1g9k
From Proteopedia
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|PDB= 1g9k |SIZE=350|CAPTION= <scene name='initialview01'>1g9k</scene>, resolution 1.96Å | |PDB= 1g9k |SIZE=350|CAPTION= <scene name='initialview01'>1g9k</scene>, resolution 1.96Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene> | + | |LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> |
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/Serralysin Serralysin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.24.40 3.4.24.40] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Serralysin Serralysin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.24.40 3.4.24.40] </span> |
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1kap|1KAP]], [[1sat|1SAT]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1g9k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1g9k OCA], [http://www.ebi.ac.uk/pdbsum/1g9k PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1g9k RCSB]</span> | ||
}} | }} | ||
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[[Category: Aghajari, N.]] | [[Category: Aghajari, N.]] | ||
[[Category: Haser, R.]] | [[Category: Haser, R.]] | ||
| - | [[Category: CA]] | ||
| - | [[Category: SO4]] | ||
| - | [[Category: ZN]] | ||
[[Category: beta jelly roll]] | [[Category: beta jelly roll]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 20:39:33 2008'' |
Revision as of 17:39, 30 March 2008
| |||||||
| , resolution 1.96Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , | ||||||
| Activity: | Serralysin, with EC number 3.4.24.40 | ||||||
| Related: | 1KAP, 1SAT
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF A PSYCHROPHILIC ALKALINE PROTEASE FROM PSEUDOMONAS TAC II 18
Overview
Enzymes from psychrophilic organisms differ from their mesophilic counterparts in having a lower thermostability and a higher specific activity at low and moderate temperatures. It is in general accepted that psychrophilic enzymes are more flexible to allow easy accommodation and transformation of the substrates at low energy costs. Here, we report the structures of two crystal forms of the alkaline protease from an Antarctic Pseudomonas species (PAP), solved to 2.1- and 1.96-A resolution, respectively. Comparative studies of PAP structures with mesophilic counterparts show that the overall structures are similar but that the conformation of the substrate-free active site in PAP resembles that of the substrate-bound region of the mesophilic homolog, with both an active-site tyrosine and a substrate-binding loop displaying a conformation as in the substrate-bound form of the mesophilic proteases. Further, a region in the catalytic domain of PAP undergoes a conformational change with a loop movement as large as 13 A, induced by the binding of an extra calcium ion. Finally, the active site is more accessible due to deletions occurring in surrounding loop regions.
About this Structure
1G9K is a Single protein structure of sequence from Pseudomonas. Full crystallographic information is available from OCA.
Reference
Crystal structures of a psychrophilic metalloprotease reveal new insights into catalysis by cold-adapted proteases., Aghajari N, Van Petegem F, Villeret V, Chessa JP, Gerday C, Haser R, Van Beeumen J, Proteins. 2003 Mar 1;50(4):636-47. PMID:12577270
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