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P21227 - CHIB_PEA

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Endochitinase B

Pisum sativum (Garden pea)
Reviewed - Annotation score: 2 out of 5- Experimental evidence at protein leveli


Defense against chitin containing fungal pathogens.

Catalytic activityi

Random hydrolysis of N-acetyl-beta-D-glucosaminide (1->4)-beta-linkages in chitin and chitodextrins.

GO - Molecular functioni

  1. chitinase activity Source: UniProtKB-EC
  2. chitin binding Source: UniProtKB-KW

GO - Biological processi

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

Keywords - Molecular functioni

Glycosidase, Hydrolase

Keywords - Biological processi

Carbohydrate metabolism, Chitin degradation, Plant defense, Polysaccharide degradation

Keywords - Ligandi


Names & Taxonomyi

Protein namesi
Recommended name:
Endochitinase B (EC:
OrganismiPisum sativum (Garden pea)
Taxonomic identifieri3888 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaerosidsfabidsFabalesFabaceaePapilionoideaeFabeaePisum

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – ›23›23Endochitinase BPRO_0000124829Add



By infection with the fungal pathogen Ascochyta pisi.

Family & Domainsi

Sequence similaritiesi

Family and domain databases

Gene3Di3.30.60.10. 1 hit.
InterProiIPR001002. Chitin-bd_1.
[Graphical view]
PfamiPF00187. Chitin_bind_1. 1 hit.
[Graphical view]
ProDomiPD000609. Chitin_bd_1. 1 hit.
[Graphical view] [Entries sharing at least one domain]
SUPFAMiSSF57016. SSF57016. 1 hit.


Sequence statusi: Fragment.

P21227-1 [UniParc]FASTAAdd to Basket

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        10         20 
Mass (Da):2,424
Last modified:May 1, 1991 - v1

Experimental Info

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Non-terminal residuei23 – 231


3D structure databases

ModBasei Search...
MobiDBi Search...

Protocols and materials databases

Structural Biology Knowledgebase Search...

Family and domain databases

Gene3Di 1 hit.
InterProi IPR001002. Chitin-bd_1.
[Graphical view ]
Pfami PF00187. Chitin_bind_1. 1 hit.
[Graphical view ]
ProDomi PD000609. Chitin_bd_1. 1 hit.
[Graphical view ] [Entries sharing at least one domain ]
SUPFAMi SSF57016. SSF57016. 1 hit.
ProtoNeti Search...


  1. "Induction, purification and characterization of chitinase isolated from pea leaves inoculated with Ascochyta pisi."
    Vad K., Mikkelsen J.D., Collinge D.B.
    Planta 184:24-29(1991)
    Cited for: PROTEIN SEQUENCE.
    Strain: cv. Birte.
    Tissue: Leaf.

Entry informationi

Entry nameiCHIB_PEA
AccessioniPrimary (citable) accession number: P21227
Entry historyi
Integrated into UniProtKB/Swiss-Prot: May 1, 1991
Last sequence update: May 1, 1991
Last modified: October 1, 2014
This is version 77 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


  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.