Hyperpolarization-activated, cyclic nucleotide-gated (HCN) channels, underlying 'pacemaker' currents (I(f)/Ih), are involved in pacemaker activity of cardiac sinoatrial node myocytes and central neurons. Several cDNAs deriving from four different genes were recently identified which code for channels characterized by six transmembrane domains and a cyclic nucleotide binding domain. We report here the identification of the human HCN2 gene and show that its functional expression in a human kidney cell line generates a current with properties similar to the native pacemaker f-channel of the heart. The hHCN2 gene maps to the telomeric region of chromosome 19, band p13.3. This is the first identification of a genetic locus coding for an HCN channel.
The human gene coding for HCN2, a pacemaker channel of the heart / T. Vaccari, A. Moroni, M. Rocchi, L. Gorza, M.E. Bianchi, M. Beltrame, D. Difrancesco. - In: BIOCHIMICA ET BIOPHYSICA ACTA. - ISSN 0006-3002. - 1446:3(1999 Sep 03), pp. 419-425.
The human gene coding for HCN2, a pacemaker channel of the heart
T. VaccariPrimo
;A. MoroniSecondo
;M. BeltramePenultimo
;D. DifrancescoUltimo
1999
Abstract
Hyperpolarization-activated, cyclic nucleotide-gated (HCN) channels, underlying 'pacemaker' currents (I(f)/Ih), are involved in pacemaker activity of cardiac sinoatrial node myocytes and central neurons. Several cDNAs deriving from four different genes were recently identified which code for channels characterized by six transmembrane domains and a cyclic nucleotide binding domain. We report here the identification of the human HCN2 gene and show that its functional expression in a human kidney cell line generates a current with properties similar to the native pacemaker f-channel of the heart. The hHCN2 gene maps to the telomeric region of chromosome 19, band p13.3. This is the first identification of a genetic locus coding for an HCN channel.File | Dimensione | Formato | |
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Biochim Biophys Acta 1999 Vaccari.pdf
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