_EC 3.2.1.2 Beta-amylase. 44 PDB entries  
EC 3.-.-.- Hydrolases. [19,780 PDB entries]
EC 3.2.-.- Glycosylases. [3,670 PDB entries]
EC 3.2.1.- Glycosidases, i.e. enzymes hydrolyzing O- and S-glycosyl compound [3,167 PDB entries]
EC 3.2.1.2 Beta-amylase. [44 PDB entries]    
1b1y

Reaction: 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.
Other name(s): 4-alpha-D-glucan maltohydrolase. Glycogenase. Saccharogen amylase.
Comments: Acts on starch, glycogen and related polysaccharides and oligosaccharides producing beta-maltose by an inversion.
Links:   [IntEnz]   [ExPASy]   [KEGG]  

There are 44 PDB entries in enzyme class E.C.3.2.1.2

  PDB code Protein
1b1y
Sevenfold mutant of barley beta-amylase
Source: Hordeum vulgare. Organism_taxid: 4513. Variant: cv. Haruna. Expressed in: escherichia coli. Expression_system_taxid: 562. Expression_system_variant: jm 109.
Chain: A (500 residues) CATH domain: 3.20.20.80
1b90
Bacillus cereus beta-amylase apo form
Source: Bacillus cereus. Organism_taxid: 1396. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (516 residues) CATH domains: 3.20.20.80 2.60.40.10
1b9z
Bacillus cereus beta-amylase complexed with maltose
Source: Bacillus cereus. Organism_taxid: 1396. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (516 residues) CATH domains: 3.20.20.80 2.60.40.10
1bfn
Beta-amylase/beta-cyclodextrin complex
Source: Glycine max. Soybean. Organism_taxid: 3847. Organ: seed. Expressed in: escherichia coli. Expression_system_taxid: 562
Chain: A (490 residues) CATH domain: 3.20.20.80
1btc
Three-dimensional structure of soybean beta-amylase determined at 3.0 angstroms resolution: preliminary chain tracing of the complex with alpha-cyclodextrin
Source: Glycine max. Soybean. Organism_taxid: 3847
Chain: A (491 residues) CATH domain: 3.20.20.80
1bya
Crystal structures of soybean beta-amylase reacted with beta-maltose and maltal: active site components and their apparent role in catalysis
Source: Glycine max. Soybean. Organism_taxid: 3847
Chain: A (491 residues) CATH domain: 3.20.20.80
1byb
Crystal structures of soybean beta-amylase reacted with beta-maltose and maltal: active site components and their apparent role in catalysis
Source: Glycine max. Soybean. Organism_taxid: 3847
Chain: A (491 residues) CATH domain: 3.20.20.80
1byc
Crystal structures of soybean beta-amylase reacted with beta-maltose and maltal: active site components and their apparent role in catalysis
Source: Glycine max. Soybean. Organism_taxid: 3847
Chain: A (491 residues) CATH domain: 3.20.20.80
1byd
Crystal structures of soybean beta-amylase reacted with beta-maltose and maltal: active site components and their apparent role in catalysis
Source: Glycine max. Soybean. Organism_taxid: 3847
Chain: A (491 residues) CATH domain: 3.20.20.80
1cqy
Starch binding domain of bacillus cereus beta-amylase
Source: Bacillus cereus. Organism_taxid: 1396. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (99 residues) CATH domain: 2.60.40.10
1fa2
Crystal structure of beta-amylase from sweet potato
Source: Ipomoea batatas. Sweet potato. Organism_taxid: 4120
Chain: A (498 residues) CATH domain: 3.20.20.80
1itc
Beta-amylase from bacillus cereus var. Mycoides complexed with maltopentaose
Source: Bacillus cereus. Organism_taxid: 1396. Strain: var.Mycoides. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (516 residues) CATH domains: 3.20.20.80 2.60.40.10
1j0y
Beta-amylase from bacillus cereus var. Mycoides in complex with glucose
Source: Bacillus cereus. Organism_taxid: 1396. Strain: var. Mycoides
Chains: A, B, C, D (516 residues) CATH domains: 3.20.20.80 2.60.40.10
1j0z
Beta-amylase from bacillus cereus var. Mycoides in complex with maltose
