3K82
Crystal Structure of the third PDZ domain of PSD-95
Summary for 3K82
| Entry DOI | 10.2210/pdb3k82/pdb |
| Related | 3I4W |
| Descriptor | Disks large homolog 4, PHOSPHATE ION, GLYCEROL, ... (5 entities in total) |
| Functional Keywords | alpha and beta protein, cell junction, cell membrane, lipoprotein, membrane, palmitate, phosphoprotein, postsynaptic cell membrane, sh3 domain, synapse, cell adhesion |
| Biological source | Homo sapiens (human) |
| Cellular location | Cell membrane ; Peripheral membrane protein : P78352 |
| Total number of polymer chains | 1 |
| Total formula weight | 10938.11 |
| Authors | Camara-Artigas, A.,Gavira, J.A. (deposition date: 2009-10-13, release date: 2010-04-07, Last modification date: 2024-10-30) |
| Primary citation | Camara-Artigas, A.,Murciano-Calles, J.,Gavira, J.A.,Cobos, E.S.,Martinez, J.C. Novel conformational aspects of the third PDZ domain of the neuronal post-synaptic density-95 protein revealed from two 1.4A X-ray structures J.Struct.Biol., 170:565-569, 2010 Cited by PubMed Abstract: The crystal structure of the third PDZ domain of the neuronal post-synaptic density-95 protein (PSD95-PDZ3, residues 302-402) has been solved at 1.4 and 1.35A from two different crystal forms. These structures lack the cloning artefact present in the carboxyl terminal sequence of the former crystallographic structures and they belong to the space groups P4(3) and P1. The new PDZ structures are identical between the two crystal forms and among the four chains of the P1 crystal form. When we compare the new structures with the previous ones, some important conformational differences in the C-terminal alpha-helix and in the loop connecting beta2 and beta3 strands have been found. Additionally, the high resolution of the new structures has allowed us to indentify a succinimide residue at the position corresponding to Asp332 in the beta2-beta3 loop, which may contribute to the alternate conformation of this loop, and at the same time, to the interaction between residues from this loop and the C-terminal alpha-helix. Thus, these features would have implications in the recently proposed allosteric role of this third alpha-helix in the binding of the carboxyl terminal fragments to the PSD95-PDZ3. PubMed: 20227506DOI: 10.1016/j.jsb.2010.03.005 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.4 Å) |
Structure validation
Download full validation report
