4MON

ORTHORHOMBIC MONELLIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Work: 0.150 

wwPDB Validation 3D Report Full Report


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.,Sect.D 53: 713-719

  • DOI: 10.1107/S0907444997006860

  • 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 ...

    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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MONELLIN
A, C
45Dioscoreophyllum cumminsiiMutation(s): 0 
Find proteins for P02881 (Dioscoreophyllum cumminsii)
Go to UniProtKB:  P02881
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MONELLIN
B, D
50Dioscoreophyllum cumminsiiMutation(s): 0 
Find proteins for P02882 (Dioscoreophyllum cumminsii)
Go to UniProtKB:  P02882
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Work: 0.150 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 54.000α = 90.00
b = 112.420β = 90.00
c = 40.050γ = 90.00
Software Package:
Software NamePurpose
PROFFTrefinement
XENGENdata reduction
XENGENdata scaling
MERLOTphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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