3IR9 | pdb_00003ir9

C-terminal domain of Peptide Chain Release Factor from Methanosarcina mazei.

• PDB DOI: https://doi.org/10.2210/pdb3IR9/pdb

• Classification: structural genomics, unknown function
• Organism(s): Methanosarcina mazei
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2009-08-21 Released: 2009-09-01 
• Deposition Author(s): Osipiuk, J., Rakowski, E., Freeman, L., Joachimiak, A., Midwest Center for Structural Genomics (MCSG)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.21 Å
• R-Value Free: 
  0.203 (Depositor), 0.201 (DCC) 
• R-Value Work: 
  0.156 (Depositor), 0.157 (DCC) 
• R-Value Observed: 
  0.158 (Depositor) 

Literature

X-ray crystal structure of C-terminal domain of Peptide Chain Release Factor from Methanosarcina mazei.

Osipiuk, J., Rakowski, E., Freeman, L., Joachimiak, A.

To be published.

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: 36.34 kDa 
• Atom Count: 2,476 
• Modeled Residue Count: 319 
• Deposited Residue Count: 332 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Peptide chain release factor subunit 1	A, B	166	Methanosarcina mazei	Mutation(s): 0  Gene Names: MM_1347, prf1
UniProt
Find proteins for Q8PX75 (Methanosarcina mazei (strain ATCC BAA-159 / DSM 3647 / Goe1 / Go1 / JCM 11833 / OCM 88)) Explore Q8PX75  Go to UniProtKB:  Q8PX75

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	C [auth A], D [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Modified Residue	Modification Type	Formula	2D Diagram
MSE	A, B	MET	Selenomethionine	C5 H11 N O2 Se

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.21 Å
• R-Value Free:  0.203 (Depositor), 0.201 (DCC) 
• R-Value Work:  0.156 (Depositor), 0.157 (DCC) 
• R-Value Observed: 0.158 (Depositor) 

Space Group: H 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 116.124	α = 90
b = 116.124	β = 90
c = 71.454	γ = 120

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
SBC-Collect	data collection
HKL-3000	data reduction
SHELXD	phasing
MLPHARE	phasing
DM	phasing
SOLVE	phasing
RESOLVE	phasing
HKL-3000	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-09-01 
Deposition Author(s): Osipiuk, J., Rakowski, E., Freeman, L., Joachimiak, A., Midwest Center for Structural Genomics (MCSG)

Revision History  

• Version 1.0: 2009-09-01
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2017-11-01
  Changes: Refinement description
• Version 1.3: 2024-10-30
  Changes: Data collection, Database references, Derived calculations, Structure summary