ISDA

Deposition Date 1998-05-20

Release Date 1998-10-21

Last Version Date 2024-02-07

Entry Detail

PDB ID:

1BE9

Keywords:

PEPTIDE RECOGNITION

Title:

THE THIRD PDZ DOMAIN FROM THE SYNAPTIC PROTEIN PSD-95 IN COMPLEX WITH A C-TERMINAL PEPTIDE DERIVED FROM CRIPT.

Biological Source:

Source Organism:

Rattus norvegicus (Taxon ID: 10116)

Host Organism:

Escherichia coli BL21

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.82 Å

R-Value Free:

0.27

R-Value Work:

0.20

Space Group:

P 41 3 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:PSD-95
Gene (Uniprot):Dlg4
Chain IDs:A
Chain Length:119
Number of Molecules:1
Biological Source:Rattus norvegicus

UniProt ID:P31016 Pfam ID:PF00595

Primary Citation

Crystal structures of a complexed and peptide-free membrane protein-binding domain: molecular basis of peptide recognition by PDZ.

Doyle, D.A, Lee, A, Lewis, J, Kim, E, Sheng, M, MacKinnon, R, Daniels, D.L, Cohen, A.R, Anderson, J.M, Brunger, A.T, Niethammer, M, Valtschanoff, J.G, Kapoor, T.M, Allison, D.W, Weinberg, T.M, Craig, A.M, Sheng, M, Cabral, M, Petosa, C, Sutcliffe, M.J, Raza, S, Byron, O, Poy, F, Marfatia, S.M, Chishti, A.H, Liddington, R.C.Show

Cell(Cambridge,Mass.) 85 1067 1076 (1996)

PMID: 8674113 DOI: 10.1016/S0092-8674(00)81307-0

Abstact

Modular PDZ domains, found in many cell junction-associated proteins, mediate the clustering of membrane ion channels by binding to their C-terminus. The X-ray crystallographic structures of the third PDZ domain from the synaptic protein PSD-95 in complex with and in the absence of its peptide ligand have been determined at 1.8 angstroms and 2.3 angstroms resolution, respectively. The structures reveal that a four-residue C-terminal stretch (X-Thr/Ser-X-Val-COO(-)) engages the PDZ domain through antiparallel main chain interactions with a beta sheet of the domain. Recognition of the terminal carboxylate group of the peptide is conferred by a cradle of main chain amides provided by a Gly-Leu-Gly-Phe loop as well as by an arginine side chain. Specific side chain interactions and a prominent hydrophobic pocket explain the selective recognition of the C-terminal consensus sequence.

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Primary Citation of related structures