1AHB

THE N-GLYCOSIDASE MECHANISM OF RIBOSOME-INACTIVATING PROTEINS IMPLIED BY CRYSTAL STRUCTURES OF ALPHA-MOMORCHARIN

• PDB DOI: https://doi.org/10.2210/pdb1AHB/pdb

• Classification: GLYCOSIDASE
• Organism(s): Momordica charantia
• Mutation(s): No 


• Deposited: 1994-01-07 Released: 1994-06-22 
• Deposition Author(s): Ren, J., Wang, Y., Dong, Y., Stuart, D.I.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Work: 0.175 
• R-Value Observed: 0.175 

Literature

The N-glycosidase mechanism of ribosome-inactivating proteins implied by crystal structures of alpha-momorcharin.

Ren, J., Wang, Y., Dong, Y., Stuart, D.I.

(1994) Structure 2: 7-16

• PubMed: 8075985 
• DOI: https://doi.org/10.1016/s0969-2126(00)00004-6
• Primary Citation of Related Structures:  
  1AHA, 1AHB, 1AHC


• PubMed Abstract: 
  

  alpha-Momorcharin (alpha MMC) is a type I ribosome-inactivating protein. It inhibits protein synthesis by hydrolytically removing a specific adenine residue from a highly conserved, single-stranded loop of rRNA.

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Organizational Affiliation: 

Oxford Centre for Molecular Sciences, UK.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 27.74 kDa 
• Atom Count: 2,036 
• Modelled Residue Count: 246 
• Deposited Residue Count: 246 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ALPHA-MOMORCHARIN	A	246	Momordica charantia	Mutation(s): 0  EC: 3.2.2.22
UniProt
Find proteins for P16094 (Momordica charantia) Explore P16094  Go to UniProtKB:  P16094

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FMP	B [auth A]	FORMYCIN-5'-MONOPHOSPHATE C10 H14 N5 O7 P PBAHXXBYQACZMA-KSYZLYKTSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Work: 0.175 
• R-Value Observed: 0.175 
• Space Group: H 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 131.4	α = 90
b = 131.4	β = 90
c = 49.8	γ = 120

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-06-22 
Deposition Author(s): Ren, J., Wang, Y., Dong, Y., Stuart, D.I.

Revision History  

• Version 1.0: 1994-06-22
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references, Derived calculations, Other