8ROM

Crystal structure of human FAD synthase PAPS domain in complex with FAD

• PDB DOI: https://doi.org/10.2210/pdb8ROM/pdb

• Classification: FLAVOPROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2024-01-11 Released: 2024-04-10 
• Deposition Author(s): Leo, G., Capaldi, S.
• Funding Organization(s): Ministero dell Universita e della Ricerca

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.69 Å
• R-Value Free: 0.207 
• R-Value Work: 0.181 
• R-Value Observed: 0.183 

Literature

Structural insights into the bifunctional enzyme human FAD synthase

Leo, G., Leone, P., Ataie Kachoiie, E., Tolomeo, M., Galluccio, M., Indiveri, C., Barile, M., Capaldi, S.

(2024) Structure 

Biological Assembly 1  

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 23.7 kDa 
• Atom Count: 1,732 
• Modelled Residue Count: 194 
• Deposited Residue Count: 202 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FAD synthase	A	202	Homo sapiens	Mutation(s): 0  Gene Names: FLAD1, PP591 EC: 2.7.7.2
UniProt & NIH Common Fund Data Resources
Find proteins for Q8NFF5 (Homo sapiens) Explore Q8NFF5  Go to UniProtKB:  Q8NFF5
PHAROS:  Q8NFF5 GTEx:  ENSG00000160688

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FAD (Subject of Investigation/LOI)	B [auth A]	FLAVIN-ADENINE DINUCLEOTIDE C27 H33 N9 O15 P2 VWWQXMAJTJZDQX-UYBVJOGSSA-N
PO4	C [auth A], D [auth A]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.69 Å
• R-Value Free: 0.207 
• R-Value Work: 0.181 
• R-Value Observed: 0.183 
• Space Group: I 2 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 63.959	α = 90
b = 69.731	β = 90
c = 105.33	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
autoPROC	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-04-10 
Deposition Author(s): Leo, G., Capaldi, S.

---

Funding Organization	Location	Grant Number
Ministero dell Universita e della Ricerca	Italy	PE_00000019 "HEAL ITALIA"

Revision History  

• Version 1.0: 2024-04-10
  Type: Initial release