terminal residuei25 – 251


3D structure databases


Protein family/group databases

Allergomei1272. Car p Chitinase.
CAZyiGH19. Glycoside Hydrolase Family 19.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Family and domain databases



  1. "Papaya (Carica papaya) lysozyme is a member of the family 19 (basic, class II) chitinases."
    Subroto T., Sufiati S., Beintema J.J.
    J. Mol. Evol. 49:819-821(1999) [PubMed] [Europe PMC] [Abstract]
    Cited for: PROTEIN SEQUENCE OF 1-22.
    Tissue: Latex.
  2. "Papaya lysozyme. Terminal sequences and enzymatic properties."
    Howard J.B., Glazer A.N.
    J. Biol. Chem. 244:1399-1409(1969) [PubMed] [Europe PMC] [Abstract]
    Cited for: PROTEIN SEQUENCE OF 1-5 AND 23-25.
    Tissue: Latex.

Entry informationi

Entry nameiCHLY_CARPA
AccessioniPrimary (citable) accession number: P81241
Entry historyi
Integrated into UniProtKB/Swiss-Prot: July 15, 1998
Last sequence update: July 15, 1998
Last modified: January 7, 2015
This is version 58 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program


Keywords - Technical termi

Direct protein sequencing, Multifunctional enzyme


  1. Glycosyl hydrolases
    Classification of glycosyl hydrolase families and list of entries
  2. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

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 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.