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2dok

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[[Image:2dok.jpg|left|200px]]
 
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{{Structure
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==Crystal structure of the PIN domain of human EST1A==
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|PDB= 2dok |SIZE=350|CAPTION= <scene name='initialview01'>2dok</scene>, resolution 1.80&Aring;
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<StructureSection load='2dok' size='340' side='right'caption='[[2dok]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND=
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<table><tr><td colspan='2'>[[2dok]] 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=2DOK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2DOK FirstGlance]. <br>
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|ACTIVITY=
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.8&#8491;</td></tr>
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|GENE= EST1A ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2dok FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2dok OCA], [https://pdbe.org/2dok PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2dok RCSB], [https://www.ebi.ac.uk/pdbsum/2dok PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2dok ProSAT]</span></td></tr>
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|DOMAIN=
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</table>
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|RELATEDENTRY=
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== Function ==
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2dok FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2dok OCA], [http://www.ebi.ac.uk/pdbsum/2dok PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2dok RCSB]</span>
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[https://www.uniprot.org/uniprot/EST1A_HUMAN EST1A_HUMAN] Component of the telomerase ribonucleoprotein (RNP) complex that is essential for the replication of chromosome termini. May have a general role in telomere regulation. Promotes in vitro the ability of TERT to elongate telomeres. Overexpression induces telomere uncapping, chromosomal end-to-end fusions (telomeric DNA persists at the fusion points) and did not perturb TRF2 telomeric localization. Binds to the single-stranded 5'-(GTGTGG)(4)GTGT-3' telomeric DNA, but not to a telomerase RNA template component (TER).<ref>PMID:12676087</ref> <ref>PMID:12699629</ref> <ref>PMID:18974281</ref> <ref>PMID:19060897</ref> <ref>PMID:17053788</ref> Plays a role in nonsense-mediated mRNA decay. Is thought to provide a link to the mRNA degradation machinery as it has endonuclease activity required to initiate NMD, and to serve as an adapter for UPF1 to protein phosphatase 2A (PP2A), thereby triggering UPF1 dephosphorylation. Degrades single-stranded RNA (ssRNA), but not ssDNA or dsRNA.<ref>PMID:12676087</ref> <ref>PMID:12699629</ref> <ref>PMID:18974281</ref> <ref>PMID:19060897</ref> <ref>PMID:17053788</ref>
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}}
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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'''Crystal structure of the PIN domain of human EST1A'''
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/do/2dok_consurf.spt"</scriptWhenChecked>
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==Overview==
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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Saccharomyces cerevisiae Est1p is a telomerase-associated protein essential for telomere length homeostasis. hEST1A is one of the three human Est1p homologues and is considered to be involved not only in regulation of telomere elongation or capping but also in nonsense-mediated degradation of RNA. hEST1A is composed of two conserved regions, Est1p homology and PIN (PilT N-terminus) domains. The present study shows the crystal structure of the PIN domain at 1.8 A resolution. The overall structure is composed of an alpha/beta fold or a core structure similar to the counterpart of 5' nucleases and an extended structure absent from archaeal PIN-domain proteins and 5' nucleases. The structural properties of the PIN domain indicate its putative active center consisting of invariant acidic amino acid residues, which is geometrically similar to the active center of 5' nucleases and an archaeal PAE2754 PIN-domain protein associated with exonuclease activity.
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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==About this Structure==
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</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=2dok ConSurf].
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2DOK is a [[Single protein]] structure of 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=2DOK OCA].
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<div style="clear:both"></div>
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== References ==
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==Reference==
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<references/>
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Crystal structure of the PIN domain of human telomerase-associated protein EST1A., Takeshita D, Zenno S, Lee WC, Saigo K, Tanokura M, Proteins. 2007 Sep 1;68(4):980-9. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17557331 17557331]
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__TOC__
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Takeshita, D.]]
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[[Category: Takeshita D]]
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[[Category: telomerase-associated protein]]
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[[Category: unknown function]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 02:37:31 2008''
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Current revision

Crystal structure of the PIN domain of human EST1A

PDB ID 2dok

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