2ba1
From Proteopedia
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|PDB= 2ba1 |SIZE=350|CAPTION= <scene name='initialview01'>2ba1</scene>, resolution 2.7Å | |PDB= 2ba1 |SIZE=350|CAPTION= <scene name='initialview01'>2ba1</scene>, resolution 2.7Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=ZN:ZINC ION'>ZN</scene> | + | |LIGAND= <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[2ba0|2BA0]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ba1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ba1 OCA], [http://www.ebi.ac.uk/pdbsum/2ba1 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2ba1 RCSB]</span> | ||
}} | }} | ||
| Line 25: | Line 28: | ||
[[Category: Hopfner, K P.]] | [[Category: Hopfner, K P.]] | ||
[[Category: Wenig, K.]] | [[Category: Wenig, K.]] | ||
| - | [[Category: ZN]] | ||
[[Category: archaeal]] | [[Category: archaeal]] | ||
[[Category: exoribonuclease]] | [[Category: exoribonuclease]] | ||
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[[Category: zn-ribbon]] | [[Category: zn-ribbon]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 02:03:29 2008'' |
Revision as of 23:03, 30 March 2008
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| , resolution 2.7Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Related: | 2BA0
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Archaeal exosome core
Overview
Exosomes emerge as central 3'-->5' RNA processing and degradation machineries in eukaryotes and archaea. We determined crystal structures of two 230 kDa nine subunit archaeal exosome isoforms. Both exosome isoforms contain a hexameric ring of RNase phosphorolytic (PH) domain subunits with a central chamber. Tungstate soaks identified three phosphorolytic active sites in this processing chamber. A trimer of Csl4 or Rrp4 subunits forms a multidomain macromolecular interaction surface on the RNase-PH domain ring with central S1 domains and peripheral KH and zinc-ribbon domains. Structural and mutational analyses suggest that the S1 domains and a subsequent neck in the RNase-PH domain ring form an RNA entry pore to the processing chamber that only allows access of unstructured RNA. This structural framework can mechanistically unify observed features of exosomes, including processive degradation of unstructured RNA, the requirement for regulatory factors to degrade structured RNA, and left-over tails in rRNA trimming.
About this Structure
2BA1 is a Protein complex structure of sequences from Archaeoglobus fulgidus. Full crystallographic information is available from OCA.
Reference
Structural framework for the mechanism of archaeal exosomes in RNA processing., Buttner K, Wenig K, Hopfner KP, Mol Cell. 2005 Nov 11;20(3):461-71. PMID:16285927
Page seeded by OCA on Mon Mar 31 02:03:29 2008
