2QZI

The crystal structure of a conserved protein of unknown function from Streptococcus thermophilus LMG 18311.

• PDB DOI: https://doi.org/10.2210/pdb2QZI/pdb

• Classification: STRUCTURAL GENOMICS, UNKNOWN FUNCTION
• Organism(s): Streptococcus thermophilus LMG 18311
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2007-08-16 Released: 2007-08-28 
• Deposition Author(s): Tan, K., Zhou, M., Freeman, L., Joachimiak, A., Midwest Center for Structural Genomics (MCSG)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.251 
• R-Value Work: 0.210 
• R-Value Observed: 0.212 

Literature

The crystal structure of a conserved protein of unknown function from Streptococcus thermophilus LMG 18311.

Tan, K., Zhou, M., Freeman, L., Joachimiak, A.

To be published.

Biological Assembly 1  

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

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

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly 3  

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

Biological assembly 3 assigned by authors and generated by PISA (software)

Biological Assembly 4  

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

Biological assembly 4 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 48.56 kDa 
• Atom Count: 3,526 
• Modelled Residue Count: 401 
• Deposited Residue Count: 412 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Uncharacterized protein	A, B, C, D	103	Streptococcus thermophilus LMG 18311	Mutation(s): 0  Gene Names: stu0600
UniProt
Find proteins for Q5M594 (Streptococcus thermophilus (strain ATCC BAA-250 / LMG 18311)) Explore Q5M594  Go to UniProtKB:  Q5M594

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EDO	J [auth B]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
NA	E [auth A], F [auth A], G [auth B], H [auth B], I [auth B], K [auth C], L [auth C]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.251 
• R-Value Work: 0.210 
• R-Value Observed: 0.212 
• Space Group: P 6₄ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 150.783	α = 90
b = 150.783	β = 90
c = 103.247	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
SBC-Collect	data collection
HKL-3000	data reduction
HKL-3000	data scaling
HKL-3000	phasing
SHELXD	phasing
MLPHARE	phasing
DM	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-08-28 
Deposition Author(s): Tan, K., Zhou, M., Freeman, L., Joachimiak, A., Midwest Center for Structural Genomics (MCSG)

Revision History  

• Version 1.0: 2007-08-28
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Source and taxonomy, Version format compliance
• Version 1.2: 2024-10-30
  Changes: Data collection, Database references, Derived calculations, Structure summary