1CLV

YELLOW MEAL WORM ALPHA-AMYLASE IN COMPLEX WITH THE AMARANTH ALPHA-AMYLASE INHIBITOR

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.161 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history. 


Literature

Specific inhibition of insect alpha-amylases: yellow meal worm alpha-amylase in complex with the amaranth alpha-amylase inhibitor at 2.0 A resolution.

Pereira, P.J., Lozanov, V., Patthy, A., Huber, R., Bode, W., Pongor, S., Strobl, S.

(1999) Structure 7: 1079-1088

  • DOI: 10.1016/s0969-2126(99)80175-0
  • Primary Citation of Related Structures:  
    1CLV

  • PubMed Abstract: 

    • alpha-Amylases constitute a family of enzymes that catalyze the hydrolysis of alpha-D-(1,4)-glucan linkages in starch and related polysaccharides. The Amaranth alpha-amylase inhibitor (AAI) specifically inhibits alpha-amylases from insects, but not from mammalian sources ...

    alpha-Amylases constitute a family of enzymes that catalyze the hydrolysis of alpha-D-(1,4)-glucan linkages in starch and related polysaccharides. The Amaranth alpha-amylase inhibitor (AAI) specifically inhibits alpha-amylases from insects, but not from mammalian sources. AAI is the smallest proteinaceous alpha-amylase inhibitor described so far and has no known homologs in the sequence databases. Its mode of inhibition of alpha-amylases was unknown until now.

    Organizational Affiliation: 

    Max-Planck-Institut für Biochemie Am Klopferspitz 18a, 82152, Planegg, Germany.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (ALPHA-AMYLASE)A471Tenebrio molitorMutation(s): 0 
EC: 3.2.1.1
UniProt
Find proteins for P56634 (Tenebrio molitor)
Explore P56634 
Go to UniProtKB:  P56634
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (ALPHA-AMYLASE INHIBITOR)B [auth I]32N/AMutation(s): 0 
UniProt
Find proteins for P80403 (Amaranthus hypochondriacus)
Explore P80403 
Go to UniProtKB:  P80403
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 
 C [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
CL
Query on CL
Download Ideal Coordinates CCD File 
 D [auth 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
Binding Affinity Annotations 
IDSourceBinding Affinity
AAI PDBBind:  1CLV Kd: 1 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.161 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 119.25α = 90
b = 119.25β = 90
c = 64.78γ = 120
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: 2000-05-03
    Type: Initial release
  • Version 1.1: 2007-10-16
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2019-12-25
    Changes: Advisory, Database references, Derived calculations, Polymer sequence