3MDK

Structure of stringent starvation protein A (sspA) from Pseudomonas putida

• PDB DOI: https://doi.org/10.2210/pdb3MDK/pdb

• Classification: transcriptional regulator
• Organism(s): Pseudomonas putida KT2440
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2010-03-30 Released: 2010-05-12 
• Deposition Author(s): Ramagopal, U.A., Toro, R., Burley, S.K., Almo, S.C., New York SGX Research Center for Structural Genomics (NYSGXRC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free: 0.258 
• R-Value Work: 0.216 
• R-Value Observed: 0.218 

Literature

Structure of stringent starvation protein A (sspA) from Pseudomonas putida

Ramagopal, U.A., Toro, R., Burley, S.K., Almo, S.C.

To be published.

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 50.28 kDa 
• Atom Count: 3,334 
• Modelled Residue Count: 406 
• Deposited Residue Count: 434 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Stringent starvation protein A	A, B	217	Pseudomonas putida KT2440	Mutation(s): 0  Gene Names: PP1320, sspA
UniProt
Find proteins for Q88N92 (Pseudomonas putida (strain ATCC 47054 / DSM 6125 / CFBP 8728 / NCIMB 11950 / KT2440)) Explore Q88N92  Go to UniProtKB:  Q88N92

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free: 0.258 
• R-Value Work: 0.216 
• R-Value Observed: 0.218 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 108.06	α = 90
b = 48.916	β = 107.24
c = 91.388	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
CBASS	data collection
HKL-2000	data reduction
SHELXE	model building
SHELXD	phasing
CCP4	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-05-12 
Deposition Author(s): Ramagopal, U.A., Toro, R., Burley, S.K., Almo, S.C., New York SGX Research Center for Structural Genomics (NYSGXRC)

Revision History  

• Version 1.0: 2010-05-12
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Refinement description, Version format compliance
• Version 1.2: 2017-11-08
  Changes: Refinement description
• Version 1.3: 2021-02-10
  Changes: Database references, Derived calculations, Structure summary
• Version 1.4: 2024-11-20
  Changes: Data collection, Database references, Structure summary