8XWY | pdb_00008xwy

Structure of Interleukin-27

• PDB DOI: https://doi.org/10.2210/pdb8XWY/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2024-01-17 Released: 2025-01-22 
• Deposition Author(s): Feng, Y., Dong, X.C.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.40 Å
• R-Value Free: 
  0.297 (Depositor), 0.292 (DCC) 
• R-Value Work: 
  0.254 (Depositor), 0.252 (DCC) 
• R-Value Observed: 
  0.258 (Depositor) 

Starting Models: in silico

Literature

Structure of IL-27 indicates a much broader promiscuous pairing of the IL-6/IL-12 family

Feng, Y., Dong, X.C.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Macromolecule Content 

• Total Structure Weight: 96.34 kDa 
• Atom Count: 5,528 
• Modeled Residue Count: 678 
• Deposited Residue Count: 848 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Interleukin-27 subunit alpha	A, D	215	Homo sapiens	Mutation(s): 0  Gene Names: IL27, IL27A, IL30
UniProt & NIH Common Fund Data Resources
Find proteins for Q8NEV9 (Homo sapiens) Explore Q8NEV9  Go to UniProtKB:  Q8NEV9
PHAROS:  Q8NEV9 GTEx:  ENSG00000197272

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Interleukin-27 subunit beta	B, C	209	Homo sapiens	Mutation(s): 0  Gene Names: EBI3, IL27B
UniProt & NIH Common Fund Data Resources
Find proteins for Q14213 (Homo sapiens) Explore Q14213  Go to UniProtKB:  Q14213
PHAROS:  Q14213 GTEx:  ENSG00000105246
Glycosylation
Glycosylation Sites: 1		Go to GlyGen: Q14213-1

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	E [auth B], F [auth C]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
SO4	G [auth C]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.40 Å
• R-Value Free:  0.297 (Depositor), 0.292 (DCC) 
• R-Value Work:  0.254 (Depositor), 0.252 (DCC) 
• R-Value Observed: 0.258 (Depositor) 

Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 130.45	α = 90
b = 130.45	β = 90
c = 260.59	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data scaling
PHENIX	phasing
Coot	model building
XDS	data reduction

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-01-22 
Deposition Author(s): Feng, Y., Dong, X.C.

---

Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32171254

Revision History  

• Version 1.0: 2025-01-22
  Type: Initial release