View source for 6eki


==Structure of a hyperthermostable carbonic anhydrase identified from an active hydrothermal vent chimney==
<StructureSection load='6eki' size='340' side='right'caption='[[6eki]], [[Resolution|resolution]] 2.56&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6eki]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Persephonella_marina Persephonella marina]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6EKI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6EKI 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]] 2.555&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</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=6eki FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6eki OCA], [https://pdbe.org/6eki PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6eki RCSB], [https://www.ebi.ac.uk/pdbsum/6eki PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6eki ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Carbonic anhydrases (CAs) are extremely fast enzymes, which have attracted much interest in the past due to their medical relevance and their biotechnological potential. An alpha-type CA gene was isolated from DNA derived from an active hydrothermal vent chimney, in an effort to identify novel CAs with suitable properties for CO2 capture. The gene product was recombinantly produced and characterized, revealing remarkable thermostability, also in the presence of high ionic strength alkaline conditions, which are used in some CO2 capture applications. The Tm was above 90 degrees C under all tested conditions. The enzyme was crystallized and the structure determined by molecular replacement, revealing a typical bacterial alpha-type CA non-covalent dimer, but not the disulphide mediated tetramer observed for the hyperthermophilic homologue used for molecular replacement, from Thermovibrio ammonificans. Structural comparison suggests that an increased secondary structure content, increased content of charges on the surface and ionic interactions compared to mesophilic enzymes, may be main structural sources of thermostability, as previously suggested for the homologue from Sulfurihydrogenibium yellowstonense.

Structure of a hyperthermostable carbonic anhydrase identified from an active hydrothermal vent chimney.,Fredslund F, Borchert MS, Poulsen JN, Mortensen SB, Perner M, Streit WR, Lo Leggio L Enzyme Microb Technol. 2018 Jul;114:48-54. doi: 10.1016/j.enzmictec.2018.03.009. , Epub 2018 Mar 30. PMID:29685353<ref>PMID:29685353</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6eki" style="background-color:#fffaf0;"></div>

==See Also==
*[[Carbonic anhydrase 3D structures|Carbonic anhydrase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Persephonella marina]]
[[Category: Fredslund F]]
[[Category: Lo Leggio L]]
[[Category: Poulsen J-CN]]