Structural highlights
Function
[VDAC1_HUMAN] Forms a channel through the mitochondrial outer membrane and also the plasma membrane. The channel at the outer mitochondrial membrane allows diffusion of small hydrophilic molecules; in the plasma membrane it is involved in cell volume regulation and apoptosis. It adopts an open conformation at low or zero membrane potential and a closed conformation at potentials above 30-40 mV. The open state has a weak anion selectivity whereas the closed state is cation-selective. May participate in the formation of the permeability transition pore complex (PTPC) responsible for the release of mitochondrial products that triggers apoptosis.[1] [2] [3]
Publication Abstract from PubMed
15 N spin-relaxation rates are demonstrated to provide critical information about the long-range structure and internal motions of membrane proteins. Combined with an improved calculation method, the relaxation-rate-derived structure of the 283-residue human voltage-dependent anion channel revealed an anisotropically shaped barrel with a rigidly attached N-terminal helix. Our study thus establishes an NMR spectroscopic approach to determine the structure and dynamics of mammalian membrane proteins at high accuracy and resolution.
High-Resolution NMR Determination of the Dynamic Structure of Membrane Proteins.,Jaremko M, Jaremko L, Villinger S, Schmidt CD, Griesinger C, Becker S, Zweckstetter M Angew Chem Int Ed Engl. 2016 Jul 27. doi: 10.1002/anie.201602639. PMID:27461260[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Thinnes FP, Walter G, Hellmann KP, Hellmann T, Merker R, Kiafard Z, Eben-Brunnen J, Schwarzer C, Gotz H, Hilschmann N. Gadolinium as an opener of the outwardly rectifying Cl(-) channel (ORCC). Is there relevance for cystic fibrosis therapy? Pflugers Arch. 2001;443 Suppl 1:S111-6. Epub 2001 Jul 7. PMID:11845315 doi:http://dx.doi.org/10.1007/s004240100656
- ↑ Verrier F, Mignotte B, Jan G, Brenner C. Study of PTPC composition during apoptosis for identification of viral protein target. Ann N Y Acad Sci. 2003 Dec;1010:126-42. PMID:15033708
- ↑ Hiller S, Garces RG, Malia TJ, Orekhov VY, Colombini M, Wagner G. Solution structure of the integral human membrane protein VDAC-1 in detergent micelles. Science. 2008 Aug 29;321(5893):1206-10. PMID:18755977 doi:321/5893/1206
- ↑ Jaremko M, Jaremko L, Villinger S, Schmidt CD, Griesinger C, Becker S, Zweckstetter M. High-Resolution NMR Determination of the Dynamic Structure of Membrane Proteins. Angew Chem Int Ed Engl. 2016 Jul 27. doi: 10.1002/anie.201602639. PMID:27461260 doi:http://dx.doi.org/10.1002/anie.201602639
