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.
(1996) Cell 85: 1067-1076
- PubMed: 8674113
- Primary Citation of Related Structures:  1BFE
- PubMed Abstract:
- Crystal Structure of a Pdz Domain
Cabral, M.,Petosa, C.,Sutcliffe, M.J.,Raza, S.,Byron, O.,Poy, F.,Marfatia, S.M.,Chishti, A.H.,Liddington, R.C.
(1996) Nature 382: 649
- Crystal Structure of the Hcask Pdz Domain Reveals the Structural Basis of Class II Pdz Domain Target Recognition
Daniels, D.L.,Cohen, A.R.,Anderson, J.M.,Brunger, A.T.
(1998) Nat.Struct.Mol.Biol. 5: 317
- Cript, a Novel Postsynaptic Protein that Binds to the Third Pdz Domain of Psd-95/Sap90
Niethammer, M.,Valtschanoff, J.G.,Kapoor, T.M.,Allison, D.W.,Weinberg, T.M.,Craig, A.M.,Sheng, M.
(1998) Neuron 20: 693
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 co ...
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.
Laboratory of Molecular Neurobiology and Biophysics, The Rockefeller University, New York, NY 10021, USA.