6KU6 | pdb_00006ku6

OSM1 mutant - R326A

• PDB DOI: https://doi.org/10.2210/pdb6KU6/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Saccharomyces cerevisiae S288C
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2019-08-30 Released: 2020-07-08 
• Deposition Author(s): Park, H.H., Kim, C.M.
• Funding Organization(s): National Research Foundation (Korea)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.01 Å
• R-Value Free: 
  0.251 (Depositor), 0.244 (DCC) 
• R-Value Work: 
  0.200 (Depositor) 
• R-Value Observed: 
  0.201 (Depositor) 

Literature

Crystal Structure of the Active Site Mutant Form of Soluble Fumarate Reductase, Osm1

Kim, C.M., Kwon, S., Jung, K.H., Park, H.H.

(2019) Crystals (Basel) 

• DOI: https://doi.org/10.3390/cryst9100504

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: light scattering

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 104.83 kDa 
• Atom Count: 7,943 
• Modeled Residue Count: 942 
• Deposited Residue Count: 942 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Fumarate reductase 2	A [auth B], B [auth H]	471	Saccharomyces cerevisiae S288C	Mutation(s): 1  Gene Names: OSM1, YJR051W, J1659 EC: 1.3.1.6
UniProt
Find proteins for P21375 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P21375  Go to UniProtKB:  P21375

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FAD (Subject of Investigation/LOI)	C [auth B], E [auth H]	FLAVIN-ADENINE DINUCLEOTIDE C27 H33 N9 O15 P2 VWWQXMAJTJZDQX-UYBVJOGSSA-N
SIN	D [auth B], F [auth H]	SUCCINIC ACID C4 H6 O4 KDYFGRWQOYBRFD-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.01 Å
• R-Value Free:  0.251 (Depositor), 0.244 (DCC) 
• R-Value Work:  0.200 (Depositor) 
• R-Value Observed: 0.201 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.924	α = 90
b = 109.924	β = 98.52
c = 77.142	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2020-07-08 
Deposition Author(s): Park, H.H., Kim, C.M.

---

Funding Organization	Location	Grant Number
National Research Foundation (Korea)	Korea, Republic Of	--

Revision History  

• Version 1.0: 2020-07-08
  Type: Initial release
  
• Version 1.1: 2025-04-09
  Changes: Data collection, Database references, Structure summary
• Version 1.2: 2025-09-17
  Changes: Advisory, Derived calculations