Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 43428.28 
• Atom Count: 3062 
• Residue Count: 380 
• Unique protein chains: 1

1BHO

MAC-1 I DOMAIN MAGNESIUM COMPLEX

• DOI: 10.2210/pdb1BHO/pdb

• Classification: CELL ADHESION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 1998-06-10 Released: 1998-11-04 
• Deposition Author(s): Baldwin, E.T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.7 Å
• R-Value Work: 0.181 

Literature

Cation binding to the integrin CD11b I domain and activation model assessment

Baldwin, E.T., Sarver, R.W., Bryant Jr., G.L., Curry, K.A., Fairbanks, M.B., Finzel, B.C., Garlick, R.L., Heinrikson, R.L., Horton, N.C., Kelley, L.L., Mildner, A.M., Moon, J.B., Mott, J.E., Mutchler, V.T., Tomich, C.S., Watenpaugh, K.D., Wiley, V.H.

(1998) Structure 6: 923-935

• PubMed: 9687375 
• Primary Citation of Related Structures:  
  1IDN, 1BHQ


• PubMed Abstract: 
  

The integrin family of cell-surface receptors mediate cell adhesion through interactions with the extracellular matrix or other cell-surface receptors. The alpha chain of some integrin heterodimers includes an inserted 'I domain' of about 200 amino acids which binds divalent metal ions and is essential for integrin function. Lee et al. proposed that the I domain of the integrin CD11b adopts a unique 'active' conformation when bound to its counter receptor. In addition, they proposed that the lack of adhesion in the presence of Ca2+ ion reflected the stabilization of an 'inactive' I-domain conformation. We set out to independently determine the structure of the CD11 b I domain and to evaluate the structural effects of divalent ion binding to this protein.

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Organizational Affiliation: 

Structural, Analytical & Medicinal Chemistry, Pharmacia & Upjohn, Inc., Kalamazoo, MI 49001, USA. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CD11B	1, 2	190	Homo sapiens	Mutation(s): 0  Gene Names: ITGAM (CD11B, CR3A)
Find proteins for P11215 (Homo sapiens) Go to Gene View: ITGAM Go to UniProtKB:  P11215

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
MG	1, 2	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
ACE	1, 2	NON-POLYMER	C2 H4 O		--

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.7 Å
• R-Value Work: 0.181 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 48.590	α = 90.00
b = 123.270	β = 90.00
c = 75.650	γ = 90.00

Software Package:

Software Name	Purpose
XENGEN	data scaling
PROLSQ	refinement
XENGEN	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-06-10 
• Released Date: 1998-11-04 
• Deposition Author(s): Baldwin, E.T.

Revision History 

• Version 1.0: 1998-11-04
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2018-03-07
  Type: Data collection, Other