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Crystal structure of a PDZ domain

PDZ domains (also known as DHR domains or GLGF repeats) are ~90-residue repeats found in a number of proteins implicated in ion-channel and receptor clustering, and the linking of receptors to effector enzymes1. PDZ domains are protein-recognition modules; some recognize proteins containing the cons...

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Published in:Nature (London) 1996-08, Vol.382 (6592), p.649-652
Main Authors: Cabral, João H. Morais, Petosa, Carlo, Sutcliffe, Michael J, Raza, Sami, Byron, Olwyn, Poy, Florence, Marfatia, Shirin M, Chishti, Athar H, Liddington, Robert C
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description PDZ domains (also known as DHR domains or GLGF repeats) are ~90-residue repeats found in a number of proteins implicated in ion-channel and receptor clustering, and the linking of receptors to effector enzymes1. PDZ domains are protein-recognition modules; some recognize proteins containing the consensus carboxy-terminal tripeptide motif S/TXV with high specificity 2–4 . Other PDZ domains form homotypic dimers: the PDZ domain of the neuronal enzyme nitric oxide synthase binds to the PDZ domain of PSD-95, an interaction that has been implicated in its synaptic association 5 . Here we report the crystal structure of the third PDZ domain of the human homologue of the Drosophila discs-large tumour-suppressor gene product, DlgA. It consists of a five-stranded antiparallel β-barrel flanked by three α-helices. A groove runs over the surface of the domain, ending in a conserved hydrophobic pocket and a buried arginine; we suggest that this is the binding site for the C-terminal peptide.
doi_str_mv 10.1038/382649a0
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subjects Adaptor Proteins, Signal Transducing
Amino Acid Sequence
Analytical, structural and metabolic biochemistry
Animals
Binding and carrier proteins
Binding Sites
Biochemistry
Biological and medical sciences
Crystallography, X-Ray
Crystals
Drosophila
Fundamental and applied biological sciences. Psychology
Genes
Genes, Tumor Suppressor
Humanities and Social Sciences
Humans
Ions
letter
Membrane Proteins
Models, Molecular
Molecular Sequence Data
multidisciplinary
Nitric oxide
Proteins
Proteins - chemistry
Proteins - genetics
Recombinant Proteins - chemistry
Science
Science (multidisciplinary)
Sequence Homology, Amino Acid
title Crystal structure of a PDZ domain
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