2bje
From Proteopedia
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| - | [[Image:2bje.gif|left|200px]]<br /> | + | [[Image:2bje.gif|left|200px]]<br /><applet load="2bje" size="450" color="white" frame="true" align="right" spinBox="true" |
| - | <applet load="2bje" size="450" color="white" frame="true" align="right" spinBox="true" | + | |
caption="2bje, resolution 1.90Å" /> | caption="2bje, resolution 1.90Å" /> | ||
'''ACYLPHOSPHATASE FROM SULFOLOBUS SOLFATARICUS. MONCLINIC P21 SPACE GROUP'''<br /> | '''ACYLPHOSPHATASE FROM SULFOLOBUS SOLFATARICUS. MONCLINIC P21 SPACE GROUP'''<br /> | ||
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==About this Structure== | ==About this Structure== | ||
| - | 2BJE is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Sulfolobus_solfataricus Sulfolobus solfataricus] with SO4 and CL as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Acylphosphatase Acylphosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.1.7 3.6.1.7] | + | 2BJE is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Sulfolobus_solfataricus Sulfolobus solfataricus] with SO4 and CL as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Acylphosphatase Acylphosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.1.7 3.6.1.7] Known structural/functional Site: <scene name='pdbsite=AC1:So4 Binding Site For Chain A'>AC1</scene>. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=2BJE OCA]. |
==Reference== | ==Reference== | ||
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[[Category: hydrolase]] | [[Category: hydrolase]] | ||
| - | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Dec 18 18:49:19 2007'' |
Revision as of 16:39, 18 December 2007
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ACYLPHOSPHATASE FROM SULFOLOBUS SOLFATARICUS. MONCLINIC P21 SPACE GROUP
Overview
The structure of AcP from the hyperthermophilic archaeon Sulfolobus, solfataricus has been determined by (1)H-NMR spectroscopy and X-ray, crystallography. Solution and crystal structures (1.27 A resolution, R-factor 13.7%) were obtained on the full-length protein and on an, N-truncated form lacking the first 12 residues, respectively. The overall, Sso AcP fold, starting at residue 13, displays the same, betaalphabetabetaalphabeta topology previously described for other members, of the AcP family from mesophilic sources. The unstructured N-terminal, tail may be crucial for the unusual aggregation mechanism of Sso AcP, previously reported. Sso AcP catalytic activity is reduced at room, temperature but rises at its working temperature to values comparable to, those displayed by its mesophilic counterparts at 25-37 degrees C. Such a, reduced activity can result from protein rigidity and from the active site, stiffening due the presence of a salt bridge between the C-terminal, carboxylate and the active site arginine. Sso AcP is characterized by a, melting temperature, Tm, of 100.8 degrees C and an unfolding free energy, DeltaG(U-F)H2O, at 28 degrees C and 81 degrees C of 48.7 and 20.6 kJ, mol(-1), respectively. The kinetic and structural data indicate that, mesophilic and hyperthermophilic AcP's display similar enzymatic, activities and conformational stabilities at their working conditions., Structural analysis of the factor responsible for Sso AcP thermostability, with respect to mesophilic AcP's revealed the importance of a ion pair, network stabilizing particularly the beta-sheet and the loop connecting, the fourth and fifth strands, together with increased density packing, loop shortening and a higher alpha-helical propensity.
About this Structure
2BJE is a Single protein structure of sequence from Sulfolobus solfataricus with SO4 and CL as ligands. Active as Acylphosphatase, with EC number 3.6.1.7 Known structural/functional Site: . Full crystallographic information is available from OCA.
Reference
Structure, conformational stability, and enzymatic properties of acylphosphatase from the hyperthermophile Sulfolobus solfataricus., Corazza A, Rosano C, Pagano K, Alverdi V, Esposito G, Capanni C, Bemporad F, Plakoutsi G, Stefani M, Chiti F, Zuccotti S, Bolognesi M, Viglino P, Proteins. 2006 Jan 1;62(1):64-79. PMID:16287076
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