ISDA: 2XKX

Deposition Date 2010-07-15

Release Date 2011-07-20

Last Version Date 2024-05-08

Entry Detail

PDB ID:

2XKX

Keywords:

STRUCTURAL PROTEIN

Title:

Single particle analysis of PSD-95 in negative stain

Biological Source:

Source Organism(s):

RATTUS NORVEGICUS (Taxon ID: 10116)

Expression System(s):

Escherichia coli

Method Details:

Experimental Method:

ELECTRON MICROSCOPY, SOLUTION SCATTERING

Resolution:

22.90 Å

Aggregation State:

PARTICLE

Reconstruction Method:

SINGLE PARTICLE

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:DISKS LARGE HOMOLOG 4
Gene (Uniprot):Dlg4
Mutagens:YES
Chain IDs:A, B
Chain Length:721
Number of Molecules:2
Biological Source:RATTUS NORVEGICUS

UniProt ID:P31016 Pfam ID:PF10608, PF00595, PF10600, PF00018, PF00625

Ligand Molecules

Primary Citation

Self-Directed Assembly and Clustering of the Cytoplasmic Domains of Inwardly Rectifying Kir2.1 Potassium Channels on Association with Psd-95

Fomina, S, Howard, T.D, Sleator, O.K, Golovanova, M, O'Ryan, L, Leyland, M.L, Grossmann, J.G, Collins, R.F, Prince, S.M, Long, J, Tochio, H, Wang, P, Fan, J, Sala, C, Niethammer, M, Sheng, M, Zhang, M, Tochio, H, Hung, F, Li, M, Bredt, D.S, Zhang, M, Saro, D, Wawrzak, Z, Martin, P, Vickrey, J, Paredes, A, Kovari, L, Spaller, M, Mcgee, A.W, Dakoji, S.R, Olsen, O, Bredt, D.S, Lim, W.A, Prehoda, K.E.Show

Biochim.Biophys.Acta 1808 2374 ? (2011)

PMID: 21756874 DOI: 10.1016/J.BBAMEM.2011.06.021

Abstact

The interaction of the extra-membranous domain of tetrameric inwardly rectifying Kir2.1 ion channels (Kir2.1NC(4)) with the membrane associated guanylate kinase protein PSD-95 has been studied using Transmission Electron Microscopy in negative stain. Three types of complexes were observed in electron micrographs corresponding to a 1:1 complex, a large self-enclosed tetrad complex and extended chains of linked channel domains. Using models derived from small angle X-ray scattering experiments in which high resolution structures from X-ray crystallographic and Nuclear Magnetic Resonance studies are positioned, the envelopes from single particle analysis can be resolved as a Kir2.1NC(4):PSD-95 complex and a tetrad of this unit (Kir2.1NC(4):PSD-95)(4). The tetrad complex shows the close association of the Kir2.1 cytoplasmic domains and the influence of PSD-95 mediated self-assembly on the clustering of these channels.

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Primary Citation of related structures

Abstact

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