1FTG

STRUCTURE OF APOFLAVODOXIN: CLOSURE OF A TYROSINE/TRYPTOPHAN AROMATIC GATE LEADS TO A COMPACT FOLD

• PDB DOI: https://doi.org/10.2210/pdb1FTG/pdb

• Classification: ELECTRON TRANSPORT
• Organism(s): Nostoc sp. PCC 7119
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1995-11-21 Released: 1996-12-23 
• Deposition Author(s): Romero, A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.182 
• R-Value Observed: 0.182 

Literature

Closure of a tyrosine/tryptophan aromatic gate leads to a compact fold in apo flavodoxin.

Genzor, C.G., Perales-Alcon, A., Sancho, J., Romero, A.

(1996) Nat Struct Biol 3: 329-332

• PubMed: 8599758 
• DOI: https://doi.org/10.1038/nsb0496-329
• Primary Citation of Related Structures:  
  1FTG

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 18.86 kDa 
• Atom Count: 1,425 
• Modelled Residue Count: 168 
• Deposited Residue Count: 168 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
APOFLAVODOXIN	A	168	Nostoc sp. PCC 7119	Mutation(s): 0
UniProt
Find proteins for P0A3E0 (Nostoc sp. (strain ATCC 29151 / PCC 7119)) Explore P0A3E0  Go to UniProtKB:  P0A3E0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	B [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.182 
• R-Value Observed: 0.182 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 55.48	α = 90
b = 38.6	β = 90
c = 60.27	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
MOSFLM	data reduction
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1996-12-23 
Deposition Author(s): Romero, A.

Revision History  

• Version 1.0: 1996-12-23
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Source and taxonomy, Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references, Derived calculations, Other