4MON

ORTHORHOMBIC MONELLIN

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Work: 0.150 

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This is version 1.2 of the entry. See complete history. 


Literature

Structure of monellin refined to 2.3 a resolution in the orthorhombic crystal form.

Bujacz, G., Miller, M., Harrison, R., Thanki, N., Gilliland, G.L., Ogata, C.M., Kim, S.H., Wlodawer, A.

(1997) Acta Crystallogr D Biol Crystallogr 53: 713-719

  • DOI: 10.1107/S0907444997006860
  • Primary Citation of Related Structures:  
    4MON

  • PubMed Abstract: 

    • The structure of orthorhombic crystals of monellin, a sweet protein extracted from African serendipity berries, has been solved by molecular replacement and refined to 2.3 A resolution. The final R factor was 0.150 for a model with excellent geometry. A monellin molecule consists of two peptides that are non-covalently bound, with chain A composed of three beta-strands interconnected by loop regions and chain B composed of two beta-strands interconnected by an alpha-helix ...

    The structure of orthorhombic crystals of monellin, a sweet protein extracted from African serendipity berries, has been solved by molecular replacement and refined to 2.3 A resolution. The final R factor was 0.150 for a model with excellent geometry. A monellin molecule consists of two peptides that are non-covalently bound, with chain A composed of three beta-strands interconnected by loop regions and chain B composed of two beta-strands interconnected by an alpha-helix. The N terminus of chain A is in close proximity to the C terminus of chain B. The two molecules in the asymmetric unit are related by a non-crystallographic twofold axis and form a dimer, similar to those previously observed in other crystal forms of both natural and single-chain monellin. The r.m.s, deviation between the Calpha atoms in the two independent molecules is 0.60 A, while the deviations from the individual molecules in the previously reported monoclinic crystals are 0.50-0.57 A. This result proves that the structure of monellin is not significantly influenced by crystal packing forces.

    Organizational Affiliation: 

    Macromolecular Structure Laboratory, NCI-Frederick Cancer Research and Development Center, ABL-Basic Research Program, MD 21702, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MONELLINA, C45Dioscoreophyllum cumminsiiMutation(s): 0 
UniProt
Find proteins for P02881 (Dioscoreophyllum cumminsii)
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Go to UniProtKB:  P02881
Entity Groups  
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UniProt GroupP02881
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
MONELLINB, D50Dioscoreophyllum cumminsiiMutation(s): 0 
UniProt
Find proteins for P02882 (Dioscoreophyllum cumminsii)
Explore P02882 
Go to UniProtKB:  P02882
Entity Groups  
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UniProt GroupP02882
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Work: 0.150 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54α = 90
b = 112.42β = 90
c = 40.05γ = 90
Software Package:
Software NamePurpose
MERLOTphasing
PROFFTrefinement
XENGENdata reduction
XENGENdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-07-07
    Type: Initial release
  • Version 1.1: 2008-03-25
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance