Biological Assembly 1  

 3D View: Structure | Electron Density

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: 20.85 kDa 
• Atom Count: 1036 
• Modelled Residue Count: 137 
• Deposited Residue Count: 194 
• Unique protein chains: 1

1PM3

MTH1859

• DOI: 10.2210/pdb1PM3/pdb

• Classification: UNKNOWN FUNCTION
• Organism(s): Methanothermobacter thermautotrophicus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-06-09 Released: 2003-08-12 
• Deposition Author(s): Ye, H., Steegborn, C., Wu, H., Northeast Structural Genomics Consortium (NESG)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.15 Å
• R-Value Free: 0.293 
• R-Value Work: 0.255 
• R-Value Observed: 0.258 

Literature

Crystal structure of the putative adapter protein MTH1859.

Ye, H., Chen, T.C., Xu, X., Pennycooke, M., Wu, H., Steegborn, C.

(2004) J Struct Biol 148: 251-256

• PubMed: 15477104 
• DOI: 10.1016/j.jsb.2004.06.004
• Primary Citation of Related Structures:  
  1PM3


• PubMed Abstract: 
  

MTH1859 from Methanobacterium thermoautotrophicum is a 77 residue protein representing a conserved family of functionally uncharacterized proteins. We solved the crystal structure of MTH1859 by single wavelength anomalous diffraction phasing using selenomethionine labeled protein. MTH1859 adopts a mainly anti-parallel all-beta-fold. The beta-sheet is heavily bent to form a U-structure that is closed through a loop. The monomer structure possesses similarities to the photoreaction center (PRC) domain fold, but the protein employs a unique oligomerization scheme. Two monomers of MTH1859 occupy the asymmetric unit and dimerize in a head-to-head fashion. Crystal packing interactions identify a second protein-protein interaction interface at the MTH1859 tails which can simultaneously bind two partner molecules. These interactions lead to the formation of a honeycomb structure and suggest that the family of MTH1859-like proteins might function as adapters for protein complex assembly.

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Organizational Affiliation: 

Department of Biochemistry, Weill Medical College of Cornell University, 1300 York Avenue, New York, NY 10021, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MTH1895	A, B	97	Methanothermobacter thermautotrophicus	Mutation(s): 0
UniProt
Find proteins for O27887 (Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H)) Explore O27887  Go to UniProtKB:  O27887

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.15 Å
• R-Value Free: 0.293 
• R-Value Work: 0.255 
• R-Value Observed: 0.258 
• Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 154.7	α = 90
b = 154.7	β = 90
c = 68.9	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-06-09 
• Released Date: 2003-08-12 
Deposition Author(s): Ye, H., Steegborn, C., Wu, H., Northeast Structural Genomics Consortium (NESG)

Revision History  

• Version 1.0: 2003-08-12
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance