1AYO

RECEPTOR BINDING DOMAIN OF BOVINE ALPHA-2-MACROGLOBULIN

• PDB DOI: https://doi.org/10.2210/pdb1AYO/pdb

• Classification: MACROGLOBULIN
• Organism(s): Bos taurus
• Mutation(s): No 


• Deposited: 1997-11-07 Released: 1998-11-25 
• Deposition Author(s): Jenner, L.B., Husted, L., Thirup, S., Sottrup-Jensen, L., Nyborg, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.239 
• R-Value Observed: 0.195 

Literature

Crystal structure of the receptor-binding domain of alpha 2-macroglobulin.

Jenner, L., Husted, L., Thirup, S., Sottrup-Jensen, L., Nyborg, J.

(1998) Structure 6: 595-604

• PubMed: 9634697 
• DOI: https://doi.org/10.1016/s0969-2126(98)00061-6
• Primary Citation of Related Structures:  
  1AYO


• PubMed Abstract: 
  

  The large plasma proteinase inhibitors of the alpha 2-macroglobulin superfamily inhibit proteinases by capturing them within a central cavity of the inhibitor molecule. After reaction with the proteinase, the alpha-macroglobulin-proteinase complex binds to the alpha-macroglobulin receptor, present in the liver and other tissues, and becomes endocytosed and rapidly removed from the circulation. The complex binds to the receptor via recognition sites located on a separate domain of approximately 138 residues positioned at the C terminus of the alpha-macroglobulin subunit.

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Organizational Affiliation: 

Department of Molecular and Structural Biology, University of Aarhus, Denmark.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 29.48 kDa 
• Atom Count: 2,370 
• Modelled Residue Count: 260 
• Deposited Residue Count: 260 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ALPHA-2-MACROGLOBULIN	A, B	130	Bos taurus	Mutation(s): 0
UniProt
Find proteins for Q7SIH1 (Bos taurus) Explore Q7SIH1  Go to UniProtKB:  Q7SIH1

Oligosaccharides

Help

Entity ID: 2
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	2		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT GlyCosmos:  G42666HT GlyGen:  G42666HT

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA	D [auth B]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.239 
• R-Value Observed: 0.195 
• Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 107.57	α = 90
b = 107.57	β = 90
c = 72.229	γ = 120

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
SHELXL-97	model building
SHELXL-97	refinement
SHELXL-97	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-11-25 
Deposition Author(s): Jenner, L.B., Husted, L., Thirup, S., Sottrup-Jensen, L., Nyborg, J.

Revision History  

• Version 1.0: 1998-11-25
  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, Structure summary