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6tyr

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Current revision

Crystal structure of Laccase from Thermus thermophilus HB27 with a close conformation of its beta-hairpin

Structural highlights

6tyr is a 1 chain structure with sequence from Thermus thermophilus HB27. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.813Å
Ligands:	, ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

Q72HW2_THET2

Publication Abstract from PubMed

The multi-copper oxidase from the hyper-thermophilic bacteria Thermus thermophilus (Tth-MCO), has been previously characterized and described as an example of a laccase with low catalytic properties, especially when it is compared with the activity of fungal laccases, but it is active at high temperatures. Structurally, Tth-MCO has a unique feature: a beta-hairpin near the T1Cu site, which is not present in any other laccases deposited at the PDB. This beta-hairpin has an expected crystallographic behavior in solvent-exposed areas of a crystallized protein: lack of electron density, high B-values and several crystalline contacts with neighboring crystallographic copies; however, its dynamical behavior in solution and its biological implications have not been described. Here, we describe four new Tth-MCO crystallographic structures, and the beta-hairpin behavior has been analyzed by molecular dynamics simulations, considering the effect of pH and temperature. The beta-hairpin new crystallographic conformations described here, together with their dynamics, were used to understand the pH-restrained laccase activity of Tth-MCO against substrates as syringaldazine. Remarkably, there are insertions in laccases from Thermus and Meiothermus genus, sharing the same position and a methionine-rich composition of the Tth-MCO beta-hairpin. This unique high methionine content of the Tth-MCO beta-hairpin is responsible to coordinate, Ag(+1) and Hg(+1) in oxidative conditions, but Cu(+1) and Cu(+2) are not coordinated in crystallographic experiments, regardless of the redox conditions; however, Ag(+1) addition does not affect Tth-MCO laccase activity against syringaldazine. Here, we propose that the pH-dependent beta-hairpin dynamical behavior could explain, at least in part, the inefficient laccase activity displayed by Tth-MCO in acidic pH values.

The beta-hairpin from the Thermus thermophilus HB27 laccase works as a pH-dependent switch to regulate laccase activity.,Miranda-Blancas R, Avelar M, Rodriguez-Arteaga A, Sinicropi A, Rudino-Pinera E J Struct Biol. 2021 Jun;213(2):107740. doi: 10.1016/j.jsb.2021.107740. Epub 2021 , May 5. PMID:33962016^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Miranda-Blancas R, Avelar M, Rodriguez-Arteaga A, Sinicropi A, Rudino-Pinera E. The beta-hairpin from the Thermus thermophilus HB27 laccase works as a pH-dependent switch to regulate laccase activity. J Struct Biol. 2021 Jun;213(2):107740. doi: 10.1016/j.jsb.2021.107740. Epub 2021 , May 5. PMID:33962016 doi:http://dx.doi.org/10.1016/j.jsb.2021.107740

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6tyr"

Categories: Large Structures | Thermus thermophilus HB27 | Miranda-Blancas R | Rudino-Pinera E

@@ Line 3: / Line 3: @@
 <StructureSection load='6tyr' size='340' side='right'caption='[[6tyr]], [[Resolution|resolution]] 1.81&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6tyr]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thet2 Thet2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6TYR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6TYR FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6tyr]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus_HB27 Thermus thermophilus HB27]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6TYR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6TYR FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CIT:CITRIC+ACID'>CIT</scene>, <scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.813&#8491;</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TT_C1370 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=262724 THET2])</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CIT:CITRIC+ACID'>CIT</scene>, <scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr>
-<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Laccase Laccase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.10.3.2 1.10.3.2] </span></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=6tyr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6tyr OCA], [https://pdbe.org/6tyr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6tyr RCSB], [https://www.ebi.ac.uk/pdbsum/6tyr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6tyr ProSAT]</span></td></tr>
 </table>
+== Function ==
+[https://www.uniprot.org/uniprot/Q72HW2_THET2 Q72HW2_THET2]
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 25: / Line 26: @@
 __TOC__
 </StructureSection>
-[[Category: Laccase]]
 [[Category: Large Structures]]
-[[Category: Thet2]]
+[[Category: Thermus thermophilus HB27]]
-[[Category: Miranda-Blancas, R]]
+[[Category: Miranda-Blancas R]]
-[[Category: Rudino-Pinera, E]]
+[[Category: Rudino-Pinera E]]
-[[Category: Close loop]]
-[[Category: Multicopper oxidase]]
-[[Category: Oxidoreductase]]

6tyr

From Proteopedia

Current revision

Crystal structure of Laccase from Thermus thermophilus HB27 with a close conformation of its beta-hairpin

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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