6FPY

Inter-alpha-inhibitor heavy chain 1, wild type

• PDB DOI: https://doi.org/10.2210/pdb6FPY/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli K-12
• Mutation(s): No 


• Deposited: 2018-02-12 Released: 2019-02-27 
• Deposition Author(s): Briggs, D.C., Day, A.J.
• Funding Organization(s): Arthritis Research UK

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.34 Å
• R-Value Free: 0.261 
• R-Value Work: 0.231 
• R-Value Observed: 0.233 

Literature

Inter-alpha-inhibitor heavy chain-1 has an integrin-like 3D structure mediating immune regulatory activities and matrix stabilization during ovulation

Briggs, D.C., Langford-Smith, A.W.W., Birchenough, H.L., Jowitt, T.A., Kielty, C.M., Enghild, J.J., Baldock, C., Milner, C.M., Day, A.J.

(2020) J Biol Chem 

• DOI: https://doi.org/10.1074/jbc.RA119.011916

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 148.48 kDa 
• Atom Count: 9,702 
• Modelled Residue Count: 1,199 
• Deposited Residue Count: 1,320 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Inter-alpha-trypsin inhibitor heavy chain H1	A, B	660	Homo sapiens	Mutation(s): 0  Gene Names: ITIH1, IGHEP1
UniProt & NIH Common Fund Data Resources
Find proteins for P19827 (Homo sapiens) Explore P19827  Go to UniProtKB:  P19827
PHAROS:  P19827 GTEx:  ENSG00000055957

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GOL	D [auth A], E [auth A], F [auth A], H [auth B], I [auth B], J [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
MG	C [auth A], G [auth B]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.34 Å
• R-Value Free: 0.261 
• R-Value Work: 0.231 
• R-Value Observed: 0.233 
• Space Group: P 4₂

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 158.767	α = 90
b = 158.767	β = 90
c = 65.371	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
Aimless	data scaling
SOLVE	phasing
PDB_EXTRACT	data extraction

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2019-02-27 
Deposition Author(s): Briggs, D.C., Day, A.J.

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Funding Organization	Location	Grant Number
Arthritis Research UK	United Kingdom	19489

Revision History  

• Version 1.0: 2019-02-27
  Type: Initial release
  
• Version 1.1: 2019-07-17
  Changes: Data collection, Database references
• Version 1.2: 2020-03-18
  Changes: Database references
• Version 1.3: 2024-11-06
  Changes: Data collection, Database references, Derived calculations, Structure summary