1mtp
From Proteopedia
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'''The X-ray crystal structure of a serpin from a thermophilic prokaryote''' | '''The X-ray crystal structure of a serpin from a thermophilic prokaryote''' | ||
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[[Category: Rossjohn, J.]] | [[Category: Rossjohn, J.]] | ||
[[Category: Whisstock, J C.]] | [[Category: Whisstock, J C.]] | ||
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| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 01:42:12 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 22:42, 2 May 2008
The X-ray crystal structure of a serpin from a thermophilic prokaryote
Overview
Serpins utilize conformational change to inhibit target proteinases; the price paid for this conformational flexibility is that many undergo temperature-induced polymerization. Despite this thermolability, serpins are present in the genomes of thermophilic prokaryotes, and here we characterize the first such serpin, thermopin. Thermopin is a proteinase inhibitor and, in comparison with human alpha(1)-antitrypsin, possesses enhanced stability at 60 degrees C. The 1.5 A crystal structure reveals novel structural features in regions implicated in serpin folding and stability. Thermopin possesses a C-terminal "tail" that interacts with the top of the A beta sheet and plays an important role in the folding/unfolding of the molecule. These data provide evidence as to how this unusual serpin has adapted to fold and function in a heated environment.
About this Structure
1MTP is a Protein complex structure of sequences from Thermobifida fusca. Full crystallographic information is available from OCA.
Reference
The 1.5 A crystal structure of a prokaryote serpin: controlling conformational change in a heated environment., Irving JA, Cabrita LD, Rossjohn J, Pike RN, Bottomley SP, Whisstock JC, Structure. 2003 Apr;11(4):387-97. PMID:12679017 Page seeded by OCA on Sat May 3 01:42:12 2008