Source: Bacillus cereus. Organism_taxid: 1396. Strain: var. Mycoides
Chains: A, B, C, D (516 residues) CATH domains: 3.20.20.80 2.60.40.10
1j10
Beta-amylase from bacillus cereus var. Mycoides in complex with ggx
Source: Bacillus cereus. Organism_taxid: 1396. Strain: var. Mycoides
Chains: A, B, C, D (516 residues) CATH domains: 3.20.20.80 2.60.40.10
1j11
Beta-amylase from bacillus cereus var. Mycoides in complex with alpha-epg
Source: Bacillus cereus. Organism_taxid: 1396. Strain: var. Mycoides
Chains: A, B, C, D (516 residues) CATH domains: 3.20.20.80 2.60.40.10
1j12
Beta-amylase from bacillus cereus var. Mycoides in complex with alpha-ebg
Source: Bacillus cereus. Organism_taxid: 1396. Strain: var. Mycoides
Chains: A, B, C, D (516 residues) CATH domains: 3.20.20.80 2.60.40.10
1j18
Crystal structure of a beta-amylase from bacillus cereus var. Mycoides cocrystallized with maltose
Source: Bacillus cereus. Organism_taxid: 1396. Strain: var. Mycoides. Expressed in: escherichia coli bl21(de3). Expression_system_taxid: 469008.
Chain: A (516 residues) CATH domains: 3.20.20.80 2.60.40.10
1q6c
Crystal structure of soybean beta-amylase complexed with maltose
Source: Glycine max. Soybean. Organism_taxid: 3847. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (490 residues) CATH domain: 3.20.20.80
1q6d
Crystal structure of soybean beta-amylase mutant (m51t) with increased ph optimum
Source: Glycine max. Soybean. Organism_taxid: 3847. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (490 residues) CATH domain: 3.20.20.80
1q6e
Crystal structure of soybean beta-amylase mutant (e178y) with increased ph optimum at ph 5.4
Source: Glycine max. Soybean. Organism_taxid: 3847. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (490 residues) CATH domain: 3.20.20.80
1q6f
Crystal structure of soybean beta-amylase mutant (e178y) with increased ph optimum at ph 7.1
Source: Glycine max. Soybean. Organism_taxid: 3847. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (490 residues) CATH domain: 3.20.20.80
1q6g
Crystal structure of soybean beta-amylase mutant (n340t) with increased ph optimum
Source: Glycine max. Soybean. Organism_taxid: 3847. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (490 residues) CATH domain: 3.20.20.80
1uko
Crystal structure of soybean beta-amylase mutant substituted at surface region
Source: Glycine max. Soybean. Organism_taxid: 3847. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chains: A, B, C, D (490 residues) CATH domain: 3.20.20.80
1ukp
Crystal structure of soybean beta-amylase mutant substituted at surface region
Source: Glycine max. Soybean. Organism_taxid: 3847. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chains: A, B, C, D (490 residues) CATH domain: 3.20.20.80
1v3h
The roles of glu186 and glu380 in the catalytic reaction of soybean beta-amylase
Source: Glycine max. Soybean. Organism_taxid: 3847. Gene: bmy1. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (491 residues) CATH domain: 3.20.20.80
1v3i
The roles of glu186 and glu380 in the catalytic reaction of soybean beta-amylase
Source: Glycine max. Soybean. Organism_taxid: 3847. Gene: bmy1. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (490 residues) CATH domain: 3.20.20.80
1vem
Crystal structure analysis of bacillus cereus beta-amylase at the optimum ph (6.5)
Source: Bacillus cereus. Organism_taxid: 1396. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (516 residues) CATH domains: 3.20.20.80 2.60.40.10
1ven
Crystal structure analysis of y164e/maltose of bacilus cereus beta-amylase at ph 4.6
Source: Bacillus cereus. Organism_taxid: 1396. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (516 residues) CATH domains: 3.20.20.80 2.60.40.10
