ISDA

Entry Detail

PDB ID:

1IDO

Keywords:

CELL ADHESION PROTEIN

Title:

I-DOMAIN FROM INTEGRIN CR3, MG2+ BOUND

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

1996-03-12

Release Date:

1996-08-01

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.70 Å

R-Value Work:

0.20

R-Value Observed:

0.20

Space Group:

P 43

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:INTEGRIN
Chain IDs:A
Chain Length:189
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P11215 Pfam ID:PF00092

Ligand Molecules

Primary Citation

Crystal structure of the A domain from the alpha subunit of integrin CR3 (CD11b/CD18).

Lee, J.O, Rieu, P, Arnaout, M.A, Liddington, R, Lee, J.-O, Bankston, L.A, Arnaout, M.A, Liddington, R.C, Michishita, M, Videm, V, Arnaout, M.A.Show

Cell(Cambridge,Mass.) 80 631 638 (1995)

PMID: 7867070 DOI: 10.1016/0092-8674(95)90517-0

Abstact

We have determined the high resolution crystal structure of the A domain from the alpha chain of integrin CR3. The domain adopts a classic alpha/beta "Rossmann" fold and contains an unusual Mg2+ coordination site at its surface. One of the coordinating ligands is the glutamate side chain from another A domain molecule. We suggest that this site represents a general metal ion-dependent adhesion site (MIDAS) for binding protein ligands. We further propose that the beta subunits of integrins contain a MIDAS motif within a modified A domain. Our crystal structure will allow reliable models to be built for other members of the A domain superfamily and should facilitate development of novel adhesion modulatory drugs.

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Primary Citation of related structures