Macromolecule Content

• Total Structure Weight: 8.59 kDa 
• Atom Count: 597 
• Residue Count: 74 
• Unique protein chains: 1

1EL0

SOLUTION STRUCTURE OF THE HUMAN CC CHEMOKINE, I-309

• DOI: 10.2210/pdb1EL0/pdb
• BMRB: 4686

• Classification: IMMUNE SYSTEM
• Mutation(s): No 


• Deposited: 2000-03-11 Released: 2000-09-01 
• Deposition Author(s): Keizer, D.W., Crump, M.P., Lee, T.W., Slupsky, C.M., Clark-Lewis, I., Sykes, B.D.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 30 
• Selection Criteria: structures with favorable non-bond energy 

Literature

Human CC chemokine I-309, structural consequences of the additional disulfide bond.

Keizer, D.W., Crump, M.P., Lee, T.W., Slupsky, C.M., Clark-Lewis, I., Sykes, B.D.

(2000) Biochemistry 39: 6053-6059

• PubMed: 10821677 
• DOI: 10.1021/bi000089l
• Primary Citation of Related Structures:  
  1EL0


• PubMed Abstract: 
  

I-309 is a member of the CC subclass of chemokines and is one of only three human chemokines known to contain an additional, third disulfide bond. The three-dimensional solution structure of I-309 was determined by (1)H nuclear magnetic resonance spectroscopy and dynamic simulated annealing. The structure of I-309, which remains monomeric at high concentrations, was determined on the basis of 978 experimental restraints. The N-terminal region of I-309 was disordered, as has been previously observed for the CC chemokine eotaxin but not others such as MCP-1 and RANTES. This was followed in I-309 by a well-ordered region between residues 13 and 69 that consisted of a 3(10)-helix, a triple-stranded antiparallel beta-sheet, and finally a C-terminal alpha-helix. Root-mean-square deviations of 0.61 and 1.16 were observed for the backbone and heavy atoms, respectively. A comparison of I-309 to eotaxin and HCC-2 revealed a significant structural change in the C-terminal region of the protein. The alpha-helix normally present in chemokines was terminated early and was followed by a short section of extended strand. These changes were a direct result of the additional disulfide bond present in this protein. An examination of the I-309 structure will aid in an understanding of the specificity of this protein with its receptor, CCR8.

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Organizational Affiliation: 

Protein Engineering Network Centres of Excellence (PENCE) and Department of Biochemistry, 713 Heritage Medical Research Centre, University of Alberta, Edmonton, Alberta, Canada T6G 2S2.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
I-309	A	74	N/A	Mutation(s): 0
Find proteins for P22362 (Homo sapiens) Explore P22362  Go to UniProtKB:  P22362
NIH Common Fund Data Resources
PHAROS  P22362 GTEx  ENSG00000108702

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 30 
• Selection Criteria: structures with favorable non-bond energy 
• OLDERADO: 1EL0 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-03-11 
• Released Date: 2000-09-01 
Deposition Author(s): Keizer, D.W., Crump, M.P., Lee, T.W., Slupsky, C.M., Clark-Lewis, I., Sykes, B.D.

Revision History 

• Version 1.0: 2000-09-01
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance