3P01 | pdb_00003p01

Crystal structure of two-component response regulator from Nostoc sp. PCC 7120

• PDB DOI: https://doi.org/10.2210/pdb3P01/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Nostoc sp. PCC 7120 = FACHB-418
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2010-09-27 Released: 2010-10-06 
• Deposition Author(s): Chang, C., Mack, J., Feldman, B., Joachimiak, A., Midwest Center for Structural Genomics (MCSG)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.65 Å
• R-Value Free: 
  0.268 (Depositor), 0.263 (DCC) 
• R-Value Work: 
  0.228 (Depositor), 0.227 (DCC) 
• R-Value Observed: 
  0.230 (Depositor) 

Literature

Crystal structure of two-component response regulator from Nostoc sp. PCC 7120

Chang, C., Mack, J., Feldman, B., Joachimiak, A.

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)

Biological Assembly 2  

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

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

Macromolecule Content 

• Total Structure Weight: 60.88 kDa 
• Atom Count: 3,934 
• Modeled Residue Count: 522 
• Deposited Residue Count: 552 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Two-component response regulator	A, B, C	184	Nostoc sp. PCC 7120 = FACHB-418	Mutation(s): 0  Gene Names: alr5251

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.65 Å
• R-Value Free:  0.268 (Depositor), 0.263 (DCC) 
• R-Value Work:  0.228 (Depositor), 0.227 (DCC) 
• R-Value Observed: 0.230 (Depositor) 

Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 111.876	α = 90
b = 111.876	β = 90
c = 112.837	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
SBC-Collect	data collection
HKL-3000	data reduction
HKL-3000	data scaling
HKL-3000	phasing
SHELXD	phasing
SHELXE	model building
MLPHARE	phasing
DM	phasing
RESOLVE	phasing
Coot	model building
ARP/wARP	model building

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-10-06 
Deposition Author(s): Chang, C., Mack, J., Feldman, B., Joachimiak, A., Midwest Center for Structural Genomics (MCSG)

Revision History  

• Version 1.0: 2010-10-06
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2024-10-16
  Changes: Data collection, Database references, Derived calculations, Structure summary