1dr8
From Proteopedia
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|SITE= | |SITE= | ||
|LIGAND= | |LIGAND= | ||
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/3-isopropylmalate_dehydrogenase 3-isopropylmalate dehydrogenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.85 1.1.1.85] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/3-isopropylmalate_dehydrogenase 3-isopropylmalate dehydrogenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.85 1.1.1.85] </span> |
|GENE= LEUB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=274 Thermus thermophilus]) | |GENE= LEUB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=274 Thermus thermophilus]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1osj|1OSJ]], [[1dpz|1DPZ]], [[1dr0|1DR0]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1dr8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dr8 OCA], [http://www.ebi.ac.uk/pdbsum/1dr8 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1dr8 RCSB]</span> | ||
}} | }} | ||
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[[Category: paperclip motion]] | [[Category: paperclip motion]] | ||
| - | ''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 19:47:09 2008'' |
Revision as of 16:47, 30 March 2008
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| , resolution 2.70Å | |||||||
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| Gene: | LEUB (Thermus thermophilus) | ||||||
| Activity: | 3-isopropylmalate dehydrogenase, with EC number 1.1.1.85 | ||||||
| Related: | 1OSJ, 1DPZ, 1DR0
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
STRUCTURE OF MODIFIED 3-ISOPROPYLMALATE DEHYDROGENASE AT THE C-TERMINUS, HD177
Overview
Thermal stability of the Thermus thermophilus isopropylmalate dehydrogenase enzyme was substantially lost upon the deletion of three residues from the C-terminus. However, the stability was partly recovered by the addition of two, four and seven amino acid residues (called HD177, HD708 and HD711, respectively) to the C-terminal region of the truncated enzyme. Three structures of these mutant enzymes were determined by an X-ray diffraction method. All protein crystals belong to space group P2(1) and their structures were solved by a standard molecular replacement method where the original dimer structure of the A172L mutant was used as a search model. Thermal stability of these mutant enzymes is discussed based on the 3D structure with special attention to the width of the active-site groove and the minor groove, distortion of beta-sheet pillar structure and size of cavity in the domain-domain interface around the C-terminus. Our previous studies revealed that the thermal stability of isopropylmalate dehydrogenase increases when the active-site cleft is closed (the closed form). In the present study it is shown that the active-site cleft can be regulated by open-close movement of the minor groove located at the opposite side to the active-site groove on the same subunit, through a paperclip-like motion.
About this Structure
1DR8 is a Single protein structure of sequence from Thermus thermophilus. Full crystallographic information is available from OCA.
Reference
Crystal structures of 3-isopropylmalate dehydrogenases with mutations at the C-terminus: crystallographic analyses of structure-stability relationships., Nurachman Z, Akanuma S, Sato T, Oshima T, Tanaka N, Protein Eng. 2000 Apr;13(4):253-8. PMID:10810156
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