1j0a: Difference between revisions
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|PDB= 1j0a |SIZE=350|CAPTION= <scene name='initialview01'>1j0a</scene>, resolution 2.5Å | |PDB= 1j0a |SIZE=350|CAPTION= <scene name='initialview01'>1j0a</scene>, resolution 2.5Å | ||
|SITE= | |SITE= | ||
|LIGAND= <scene name='pdbligand= | |LIGAND= <scene name='pdbligand=IPA:ISOPROPYL+ALCOHOL'>IPA</scene>, <scene name='pdbligand=PLP:PYRIDOXAL-5'-PHOSPHATE'>PLP</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene> | ||
|ACTIVITY= [http://en.wikipedia.org/wiki/1-aminocyclopropane-1-carboxylate_deaminase 1-aminocyclopropane-1-carboxylate deaminase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.5.99.7 3.5.99.7] | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/1-aminocyclopropane-1-carboxylate_deaminase 1-aminocyclopropane-1-carboxylate deaminase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.5.99.7 3.5.99.7] </span> | ||
|GENE= | |GENE= | ||
|DOMAIN= | |||
|RELATEDENTRY=[[1f2d|1F2D]], [[1j0b|1J0B]], [[1j0c|1J0C]], [[1j0d|1J0D]], [[1j0e|1J0E]] | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1j0a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1j0a OCA], [http://www.ebi.ac.uk/pdbsum/1j0a PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1j0a RCSB]</span> | |||
}} | }} | ||
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[[Category: Tanaka, I.]] | [[Category: Tanaka, I.]] | ||
[[Category: Yao, M.]] | [[Category: Yao, M.]] | ||
[[Category: plp dependent]] | [[Category: plp dependent]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 21:27:10 2008'' | ||
Revision as of 21:27, 30 March 2008
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| , resolution 2.5Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , | ||||||
| Activity: | 1-aminocyclopropane-1-carboxylate deaminase, with EC number 3.5.99.7 | ||||||
| Related: | 1F2D, 1J0B, 1J0C, 1J0D, 1J0E
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal Structure Analysis of the ACC deaminase homologue
OverviewOverview
1-Aminocyclopropane-l-carboxylate deaminase (ACCD) is a pyridoxal 5/-phosphate dependent enzyme that shows deaminase activity toward ACC, a precursor of plant hormone ethylene. ACCD from some soil bacteria has been reported to be able to break the cyclopropane ring of ACC to yield a-ketobutyrate and ammonia. We reported the crystal structure of ACCD from the yeast Hansenula saturnus in the absence/presence of substrate ACC, and proposed its ingenious reaction mechanisms. In order to study the enzyme further, we overexpressed the ACCD homologue protein (phAHP) from the fully decoded hyperthermophilic archearon, Pyrococcus horikoshii OT3. However, phAHP does not show ACCD activity at high temperature as well as at room temperature, though it has significant sequence similarity. Instead of ACCD activity, the GC-MS analysis and enzymatic method show that phAHP has deaminase activity toward L and D-serine. Here, we present the crystal structures of the native and ACC-complexed phAHP. The overall topology of the phAHP structure is very similar to that of ACCD; however, critical differences were observed around the active site. Here, the differences of enzymatic activity between phAHP and ACCD are discussed based on the structural differences of these two proteins. We suggest that the catalytic disagreement between these two enzymes comes from the difference of the residues near the pyridine ring of pyridoxal 5'-phosphate (PLP), not the difference of the catalytic residues themselves. We also propose a condition necessary in the primary sequence to have ACCD activity.
About this StructureAbout this Structure
1J0A is a Single protein structure of sequence from Pyrococcus horikoshii. Full crystallographic information is available from OCA.
ReferenceReference
Structural and enzymatic properties of 1-aminocyclopropane-1-carboxylate deaminase homologue from Pyrococcus horikoshii., Fujino A, Ose T, Yao M, Tokiwano T, Honma M, Watanabe N, Tanaka I, J Mol Biol. 2004 Aug 20;341(4):999-1013. PMID:15328614
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