1ujp
From Proteopedia
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|PDB= 1ujp |SIZE=350|CAPTION= <scene name='initialview01'>1ujp</scene>, resolution 1.34Å | |PDB= 1ujp |SIZE=350|CAPTION= <scene name='initialview01'>1ujp</scene>, resolution 1.34Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=CIT:CITRIC ACID'>CIT</scene> | + | |LIGAND= <scene name='pdbligand=CIT:CITRIC+ACID'>CIT</scene> |
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/Tryptophan_synthase Tryptophan synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.1.20 4.2.1.20] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Tryptophan_synthase Tryptophan synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.1.20 4.2.1.20] </span> |
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ujp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ujp OCA], [http://www.ebi.ac.uk/pdbsum/1ujp PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1ujp RCSB]</span> | ||
}} | }} | ||
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[[Category: RSGI, RIKEN Structural Genomics/Proteomics Initiative.]] | [[Category: RSGI, RIKEN Structural Genomics/Proteomics Initiative.]] | ||
[[Category: Yokoyama, S.]] | [[Category: Yokoyama, S.]] | ||
| - | [[Category: CIT]] | ||
[[Category: riken structural genomics/proteomics initiative]] | [[Category: riken structural genomics/proteomics initiative]] | ||
[[Category: rsgi]] | [[Category: rsgi]] | ||
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[[Category: tryptophan synthase]] | [[Category: tryptophan synthase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:11:13 2008'' |
Revision as of 21:11, 30 March 2008
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| , resolution 1.34Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Activity: | Tryptophan synthase, with EC number 4.2.1.20 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal Structure of Tryptophan Synthase A-Subunit From Thermus thermophilus HB8
Overview
In order to elucidate the thermo-stabilization mechanism of the tryptophan synthase alpha-subunit from the extreme thermophile Thermus thermophilus HB8 (Tt-alpha-subunit), its crystal structure was determined and its stability was examined using DSC. The results were compared to those of other orthologs from mesophilic and hyperthermophilic organisms. The denaturation temperature of the Tt-alpha-subunit was higher than that of the alpha-subunit from S. typhimurium (St-alpha-subunit) but lower than that of the alpha-subunit from P. furiosus (Pf-alpha-subunit). Specific denaturation enthalpy and specific denaturation heat capacity values of the Tt-alpha-subunit were the lowest among the three proteins, suggesting that entropy effects are responsible for the stabilization of the Tt-alpha-subunit. Based on a structural comparison with the St-alpha-subunit, two deletions in loop regions, an increase in the number of ion pairs and a decrease in cavity volume seem to be responsible for the stabilization of the Tt-alpha-subunit. The results of structural comparison suggest that the native structure of the Tt-alpha-subunit is better adapted to an ideally stable structure than that of the St-alpha-subunit, but worse than that of the Pf-alpha-subunit. The results of calorimetry suggest that the residual structure of the Tt-alpha-subunit in the denatured state contributes to the stabilization.
About this Structure
1UJP is a Single protein structure of sequence from Thermus thermophilus. Full crystallographic information is available from OCA.
Reference
Stabilization mechanism of the tryptophan synthase alpha-subunit from Thermus thermophilus HB8: X-ray crystallographic analysis and calorimetry., Asada Y, Sawano M, Ogasahara K, Nakamura J, Ota M, Kuroishi C, Sugahara M, Yutani K, Kunishima N, J Biochem. 2005 Oct;138(4):343-53. PMID:16272128
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