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 R11262
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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.
History
EC 3.2.1.2 created 1961
Pathway
ec00500  Starch and sucrose metabolism
ec01100  Metabolic pathways
Orthology
K01177  beta-amylase
Genes
ATH: AT3G23920(BAM1) AT4G00490(BAM2) AT4G17090(CT-BMY)
ALY: ARALYDRAFT_479940(BMY7) ARALYDRAFT_490517(BMY9) ARALYDRAFT_915010(CT-BMY)
GMX: 100781423 100781448 100784912 100786079 100818063 547683(BMY2)
MTR: MTR_5g013620 MTR_5g013640
CSV: 101213455 101221739
RCU: 8261877 8265689
VVI: 100242636 100247246 100255167 100261291
OSA: 4331577 4347903 4348840 4349417
DOSA: Os03t0141200-01(Os03g0141200) Os09t0569200-01(Os09g0569200) Os10t0465700-01(Os10g0465700)
BDI: 100827802 100835267
ZMA: 100281141 100281767(pco104637)
CRE: CHLREDRAFT_183141(AMYB1)
MIS: MICPUN_108038(BAM1)
EHI: EHI_009020(1.t00075) EHI_035700 EHI_049700 EHI_148800(1.t00074)
 » show all
Taxonomy
Reference
1  [PMID:18902365]
  Authors
BALLS AK, WALDEN MK, THOMPSON RR
  Title
A crystalline beta-amylase from sweet potatoes.
  Journal
J Biol Chem 173:9-19 (1948)
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 17:371-430 (1962)
Other DBs
ExplorEnz - The Enzyme Database: 3.2.1.2
IUBMB Enzyme Nomenclature: 3.2.1.2
ExPASy - ENZYME nomenclature database: 3.2.1.2
BRENDA, the Enzyme Database: 3.2.1.2
CAS: 9000-91-3

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