Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 44.97 kDa 
• Atom Count: 3182 
• Modelled Residue Count: 368 
• Deposited Residue Count: 386 
• Unique protein chains: 1

2MJP

STRUCTURE-BASED IDENTIFICATION OF THE BIOCHEMICAL FUNCTION OF A HYPOTHETICAL PROTEIN FROM METHANOCOCCUS JANNASCHII:MJ0226

• PDB DOI: 10.2210/pdb2MJP/pdb

• Classification: STRUCTURAL GENOMICS
• Organism(s): Methanocaldococcus jannaschii
• Mutation(s): No 


• Deposited: 1999-01-27 Released: 2000-01-28 
• Deposition Author(s): Hwang, K.Y., Chung, J.H., Han, Y.S., Kim, S.H., Cho, Y., Berkeley Structural Genomics Center (BSGC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.259 
• R-Value Work: 0.204 

Literature

Structure-based identification of a novel NTPase from Methanococcus jannaschii.

Hwang, K.Y., Chung, J.H., Kim, S.H., Han, Y.S., Cho, Y.

(1999) Nat Struct Biol 6: 691-696

• PubMed: 10404228 
• DOI: 10.1038/10745
• Primary Citation of Related Structures:  
  1B78, 2MJP


• PubMed Abstract: 
  

Almost half of the entire set of predicted genomic products from Methanococcus jannaschii are classified as functionally unknown hypothetical proteins. We present a structure-based identification of the biochemical function of a protein with an as yet unknown function from a M. jannaschii gene, Mj0226. The crystal structure of Mj0226 protein determined at 2.2 A resolution reveals that the protein is a homodimer and each monomer folds into an elongated alpha/beta structure of a new fold family. Comparisons of Mj0226 protein with protein structures in the database, however, indicate that one part of the protein is homologous to some of the nucleotide-binding proteins. Biochemical analysis shows that Mj0226 protein is a novel nucleotide triphosphatase that can efficiently hydrolyze nonstandard nucleotides such as XTP to XMP or ITP to IMP, but not the standard nucleotides, in the presence of Mg2+ or Mn2+ ions.

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Organizational Affiliation: 

Structural Biology Center, Korea Institute of Science and Technology, Seoul, South Korea.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PYROPHOSPHATASE	A, B	193	Methanocaldococcus jannaschii	Mutation(s): 0  EC: 3.6.1.66
UniProt
Find proteins for Q57679 (Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440)) Explore Q57679  Go to UniProtKB:  Q57679

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ANP	C [auth A]	PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER C10 H17 N6 O12 P3 PVKSNHVPLWYQGJ-KQYNXXCUSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.259 
• R-Value Work: 0.204 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 44.36	α = 90
b = 72.13	β = 90
c = 140.53	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-01-27 
• Released Date: 2000-01-28 
Deposition Author(s): Hwang, K.Y., Chung, J.H., Han, Y.S., Kim, S.H., Cho, Y., Berkeley Structural Genomics Center (BSGC)

Revision History  

• Version 1.0: 2000-01-28
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance