1jnt
From Proteopedia
(New page: 200px<br /><applet load="1jnt" size="450" color="white" frame="true" align="right" spinBox="true" caption="1jnt" /> '''NMR Structure of the E. coli Peptidyl-Prolyl...) |
|||
| Line 1: | Line 1: | ||
| - | [[Image:1jnt.jpg|left|200px]]<br /><applet load="1jnt" size=" | + | [[Image:1jnt.jpg|left|200px]]<br /><applet load="1jnt" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1jnt" /> | caption="1jnt" /> | ||
'''NMR Structure of the E. coli Peptidyl-Prolyl cis/trans-Isomerase Parvulin 10'''<br /> | '''NMR Structure of the E. coli Peptidyl-Prolyl cis/trans-Isomerase Parvulin 10'''<br /> | ||
==Overview== | ==Overview== | ||
| - | E. coli Par10 is a peptidyl-prolyl cis/trans isomerase (PPIase) from | + | E. coli Par10 is a peptidyl-prolyl cis/trans isomerase (PPIase) from Escherichia coli catalyzing the isomerization of Xaa-Pro bonds in oligopeptides with a broad substrate specificity. The structure of E. coli Par10 has been determined by multidimensional solution-state NMR spectroscopy based on 1207 conformational constraints (1067 NOE-derived distances, 42 vicinal coupling-constant restraints, 30 hydrogen-bond restraints, and 68 phi/psi restraints derived from the Chemical Shift Index). Simulated-annealing calculations with the program ARIA and subsequent refinement with XPLOR yielded a set of 18 convergent structures with an average backbone RMSD from mean atomic coordinates of 0.50 A within the well-defined secondary structure elements. E. coli Par10 is the smallest known PPIase so far, with a high catalytic efficiency comparable to that of FKBPs and cyclophilins. The secondary structure of E. coli Par10 consists of four helical regions and a four-stranded antiparallel beta-sheet. The N terminus forms a beta-strand, followed by a large stretch comprising three alpha-helices. A loop region containing a short beta-strand separates these helices from a fourth alpha-helix. The C terminus consists of two more beta-strands completing the four-stranded anti-parallel beta-sheet with strand order 2143. Interestingly, the third beta-strand includes a Gly-Pro cis peptide bond. The curved beta-strand forms a hydrophobic binding pocket together with alpha-helix 4, which also contains a number of highly conserved residues. The three-dimensional structure of Par10 closely resembles that of the human proteins hPin1 and hPar14 and the plant protein Pin1At, belonging to the same family of highly homologous proteins. |
==About this Structure== | ==About this Structure== | ||
| - | 1JNT is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Active as [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] Full crystallographic information is available from [http:// | + | 1JNT is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Active as [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] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JNT OCA]. |
==Reference== | ==Reference== | ||
| Line 18: | Line 18: | ||
[[Category: Kessler, H.]] | [[Category: Kessler, H.]] | ||
[[Category: Kuehlewein, A.]] | [[Category: Kuehlewein, A.]] | ||
| - | [[Category: Rahfeld, J | + | [[Category: Rahfeld, J U.]] |
[[Category: Schelbert, B.]] | [[Category: Schelbert, B.]] | ||
[[Category: Voll, G.]] | [[Category: Voll, G.]] | ||
| Line 24: | Line 24: | ||
[[Category: cis peptide bond]] | [[Category: cis peptide bond]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:24:39 2008'' |
Revision as of 11:24, 21 February 2008
|
NMR Structure of the E. coli Peptidyl-Prolyl cis/trans-Isomerase Parvulin 10
Overview
E. coli Par10 is a peptidyl-prolyl cis/trans isomerase (PPIase) from Escherichia coli catalyzing the isomerization of Xaa-Pro bonds in oligopeptides with a broad substrate specificity. The structure of E. coli Par10 has been determined by multidimensional solution-state NMR spectroscopy based on 1207 conformational constraints (1067 NOE-derived distances, 42 vicinal coupling-constant restraints, 30 hydrogen-bond restraints, and 68 phi/psi restraints derived from the Chemical Shift Index). Simulated-annealing calculations with the program ARIA and subsequent refinement with XPLOR yielded a set of 18 convergent structures with an average backbone RMSD from mean atomic coordinates of 0.50 A within the well-defined secondary structure elements. E. coli Par10 is the smallest known PPIase so far, with a high catalytic efficiency comparable to that of FKBPs and cyclophilins. The secondary structure of E. coli Par10 consists of four helical regions and a four-stranded antiparallel beta-sheet. The N terminus forms a beta-strand, followed by a large stretch comprising three alpha-helices. A loop region containing a short beta-strand separates these helices from a fourth alpha-helix. The C terminus consists of two more beta-strands completing the four-stranded anti-parallel beta-sheet with strand order 2143. Interestingly, the third beta-strand includes a Gly-Pro cis peptide bond. The curved beta-strand forms a hydrophobic binding pocket together with alpha-helix 4, which also contains a number of highly conserved residues. The three-dimensional structure of Par10 closely resembles that of the human proteins hPin1 and hPar14 and the plant protein Pin1At, belonging to the same family of highly homologous proteins.
About this Structure
1JNT is a Single protein structure of sequence from Escherichia coli. Active as Peptidylprolyl isomerase, with EC number 5.2.1.8 Full crystallographic information is available from OCA.
Reference
Solution structure of Escherichia coli Par10: The prototypic member of the Parvulin family of peptidyl-prolyl cis/trans isomerases., Kuhlewein A, Voll G, Hernandez Alvarez B, Kessler H, Fischer G, Rahfeld JU, Gemmecker G, Protein Sci. 2004 Sep;13(9):2378-87. PMID:15322281
Page seeded by OCA on Thu Feb 21 13:24:39 2008
