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10.3389/fphys.2018.00362 http://scihub22266oqcxt.onion/10.3389/fphys.2018.00362 29706896!5906587!29706896     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=29706896&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215       Front+Physiol 2018 ; 9 (?): 362 Nephropedia Template TP {{tp|p=29706896|t=2018. Modulation of Connexin-36 Gap Junction Channels by Intracellular pH and Magnesium Ions |pdf=|usr=}}{{29706896}} gab.com Text Modulation of Connexin-36 Gap Junction Channels by Intracellular pH and Magnesium Ions JO: Front Physiol http://www.kidney.de/pget.php?&tw=1&pmid=29706896 #FOAvip Connexin-36 (Cx36) protein forms gap junction (GJ) channels in pancreatic beta cells and is also the main Cx isoform forming electrical synapses in the adult mammalian brain. Cx36 GJs can be regulated by intracellular pH (pH(i)) and cytosolic magnesium ion concentration ([Mg(2+)](i)), which can vary significantly under various physiological and pathological conditions. However, the combined effect and relationship of these two factors over Cx36-dependent coupling have not been previously studied in detail. Our experimental results in HeLa cells expressing Cx36 show that changes in both pH(i) and [Mg(2+)](i) affect junctional conductance (g(j)) in an interdependent manner; in other words, intracellular acidification cause increase or decay in g(j) depending on whether [Mg(2+)](i) is high or low, respectively, and intracellular alkalization cause reduction in g(j) independently of [Mg(2+)](i). Our experimental and modelling data support the hypothesis that Cx36 GJ channels contain two separate gating mechanisms, and both are differentially sensitive to changes in pH(i) and [Mg(2+)](i). Using recombinant Cx36 we found that two glutamate residues in the N-terminus could be partly responsible for the observed interrelated effect of pH(i) and [Mg(2+)](i). Mutation of glutamate at position 8 attenuated the stimulatory effect of intracellular acidification at high [Mg(2+)](i), while mutation at position 12 and double mutation at both positions reversed stimulatory effect to inhibition. Moreover, Cx36(*)E8Q lost the initial increase of g(j) at low [Mg(2+)](i) and double mutation lost the sensitivity to high [Mg(2+)](i). These results suggest that E8 and E12 are involved in regulation of Cx36 GJ channels by Mg(2+) and H(+) ions. Twit Text FOAVip Modulation of Connexin-36 Gap Junction Channels by Intracellular pH and Magnesium Ions ????Front Physiol http://www.kidney.de/pget.php?&tw=1&pmid=29706896 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=29706896 #FOAvip English Wikipedia <ref>{{Cite pmid|29706896}}</ref> Modulation of Connexin-36 Gap Junction Channels by Intracellular pH and Magnesium Ions #MMPMID29706896 Rimkute L; Kraujalis T; Snipas M; Palacios-Prado N; Jotautis V; Skeberdis VA; Bukauskas FF Front Physiol 2018[]; 9 (?): 362 PMID29706896show ga Connexin-36 (Cx36) protein forms gap junction (GJ) channels in pancreatic beta cells and is also the main Cx isoform forming electrical synapses in the adult mammalian brain. Cx36 GJs can be regulated by intracellular pH (pH(i)) and cytosolic magnesium ion concentration ([Mg(2+)](i)), which can vary significantly under various physiological and pathological conditions. However, the combined effect and relationship of these two factors over Cx36-dependent coupling have not been previously studied in detail. Our experimental results in HeLa cells expressing Cx36 show that changes in both pH(i) and [Mg(2+)](i) affect junctional conductance (g(j)) in an interdependent manner; in other words, intracellular acidification cause increase or decay in g(j) depending on whether [Mg(2+)](i) is high or low, respectively, and intracellular alkalization cause reduction in g(j) independently of [Mg(2+)](i). Our experimental and modelling data support the hypothesis that Cx36 GJ channels contain two separate gating mechanisms, and both are differentially sensitive to changes in pH(i) and [Mg(2+)](i). Using recombinant Cx36 we found that two glutamate residues in the N-terminus could be partly responsible for the observed interrelated effect of pH(i) and [Mg(2+)](i). Mutation of glutamate at position 8 attenuated the stimulatory effect of intracellular acidification at high [Mg(2+)](i), while mutation at position 12 and double mutation at both positions reversed stimulatory effect to inhibition. Moreover, Cx36(*)E8Q lost the initial increase of g(j) at low [Mg(2+)](i) and double mutation lost the sensitivity to high [Mg(2+)](i). These results suggest that E8 and E12 are involved in regulation of Cx36 GJ channels by Mg(2+) and H(+) ions. ?Modulation of Connexin-36 Gap Junction Channels by Intracellular pH an(epmc).pdf DeepDyve Pubget Overpricing