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==Structure of the DEAD domain of Human eukaryotic initiation factor 4A, eIF4A== | |||
<StructureSection load='2g9n' size='340' side='right'caption='[[2g9n]], [[Resolution|resolution]] 2.25Å' scene=''> | |||
| | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2g9n]] 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=2G9N OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2G9N FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.25Å</td></tr> | |||
| | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MLY:N-DIMETHYL-LYSINE'>MLY</scene></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=2g9n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2g9n OCA], [https://pdbe.org/2g9n PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2g9n RCSB], [https://www.ebi.ac.uk/pdbsum/2g9n PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2g9n ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/IF4A1_HUMAN IF4A1_HUMAN] ATP-dependent RNA helicase which is a subunit of the eIF4F complex involved in cap recognition and is required for mRNA binding to ribosome. In the current model of translation initiation, eIF4A unwinds RNA secondary structures in the 5'-UTR of mRNAs which is necessary to allow efficient binding of the small ribosomal subunit, and subsequent scanning for the initiator codon.<ref>PMID:19153607</ref> <ref>PMID:19204291</ref> | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/g9/2g9n_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2g9n ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
DEAD-box RNA helicases play various, often critical, roles in all processes where RNAs are involved. Members of this family of proteins are linked to human disease, including cancer and viral infections. DEAD-box proteins contain two conserved domains that both contribute to RNA and ATP binding. Despite recent advances the molecular details of how these enzymes convert chemical energy into RNA remodeling is unknown. We present crystal structures of the isolated DEAD-domains of human DDX2A/eIF4A1, DDX2B/eIF4A2, DDX5, DDX10/DBP4, DDX18/myc-regulated DEAD-box protein, DDX20, DDX47, DDX52/ROK1, and DDX53/CAGE, and of the helicase domains of DDX25 and DDX41. Together with prior knowledge this enables a family-wide comparative structural analysis. We propose a general mechanism for opening of the RNA binding site. This analysis also provides insights into the diversity of DExD/H- proteins, with implications for understanding the functions of individual family members. | |||
Comparative structural analysis of human DEAD-box RNA helicases.,Schutz P, Karlberg T, van den Berg S, Collins R, Lehtio L, Hogbom M, Holmberg-Schiavone L, Tempel W, Park HW, Hammarstrom M, Moche M, Thorsell AG, Schuler H PLoS One. 2010 Sep 30;5(9). pii: e12791. PMID:20941364<ref>PMID:20941364</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2g9n" style="background-color:#fffaf0;"></div> | |||
== | ==See Also== | ||
*[[Eukaryotic initiation factor 3D structures|Eukaryotic initiation factor 3D structures]] | |||
*[[Helicase 3D structures|Helicase 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Arrowsmith | [[Category: Arrowsmith C]] | ||
[[Category: Berglund H]] | |||
[[Category: Berglund | [[Category: Collins R]] | ||
[[Category: Collins | [[Category: Edwards A]] | ||
[[Category: Edwards | [[Category: Ehn M]] | ||
[[Category: Ehn | [[Category: Flodin S]] | ||
[[Category: Flodin | [[Category: Flores A]] | ||
[[Category: Flores | [[Category: Graslund S]] | ||
[[Category: Graslund | [[Category: Hallberg BM]] | ||
[[Category: Hallberg | [[Category: Hammarstrom M]] | ||
[[Category: Hammarstrom | [[Category: Hogbom M]] | ||
[[Category: Hogbom | [[Category: Holmberg-Schiavone L]] | ||
[[Category: Holmberg-Schiavone | [[Category: Kotenyova T]] | ||
[[Category: Kotenyova | [[Category: Nilsson-Ehle P]] | ||
[[Category: Nilsson-Ehle | [[Category: Nordlund P]] | ||
[[Category: Nordlund | [[Category: Nyman T]] | ||
[[Category: Nyman | [[Category: Ogg D]] | ||
[[Category: Ogg | [[Category: Persson C]] | ||
[[Category: Persson | [[Category: Sagemark J]] | ||
[[Category: Stenmark P]] | |||
[[Category: Sagemark | [[Category: Sundstrom M]] | ||
[[Category: Stenmark | [[Category: Thorsell AG]] | ||
[[Category: Sundstrom | [[Category: Uppenberg J]] | ||
[[Category: Thorsell | [[Category: Van Den Berg S]] | ||
[[Category: Uppenberg | [[Category: Weigelt J]] | ||
[[Category: | |||
[[Category: | |||
Latest revision as of 12:37, 30 August 2023
Structure of the DEAD domain of Human eukaryotic initiation factor 4A, eIF4AStructure of the DEAD domain of Human eukaryotic initiation factor 4A, eIF4A
Structural highlights
FunctionIF4A1_HUMAN ATP-dependent RNA helicase which is a subunit of the eIF4F complex involved in cap recognition and is required for mRNA binding to ribosome. In the current model of translation initiation, eIF4A unwinds RNA secondary structures in the 5'-UTR of mRNAs which is necessary to allow efficient binding of the small ribosomal subunit, and subsequent scanning for the initiator codon.[1] [2] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedDEAD-box RNA helicases play various, often critical, roles in all processes where RNAs are involved. Members of this family of proteins are linked to human disease, including cancer and viral infections. DEAD-box proteins contain two conserved domains that both contribute to RNA and ATP binding. Despite recent advances the molecular details of how these enzymes convert chemical energy into RNA remodeling is unknown. We present crystal structures of the isolated DEAD-domains of human DDX2A/eIF4A1, DDX2B/eIF4A2, DDX5, DDX10/DBP4, DDX18/myc-regulated DEAD-box protein, DDX20, DDX47, DDX52/ROK1, and DDX53/CAGE, and of the helicase domains of DDX25 and DDX41. Together with prior knowledge this enables a family-wide comparative structural analysis. We propose a general mechanism for opening of the RNA binding site. This analysis also provides insights into the diversity of DExD/H- proteins, with implications for understanding the functions of individual family members. Comparative structural analysis of human DEAD-box RNA helicases.,Schutz P, Karlberg T, van den Berg S, Collins R, Lehtio L, Hogbom M, Holmberg-Schiavone L, Tempel W, Park HW, Hammarstrom M, Moche M, Thorsell AG, Schuler H PLoS One. 2010 Sep 30;5(9). pii: e12791. PMID:20941364[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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