ABCC8 p.Tyr195Glu
| Predicted by SNAP2: | A: D (66%), C: D (66%), D: D (85%), E: D (85%), F: N (78%), G: D (80%), H: D (75%), I: N (53%), K: D (85%), L: N (53%), M: N (57%), N: D (80%), P: D (66%), Q: D (80%), R: D (85%), S: D (75%), T: D (75%), V: N (53%), W: D (63%), |
| Predicted by PROVEAN: | A: D, C: D, D: D, E: D, F: N, G: D, H: N, I: D, K: D, L: D, M: D, N: D, P: D, Q: D, R: D, S: D, T: D, V: D, W: N, |
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[hide] Review. SUR1: a unique ATP-binding cassette protei... Philos Trans R Soc Lond B Biol Sci. 2009 Jan 27;364(1514):257-67. Aittoniemi J, Fotinou C, Craig TJ, de Wet H, Proks P, Ashcroft FM
Review. SUR1: a unique ATP-binding cassette protein that functions as an ion channel regulator.
Philos Trans R Soc Lond B Biol Sci. 2009 Jan 27;364(1514):257-67., [PMID:18990670]
Abstract [show]
SUR1 is an ATP-binding cassette (ABC) transporter with a novel function. In contrast to other ABC proteins, it serves as the regulatory subunit of an ion channel. The ATP-sensitive (KATP) channel is an octameric complex of four pore-forming Kir6.2 subunits and four regulatory SUR1 subunits, and it links cell metabolism to electrical activity in many cell types. ATPase activity at the nucleotide-binding domains of SUR results in an increase in KATP channel open probability. Conversely, ATP binding to Kir6.2 closes the channel. Metabolic regulation is achieved by the balance between these two opposing effects. Precisely how SUR1 talks to Kir6.2 remains unclear, but recent studies have identified some residues and domains that are involved in both physical and functional interactions between the two proteins. The importance of these interactions is exemplified by the fact that impaired regulation of Kir6.2 by SUR1 results in human disease, with loss-of-function SUR1 mutations causing congenital hyperinsulinism and gain-of-function SUR1 mutations leading to neonatal diabetes. This paper reviews recent data on the regulation of Kir6.2 by SUR1 and considers the molecular mechanisms by which SUR1 mutations produce disease.
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No. Sentence Comment
98 Co-immunoprecipitation (but not necessarily surface trafficking) is abolished by mutation of F132L in CL2 (Proks et al. 2006a) and of Y195E at the start of CL3 (figure 2).
X
ABCC8 p.Tyr195Glu 18990670:98:134
status: NEW123 0 20 40 60 80 100 TMD0 + 6.2∆C TMD0 Y195E + 6.2∆C binding(%WT) Figure 2.
X
ABCC8 p.Tyr195Glu 18990670:123:42
status: NEW124 Binding of TMD0 to Kir6.2DC-effect of the Y195E mutation.
X
ABCC8 p.Tyr195Glu 18990670:124:42
status: NEW97 Co-immunoprecipitation (but not necessarily surface trafficking) is abolished by mutation of F132L in CL2 (Proks et al. 2006a) and of Y195E at the start of CL3 (figure 2).
X
ABCC8 p.Tyr195Glu 18990670:97:134
status: NEW122 0 20 40 60 80 100 TMD0 + 6.2࢞C TMD0 Y195E + 6.2࢞C binding (% WT) Figure 2.
X
ABCC8 p.Tyr195Glu 18990670:122:42
status: NEW