1HRP

CRYSTAL STRUCTURE OF HUMAN CHORIONIC GONADOTROPIN

• PDB DOI: https://doi.org/10.2210/pdb1HRP/pdb

• Classification: HORMONE
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 1994-08-15 Released: 1994-11-01 
• Deposition Author(s): Lapthorn, A.J., Harris, D.C., Isaacs, N.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.314 
• R-Value Work: 0.218 
• R-Value Observed: 0.218 

Literature

Crystal structure of human chorionic gonadotropin.

Lapthorn, A.J., Harris, D.C., Littlejohn, A., Lustbader, J.W., Canfield, R.E., Machin, K.J., Morgan, F.J., Isaacs, N.W.

(1994) Nature 369: 455-461

• PubMed: 8202136 
• DOI: https://doi.org/10.1038/369455a0
• Primary Citation of Related Structures:  
  1HRP


• PubMed Abstract: 
  

  The three-dimensional structure of human chorionic gonadotropin shows that each of its two different subunits has a similar topology, with three disulphide bonds forming a cystine knot. This same folding motif is found in some protein growth factors. The heterodimer is stabilized by a segment of the beta-subunit which wraps around the alpha-subunit and is covalently linked like a seat belt by the disulphide Cys 26-Cys 110. This extraordinary feature appears to be essential not only for the association of these heterodimers but also for receptor binding by the glycoprotein hormones.

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Organizational Affiliation: 

Department of Chemistry, University of Glasgow, UK.

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: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 27.06 kDa 
• Atom Count: 1,550 
• Modelled Residue Count: 196 
• Deposited Residue Count: 237 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HUMAN CHORIONIC GONADOTROPIN	A	92	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P01215 (Homo sapiens) Explore P01215  Go to UniProtKB:  P01215
PHAROS:  P01215 GTEx:  ENSG00000135346
Glycosylation
Glycosylation Sites: 2		Go to GlyGen: P01215-1

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
HUMAN CHORIONIC GONADOTROPIN	B	145	Homo sapiens	Mutation(s): 0  Gene Names: CGB3, CGB5, CGB8
UniProt & NIH Common Fund Data Resources
Find proteins for P0DN86 (Homo sapiens) Explore P0DN86  Go to UniProtKB:  P0DN86
PHAROS:  P0DN86 GTEx:  ENSG00000189052 ENSG00000104827 ENSG00000213030
Glycosylation
Glycosylation Sites: 2		Go to GlyGen: P0DN86-1

Oligosaccharides

Help

Entity ID: 3
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	C, D	2		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT GlyCosmos:  G42666HT GlyGen:  G42666HT

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	E [auth B], F [auth B]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.314 
• R-Value Work: 0.218 
• R-Value Observed: 0.218 
• Space Group: P 6₅ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 88.68	α = 90
b = 88.68	β = 90
c = 177.24	γ = 120

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-11-01 
Deposition Author(s): Lapthorn, A.J., Harris, D.C., Isaacs, N.W.

Revision History  

• Version 1.0: 1994-11-01
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Atomic model, Data collection, Database references, Derived calculations, Other, Structure summary
• Version 2.1: 2024-10-30
  Changes: Data collection, Database references, Structure summary