4xr7: Difference between revisions

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{{Large structure}}
 
==Structure of the Saccharomyces cerevisiae PAN2-PAN3 core complex==
==Structure of the Saccharomyces cerevisiae PAN2-PAN3 core complex==
<StructureSection load='4xr7' size='340' side='right' caption='[[4xr7]], [[Resolution|resolution]] 3.80&Aring;' scene=''>
<StructureSection load='4xr7' size='340' side='right'caption='[[4xr7]], [[Resolution|resolution]] 3.80&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[4xr7]] is a 12 chain structure. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=4q8j 4q8j]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4XR7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4XR7 FirstGlance]. <br>
<table><tr><td colspan='2'>[[4xr7]] is a 12 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=4q8j 4q8j]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4XR7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4XR7 FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4q8g|4q8g]], [[4q8h|4q8h]]</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]] 3.796&#8491;</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Poly(A)-specific_ribonuclease Poly(A)-specific ribonuclease], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.13.4 3.1.13.4] </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=4xr7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4xr7 OCA], [https://pdbe.org/4xr7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4xr7 RCSB], [https://www.ebi.ac.uk/pdbsum/4xr7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4xr7 ProSAT]</span></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=4xr7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4xr7 OCA], [http://pdbe.org/4xr7 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4xr7 RCSB], [http://www.ebi.ac.uk/pdbsum/4xr7 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4xr7 ProSAT]</span></td></tr>
</table>
</table>
{{Large structure}}
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/PAN2_YEAST PAN2_YEAST]] Catalytic subunit of the poly(A)-nuclease (PAN) deadenylation complex, one of two cytoplasmic mRNA deadenylases involved in mRNA turnover. PAN specifically shortens poly(A) tails of RNA when the poly(A) stretch is bound by poly(A)-binding protein PAB1, which is followed by rapid degradation of the shortened mRNA tails by the CCR4-NOT complex. Deadenylated mRNAs are then degraded by two alternative mechanisms, namely exosome-mediated 3'-5' exonucleolytic degradation, or deadenlyation-dependent mRNA decaping by DCP1-DCP2 and subsequent 5'-3' exonucleolytic degradation by XRN1. May also be involved in post-transcriptional maturation of mRNA poly(A) tails, trimming the tails from their synthesized length to the slightly shorter, apparently messenger-specific length found on newly exported mRNAs. PAN cooperates with protein kinase DUN1 in the regulation of RAD5 mRNA levels and cell survival in response to replicational stress.<ref>PMID:8550599</ref> <ref>PMID:1358757</ref> <ref>PMID:8816488</ref> <ref>PMID:9774670</ref> <ref>PMID:11239395</ref> <ref>PMID:11953437</ref> <ref>PMID:15630021</ref> <ref>PMID:15894541</ref> [[http://www.uniprot.org/uniprot/PAN3_YEAST PAN3_YEAST]] Regulatory subunit of the poly(A)-nuclease (PAN) deadenylation complex, one of two cytoplasmic mRNA deadenylases involved in mRNA turnover. PAN specifically shortens poly(A) tails of RNA when the poly(A) stretch is bound by poly(A)-binding protein PAB1, which is followed by rapid degradation of the shortened mRNA tails by the CCR4-NOT complex. Deadenylated mRNAs are then degraded by two alternative mechanisms, namely exosome-mediated 3'-5' exonucleolytic degradation, or deadenlyation-dependent mRNA decaping by DCP1-DCP2 and subsequent 5'-3' exonucleolytic degradation by XRN1. May also be involved in post-transcriptional maturation of mRNA poly(A) tails, trimming the tails from their synthesized length to the slightly shorter, apparently messenger-specific length found on newly exported mRNAs.. PAN3 acts as a positive regulator for PAN activity, recruiting the catalytic subunit PAN2 to mRNA via its interaction with PAB1. PAN cooperates with protein kinase DUN1 in the regulation of RAD5 mRNA levels and cell survival in response to replicational stress.<ref>PMID:8816488</ref> <ref>PMID:1358757</ref> <ref>PMID:9774670</ref> <ref>PMID:11953437</ref> <ref>PMID:15894541</ref> 
[https://www.uniprot.org/uniprot/PAN2_YEAST PAN2_YEAST] Catalytic subunit of the poly(A)-nuclease (PAN) deadenylation complex, one of two cytoplasmic mRNA deadenylases involved in mRNA turnover. PAN specifically shortens poly(A) tails of RNA when the poly(A) stretch is bound by poly(A)-binding protein PAB1, which is followed by rapid degradation of the shortened mRNA tails by the CCR4-NOT complex. Deadenylated mRNAs are then degraded by two alternative mechanisms, namely exosome-mediated 3'-5' exonucleolytic degradation, or deadenlyation-dependent mRNA decaping by DCP1-DCP2 and subsequent 5'-3' exonucleolytic degradation by XRN1. May also be involved in post-transcriptional maturation of mRNA poly(A) tails, trimming the tails from their synthesized length to the slightly shorter, apparently messenger-specific length found on newly exported mRNAs. PAN cooperates with protein kinase DUN1 in the regulation of RAD5 mRNA levels and cell survival in response to replicational stress.<ref>PMID:8550599</ref> <ref>PMID:1358757</ref> <ref>PMID:8816488</ref> <ref>PMID:9774670</ref> <ref>PMID:11239395</ref> <ref>PMID:11953437</ref> <ref>PMID:15630021</ref> <ref>PMID:15894541</ref>  
<div style="background-color:#fffaf0;">
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
== Publication Abstract from PubMed ==
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==See Also==
==See Also==
*[[Ribonuclease|Ribonuclease]]
*[[Ribonuclease 3D structures|Ribonuclease 3D structures]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Bonneau, F]]
[[Category: Large Structures]]
[[Category: Conti, E]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Rode, M]]
[[Category: Bonneau F]]
[[Category: Schafer, I B]]
[[Category: Conti E]]
[[Category: Schussler, S]]
[[Category: Rode M]]
[[Category: Deadenylation]]
[[Category: Schafer IB]]
[[Category: Hydrolase]]
[[Category: Schussler S]]
[[Category: Pseudokinase]]
[[Category: Rna degradation]]

