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| | ==STAPHYLOCOCCAL NUCLEASE, V23C VARIANT== | | ==STAPHYLOCOCCAL NUCLEASE, V23C VARIANT== |
| - | <StructureSection load='1nuc' size='340' side='right' caption='[[1nuc]], [[Resolution|resolution]] 1.90Å' scene=''> | + | <StructureSection load='1nuc' size='340' side='right'caption='[[1nuc]], [[Resolution|resolution]] 1.90Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1nuc]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"micrococcus_aureus"_(rosenbach_1884)_zopf_1885 "micrococcus aureus" (rosenbach 1884) zopf 1885]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NUC OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1NUC FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1nuc]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NUC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1NUC FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=THP:THYMIDINE-3,5-DIPHOSPHATE'>THP</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]] 1.9Å</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Micrococcal_nuclease Micrococcal nuclease], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.31.1 3.1.31.1] </span></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=THP:THYMIDINE-3,5-DIPHOSPHATE'>THP</scene></td></tr> |
| - | <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=1nuc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1nuc OCA], [http://pdbe.org/1nuc PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1nuc RCSB], [http://www.ebi.ac.uk/pdbsum/1nuc PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1nuc ProSAT]</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=1nuc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1nuc OCA], [https://pdbe.org/1nuc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1nuc RCSB], [https://www.ebi.ac.uk/pdbsum/1nuc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1nuc ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/NUC_STAAU NUC_STAAU]] Enzyme that catalyzes the hydrolysis of both DNA and RNA at the 5' position of the phosphodiester bond. | + | [https://www.uniprot.org/uniprot/NUC_STAAU NUC_STAAU] Enzyme that catalyzes the hydrolysis of both DNA and RNA at the 5' position of the phosphodiester bond. |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | </div> | | </div> |
| | <div class="pdbe-citations 1nuc" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 1nuc" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Staphylococcal nuclease 3D structures|Staphylococcal nuclease 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Micrococcal nuclease]] | + | [[Category: Large Structures]] |
| - | [[Category: Fox, R O]] | + | [[Category: Staphylococcus aureus]] |
| - | [[Category: Harkins, P C]] | + | [[Category: Fox RO]] |
| - | [[Category: Richards, F M]] | + | [[Category: Harkins PC]] |
| - | [[Category: Wynn, R]] | + | [[Category: Richards FM]] |
| - | [[Category: Nuclease]] | + | [[Category: Wynn R]] |
| Structural highlights
Function
NUC_STAAU Enzyme that catalyzes the hydrolysis of both DNA and RNA at the 5' position of the phosphodiester bond.
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 PubMed
The structures of several variants of staphylococcal nuclease with long flexible unnatural amino acid side chains in the hydrophobic core have been determined by X-ray crystallography. The unnatural amino acids are disulfide moieties between the lone cysteine residue in V23C nuclease and methane, ethane, 1-n-propane, 1-n-butane, 1-n-pentane, and 2-hydroxyethyl thiols. We have examined changes in the core packing of these mutants. Side chains as large as the 1-n-propyl cysteine disulfide can be incorporated without perturbation of the structure. This is due, in part, to cavities present in the wild-type protein. The longest side chains are not well defined, even though they remain buried within the protein interior. These results suggest that the enthalpy-entropy balance that governs the rigidity of protein interiors favors tight packing only weakly. Additionally, the tight packing observed normally in protein interiors may reflect, in part, the limited numbers of rotamers available to the natural amino acids.
Mobile unnatural amino acid side chains in the core of staphylococcal nuclease.,Wynn R, Harkins PC, Richards FM, Fox RO Protein Sci. 1996 Jun;5(6):1026-31. PMID:8762134[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Wynn R, Harkins PC, Richards FM, Fox RO. Mobile unnatural amino acid side chains in the core of staphylococcal nuclease. Protein Sci. 1996 Jun;5(6):1026-31. PMID:8762134 doi:http://dx.doi.org/10.1002/pro.5560050605
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