1xu7: Difference between revisions
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|PDB= 1xu7 |SIZE=350|CAPTION= <scene name='initialview01'>1xu7</scene>, resolution 1.80Å | |PDB= 1xu7 |SIZE=350|CAPTION= <scene name='initialview01'>1xu7</scene>, resolution 1.80Å | ||
|SITE= | |SITE= | ||
|LIGAND= <scene name='pdbligand= | |LIGAND= <scene name='pdbligand=CPS:3-[(3-CHOLAMIDOPROPYL)DIMETHYLAMMONIO]-1-PROPANESULFONATE'>CPS</scene>, <scene name='pdbligand=NDP:NADPH+DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NDP</scene> | ||
|ACTIVITY= [http://en.wikipedia.org/wiki/11-beta-hydroxysteroid_dehydrogenase 11-beta-hydroxysteroid dehydrogenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.146 1.1.1.146] | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/11-beta-hydroxysteroid_dehydrogenase 11-beta-hydroxysteroid dehydrogenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.146 1.1.1.146] </span> | ||
|GENE= HSD11B1, HSD11, HSD11L ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | |GENE= HSD11B1, HSD11, HSD11L ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | ||
|DOMAIN= | |||
|RELATEDENTRY=[[1xu9|1XU9]] | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1xu7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xu7 OCA], [http://www.ebi.ac.uk/pdbsum/1xu7 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1xu7 RCSB]</span> | |||
}} | }} | ||
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==Overview== | ==Overview== | ||
Human 11beta-hydroxysteroid dehydrogenase type I (11beta-HSD1) is an ER-localized membrane protein that catalyzes the interconversion of cortisone and cortisol. In adipose tissue, excessive cortisol production through 11beta-HSD1 activity has been implicated in the pathogenesis of type II diabetes and obesity. We report here biophysical, kinetic, mutagenesis, and structural data on two ternary complexes of 11beta-HSD1. The combined results reveal flexible active site interactions relevant to glucocorticoid recognition and demonstrate how four 11beta-HSD1 C termini converge to form an as yet uncharacterized tetramerization motif. A C-terminal Pro-Cys motif is localized at the center of the tetramer and forms reversible enzyme disulfides that alter enzyme activity. Conformational flexibility at the tetramerization interface is coupled to structural changes at the enzyme active site suggesting how the central Pro-Cys motif may regulate enzyme activity. Together, the crystallographic and biophysical data provide a structural framework for understanding 11beta-HSD1 activities and will ultimately facilitate the development of specific inhibitors. | Human 11beta-hydroxysteroid dehydrogenase type I (11beta-HSD1) is an ER-localized membrane protein that catalyzes the interconversion of cortisone and cortisol. In adipose tissue, excessive cortisol production through 11beta-HSD1 activity has been implicated in the pathogenesis of type II diabetes and obesity. We report here biophysical, kinetic, mutagenesis, and structural data on two ternary complexes of 11beta-HSD1. The combined results reveal flexible active site interactions relevant to glucocorticoid recognition and demonstrate how four 11beta-HSD1 C termini converge to form an as yet uncharacterized tetramerization motif. A C-terminal Pro-Cys motif is localized at the center of the tetramer and forms reversible enzyme disulfides that alter enzyme activity. Conformational flexibility at the tetramerization interface is coupled to structural changes at the enzyme active site suggesting how the central Pro-Cys motif may regulate enzyme activity. Together, the crystallographic and biophysical data provide a structural framework for understanding 11beta-HSD1 activities and will ultimately facilitate the development of specific inhibitors. | ||
==About this Structure== | ==About this Structure== | ||
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[[Category: Snell, G P.]] | [[Category: Snell, G P.]] | ||
[[Category: Wu, Y.]] | [[Category: Wu, Y.]] | ||
[[Category: 11b-hsd1]] | [[Category: 11b-hsd1]] | ||
[[Category: dehydrogenase]] | [[Category: dehydrogenase]] | ||
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[[Category: sdr]] | [[Category: sdr]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:54:44 2008'' | ||
