ISDA

Deposition Date 2001-06-28

Release Date 2001-10-10

Last Version Date 2024-11-13

Entry Detail

PDB ID:

1JHN

Keywords:

CHAPERONE

Title:

Crystal Structure of the Lumenal Domain of Calnexin

Biological Source:

Source Organism:

Canis lupus familiaris (Taxon ID: 9615)

Host Organism:

Spodoptera frugiperda

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.90 Å

R-Value Free:

0.37

R-Value Work:

0.32

Space Group:

P 43 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:calnexin
Gene (Uniprot):CANX
Chain IDs:A
Chain Length:424
Number of Molecules:1
Biological Source:Canis lupus familiaris

UniProt ID:P24643 Pfam ID:PF00262

Ligand Molecules

Primary Citation

The Structure of calnexin, an ER chaperone involved in quality control of protein folding.

Schrag, J.D, Bergeron, J.J, Li, Y, Borisova, S, Hahn, M, Thomas, D.Y, Cygler, M, Hahn, M, Borisova, S, Schrag, J.D, Tessier, D.C, Zapun, A, Tom, R, Kamen, A.A, Bergeron, J.J, Thomas, D.Y, Cygler, M.Show

Mol.Cell 8 633 644 (2001)

PMID: 11583625 DOI: 10.1016/S1097-2765(01)00318-5

Abstact

The three-dimensional structure of the lumenal domain of the lectin-like chaperone calnexin determined to 2.9 A resolution reveals an extended 140 A arm inserted into a beta sandwich structure characteristic of legume lectins. The arm is composed of tandem repeats of two proline-rich sequence motifs which interact with one another in a head-to-tail fashion. Identification of the ligand binding site establishes calnexin as a monovalent lectin, providing insight into the mechanism by which the calnexin family of chaperones interacts with monoglucosylated glycoproteins.

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Protein

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Disease

Primary Citation of related structures