1JIB

Complex of Alpha-amylase II (TVA II) from Thermoactinomyces vulgaris R-47 with Maltotetraose Based on a Crystal Soaked with Maltohexaose.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report



Literature

Structures of Thermoactinomyces vulgaris R-47 alpha-amylase II complexed with substrate analogues.

Yokota, T.Tonozuka, T.Shimura, Y.Ichikawa, K.Kamitori, S.Sakano, Y.

(2001) Biosci Biotechnol Biochem 65: 619-626

  • DOI: 10.1271/bbb.65.619
  • Primary Citation of Related Structures:  
    1JIB, 1JL8

  • PubMed Abstract: 
  • The structures of Thermoactinomyces vulgaris R-47 alpha-amylase II mutant (d325nTVA II) complexed with substrate analogues, methyl beta-cyclodextrin (m beta-CD) and maltohexaose (G6), were solved by X-ray diffraction at 3.2 A and 3.3 A resolution, re ...

    The structures of Thermoactinomyces vulgaris R-47 alpha-amylase II mutant (d325nTVA II) complexed with substrate analogues, methyl beta-cyclodextrin (m beta-CD) and maltohexaose (G6), were solved by X-ray diffraction at 3.2 A and 3.3 A resolution, respectively. In d325nTVA II-m beta-CD complex, the orientation and binding-position of beta-CD in TVA II were identical to those in cyclodextin glucanotransferase (CGTase). The active site residues were essentialy conserved, while there are no residues corresponding to Tyr89, Phe183, and His233 of CGTase in TVA II. In d325nTVA II-G6 complex, the electron density maps of two glucosyl units at the non-reducing end were disordered and invisible. The four glucosyl units of G6 were bound to TVA II as in CGTase, while the others were not stacked and were probably flexible. The residues of TVA II corresponding to Tyr89, Lys232, and His233 of CGTase were completely lacking. These results suggest that the lack of the residues related to alpha-glucan and CD-stacking causes the functional distinctions between CGTase and TVA II.


    Related Citations: 
    • Analysis of catalytic residues of Thermoactinomyces vulgaris R-47 alpha-amylase II (TVA II) by site-directed mutagenesis.
      Ichikawa, K., Tonozuka, T., Yokota, T., Shimura, Y., Sakano, Y.
      (2000) Biosci Biotechnol Biochem 64: 2692

    Organizational Affiliation

    Department of Applied Biological Science, Tokyo University of Agriculture and Technology, Fuchu-shi, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NEOPULLULANASEAB585Thermoactinomyces vulgarisMutation(s): 1 
Gene Names: tvaII
EC: 3.2.1.135
Find proteins for Q08751 (Thermoactinomyces vulgaris)
Explore Q08751 
Go to UniProtKB:  Q08751
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation
alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose
C, D
4 N/A
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 2
IDChainsNameType/Class2D Diagram3D Interactions
PRD_900010
Query on PRD_900010
C, Dalpha-maltotetraoseOligosaccharide /  Substrate analog

--

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.212 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 111.87α = 90
b = 117.32β = 90
c = 112.61γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
CCP4data scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-07-25
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary