Structural highlights
Function
[FEOB_ECOLI] GTP-driven Fe(2+) uptake system.[1] [2]
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
G proteins are key molecular switches in the regulation of membrane protein function and signal transduction. The prokaryotic membrane protein FeoB is involved in G protein coupled Fe(2+) transport, and is unique in that the G protein is directly tethered to the membrane domain. Here, we report the structure of the soluble domain of FeoB, including the G protein domain, and its assembly into an unexpected trimer. Comparisons between nucleotide free and liganded structures reveal the closed and open state of a central cytoplasmic pore, respectively. In addition, these data provide the first observation of a conformational switch in the nucleotide-binding G5 motif, defining the structural basis for GDP release. From these results, structural parallels are drawn to eukaryotic G protein coupled membrane processes.
Structural basis of GDP release and gating in G protein coupled Fe2+ transport.,Guilfoyle A, Maher MJ, Rapp M, Clarke R, Harrop S, Jormakka M EMBO J. 2009 Sep 2;28(17):2677-85. Epub 2009 Jul 23. PMID:19629046[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Kammler M, Schon C, Hantke K. Characterization of the ferrous iron uptake system of Escherichia coli. J Bacteriol. 1993 Oct;175(19):6212-9. PMID:8407793
- ↑ Marlovits TC, Haase W, Herrmann C, Aller SG, Unger VM. The membrane protein FeoB contains an intramolecular G protein essential for Fe(II) uptake in bacteria. Proc Natl Acad Sci U S A. 2002 Dec 10;99(25):16243-8. Epub 2002 Nov 22. PMID:12446835 doi:10.1073/pnas.242338299
- ↑ Guilfoyle A, Maher MJ, Rapp M, Clarke R, Harrop S, Jormakka M. Structural basis of GDP release and gating in G protein coupled Fe2+ transport. EMBO J. 2009 Sep 2;28(17):2677-85. Epub 2009 Jul 23. PMID:19629046 doi:10.1038/emboj.2009.208
