3t5x: Difference between revisions

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==PCID2:DSS1 Structure==
==PCID2:DSS1 Structure==
<StructureSection load='3t5x' size='340' side='right' caption='[[3t5x]], [[Resolution|resolution]] 2.12&Aring;' scene=''>
<StructureSection load='3t5x' size='340' side='right'caption='[[3t5x]], [[Resolution|resolution]] 2.12&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3t5x]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3T5X OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3T5X FirstGlance]. <br>
<table><tr><td colspan='2'>[[3t5x]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3T5X OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3T5X FirstGlance]. <br>
</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PCID2, HT004 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]), SHFM1, DSS1, SHFDG1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.123&#8491;</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3t5x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3t5x OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3t5x RCSB], [http://www.ebi.ac.uk/pdbsum/3t5x PDBsum]</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=3t5x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3t5x OCA], [https://pdbe.org/3t5x PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3t5x RCSB], [https://www.ebi.ac.uk/pdbsum/3t5x PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3t5x ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/PCID2_HUMAN PCID2_HUMAN]] Required for B-cell survival through the regulation of the expression of cell-cycle checkpoint MAD2L1 protein during B cell differentiation (By similarity). Component of the TREX-2 complex (transcription and export complex 2), composed of at least ENY2, GANP, PCID2, DSS1, and either centrin CETN2 or CETN3 (PubMed:22307388). The TREX-2 complex functions in docking export-competent ribonucleoprotein particles (mRNPs) to the nuclear entrance of the nuclear pore complex (nuclear basket). TREX-2 participates in mRNA export and accurate chromatin positioning in the nucleus by tethering genes to the nuclear periphery. Binds and stabilizes BRCA2 and is thus involved in the control of R-loop-associated DNA damage and transcription-associated genomic instability. R-loop accumulation does not increase in PCID2-depleted cells.<ref>PMID:22307388</ref> <ref>PMID:24896180</ref>  [[http://www.uniprot.org/uniprot/DSS1_HUMAN DSS1_HUMAN]] Subunit of the 26S proteasome which plays a role in ubiquitin-dependent proteolysis.<ref>PMID:15117943</ref> 
[https://www.uniprot.org/uniprot/PCID2_HUMAN PCID2_HUMAN] Required for B-cell survival through the regulation of the expression of cell-cycle checkpoint MAD2L1 protein during B cell differentiation (By similarity). Component of the TREX-2 complex (transcription and export complex 2), composed of at least ENY2, GANP, PCID2, DSS1, and either centrin CETN2 or CETN3 (PubMed:22307388). The TREX-2 complex functions in docking export-competent ribonucleoprotein particles (mRNPs) to the nuclear entrance of the nuclear pore complex (nuclear basket). TREX-2 participates in mRNA export and accurate chromatin positioning in the nucleus by tethering genes to the nuclear periphery. Binds and stabilizes BRCA2 and is thus involved in the control of R-loop-associated DNA damage and transcription-associated genomic instability. R-loop accumulation does not increase in PCID2-depleted cells.<ref>PMID:22307388</ref> <ref>PMID:24896180</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The conserved TREX-2 transcription-export complex integrates transcription and processing of many actively transcribed nascent mRNAs with the recruitment of export factors at nuclear pores and also contributes to transcriptional memory and genomic stability. We report the crystal structure of the Sac3-Thp1-Sem1 segment of Saccharomyces cerevisiae TREX-2 that interfaces with the gene expression machinery. Sac3-Thp1-Sem1 forms a previously uncharacterized PCI-domain complex characterized by the juxtaposition of Sac3 and Thp1 winged helix domains, forming a platform that mediates nucleic acid binding. Our structure-guided mutations support the idea that the Thp1-Sac3 interaction is an essential requirement for mRNA binding and for the coupling of transcription and processing to mRNP assembly and export. These results provide insight into how newly synthesized transcripts are efficiently transferred from TREX-2 to the principal mRNA export factor, and they reveal how Sem1 stabilizes PCI domain-containing proteins and promotes complex assembly.
 
Structural basis for the assembly and nucleic acid binding of the TREX-2 transcription-export complex.,Ellisdon AM, Dimitrova L, Hurt E, Stewart M Nat Struct Mol Biol. 2012 Feb 19;19(3):328-36. doi: 10.1038/nsmb.2235. PMID:22343721<ref>PMID:22343721</ref>
 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>


==See Also==
==See Also==
*[[Proteasome|Proteasome]]
*[[Proteasome 3D structures|Proteasome 3D structures]]
== References ==
== References ==
<references/>
<references/>
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</StructureSection>
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Ellisdon, A M]]
[[Category: Large Structures]]
[[Category: Stewart, M]]
[[Category: Ellisdon AM]]
[[Category: Mrna nuclear export]]
[[Category: Stewart M]]
[[Category: Pci]]
[[Category: Transcription]]

Latest revision as of 13:04, 1 March 2024

PCID2:DSS1 StructurePCID2:DSS1 Structure

Structural highlights

3t5x is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.123Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

PCID2_HUMAN Required for B-cell survival through the regulation of the expression of cell-cycle checkpoint MAD2L1 protein during B cell differentiation (By similarity). Component of the TREX-2 complex (transcription and export complex 2), composed of at least ENY2, GANP, PCID2, DSS1, and either centrin CETN2 or CETN3 (PubMed:22307388). The TREX-2 complex functions in docking export-competent ribonucleoprotein particles (mRNPs) to the nuclear entrance of the nuclear pore complex (nuclear basket). TREX-2 participates in mRNA export and accurate chromatin positioning in the nucleus by tethering genes to the nuclear periphery. Binds and stabilizes BRCA2 and is thus involved in the control of R-loop-associated DNA damage and transcription-associated genomic instability. R-loop accumulation does not increase in PCID2-depleted cells.[1] [2]

See Also

References

  1. ↑ Jani D, Lutz S, Hurt E, Laskey RA, Stewart M, Wickramasinghe VO. Functional and structural characterization of the mammalian TREX-2 complex that links transcription with nuclear messenger RNA export. Nucleic Acids Res. 2012 May 1;40(10):4562-73. Epub 2012 Feb 4. PMID:22307388 doi:10.1093/nar/gks059
  2. ↑ Bhatia V, Barroso SI, Garcia-Rubio ML, Tumini E, Herrera-Moyano E, Aguilera A. BRCA2 prevents R-loop accumulation and associates with TREX-2 mRNA export factor PCID2. Nature. 2014 Jul 17;511(7509):362-5. doi: 10.1038/nature13374. Epub 2014 Jun 1. PMID:24896180 doi:http://dx.doi.org/10.1038/nature13374

3t5x, resolution 2.12Å

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