1MOM

CRYSTAL STRUCTURE OF MOMORDIN, A TYPE I RIBOSOME INACTIVATING PROTEIN FROM THE SEEDS OF MOMORDICA CHARANTIA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.16 Å
  • R-Value Observed: 0.186 

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Literature

Crystal structure of momordin, a type I ribosome inactivating protein from the seeds of Momordica charantia.

Husain, J.Tickle, I.J.Wood, S.P.

(1994) FEBS Lett 342: 154-158

  • DOI: 10.1016/0014-5793(94)80491-5
  • Primary Citation of Related Structures:  
    1MOM

  • PubMed Abstract: 
  • A type I ribosome-inactivating protein, extracted and purified from M. charantia seeds, was crystallised by vapour diffusion with polyethylene glycol at pH 7.2. X-ray data were collected to 2.1 A resolution and the structure solved by molecular replaceme ...

    A type I ribosome-inactivating protein, extracted and purified from M. charantia seeds, was crystallised by vapour diffusion with polyethylene glycol at pH 7.2. X-ray data were collected to 2.1 A resolution and the structure solved by molecular replacement using the A-chain coordinates of ricin. The overall fold of the protein is similar to ricin but there are differences in secondary structure, on the surface and in the active site cleft. These differences are probably due in part to the evolution of the protein without a B-chain partner. The most extensive reorganisation occurs at the C-terminus whereas Tyr70 shows the greatest change in the active site cleft.


    Organizational Affiliation

    Department of Crystallography, Birkbeck College, London, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MOMORDIN A246Momordica charantiaMutation(s): 0 
EC: 3.2.2.22
Find proteins for P16094 (Momordica charantia)
Explore P16094 
Go to UniProtKB:  P16094
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
B
2 N-Glycosylation Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.16 Å
  • R-Value Observed: 0.186 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 131.17α = 90
b = 131.17β = 90
c = 40.75γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
PROLSQrefinement
RESTRAINrefinement
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-05-31
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Structure summary