3E56

The 2.0 Angstrom Resolution Crystal Structure of NpR1517, a Putative Heterocyst Differentiation Inhibitor from Nostoc punctiforme

• PDB DOI: https://doi.org/10.2210/pdb3E56/pdb

• Classification: UNKNOWN FUNCTION
• Organism(s): Nostoc punctiforme PCC 73102
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2008-08-13 Released: 2009-01-20 
• Deposition Author(s): Kennedy, M.A., Ni, S., Smola, M.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.01 Å
• R-Value Free: 0.237 
• R-Value Work: 0.188 
• R-Value Observed: 0.190 

Literature

Crystal structure of Npun_R1517, a putative negative regulator of heterocyst differentiation from Nostoc punctiforme PCC 73102.

Ni, S., Benning, M.M., Smola, M.J., Feldmann, E.A., Kennedy, M.A.

(2008) Proteins 74: 794-798

• PubMed: 19089958 
• DOI: https://doi.org/10.1002/prot.22308
• Primary Citation of Related Structures:  
  3E56

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Organizational Affiliation: 

Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio 45056, USA.

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: 12.92 kDa 
• Atom Count: 670 
• Modelled Residue Count: 75 
• Deposited Residue Count: 113 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Putative uncharacterized protein	A	113	Nostoc punctiforme PCC 73102	Mutation(s): 0  Gene Names: Npun_R1517
UniProt
Find proteins for B2IZS7 (Nostoc punctiforme (strain ATCC 29133 / PCC 73102)) Explore B2IZS7  Go to UniProtKB:  B2IZS7

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.01 Å
• R-Value Free: 0.237 
• R-Value Work: 0.188 
• R-Value Observed: 0.190 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 56.336	α = 90
b = 56.336	β = 90
c = 56.491	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
PROTEUM2	data collection
SAINT	data reduction
SADABS	data scaling
SHELXS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-01-20 
Deposition Author(s): Kennedy, M.A., Ni, S., Smola, M.J.

Revision History  

• Version 1.0: 2009-01-20
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Source and taxonomy, Version format compliance
• Version 1.2: 2024-02-21
  Changes: Data collection, Database references, Refinement description