1L1S

Structure of Protein of Unknown Function MTH1491 from Methanobacterium thermoautotrophicum

• PDB DOI:  https://doi.org/10.2210/pdb1L1S/pdb

• Classification: STRUCTURAL GENOMICS, UNKNOWN FUNCTION
• Organism(s): Methanothermobacter thermautotrophicus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2002-02-19 Released: 2002-05-29 
• Deposition Author(s): Christendat, D., Saridakis, V., Kim, Y., Kumar, P.A., Xu, X., Semesi, A., Joachimiak, A., Arrowsmith, C.H., Edwards, A.M., Midwest Center for Structural Genomics (MCSG)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.226 
• R-Value Work: 0.202 
• R-Value Observed: 0.202 

Literature

The crystal structure of hypothetical protein MTH1491 from Methanobacterium thermoautotrophicum.

Christendat, D., Saridakis, V., Kim, Y., Kumar, P.A., Xu, X., Semesi, A., Joachimiak, A., Arrowsmith, C.H., Edwards, A.M.

(2002) Protein Sci 11: 1409-1414

• PubMed: 12021439 
• DOI: https://doi.org/10.1110/ps.4720102
• Primary Citation of Related Structures:  
  1L1S


• PubMed Abstract: 
  

As part of our structural proteomics initiative, we have determined the crystal structure of MTH1491, a previously uncharacterized hypothetical protein from Methanobacterium thermoautotrophicum. MTH1491 is one of numerous structural genomics targets selected in a genome-wide survey of uncharacterized proteins. It belongs to a family of proteins whose biological function is not known. The crystal structure of MTH1491, the first structure for this family of proteins, consists of an overall five-stranded parallel beta-sheet with strand order 51234 and flanking helices. The oligomeric form of this molecule is a trimer as seen from both crystal contacts and gel filtration studies. Analysis revealed that the structure of MTH1491 is similar to that of dehydrogenases, amidohydrolases, and oxidoreductases. Using a combination of sequence and structural analyses, we showed that MTH1491 does not belong to either the dehydrogenase or the amidohydrolase superfamilies of proteins.

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Organizational Affiliation: 

Clinical Genomics Center, University Health Network, Toronto, Ontario, M5G 1L7, Canada. [e-mail]

Biological Assembly 1  

Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

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

Macromolecule Content

• Total Structure Weight: 12.75 kDa 
• Atom Count: 881 
• Modelled Residue Count: 111 
• Deposited Residue Count: 113 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
hypothetical protein MTH1491	A	113	Methanothermobacter thermautotrophicus	Mutation(s): 4  Gene Names: ORF1491
UniProt
Find proteins for O27535 (Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H)) Explore O27535  Go to UniProtKB:  O27535

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.226 
• R-Value Work: 0.202 
• R-Value Observed: 0.202 
• Space Group: P 6₃

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 82.44	α = 90
b = 82.44	β = 90
c = 37.04	γ = 120

Software Package:

Software Name	Purpose
d*TREK	data scaling
SCALEPACK	data scaling
CNS	refinement
d*TREK	data reduction
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2002-05-29 
Deposition Author(s): Christendat, D., Saridakis, V., Kim, Y., Kumar, P.A., Xu, X., Semesi, A., Joachimiak, A., Arrowsmith, C.H., Edwards, A.M., Midwest Center for Structural Genomics (MCSG)

Revision History  

• Version 1.0: 2002-05-29
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2017-10-11
  Changes: Refinement description