1ujp
From Proteopedia
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| - | [[Image:1ujp.jpg|left|200px]] | + | [[Image:1ujp.jpg|left|200px]] |
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| - | '''Crystal Structure of Tryptophan Synthase A-Subunit From Thermus thermophilus HB8''' | + | {{Structure |
| + | |PDB= 1ujp |SIZE=350|CAPTION= <scene name='initialview01'>1ujp</scene>, resolution 1.34Å | ||
| + | |SITE= | ||
| + | |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] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''Crystal Structure of Tryptophan Synthase A-Subunit From Thermus thermophilus HB8''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1UJP is a [ | + | 1UJP is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Thermus_thermophilus Thermus thermophilus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UJP OCA]. |
==Reference== | ==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:[http:// | + | 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:[http://www.ncbi.nlm.nih.gov/pubmed/16272128 16272128] |
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Thermus thermophilus]] | [[Category: Thermus thermophilus]] | ||
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[[Category: riken structural genomics/proteomics initiative]] | [[Category: riken structural genomics/proteomics initiative]] | ||
[[Category: rsgi]] | [[Category: rsgi]] | ||
| - | [[Category: structural | + | [[Category: structural genomic]] |
[[Category: tryptophan]] | [[Category: tryptophan]] | ||
[[Category: tryptophan synthase]] | [[Category: tryptophan synthase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 14:32:50 2008'' |
Revision as of 12:32, 20 March 2008
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| , resolution 1.34Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Activity: | Tryptophan synthase, with EC number 4.2.1.20 | ||||||
| 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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