1fxj
From Proteopedia
(New page: 200px<br /><applet load="1fxj" size="450" color="white" frame="true" align="right" spinBox="true" caption="1fxj, resolution 2.25Å" /> '''CRYSTAL STRUCTURE OF...) |
|||
| Line 1: | Line 1: | ||
| - | [[Image:1fxj.jpg|left|200px]]<br /><applet load="1fxj" size=" | + | [[Image:1fxj.jpg|left|200px]]<br /><applet load="1fxj" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1fxj, resolution 2.25Å" /> | caption="1fxj, resolution 2.25Å" /> | ||
'''CRYSTAL STRUCTURE OF N-ACETYLGLUCOSAMINE 1-PHOSPHATE URIDYLTRANSFERASE'''<br /> | '''CRYSTAL STRUCTURE OF N-ACETYLGLUCOSAMINE 1-PHOSPHATE URIDYLTRANSFERASE'''<br /> | ||
==Overview== | ==Overview== | ||
| - | N-acetylglucosamine 1-phosphate uridyltransferase (GlmU) is a cytoplasmic | + | N-acetylglucosamine 1-phosphate uridyltransferase (GlmU) is a cytoplasmic bifunctional enzyme involved in the biosynthesis of the nucleotide-activated UDP-GlcNAc, which is an essential precursor for the biosynthetic pathways of peptidoglycan and other components in bacteria. The crystal structure of a truncated form of GlmU has been solved at 2.25 A resolution using the multiwavelength anomalous dispersion technique and its function tested with mutagenesis studies. The molecule is composed of two distinct domains connected by a long alpha-helical arm: (i) an N-terminal domain which resembles the dinucleotide-binding Rossmann fold; and (ii) a C-terminal domain which adopts a left-handed parallel beta-helix structure (LbetaH) as found in homologous bacterial acetyltransferases. Three GlmU molecules assemble into a trimeric arrangement with tightly packed parallel LbetaH domains, the long alpha-helical linkers being seated on top of the arrangement and the N-terminal domains projected away from the 3-fold axis. In addition, the 2.3 A resolution structure of the GlmU-UDP-GlcNAc complex reveals the structural bases required for the uridyltransferase activity. These structures exemplify a three-dimensional template for the development of new antibacterial agents and for studying other members of the large family of XDP-sugar bacterial pyrophosphorylases. |
==About this Structure== | ==About this Structure== | ||
| - | 1FXJ is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with SO4 and MES as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/UDP-N-acetylglucosamine_diphosphorylase UDP-N-acetylglucosamine diphosphorylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.23 2.7.7.23] Full crystallographic information is available from [http:// | + | 1FXJ is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with <scene name='pdbligand=SO4:'>SO4</scene> and <scene name='pdbligand=MES:'>MES</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/UDP-N-acetylglucosamine_diphosphorylase UDP-N-acetylglucosamine diphosphorylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.23 2.7.7.23] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FXJ OCA]. |
==Reference== | ==Reference== | ||
| Line 28: | Line 28: | ||
[[Category: pyrophosphorylase]] | [[Category: pyrophosphorylase]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:43:42 2008'' |
Revision as of 10:43, 21 February 2008
|
CRYSTAL STRUCTURE OF N-ACETYLGLUCOSAMINE 1-PHOSPHATE URIDYLTRANSFERASE
Overview
N-acetylglucosamine 1-phosphate uridyltransferase (GlmU) is a cytoplasmic bifunctional enzyme involved in the biosynthesis of the nucleotide-activated UDP-GlcNAc, which is an essential precursor for the biosynthetic pathways of peptidoglycan and other components in bacteria. The crystal structure of a truncated form of GlmU has been solved at 2.25 A resolution using the multiwavelength anomalous dispersion technique and its function tested with mutagenesis studies. The molecule is composed of two distinct domains connected by a long alpha-helical arm: (i) an N-terminal domain which resembles the dinucleotide-binding Rossmann fold; and (ii) a C-terminal domain which adopts a left-handed parallel beta-helix structure (LbetaH) as found in homologous bacterial acetyltransferases. Three GlmU molecules assemble into a trimeric arrangement with tightly packed parallel LbetaH domains, the long alpha-helical linkers being seated on top of the arrangement and the N-terminal domains projected away from the 3-fold axis. In addition, the 2.3 A resolution structure of the GlmU-UDP-GlcNAc complex reveals the structural bases required for the uridyltransferase activity. These structures exemplify a three-dimensional template for the development of new antibacterial agents and for studying other members of the large family of XDP-sugar bacterial pyrophosphorylases.
About this Structure
1FXJ is a Single protein structure of sequence from Escherichia coli with and as ligands. Active as UDP-N-acetylglucosamine diphosphorylase, with EC number 2.7.7.23 Full crystallographic information is available from OCA.
Reference
Crystal structure of the bifunctional N-acetylglucosamine 1-phosphate uridyltransferase from Escherichia coli: a paradigm for the related pyrophosphorylase superfamily., Brown K, Pompeo F, Dixon S, Mengin-Lecreulx D, Cambillau C, Bourne Y, EMBO J. 1999 Aug 2;18(15):4096-107. PMID:10428949
Page seeded by OCA on Thu Feb 21 12:43:42 2008
