5DJS

Thermobaculum terrenum O-GlcNAc transferase mutant - K341M

DOI: 10.2210/pdb5DJS/pdb

Classification: TRANSFERASE
Organism(s): Thermobaculum terrenum
Expression System: Escherichia coli BL21(DE3)
Mutation(s): Yes

Deposited: 2015-09-02 Released: 2015-10-28
Deposition Author(s): Ostrowski, A., Gundogdu, M., Ferenbach, A.T., Lebedev, A., van Aalten, D.M.F.
Funding Organization(s): Wellcome Trust

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.80 Å
R-Value Free: 0.246
R-Value Work: 0.218
R-Value Observed: 0.219

wwPDB Validation 3D Report Full Report

This is version 1.3 of the entry. See complete history.

Literature

Evidence for a Functional O-Linked N-Acetylglucosamine (O-GlcNAc) System in the Thermophilic Bacterium Thermobaculum terrenum.

Ostrowski, A., Gundogdu, M., Ferenbach, A.T., Lebedev, A.A., van Aalten, D.M.

(2015) J Biol Chem 290: 30291-30305

PubMed: 26491011 Search on PubMedSearch on PubMed Central
DOI: 10.1074/jbc.M115.689596
Primary Citation of Related Structures:
5DIY, 5DJS

PubMed Abstract:

Post-translational modification of proteins is a ubiquitous mechanism of signal transduction in all kingdoms of life. One such modification is addition of O-linked N-acetylglucosamine to serine or threonine residues, known as O-GlcNAcylation. This unusual type of glycosylation is thought to be restricted to nucleocytoplasmic proteins of eukaryotes and is mediated by a pair of O-GlcNAc-transferase and O-GlcNAc hydrolase enzymes operating on a large number of substrate proteins. Protein O-GlcNAcylation is responsive to glucose and flux through the hexosamine biosynthetic pathway. Thus, a close relationship is thought to exist between the level of O-GlcNAc proteins within and the general metabolic state of the cell. Although isolated apparent orthologues of these enzymes are present in bacterial genomes, their biological functions remain largely unexplored. It is possible that understanding the function of these proteins will allow development of reductionist models to uncover the principles of O-GlcNAc signaling. Here, we identify orthologues of both O-GlcNAc cycling enzymes in the genome of the thermophilic eubacterium Thermobaculum terrenum. The O-GlcNAcase and O-GlcNAc-transferase are co-expressed and, like their mammalian orthologues, localize to the cytoplasm. The O-GlcNAcase orthologue possesses activity against O-GlcNAc proteins and model substrates. We describe crystal structures of both enzymes, including an O-GlcNAcase·peptide complex, showing conservation of active sites with the human orthologues. Although in vitro activity of the O-GlcNAc-transferase could not be detected, treatment of T. terrenum with an O-GlcNAc-transferase inhibitor led to inhibition of growth. T. terrenum may be the first example of a bacterium possessing a functional O-GlcNAc system.

Organizational Affiliation:

From the Division of Molecular Microbiology and Medical Research Council Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dow Street, DD1 5EH Dundee, Scotland, United Kingdom and d.m.f.vanaalten@dundee.ac.uk.

Macromolecules

Find similar proteins by:

(by identity cutoff) | Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tetratricopeptide TPR_2 repeat protein	A, B, C, D	529	Thermobaculum terrenum	Mutation(s): 1 Gene Names: Tter_2822
Find proteins for D1CIY5 (Thermobaculum terrenum (strain ATCC BAA-798 / YNP1)) Explore D1CIY5 Go to UniProtKB: D1CIY5
Protein Feature View Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
UDP Query on UDP Download Ideal Coordinates CCD File SDF format, chain E [A] SDF format, chain F [B] SDF format, chain G [C] SDF format, chain H [D] MOL2 format, chain E [A] MOL2 format, chain F [B] MOL2 format, chain G [C] MOL2 format, chain H [D]	A, B, C, D	URIDINE-5'-DIPHOSPHATE C₉ H₁₄ N₂ O₁₂ P₂ XCCTYIAWTASOJW-XVFCMESISA-N		Ligand Interaction