1TMQ

STRUCTURE OF TENEBRIO MOLITOR LARVAL ALPHA-AMYLASE IN COMPLEX WITH RAGI BIFUNCTIONAL INHIBITOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.191 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

A novel strategy for inhibition of alpha-amylases: yellow meal worm alpha-amylase in complex with the Ragi bifunctional inhibitor at 2.5 A resolution.

Strobl, S.Maskos, K.Wiegand, G.Huber, R.Gomis-Ruth, F.X.Glockshuber, R.

(1998) Structure 6: 911-921

  • DOI: 10.1016/s0969-2126(98)00092-6
  • Primary Citation of Related Structures:  
    1TMQ

  • PubMed Abstract: 
  • alpha-Amylases catalyze the hydrolysis of alpha-D-(1,4)-glucan linkages in starch and related compounds. There is a wide range of industrial and medical applications for these enzymes and their inhibitors. The Ragi bifunctional alpha-amylase/trypsin inhibitor (RBI) is the prototype of the cereal inhibitor superfamily and is the only member of this family that inhibits both trypsin and alpha-amylases ...

    alpha-Amylases catalyze the hydrolysis of alpha-D-(1,4)-glucan linkages in starch and related compounds. There is a wide range of industrial and medical applications for these enzymes and their inhibitors. The Ragi bifunctional alpha-amylase/trypsin inhibitor (RBI) is the prototype of the cereal inhibitor superfamily and is the only member of this family that inhibits both trypsin and alpha-amylases. The mode of inhibition of alpha-amylases by these cereal inhibitors has so far been unknown.


    Related Citations: 
    • The Alpha-Amylase from the Yellow Meal Worm: Complete Primary Structure, Crystallization and Preliminary X-Ray Analysis
      Strobl, S., Gomis-Ruth, F.X., Maskos, K., Frank, G., Huber, R., Glockshuber, R.
      (1997) FEBS Lett 409: 109

    Organizational Affiliation

    Institut für Molekularbiologie und Biophysik, Eidgenössische Technische Hochschule Hönggerberg, Zürich, Switzerland.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (ALPHA-AMYLASE) A471Tenebrio molitorMutation(s): 0 
EC: 3.2.1.1
Find proteins for P56634 (Tenebrio molitor)
Explore P56634 
Go to UniProtKB:  P56634
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (RAGI BIFUNCTIONAL INHIBITOR) B117Eleusine coracanaMutation(s): 0 
Find proteins for P01087 (Eleusine coracana)
Explore P01087 
Go to UniProtKB:  P01087
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download Ideal Coordinates CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
AL-PEPTIDE LINKINGC5 H7 N O3GLN
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.191 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.16α = 90
b = 186.87β = 90
c = 111.54γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
CCP4data reduction
AMoREphasing
X-PLORrefinement
CCP4data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-03-02
    Type: Initial release
  • Version 1.1: 2008-04-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-11-20
    Changes: Database references, Derived calculations
  • Version 2.0: 2019-12-25
    Changes: Database references, Derived calculations, Polymer sequence