1sbn: Difference between revisions
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[[Image:1sbn.gif|left|200px]] | [[Image:1sbn.gif|left|200px]] | ||
'''REFINED CRYSTAL STRUCTURES OF SUBTILISIN NOVO IN COMPLEX WITH WILD-TYPE AND TWO MUTANT EGLINS. COMPARISON WITH OTHER SERINE PROTEINASE INHIBITOR COMPLEXES''' | {{Structure | ||
|PDB= 1sbn |SIZE=350|CAPTION= <scene name='initialview01'>1sbn</scene>, resolution 2.1Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=CA:CALCIUM ION'>CA</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Subtilisin Subtilisin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.62 3.4.21.62] | |||
|GENE= | |||
}} | |||
'''REFINED CRYSTAL STRUCTURES OF SUBTILISIN NOVO IN COMPLEX WITH WILD-TYPE AND TWO MUTANT EGLINS. COMPARISON WITH OTHER SERINE PROTEINASE INHIBITOR COMPLEXES''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1SBN is a [ | 1SBN is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Bacillus_subtilis Bacillus subtilis] and [http://en.wikipedia.org/wiki/Hirudo_medicinalis Hirudo medicinalis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SBN OCA]. | ||
==Reference== | ==Reference== | ||
Refined crystal structures of subtilisin novo in complex with wild-type and two mutant eglins. Comparison with other serine proteinase inhibitor complexes., Heinz DW, Priestle JP, Rahuel J, Wilson KS, Grutter MG, J Mol Biol. 1991 Jan 20;217(2):353-71. PMID:[http:// | Refined crystal structures of subtilisin novo in complex with wild-type and two mutant eglins. Comparison with other serine proteinase inhibitor complexes., Heinz DW, Priestle JP, Rahuel J, Wilson KS, Grutter MG, J Mol Biol. 1991 Jan 20;217(2):353-71. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/1992167 1992167] | ||
[[Category: Bacillus subtilis]] | [[Category: Bacillus subtilis]] | ||
[[Category: Hirudo medicinalis]] | [[Category: Hirudo medicinalis]] | ||
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[[Category: complex(proteinase/inhibitor)]] | [[Category: complex(proteinase/inhibitor)]] | ||
''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 14:02:50 2008'' | ||
Revision as of 12:02, 20 March 2008
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| 1sbn, resolution 2.1Å | |||||||||||||
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| Ligands: | CA | ||||||||||||
| Activity: | Subtilisin, with EC number 3.4.21.62 | ||||||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||||||
REFINED CRYSTAL STRUCTURES OF SUBTILISIN NOVO IN COMPLEX WITH WILD-TYPE AND TWO MUTANT EGLINS. COMPARISON WITH OTHER SERINE PROTEINASE INHIBITOR COMPLEXES
Overview
The crystal structures of the complexes formed between subtilisin Novo and three inhibitors, eglin c, Arg45-eglin c and Lys53-eglin c have been determined using molecular replacement and difference Fourier techniques and refined at 2.4 A, 2.1 A, and 2.4 A resolution, respectively. The mutants Arg45-eglin c and Lys53-eglin c were constructed by site-directed mutagenesis in order to investigate the inhibitory specificity and stability of eglin c. Arg45-eglin became a potent trypsin inhibitor, in contrast to native eglin, which is an elastase inhibitor. This specificity change was rationalized by comparing the structures of Arg45-eglin and basic pancreatic trypsin inhibitor and their interactions with trypsin. The residue Arg53, which participates in a complex network of hydrogen bonds formed between the core and the binding loop of eglin c, was replaced with the shorter basic amino acid lysine in the mutant Lys53-eglin. Two hydrogen bonds with Thr44, located in the binding loop, can no longer be formed but are partially restored by a water molecule bound in the vicinity of Lys53. Eglin c in complexes with both subtilisin Novo and subtilisin Carlsberg was crystallized in two different space groups. Comparison of the complexes showed a rigid body rotation for the eglin c core of 11.5 degrees with respect to the enzyme, probably caused by different intermolecular contacts in both crystal forms.
About this Structure
1SBN is a Protein complex structure of sequences from Bacillus subtilis and Hirudo medicinalis. Full crystallographic information is available from OCA.
Reference
Refined crystal structures of subtilisin novo in complex with wild-type and two mutant eglins. Comparison with other serine proteinase inhibitor complexes., Heinz DW, Priestle JP, Rahuel J, Wilson KS, Grutter MG, J Mol Biol. 1991 Jan 20;217(2):353-71. PMID:1992167
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