Latest revision as of 14:30, 9 May 2024

Structure of the Saccharomyces cerevisiae PAN2-PAN3 core complexStructure of the Saccharomyces cerevisiae PAN2-PAN3 core complex

Structural highlights

4xr7 is a 12 chain structure with sequence from Saccharomyces cerevisiae. This structure supersedes the now removed PDB entry 4q8j. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 3.796Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

PAN2_YEAST Catalytic subunit of the poly(A)-nuclease (PAN) deadenylation complex, one of two cytoplasmic mRNA deadenylases involved in mRNA turnover. PAN specifically shortens poly(A) tails of RNA when the poly(A) stretch is bound by poly(A)-binding protein PAB1, which is followed by rapid degradation of the shortened mRNA tails by the CCR4-NOT complex. Deadenylated mRNAs are then degraded by two alternative mechanisms, namely exosome-mediated 3'-5' exonucleolytic degradation, or deadenlyation-dependent mRNA decaping by DCP1-DCP2 and subsequent 5'-3' exonucleolytic degradation by XRN1. May also be involved in post-transcriptional maturation of mRNA poly(A) tails, trimming the tails from their synthesized length to the slightly shorter, apparently messenger-specific length found on newly exported mRNAs. PAN cooperates with protein kinase DUN1 in the regulation of RAD5 mRNA levels and cell survival in response to replicational stress.[1] [2] [3] [4] [5] [6] [7] [8]

