Reviewed, UniProtKB/Swiss-Prot P52397 (E13J_TOBAC)

Names and origin

Protein names

Recommended name:
    Glucan endo-1,3-beta-glucosidase, acidic isoform PR-O
    EC=3.2.1.39
Alternative name(s):
    (1->3)-beta-glucan endohydrolase
      Short name=(1->3)-beta-glucanase
    Beta-1,3-endoglucanase
    PR-37

Gene names

Name:

PR0

Organism

Nicotiana tabacum (Common tobacco)

Taxonomic identifier

4097 [NCBI]

Taxonomic lineage

Eukaryota › Viridiplantae › Streptophyta › Embryophyta › Tracheophyta › Spermatophyta › Magnoliophyta › eudicotyledons › core eudicotyledons › asterids › lamiids › Solanales › Solanaceae › Nicotianoideae › Nicotianeae › Nicotiana

Protein attributes

Sequence length	160 AA.
Sequence status	Fragment.
Protein existence	Evidence at protein level.

General annotation (Comments)

Function	Implicated in the defense of plants against pathogens.
Catalytic activity	Hydrolysis of (1->3)-beta-D-glucosidic linkages in (1->3)-beta-D-glucans.
Subcellular location	Secreted › extracellular space.
Induction	Not found in healthy tissues, but accumulates to high levels in the extracellular compartment of leaves in response to pathogen infection or treatment with salicylic acid.
Post-translational modification	The N-terminus is blocked.
Sequence similarities	Belongs to the glycosyl hydrolase 17 family.

Ontologies

Keywords
Biological process	Plant defense
Cellular component	Secreted
Molecular function	Glycosidase Hydrolase
Technical term	Direct protein sequencing
Gene Ontology (GO)
Biological process	carbohydrate metabolic process Inferred from electronic annotation. Source: InterPro defense response Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	extracellular space Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	cation binding Inferred from electronic annotation. Source: InterPro glucan endo-1,3-beta-D-glucosidase activity Inferred from electronic annotation. Source: EC
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	‹1 – 160	›160	Glucan endo-1,3-beta-glucosidase, acidic isoform PR-O		PRO_0000205278
Sites
	Active site	81	1	Nucleophile By similarity
	Active site	141	1	Proton donor By similarity
Experimental info
	Sequence conflict	128	1	A → N AA sequence Ref.2
	Sequence conflict	135	1	K → Q AA sequence Ref.2
	Non-terminal residue	1	1

Sequences

	Sequence		Length	Mass (Da)
	P52397-1 [UniParc]. Last modified October 1, 1996. Version 1. Checksum: 98C270F390764B7F	FASTA	160	17,980
	10 20 30 40 50 60 NSFINPIIQF LARNNLPLLA NVYPYFGHIY NTADVPLSYA LFTQQEANPA GYQNLFDALL 70 80 90 100 110 120 DSMYFAVEKA GGPNVEIIVS ESGWPSEGNS AATIENAQTY YRNLIDHVKR GAGTPKKPGK 130 140 150 160 TIETYLFAMF DENDKKGEIT EKHFGLFSPD QRAKYQLNFN

References

[1]	"Differential regulation of beta-1,3-glucanase messenger RNAs in response to pathogen infection." Ward E.R., Payne G.B., Moyer M.B., Williams S.C., Dincher S.S., Sharkey K.C., Beck J.J., Taylor H.T., Ahl-Goy P., Meins F., Ryals J.A. Plant Physiol. 96:390-397(1991) [PubMed: 16668198] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA], PARTIAL PROTEIN SEQUENCE. Strain: cv. Xanthi NC. Tissue: Leaf.
[2]	"Characterization of vacuolar and extracellular beta(1,3)-glucanases of tobacco: evidence for a strictly compartmentalized plant defense system." van den Bulcke M., Bauw G., Castresana C., van Montagu M., Vandekerckhove J. Proc. Natl. Acad. Sci. U.S.A. 86:2673-2677(1989) [PubMed: 16594025] [Abstract] Cited for: PROTEIN SEQUENCE OF 70-93; 126-136; 143-152 AND 155-160.

Cross-references

Sequence databases
EMBL GenBank DDBJ	M60461 mRNA. Translation: AAA34102.1.
3D structure databases
SMR	P52397. Positions 2-159.
ModBase	Search...
Protein family/group databases
CAZy	GH17. Glycoside Hydrolase Family 17.
Proteomic databases
PRIDE	P52397.
Enzyme and pathway databases
BRENDA	3.2.1.39. 298.
Family and domain databases
InterPro	IPR000490. Glyco_hydro_17. IPR017853. Glyco_hydro_catalytic_core. IPR013781. Glyco_hydro_sg_catalytic. [Graphical view]
Gene3D	G3DSA:3.20.20.80. Glyco_hydro_cat. 1 hit.
Pfam	PF00332. Glyco_hydro_17. 1 hit. [Graphical view]
PROSITE	PS00587. GLYCOSYL_HYDROL_F17. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

E13J_TOBAC

Accession

Primary (citable) accession number: P52397

Entry history

Integrated into UniProtKB/Swiss-Prot:	October 1, 1996
Last sequence update:	October 1, 1996
Last modified:	January 19, 2010
This is version 56 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

PPAP (Plant Proteome Annotation Project)