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: AT2G32290(BAM6) AT2G45880(BAM7) AT3G23920(BAM1) AT4G00490(BAM2) AT4G15210(BAM5) AT4G17090(CT-BMY) AT5G45300(BMY2)
ALY: ARALYDRAFT_346398 ARALYDRAFT_356484 ARALYDRAFT_479940(BMY7) ARALYDRAFT_482158(BMY5) ARALYDRAFT_490517(BMY9) ARALYDRAFT_493370 ARALYDRAFT_655622 ARALYDRAFT_915010(CT-BMY)
CRB: 17877106 17879270 17880413 17883487 17889672 17890392 17893413
CSAT: 104700230 104711996 104718638 104718910 104723389 104723634 104724891 104726118 104731868 104732129 104732249 104737728 104746962 104749640 104760387 104761622 104766351 104771744 104783162 104784731 104786364 104789351 104793558
EUS: EUTSA_v10001222mg EUTSA_v10001342mg EUTSA_v10002460mg EUTSA_v10016419mg EUTSA_v10024842mg EUTSA_v10024989mg EUTSA_v10028560mg
BRP: 103828653 103832587 103833505 103836914 103853626 103860025 103860895 103866930 103867633 103868361
BNA: 106351474 106358621 106358811 106360628 106361233 106365522 106370686 106375875 106375876 106380582 106380881 106380883 106411687 106425446 106425547 106434958 106437457 106440136 106440256 106445054 106450573 106450876 106450941 106451309 106452475 111204160 111206577
BOE: 106306250 106306418 106308651 106309556 106309689 106313586 106320014 106321594 106321807 106328459 106333948 106337419 106343040
THJ: 104800979 104802027 104806203 104807939 104814103 104821625
CPAP: 110813977 110818498 110819443 110819590
LJA: Lj0g3v0061799.1(Lj0g3v0061799.1) Lj0g3v0359449.1(Lj0g3v0359449.1) Lj1g3v2659300.1(Lj1g3v2659300.1) Lj2g3v0632120.1(Lj2g3v0632120.1) Lj2g3v0632130.1(Lj2g3v0632130.1) Lj2g3v1550200.1(Lj2g3v1550200.1) Lj2g3v1550200.2(Lj2g3v1550200.2) Lj2g3v1988790.1(Lj2g3v1988790.1) Lj2g3v1988790.2(Lj2g3v1988790.2) Lj2g3v1988800.1(Lj2g3v1988800.1) Lj3g3v2888320.1(Lj3g3v2888320.1) Lj4g3v3014460.1(Lj4g3v3014460.1)
DOSA: Os02t0129600-01(Os02g0129600) Os03t0141200-01(Os03g0141200) Os07t0543100-00(Os07g0543100) Os07t0543300-00(Os07g0543300) Os09t0569200-01(Os09g0569200) Os10t0465700-01(Os10g0465700) Os10t0565200-00(Os10g0565200)
ATS: 109732133(LOC109732133) 109734320(LOC109734320) 109744975(LOC109744975) 109744980(LOC109744980) 109753673(LOC109753673) 109761795(LOC109761795) 109763622(LOC109763622) 109768159(LOC109768159) 109783079(LOC109783079)
MIS: MICPUN_108038(BAM1) MICPUN_96665(BAM2)
DFA: DFA_03928
EHI: EHI_009020(1.t00075) EHI_035700 EHI_049700 EHI_058340 EHI_098200(77.t00031) EHI_118440(261.t00004) EHI_148800(1.t00074) EHI_192590(69.t00017)
SMIN: v1.2.010847.t1(symbB.v1.2.010847.t1) v1.2.033973.t1(symbB.v1.2.033973.t1)
 » 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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