Structural highlights
1tvm is a 1 chain structure with sequence from Escherichia coli. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
|
| Gene: | GATB, C2618, Z3256, ECS2896, SF2155, S2281 (Escherichia coli) |
| Activity: | Protein-N(pi)-phosphohistidine--sugar phosphotransferase, with EC number 2.7.1.69 |
| Resources: | FirstGlance, OCA, RCSB, PDBsum, TOPSAN |
Function
[PTKB_ECOL6] The phosphoenolpyruvate-dependent sugar phosphotransferase system (PTS), a major carbohydrate active -transport system, catalyzes the phosphorylation of incoming sugar substrates concomitant with their translocation across the cell membrane. This system is involved in galactitol transport (By similarity).
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The phosphoenolpyruvate-dependent carbohydrate transport system (PTS) couples uptake with phosphorylation of a variety of carbohydrates in prokaryotes. In this multienzyme complex, the enzyme II (EII), a carbohydrate-specific permease, is constituted of two cytoplasmic domains, IIA and IIB, and a transmembrane channel IIC domain. Among the five families of EIIs identified in Escherichia coli, the galactitol-specific transporter (II(gat)) belongs to the glucitol family and is structurally the least well-characterized. Here, we used nuclear magnetic resonance (NMR) spectroscopy to solve the three-dimensional structure of the IIB subunit (GatB). GatB consists of a central four-stranded parallel beta-sheet flanked by alpha-helices on both sides; the active site cysteine of GatB is located at the beginning of an unstructured loop between beta1 and alpha1 that folds into a P-loop-like structure. This structural arrangement shows similarities with other IIB subunits but also with mammalian low molecular weight protein tyrosine phosphatases (LMW PTPase) and arsenate reductase (ArsC). An NMR titration was performed to identify the GatA-interacting residues.
NMR structure of the enzyme GatB of the galactitol-specific phosphoenolpyruvate-dependent phosphotransferase system and its interaction with GatA.,Volpon L, Young CR, Matte A, Gehring K Protein Sci. 2006 Oct;15(10):2435-41. Epub 2006 Sep 8. PMID:16963640[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Volpon L, Young CR, Matte A, Gehring K. NMR structure of the enzyme GatB of the galactitol-specific phosphoenolpyruvate-dependent phosphotransferase system and its interaction with GatA. Protein Sci. 2006 Oct;15(10):2435-41. Epub 2006 Sep 8. PMID:16963640 doi:10.1110/ps.062337406
