2NLV

CRYSTAL STRUCTURE OF A XISI-LIKE PROTEIN (AVA_3825) FROM ANABAENA VARIABILIS ATCC 29413 AT 1.30 A RESOLUTION

• PDB DOI: https://doi.org/10.2210/pdb2NLV/pdb

• Classification: UNKNOWN FUNCTION
• Organism(s): Trichormus variabilis ATCC 29413
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2006-10-20 Released: 2006-12-05 
• Deposition Author(s): Joint Center for Structural Genomics (JCSG)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.30 Å
• R-Value Free: 0.195 
• R-Value Work: 0.175 
• R-Value Observed: 0.176 

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)

Macromolecule Content

• Total Structure Weight: 26.87 kDa 
• Atom Count: 2,363 
• 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	Trichormus variabilis ATCC 29413	Mutation(s): 0  Gene Names: YP_324325.1
UniProt
Find proteins for Q3M6F6 (Trichormus variabilis (strain ATCC 29413 / PCC 7937)) Explore Q3M6F6  Go to UniProtKB:  Q3M6F6

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CL	C [auth A], D [auth A], E [auth A], F [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

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: 1.30 Å
• R-Value Free: 0.195 
• R-Value Work: 0.175 
• R-Value Observed: 0.176 
• Space Group: P 1 2₁ 1
• Diffraction Data: https://doi.org/10.18430/M32NLV

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 46.779	α = 90
b = 37.354	β = 97.22
c = 63.453	γ = 90

Software Package:

Software Name	Purpose
MolProbity	model building
REFMAC	refinement
SCALA	data scaling
PDB_EXTRACT	data extraction
MOSFLM	data reduction
CCP4	data scaling
SOLVE	phasing
RESOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2006-12-05 
Deposition Author(s): Joint Center for Structural Genomics (JCSG)

Revision History  

• Version 1.0: 2006-12-05
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Source and taxonomy, Version format compliance
• Version 1.3: 2014-09-10
  Changes: Database references, Other, Structure summary
• Version 1.4: 2014-09-24
  Changes: Database references
• Version 1.5: 2017-10-18
  Changes: Advisory, Refinement description
• Version 1.6: 2023-01-25
  Changes: Advisory, Database references, Derived calculations
• Version 1.7: 2024-11-20
  Changes: Data collection, Structure summary