Publication Abstract from PubMed

Pan2-Pan3 is a conserved complex involved in the shortening of mRNA poly(A) tails, the initial step in eukaryotic mRNA turnover. We show that recombinant Saccharomyces cerevisiae Pan2-Pan3 can deadenylate RNAs in vitro without needing the poly(A)-binding protein Pab1. The crystal structure of an active ~200-kDa core complex reveals that Pan2 and Pan3 interact with an unusual 1:2 stoichiometry imparted by the asymmetric nature of the Pan3 homodimer. An extended region of Pan2 wraps around Pan3 and provides a major anchoring point for complex assembly. A Pan2 module formed by the pseudoubiquitin-hydrolase and RNase domains latches onto the Pan3 pseudokinase with intertwined interactions that orient the deadenylase active site toward the A-binding site of the interacting Pan3. The molecular architecture of Pan2-Pan3 suggests how the nuclease and its pseudokinase regulator act in synergy to promote deadenylation.

The structure of the Pan2-Pan3 core complex reveals cross-talk between deadenylase and pseudokinase.,Schafer IB, Rode M, Bonneau F, Schussler S, Conti E Nat Struct Mol Biol. 2014 Jun 1. doi: 10.1038/nsmb.2834. PMID:24880344[9]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

See Also

References

  1. ↑ Boeck R, Tarun S Jr, Rieger M, Deardorff JA, Muller-Auer S, Sachs AB. The yeast Pan2 protein is required for poly(A)-binding protein-stimulated poly(A)-nuclease activity. J Biol Chem. 1996 Jan 5;271(1):432-8. PMID:8550599
  2. ↑ Lowell JE, Rudner DZ, Sachs AB. 3'-UTR-dependent deadenylation by the yeast poly(A) nuclease. Genes Dev. 1992 Nov;6(11):2088-99. PMID:1358757
  3. ↑ Brown CE, Tarun SZ Jr, Boeck R, Sachs AB. PAN3 encodes a subunit of the Pab1p-dependent poly(A) nuclease in Saccharomyces cerevisiae. Mol Cell Biol. 1996 Oct;16(10):5744-53. PMID:8816488
  4. ↑ Brown CE, Sachs AB. Poly(A) tail length control in Saccharomyces cerevisiae occurs by message-specific deadenylation. Mol Cell Biol. 1998 Nov;18(11):6548-59. PMID:9774670
  5. ↑ Tucker M, Valencia-Sanchez MA, Staples RR, Chen J, Denis CL, Parker R. The transcription factor associated Ccr4 and Caf1 proteins are components of the major cytoplasmic mRNA deadenylase in Saccharomyces cerevisiae. Cell. 2001 Feb 9;104(3):377-86. PMID:11239395
  6. ↑ Hammet A, Pike BL, Heierhorst J. Posttranscriptional regulation of the RAD5 DNA repair gene by the Dun1 kinase and the Pan2-Pan3 poly(A)-nuclease complex contributes to survival of replication blocks. J Biol Chem. 2002 Jun 21;277(25):22469-74. Epub 2002 Apr 12. PMID:11953437 doi:http://dx.doi.org/10.1074/jbc.M202473200
  7. ↑ Dunn EF, Hammell CM, Hodge CA, Cole CN. Yeast poly(A)-binding protein, Pab1, and PAN, a poly(A) nuclease complex recruited by Pab1, connect mRNA biogenesis to export. Genes Dev. 2005 Jan 1;19(1):90-103. PMID:15630021 doi:http://dx.doi.org/19/1/90
  8. ↑ Dheur S, Nykamp KR, Viphakone N, Swanson MS, Minvielle-Sebastia L. Yeast mRNA Poly(A) tail length control can be reconstituted in vitro in the absence of Pab1p-dependent Poly(A) nuclease activity. J Biol Chem. 2005 Jul 1;280(26):24532-8. Epub 2005 May 12. PMID:15894541 doi:http://dx.doi.org/M504720200
  9. ↑ Schafer IB, Rode M, Bonneau F, Schussler S, Conti E. The structure of the Pan2-Pan3 core complex reveals cross-talk between deadenylase and pseudokinase. Nat Struct Mol Biol. 2014 Jun 1. doi: 10.1038/nsmb.2834. PMID:24880344 doi:http://dx.doi.org/10.1038/nsmb.2834

4xr7, resolution 3.80Å

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