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EnglishThe thioredoxin system of the archaeon Sulfolobus solfataricus involves a number of different proteins: two thioredoxin reductases (SsTrxRB2 and SsTrxRB3), two distinct thioredoxins (SsTrxA1 and SsTrxA2) and a disulfide oxidoreductase (SsPDO). Here, the crystallization and preliminary crystallo- graphic analyses of SsTrxA1 and SsTrxA2, two dimeric proteins endowed with extraordinary thermal stability, are reported. In addition to the functional thioredoxin domain, both SsTrxA1 and SsTrxA2 present an extra N-terminal fragment of approximately 30 residues. Although crystallization trials have been conducted on both forms of the proteins, crystals that were suitable for X-ray crystallographic analyses have only been obtained for their truncated variants. The crystals of SsTrxA2 belonged to space group P2, with unit-cell parameters a = 28.27, b = 27.88, c = 62.06 A ̊ , = 92.34, and diffracted to 1.83 A ̊ resolution, whereas the crystals of SsTrxA1 belonged to space group P21, with unit-cell parameters a = 51.76, b = 75.09, c = 55.35 A ̊ , = 112.64 , and diffracted to 1.90 A ̊ resolution. The structures of the two proteins have been solved by molecular replacement.
| Titolo: | Crystallization and preliminary X-ray crystallographic analysis of two dimeric hyperthermostable thioredoxins isolated from Sulfolobus solfataricus | |
| Autori: | ||
| Data di pubblicazione: | 2009 | |
| Rivista: | ||
| Abstract: | The thioredoxin system of the archaeon Sulfolobus solfataricus involves a number of different proteins: two thioredoxin reductases (SsTrxRB2 and SsTrxRB3), two distinct thioredoxins (SsTrxA1 and SsTrxA2) and a disulfide oxidoreductase (SsPDO). Here, the crystallization and preliminary crystallo- graphic analyses of SsTrxA1 and SsTrxA2, two dimeric proteins endowed with extraordinary thermal stability, are reported. In addition to the functional thioredoxin domain, both SsTrxA1 and SsTrxA2 present an extra N-terminal fragment of approximately 30 residues. Although crystallization trials have been conducted on both forms of the proteins, crystals that were suitable for X-ray crystallographic analyses have only been obtained for their truncated variants. The crystals of SsTrxA2 belonged to space group P2, with unit-cell parameters a = 28.27, b = 27.88, c = 62.06 A ̊ , = 92.34, and diffracted to 1.83 A ̊ resolution, whereas the crystals of SsTrxA1 belonged to space group P21, with unit-cell parameters a = 51.76, b = 75.09, c = 55.35 A ̊ , = 112.64 , and diffracted to 1.90 A ̊ resolution. The structures of the two proteins have been solved by molecular replacement. | |
| Handle: | http://hdl.handle.net/11367/26001 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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