1KK9 | pdb_00001kk9

CRYSTAL STRUCTURE OF E. COLI YCIO

• PDB DOI: https://doi.org/10.2210/pdb1KK9/pdb

• Classification: UNKNOWN FUNCTION
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21
• Mutation(s): Yes 


• Deposited: 2001-12-06 Released: 2002-12-11 
• Deposition Author(s): Jia, J., Lunin, V.V., Sauve, V., Huang, L.-W., Matte, A., Cygler, M., Montreal-Kingston Bacterial Structural Genomics Initiative (BSGI)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 
  0.233 (Depositor), 0.233 (DCC) 
• R-Value Work: 
  0.213 (Depositor), 0.213 (DCC) 

Literature

Crystal structure of the YciO protein from Escherichia coli

Jia, J., Lunin, V.V., Sauve, V., Huang, L.-W., Matte, A., Cygler, M.

(2002) Proteins 49: 139-141

• PubMed: 12211024 
• DOI: https://doi.org/10.1002/prot.10178
• Primary Citation Related Structures: 
  1KK9

---

Organizational Affiliation: 
• Biotechnology Research Institute, National Research Council of Canada, and Montreal Joint Centre for Structural Biology, Montreal, Quebec, Canada.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 25.29 kDa 
• Atom Count: 1,759 
• Modeled Residue Count: 206 
• Deposited Residue Count: 221 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
probable translation factor yciO	A	221	Escherichia coli	Mutation(s): 8  Gene Names: ycio EC: 2.7.7.87
UniProt
Find proteins for P0AFR4 (Escherichia coli (strain K12)) Explore P0AFR4  Go to UniProtKB:  P0AFR4

Small Molecules

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

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free:  0.233 (Depositor), 0.233 (DCC) 
• R-Value Work:  0.213 (Depositor), 0.213 (DCC) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 48.4	α = 90
b = 68.77	β = 90
c = 94.77	γ = 90

Software Package:

Software Name	Purpose
Adxv	data processing
SCALEPACK	data scaling
SOLVE	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2002-12-11 
Deposition Author(s): Jia, J., Lunin, V.V., Sauve, V., Huang, L.-W., Matte, A., Cygler, M., Montreal-Kingston Bacterial Structural Genomics Initiative (BSGI)

Revision History  

• Version 1.0: 2002-12-11
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-10-11
  Changes: Refinement description
• Version 1.4: 2024-11-20
  Changes: Data collection, Database references, Derived calculations, Structure summary