3D7Q

Crystal structure of a xisi-like protein (npun_ar114) from nostoc punctiforme pcc 73102 at 2.30 A resolution

• PDB DOI: https://doi.org/10.2210/pdb3D7Q/pdb

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


• Deposited: 2008-05-21 Released: 2008-06-17 
• Deposition Author(s): Joint Center for Structural Genomics (JCSG)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.259 
• R-Value Work: 0.206 
• R-Value Observed: 0.208 

Literature

Site-specific recombination of nitrogen-fixation genes in cyanobacteria by XisF-XisH-XisI complex: Structures and models.

Hwang, W.C., Golden, J.W., Pascual, J., Xu, D., Cheltsov, A., Godzik, A.

(2014) Proteins 

• DOI: https://doi.org/10.1002/prot.24679

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: 26.96 kDa 
• Atom Count: 1,915 
• Modelled Residue Count: 221 
• Deposited Residue Count: 224 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
XisI protein-like	A, B	112	Nostoc punctiforme PCC 73102	Mutation(s): 0  Gene Names: ZP_00106052.1
UniProt
Find proteins for B2JAN5 (Nostoc punctiforme (strain ATCC 29133 / PCC 73102)) Explore B2JAN5  Go to UniProtKB:  B2JAN5

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: 2.30 Å
• R-Value Free: 0.259 
• R-Value Work: 0.206 
• R-Value Observed: 0.208 
• Space Group: P 4₃ 2₁ 2
• Diffraction Data: https://doi.org/10.18430/M33D7Q

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 79.846	α = 90
b = 79.846	β = 90
c = 74.256	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
PHENIX	refinement
SHELX	phasing
MolProbity	model building
SCALA	data scaling
PDB_EXTRACT	data extraction
MOSFLM	data reduction
SHELXD	phasing
autoSHARP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-06-17 
Deposition Author(s): Joint Center for Structural Genomics (JCSG)

Revision History  

• Version 1.0: 2008-06-17
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.2: 2014-09-10
  Changes: Database references
• Version 1.3: 2015-10-14
  Changes: Database references
• Version 1.4: 2015-12-23
  Changes: Database references
• Version 1.5: 2017-10-25
  Changes: Refinement description
• Version 1.6: 2019-07-24
  Changes: Data collection, Database references, Derived calculations, Refinement description