Entry
Name
exo-poly-alpha-digalacturonosidase;
pehX (gene name);
poly(1,4-alpha-D-galactosiduronate) digalacturonohydrolase;
exopolygalacturonosidase (misleading);
poly[(1->4)-alpha-D-galactosiduronate] digalacturonohydrolase;
exo-poly-alpha-galacturonosidase
Class
Hydrolases;
Glycosylases;
Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds
BRITE hierarchy
Sysname
poly[(1->4)-alpha-D-galactosiduronate] non-reducing-end-digalacturonohydrolase
Reaction(IUBMB)
[(1->4)-alpha-D-galacturonosyl]n + H2O = alpha-D-galacturonosyl-(1->4)-D-galacturonate + [(1->4)-alpha-D-galacturonosyl]n-2 [RN:
R02360 R06239 ]
Reaction(KEGG)
Substrate
[(1->4)-alpha-D-galacturonosyl]n [CPD:
C00470 ];
H2O [CPD:
C00001 ]
Product
alpha-D-galacturonosyl-(1->4)-D-galacturonate [CPD:
C02273 ];
[(1->4)-alpha-D-galacturonosyl]n-2
Comment
The enzyme, characterized from bacteria, hydrolyses the second alpha-1,4-glycosidic bond from the non-reducing end of polygalacturonate, releasing digalacturonate.
History
EC 3.2.1.82 created 1972, modified 2019
Orthology
K18650 exo-poly-alpha-galacturonosidase
Genes
KIE : NCTC12125_00461(pehX_1)
SFO : Z042_11045 Z042_19390
DDD : Dda3937_00261(pehX) Dda3937_00262(pehW) Dda3937_00263(pehV)
DZE : Dd1591_0152 Dd1591_0153
DSO : A4U42_07660 A4U42_07670 A4U42_07675
PMUD : NCTC8068_02353(pehX)
PTAE : NCTC10697_02681(pehX)
CRW : CROST_001180(pehX_1) CROST_001190(pehX_2) CROST_002390(pehX_3)
CFB : CLFE_000630(pehX_1) CLFE_001810(pehX_2) CLFE_001820(pehX_3) CLFE_040580
CAUN : CLAUR_021790 CLAUR_027690(pehX_1) CLAUR_028900(pehX_2) CLAUR_028910(pehX_3)
CGEL : psyc5s11_19170(pehX)
» show all
Taxonomy
Reference
Authors
Hasegawa S, Nagel CW.
Title
Isolation of an oligogalacturonate hydrolase from a Bacillus specie.
Journal
Reference
2
Authors
Hatanaka, C. and Ozawa, J.
Title
Enzymic degradation of pectic acid. XIII. New exopolygalacturonase producing digalacturonic acid from pectic acid.
Journal
J Agric Chem Soc Jpn 43:764-772 (1968)
Reference
3
Authors
Hatanaka, C. and Ozawa, J.
Title
Ber des O'Hara Inst 15:47 (1971)
Reference
Authors
He SY, Collmer A
Title
Molecular cloning, nucleotide sequence, and marker exchange mutagenesis of the exo-poly-alpha-D-galacturonosidase-encoding pehX gene of Erwinia chrysanthemi EC16.
Journal
Sequence
Other DBs
ExplorEnz - The Enzyme Database: 3.2.1.82
ExPASy - ENZYME nomenclature database: 3.2.1.82