1VIW

TENEBRIO MOLITOR ALPHA-AMYLASE-INHIBITOR COMPLEX

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.230 

wwPDB Validation   3D Report Full Report


This is version 3.1 of the entry. See complete history. 


Literature

A plant-seed inhibitor of two classes of alpha-amylases: X-ray analysis of Tenebrio molitor larvae alpha-amylase in complex with the bean Phaseolus vulgaris inhibitor.

Nahoum, V., Farisei, F., Le-Berre-Anton, V., Egloff, M.P., Rouge, P., Poerio, E., Payan, F.

(1999) Acta Crystallogr D Biol Crystallogr 55: 360-362

  • DOI: https://doi.org/10.1107/S0907444998010701
  • Primary Citation of Related Structures:  
    1VIW

  • PubMed Abstract: 

    The alpha-amylase from Tenebrio molitor larvae (TMA) has been crystallized in complex with the alpha-amylase inhibitor (alpha-AI) from the bean Phaseolus vulgaris. A molecular-replacement solution of the structure was obtained using the refined pig pancreatic alpha-amylase (PPA) and alpha-AI atomic coordinates as starting models. The structural analysis showed that although TMA has the typical structure common to alpha-amylases, large deviations from the mammalian alpha-amylase models occur in the loops. Despite these differences in the interacting loops, the bean inhibitor is still able to inhibit both the insect and mammalian alpha-amylase.

    • Organizational Affiliation: 

    AFMB-IBSM-CNRS, 31 Chemin Joseph Aiguier, 13402 Marseille CEDEX 20, France.


Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ALPHA-AMYLASE471Tenebrio molitorMutation(s): 0 
EC: 3.2.1.1
UniProt
Find proteins for P56634 (Tenebrio molitor)
Explore P56634 
Go to UniProtKB:  P56634
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP56634
Sequence Annotations
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
ALPHA-AMYLASE-INHIBITOR205Phaseolus vulgarisMutation(s): 0 
UniProt
Find proteins for P02873 (Phaseolus vulgaris)
Explore P02873 
Go to UniProtKB:  P02873
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02873
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C, D
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA
Download Ideal Coordinates CCD File 
F [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
CL
Query on CL
Download Ideal Coordinates CCD File 
E [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
PCA
Query on PCA
A
L-PEPTIDE LINKINGC5 H7 N O3GLN
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.230 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 168.475α = 90
b = 75.911β = 101.29
c = 61.989γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
X-PLORrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-07-22
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2016-03-30
    Changes: Other
  • Version 2.0: 2019-12-25
    Changes: Database references, Derived calculations, Polymer sequence
  • Version 3.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary
  • Version 3.1: 2024-04-03
    Changes: Data collection, Database references, Refinement description, Structure summary