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3ut7

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==Structural view of a non Pfam singleton and crystal packing analysis==
==Structural view of a non Pfam singleton and crystal packing analysis==
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<StructureSection load='3ut7' size='340' side='right' caption='[[3ut7]], [[Resolution|resolution]] 3.01&Aring;' scene=''>
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<StructureSection load='3ut7' size='340' side='right'caption='[[3ut7]], [[Resolution|resolution]] 3.01&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[3ut7]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Clostridium_thermocellum Clostridium thermocellum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3UT7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3UT7 FirstGlance]. <br>
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<table><tr><td colspan='2'>[[3ut7]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Acetivibrio_thermocellus_ATCC_27405 Acetivibrio thermocellus ATCC 27405]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3UT7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3UT7 FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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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]] 3.01&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3ut4|3ut4]], [[3ut8|3ut8]]</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Cthe_2751 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1515 Clostridium thermocellum])</td></tr>
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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=3ut7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ut7 OCA], [https://pdbe.org/3ut7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3ut7 RCSB], [https://www.ebi.ac.uk/pdbsum/3ut7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3ut7 ProSAT]</span></td></tr>
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<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=3ut7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ut7 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3ut7 RCSB], [http://www.ebi.ac.uk/pdbsum/3ut7 PDBsum]</span></td></tr>
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</table>
</table>
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<div style="background-color:#fffaf0;">
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== Function ==
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== Publication Abstract from PubMed ==
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[https://www.uniprot.org/uniprot/A3DJ21_ACET2 A3DJ21_ACET2]
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BACKGROUND: Comparative genomic analysis has revealed that in each genome a large number of open reading frames have no homologues in other species. Such singleton genes have attracted the attention of biochemists and structural biologists as a potential untapped source of new folds. Cthe_2751 is a 15.8 kDa singleton from an anaerobic, hyperthermophile Clostridium thermocellum. To gain insights into the architecture of the protein and obtain clues about its function, we decided to solve the structure of Cthe_2751. RESULTS: The protein crystallized in 4 different space groups that diffracted X-rays to 2.37 A (P3(1)21), 2.17 A (P2(1)2(1)2(1)), 3.01 A (P4(1)22), and 2.03 A (C222(1)) resolution, respectively. Crystal packing analysis revealed that the 3-D packing of Cthe_2751 dimers in P4(1)22 and C222(1) is similar with only a rotational difference of 2.69 degrees around the C axes. A new method developed to quantify the differences in packing of dimers in crystals from different space groups corroborated the findings of crystal packing analysis. Cthe_2751 is an all alpha-helical protein with a central hydrophobic core providing thermal stability via pi:cation and pi: pi interactions. A ProFunc analysis retrieved a very low match with a splicing endonuclease, suggesting a role for the protein in the processing of nucleic acids. CONCLUSIONS: Non-Pfam singleton Cthe_2751 folds into a known all alpha-helical fold. The structure has increased sequence coverage of non-Pfam proteins such that more protein sequences can be amenable to modelling. Our work on crystal packing analysis provides a new method to analyze dimers of the protein crystallized in different space groups. The utility of such an analysis can be expanded to oligomeric structures of other proteins, especially receptors and signaling molecules, many of which are known to function as oligomers.
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Structural view of a non pfam singleton and crystal packing analysis.,Cheng C, Shaw N, Zhang X, Zhang M, Ding W, Wang BC, Liu ZJ PLoS One. 2012;7(2):e31673. Epub 2012 Feb 20. PMID:22363703<ref>PMID:22363703</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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== References ==
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<references/>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Clostridium thermocellum]]
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[[Category: Acetivibrio thermocellus ATCC 27405]]
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[[Category: Cheng, C]]
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[[Category: Large Structures]]
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[[Category: Ding, W]]
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[[Category: Cheng C]]
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[[Category: Liu, Z J]]
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[[Category: Ding W]]
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[[Category: Shaw, N]]
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[[Category: Liu ZJ]]
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[[Category: Wang, B C]]
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[[Category: Shaw N]]
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[[Category: Zhang, M]]
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[[Category: Wang BC]]
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[[Category: Zhang, X]]
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[[Category: Zhang M]]
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[[Category: A non pfam singleton]]
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[[Category: Zhang X]]
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[[Category: Crystal packing analysis]]
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[[Category: Helical fold]]
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[[Category: Unknown function]]
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Current revision

Structural view of a non Pfam singleton and crystal packing analysis

PDB ID 3ut7

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