2n2c
From Proteopedia
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==NMR Structure of TDP-43 prion-like hydrophobic helix in DPC== | ==NMR Structure of TDP-43 prion-like hydrophobic helix in DPC== | ||
| - | <StructureSection load='2n2c' size='340' side='right'caption='[[2n2c | + | <StructureSection load='2n2c' size='340' side='right'caption='[[2n2c]]' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[2n2c]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/ | + | <table><tr><td colspan='2'>[[2n2c]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2N2C OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2N2C FirstGlance]. <br> |
| - | </td></tr> | + | </td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2n2c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2n2c OCA], [https://pdbe.org/2n2c PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2n2c RCSB], [https://www.ebi.ac.uk/pdbsum/2n2c PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2n2c ProSAT]</span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2n2c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2n2c OCA], [https://pdbe.org/2n2c PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2n2c RCSB], [https://www.ebi.ac.uk/pdbsum/2n2c PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2n2c ProSAT]</span></td></tr> | + | |
</table> | </table> | ||
== Disease == | == Disease == | ||
| - | + | [https://www.uniprot.org/uniprot/TADBP_HUMAN TADBP_HUMAN] Defects in TARDBP are the cause of amyotrophic lateral sclerosis type 10 (ALS10) [MIM:[https://omim.org/entry/612069 612069]. ALS is a neurodegenerative disorder affecting upper and lower motor neurons and resulting in fatal paralysis. Sensory abnormalities are absent. Death usually occurs within 2 to 5 years. The etiology of ALS is likely to be multifactorial, involving both genetic and environmental factors. The disease is inherited in 5-10% of the cases.<ref>PMID:20740007</ref> <ref>PMID:18288693</ref> <ref>PMID:18438952</ref> <ref>PMID:18396105</ref> <ref>PMID:18372902</ref> <ref>PMID:18309045</ref> <ref>PMID:19350673</ref> <ref>PMID:19224587</ref> <ref>PMID:19655382</ref> <ref>PMID:19695877</ref> <ref>PMID:21220647</ref> <ref>PMID:21418058</ref> <ref>PMID:22456481</ref> | |
== Function == | == Function == | ||
| - | + | [https://www.uniprot.org/uniprot/TADBP_HUMAN TADBP_HUMAN] DNA and RNA-binding protein which regulates transcription and splicing. Involved in the regulation of CFTR splicing. It promotes CFTR exon 9 skipping by binding to the UG repeated motifs in the polymorphic region near the 3'-splice site of this exon. The resulting aberrant splicing is associated with pathological features typical of cystic fibrosis. May also be involved in microRNA biogenesis, apoptosis and cell division. Can repress HIV-1 transcription by binding to the HIV-1 long terminal repeat. Stabilizes the low molecular weight neurofilament (NFL) mRNA through a direct interaction with the 3' UTR.<ref>PMID:17481916</ref> <ref>PMID:11285240</ref> | |
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | TAR-DNA-binding protein-43 (TDP-43) C-terminus encodes a prion-like domain widely presented in RNA-binding proteins, which functions to form dynamic oligomers and also, amazingly, hosts most amyotrophic lateral sclerosis (ALS)-causing mutations. Here, as facilitated by our previous discovery, by circular dichroism (CD), fluorescence and nuclear magnetic resonance (NMR) spectroscopy, we have successfully determined conformations, dynamics, and self-associations of the full-length prion-like domains of the wild type and three ALS-causing mutants (A315E, Q331K, and M337V) in both aqueous solutions and membrane environments. The study decodes the following: (1) The TDP-43 prion-like domain is intrinsically disordered only with some nascent secondary structures in aqueous solutions, but owns the capacity to assemble into dynamic oligomers rich in beta-sheet structures. By contrast, despite having highly similar conformations, three mutants gained the ability to form amyloid oligomers. The wild type and three mutants all formed amyloid fibrils after incubation as imaged by electron microscopy. (2) The interaction with nucleic acid enhances the self-assembly for the wild type but triggers quick aggregation for three mutants. (3) A membrane-interacting subdomain has been identified over residues Met311-Gln343 indispensable for TDP-43 neurotoxicity, which transforms into a well-folded Omega-loop-helix structure in membrane environments. Furthermore, despite having very similar membrane-embedded conformations, three mutants will undergo further self-association in the membrane environment. Our study implies that the TDP-43 prion-like domain appears to have an energy landscape, which allows the assembly of the wild-type sequence into dynamic oligomers only under very limited condition sets, and ALS-causing point mutations are sufficient to remodel it to more favor the amyloid formation or irreversible aggregation, thus supporting the emerging view that the pathologic aggregation may occur via the exaggeration of functionally important assemblies. Furthermore, the coupled capacity of TDP-43 in aggregation and membrane interaction may critically account for its high neurotoxicity, and therefore its decoupling may represent a promising therapeutic strategy to treat TDP-43 causing neurodegenerative diseases. | ||
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| + | ALS-Causing Mutations Significantly Perturb the Self-Assembly and Interaction with Nucleic Acid of the Intrinsically Disordered Prion-Like Domain of TDP-43.,Lim L, Wei Y, Lu Y, Song J PLoS Biol. 2016 Jan 6;14(1):e1002338. doi: 10.1371/journal.pbio.1002338. , eCollection 2016 Jan. PMID:26735904<ref>PMID:26735904</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 2n2c" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| - | [[Category: | + | [[Category: Homo sapiens]] |
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
| - | [[Category: Lim | + | [[Category: Lim L]] |
| - | [[Category: Song | + | [[Category: Song J]] |
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Revision as of 08:14, 8 March 2023
NMR Structure of TDP-43 prion-like hydrophobic helix in DPC
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