KEGG   ENZYME: 3.2.1.2Help
Entry
EC 3.2.1.2                  Enzyme                                 
Name
beta-amylase;
saccharogen amylase;
glycogenase;
beta amylase, beta-amylase;
1,4-alpha-D-glucan maltohydrolase
Class
Hydrolases;
Glycosylases;
Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds
BRITE hierarchy
Sysname
4-alpha-D-glucan maltohydrolase
Reaction(IUBMB)
Hydrolysis of (1->4)-alpha-D-glucosidic linkages in polysaccharides so as to remove successive maltose units from the non-reducing ends of the chains
Reaction(KEGG)
(other) R02112 R06159(G)
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Comment
Acts on starch, glycogen and related polysaccharides and oligosaccharides producing beta-maltose by an inversion. The term 'beta'' relates to the initial anomeric configuration of the free sugar group released and not to the configuration of the linkage hydrolysed.
Pathway
Starch and sucrose metabolism
Metabolic pathways
Orthology
K01177  
beta-amylase
Genes
ATH: 
AT3G23920(BAM1) AT4G00490(BAM2) AT4G17090(CT-BMY)
ALY: 
GMX: 
MTR: 
RCU: 
POP: 
VVI: 
OSA: 
DOSA: 
Os03t0141200-01(Os03g0141200) Os09t0569200-01(Os09g0569200)
BDI: 
SBI: 
SORBI_01g028700(SORBIDRAFT_01g028700) SORBI_01g047500(SORBIDRAFT_01g047500) SORBI_02g012320(SORBIDRAFT_02g012320)
ZMA: 
100281767(pco104637)
SMO: 
SELMODRAFT_145994 SELMODRAFT_43201
PPP: 
PHYPADRAFT_107034 PHYPADRAFT_118142
CRE: 
CHLREDRAFT_183141(AMYB1)
EHI: 
EHI_009020(1.t00075) EHI_035700 EHI_049700 EHI_148800(1.t00074)
TVA: 
TVAG_175670
 » show all
Taxonomy
Reference
1
  Authors
Balls, A.K., Walden, M.K. and Thompson, R.R.
  Title
A crystalline beta-amylase from sweet potatoes.
  Journal
J. Biol. Chem. 173 (1948) 9-19.
Reference
2
  Authors
French, D.
  Title
beta-Amylases.
  Journal
In: Boyer, P.D., Lardy, H. and Myrback, K. (Eds.), The Enzymes, 2nd ed., vol. 4, Academic Press, New York, 1960, p. 345-368.
Reference
3
  Authors
Manners, D.J.
  Title
Enzymic synthesis and degradation of starch and glycogen.
  Journal
Adv. Carbohydr. Chem. 17 (1962) 371-430.
Other DBs
ExplorEnz - The Enzyme Database: 
IUBMB Enzyme Nomenclature: 
ExPASy - ENZYME nomenclature database: 
BRENDA, the Enzyme Database: 
CAS: 
9000-91-3
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