motifs/domains
| N-terminal transmembrane domain of ABCC8 (TMD0) interacts with KCNJ11 |
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two nucleotide binding folds |
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an endoplasmic retention signal |
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in addition at C terminal an anterograde signal composed in part of a dileucine motif and downstream phenylalanine |
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an extracellular N terminal |
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three asymetric membrane spanning domains (five, six and six helices) |
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two nucleotide binding sites between TM2 and TM3 |
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C terminal to TM3 and in addition required for KATP channels to exit the ER/cis-Golgi compartments and transit to the cell surface |
basic FUNCTION
| ABC transporter, traffic ATPase, regulator of AFFP-sensitive K+ channels(Katp) and insulin release |
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activating Katp by nucleotide binding or hydrolysis on ABCC8, which opens the channel |
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following stroke, brain, or spinal cord injury, ABCC8 is increased in neurovascular cells at the site of injury |
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ABCC8 and TRPM4 have an intrinsic capacity for stable co-association |
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exposure of ABCC8-TRPM4 channels to Mg2+ greatly amplified the effect of a subsequent decrease in the intracellular ATP concentration |