1veo
Crystal structure analysis of y164f/maltose of bacillus cereus beta-amylase at ph 4.6
Source: Bacillus cereus. Organism_taxid: 1396. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (516 residues) CATH domains: 3.20.20.80 2.60.40.10
1vep
Crystal structure analysis of triple (t47m/y164e/t328n) /maltose of bacillus cereus beta-amylase at ph 6.5
Source: Bacillus cereus. Organism_taxid: 1396. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (516 residues) CATH domains: 3.20.20.80 2.60.40.10
1wdp
The role of an inner loop in the catalytic mechanism of soybean beta-amylase
Source: Glycine max. Soybean. Organism_taxid: 3847. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (493 residues) CATH domain: 3.20.20.80
1wdq
The role of an inner loop in the catalytic mechanism of soybean beta-amylase
Source: Glycine max. Soybean. Organism_taxid: 3847. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (493 residues) CATH domain: 3.20.20.80
1wdr
The role of an inner loop in the catalytic mechanism of soybean beta-amylase
Source: Glycine max. Soybean. Organism_taxid: 3847. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (493 residues) CATH domain: 3.20.20.80
1wds
The role of an inner loop in the catalytic mechanism of soyb amylase
Source: Glycine max. Soybean. Organism_taxid: 3847. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (492 residues) CATH domain: 3.20.20.80
2dqx
Mutant beta-amylase (w55r) from soy bean
Source: Glycine max. Soybean. Organism_taxid: 3847. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (491 residues) CATH domain: 3.20.20.80
2xff
Crystal structure of barley beta-amylase complexed with acarbose
Source: Hordeum vulgare. Barley. Organism_taxid: 4513. Tissue: grain endosperm. Other_details: protein purchased from megazyme
Chain: A (486 residues) CATH domain: 3.20.20.80
2xfr
Crystal structure of barley beta-amylase at atomic resolutio
Source: Hordeum vulgare. Barley. Organism_taxid: 4513. Tissue: grain endosperm. Other_details: protein purchased from megazyme
Chain: A (487 residues) CATH domain: 3.20.20.80
2xfy
Crystal structure of barley beta-amylase complexed with alpha-cyclodextrin
Source: Hordeum vulgare. Barley. Organism_taxid: 4513. Tissue: grain endosperm. Other_details: protein purchased from megazyme
Chain: A (486 residues) CATH domain: 3.20.20.80
2xg9
Crystal structure of barley beta-amylase complexed with 4-o- alpha-d-glucopyranosylmoranoline
Source: Hordeum vulgare. Barley. Organism_taxid: 4513. Tissue: grain endosperm. Other_details: protein purchased from megazyme
Chain: A (487 residues) CATH domain: 3.20.20.80
2xgb
Crystal structure of barley beta-amylase complexed with 2,3- epoxypropyl-alpha-d-glucopyranoside
Source: Hordeum vulgare. Barley. Organism_taxid: 4513. Tissue: grain endosperm. Other_details: protein purchased from megazyme
Chain: A (486 residues) CATH domain: 3.20.20.80
2xgi
Crystal structure of barley beta-amylase complexed with 3,4- epoxybutyl alpha-d-glucopyranoside
Source: Hordeum vulgare. Organism_taxid: 4513. Tissue: grain endosperm. Other_details: protein purchased from megazyme
Chain: A (487 residues) CATH domain: 3.20.20.80
3voc
Crystal structure of the catalytic domain of beta-amylase fr paenibacillus polymyxa
Source: Paenibacillus polymyxa. Organism_taxid: 1406. Expressed in: escherichia coli. Expression_system_taxid: 562.
Chain: A (416 residues) CATH domain: 3.20.20.80
5bca
Beta-amylase from bacillus cereus var. Mycoides
Source: Bacillus cereus. Organism_taxid: 1396. Strain: bacillus cereus. Variant: mycoides. Cellular_location: extracellular
Chains: A, B, C, D (516 residues) CATH domains: 3.20.20.80 2.60.40.10