Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 12.93 kDa 
• Atom Count: 903 
• Modelled Residue Count: 112 
• Deposited Residue Count: 119 
• Unique protein chains: 1

1BY2

STRUCTURE OF M2BP SCAVENGER RECEPTOR CYSTEINE-RICH DOMAIN

• DOI: 10.2210/pdb1BY2/pdb

• Classification: EXTRACELLULAR MODULE
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 1998-10-23 Released: 1999-05-18 
• Deposition Author(s): Hohenester, E., Sasaki, T., Timpl, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.218 
• R-Value Work: 0.186 
• R-Value Observed: 0.186 

Literature

Crystal structure of a scavenger receptor cysteine-rich domain sheds light on an ancient superfamily.

Hohenester, E., Sasaki, T., Timpl, R.

(1999) Nat Struct Biol 6: 228-232

• PubMed: 10074941 
• DOI: 10.1038/6669
• Primary Citation of Related Structures:  
  1BY2


• PubMed Abstract: 
  

Scavenger receptor cysteine-rich (SRCR) domains are found widely in cell surface molecules and in some secreted proteins, where they are thought to mediate ligand binding. We have determined the crystal structure at 2.0 A resolution of the SRCR domain of Mac-2 binding protein (M2BP), a tumor-associated antigen and matrix protein. The structure reveals a curved six-stranded beta-sheet cradling an alpha-helix. Structure-based sequence alignment demonstrates that the M2BP SRCR domain is a valid template for the entire SRCR protein superfamily. This allows an interpretation of previous mutagenesis data on ligand binding to the lymphocyte receptor CD6.

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Related Citations: 

• Mac-2 Binding Protein is a Cell-Adhesive Protein of the Extracellular Matrix which Self-Assembles Into Ring-Like Structures and Binds Beta1 Integrins, Collagens and Fibronectin
  Sasaki, T., Brakebusch, C., Engel, J., Timpl, R.
  (1998) EMBO J 17: 1606

• The Srcr Superfamily: A Family Reminiscent of the Ig Superfamily
  Resnick, D., Pearson, A., Krieger, M.
  (1994) Trends Biochem Sci 19: 5

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Organizational Affiliation: 

Department of Crystallography, Birkbeck College, University of London, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MAC-2 BINDING PROTEIN	A	119	Homo sapiens	Mutation(s): 0  Gene Names: LGALS3BP, M2BP
UniProt & NIH Common Fund Data Resources
Find proteins for Q08380 (Homo sapiens) Explore Q08380  Go to UniProtKB:  Q08380
PHAROS:  Q08380 GTEx:  ENSG00000108679

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.218 
• R-Value Work: 0.186 
• R-Value Observed: 0.186 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 44.63	α = 90
b = 44.63	β = 90
c = 134.54	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
CCP4	model building
X-PLOR	refinement
CCP4	data scaling
CCP4	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-10-23 
• Released Date: 1999-05-18 
Deposition Author(s): Hohenester, E., Sasaki, T., Timpl, R.

Revision History  

• Version 1.0: 1999-05-18
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.3: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Data collection, Derived calculations, Structure summary