1q6h: Difference between revisions
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'''Crystal structure of a truncated form of FkpA from Escherichia coli''' | {{Structure | ||
|PDB= 1q6h |SIZE=350|CAPTION= <scene name='initialview01'>1q6h</scene>, resolution 1.97Å | |||
|SITE= | |||
|LIGAND= | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Peptidylprolyl_isomerase Peptidylprolyl isomerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.2.1.8 5.2.1.8] | |||
|GENE= FKPA OR B3347 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli]) | |||
}} | |||
'''Crystal structure of a truncated form of FkpA from Escherichia coli''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1Q6H is a [ | 1Q6H is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q6H OCA]. | ||
==Reference== | ==Reference== | ||
Structural and functional studies of FkpA from Escherichia coli, a cis/trans peptidyl-prolyl isomerase with chaperone activity., Saul FA, Arie JP, Vulliez-le Normand B, Kahn R, Betton JM, Bentley GA, J Mol Biol. 2004 Jan 9;335(2):595-608. PMID:[http:// | Structural and functional studies of FkpA from Escherichia coli, a cis/trans peptidyl-prolyl isomerase with chaperone activity., Saul FA, Arie JP, Vulliez-le Normand B, Kahn R, Betton JM, Bentley GA, J Mol Biol. 2004 Jan 9;335(2):595-608. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/14672666 14672666] | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
[[Category: Peptidylprolyl isomerase]] | [[Category: Peptidylprolyl isomerase]] | ||
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[[Category: periplasm]] | [[Category: periplasm]] | ||
''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 13:33:37 2008'' | ||
Revision as of 14:33, 20 March 2008
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| , resolution 1.97Å | |||||||
|---|---|---|---|---|---|---|---|
| Gene: | FKPA OR B3347 (Escherichia coli) | ||||||
| Activity: | Peptidylprolyl isomerase, with EC number 5.2.1.8 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of a truncated form of FkpA from Escherichia coli
OverviewOverview
The protein FkpA from the periplasm of Escherichia coli exhibits both cis/trans peptidyl-prolyl isomerase (PPIase) and chaperone activities. The crystal structure of the protein has been determined in three different forms: as the full-length native molecule, as a truncated form lacking the last 21 residues, and as the same truncated form in complex with the immunosuppressant ligand, FK506. FkpA is a dimeric molecule in which the 245-residue subunit is divided into two domains. The N-terminal domain includes three helices that are interlaced with those of the other subunit to provide all inter-subunit contacts maintaining the dimeric species. The C-terminal domain, which belongs to the FK506-binding protein (FKBP) family, binds the FK506 ligand. The overall form of the dimer is V-shaped, and the different crystal structures reveal a flexibility in the relative orientation of the two C-terminal domains located at the extremities of the V. The deletion mutant FkpNL, comprising the N-terminal domain only, exists in solution as a mixture of monomeric and dimeric species, and exhibits chaperone activity. By contrast, a deletion mutant comprising the C-terminal domain only is monomeric, and although it shows PPIase activity, it is devoid of chaperone function. These results suggest that the chaperone and catalytic activities reside in the N and C-terminal domains, respectively. Accordingly, the observed mobility of the C-terminal domains of the dimeric molecule could effectively adapt these two independent folding functions of FkpA to polypeptide substrates.
About this StructureAbout this Structure
1Q6H is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
ReferenceReference
Structural and functional studies of FkpA from Escherichia coli, a cis/trans peptidyl-prolyl isomerase with chaperone activity., Saul FA, Arie JP, Vulliez-le Normand B, Kahn R, Betton JM, Bentley GA, J Mol Biol. 2004 Jan 9;335(2):595-608. PMID:14672666
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