4X0L

Human haptoglobin-haemoglobin complex

• PDB DOI: https://doi.org/10.2210/pdb4X0L/pdb

• Classification: OXYGEN TRANSPORT
• Organism(s): Homo sapiens
• Expression System: Homo sapiens, Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2014-11-21 Released: 2014-12-24 
• Deposition Author(s): Lane-Serff, H., MacGregor, P., Lowe, E.D., Carrington, M., Higgins, M.K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.05 Å
• R-Value Free: 0.224 
• R-Value Work: 0.180 
• R-Value Observed: 0.182 

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 61.91 kDa 
• Atom Count: 4,551 
• Modelled Residue Count: 544 
• Deposited Residue Count: 546 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Hemoglobin subunit alpha	A	141	Homo sapiens	Mutation(s): 0  Gene Names: HBA1, HBA2
UniProt & NIH Common Fund Data Resources
Find proteins for P69905 (Homo sapiens) Explore P69905  Go to UniProtKB:  P69905
PHAROS:  P69905 GTEx:  ENSG00000188536 ENSG00000206172

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Hemoglobin subunit beta	B	146	Homo sapiens	Mutation(s): 0  Gene Names: HBB
UniProt & NIH Common Fund Data Resources
Find proteins for P68871 (Homo sapiens) Explore P68871  Go to UniProtKB:  P68871
PHAROS:  P68871 GTEx:  ENSG00000244734

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Haptoglobin	C	259	Homo sapiens	Mutation(s): 0  Gene Names: HP
UniProt & NIH Common Fund Data Resources
Find proteins for P00738 (Homo sapiens) Explore P00738  Go to UniProtKB:  P00738
PHAROS:  P00738 GTEx:  ENSG00000257017

Oligosaccharides

Help

Entity ID: 4
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose	D	2		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G86851RC GlyCosmos:  G86851RC GlyGen:  G86851RC

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	E [auth A], G [auth B]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
CAC	L [auth C]	CACODYLATE ION C2 H6 As O2 OGGXGZAMXPVRFZ-UHFFFAOYSA-M
SO4	J [auth C]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
GOL	I [auth B], K [auth C]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
OXY	F [auth A], H [auth B]	OXYGEN MOLECULE O2 MYMOFIZGZYHOMD-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.05 Å
• R-Value Free: 0.224 
• R-Value Work: 0.180 
• R-Value Observed: 0.182 
• Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 96.599	α = 90
b = 96.599	β = 90
c = 132.771	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-12-24 
Deposition Author(s): Lane-Serff, H., MacGregor, P., Lowe, E.D., Carrington, M., Higgins, M.K.

Revision History  

• Version 1.0: 2014-12-24
  Type: Initial release
  
• Version 1.1: 2015-01-21
  Changes: Database references
• Version 1.2: 2015-03-04
  Changes: Database references
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Atomic model, Data collection, Derived calculations, Source and taxonomy, Structure summary
• Version 2.1: 2024-01-10
  Changes: Data collection, Database references, Derived calculations, Refinement description, Structure summary