This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.


5u6o

From Proteopedia

(Difference between revisions)
Jump to: navigation, search
Current revision (15:45, 6 March 2024) (edit) (undo)
 
(3 intermediate revisions not shown.)
Line 1: Line 1:
==Structure of the human HCN1 hyperpolarization-activated cyclic nucleotide-gated ion channel==
==Structure of the human HCN1 hyperpolarization-activated cyclic nucleotide-gated ion channel==
-
<StructureSection load='5u6o' size='340' side='right' caption='[[5u6o]], [[Resolution|resolution]] 3.50&Aring;' scene=''>
+
<SX load='5u6o' size='340' side='right' viewer='molstar' caption='[[5u6o]], [[Resolution|resolution]] 3.50&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
-
<table><tr><td colspan='2'>[[5u6o]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5U6O OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5U6O FirstGlance]. <br>
+
<table><tr><td colspan='2'>[[5u6o]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5U6O OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5U6O FirstGlance]. <br>
-
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5u6p|5u6p]]</td></tr>
+
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.5&#8491;</td></tr>
-
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5u6o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5u6o OCA], [http://pdbe.org/5u6o PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5u6o RCSB], [http://www.ebi.ac.uk/pdbsum/5u6o PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5u6o ProSAT]</span></td></tr>
+
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5u6o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5u6o OCA], [https://pdbe.org/5u6o PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5u6o RCSB], [https://www.ebi.ac.uk/pdbsum/5u6o PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5u6o ProSAT]</span></td></tr>
</table>
</table>
== Disease ==
== Disease ==
-
[[http://www.uniprot.org/uniprot/HCN1_HUMAN HCN1_HUMAN]] Early infantile epileptic encephalopathy. The disease is caused by mutations affecting the gene represented in this entry.
+
[https://www.uniprot.org/uniprot/HCN1_HUMAN HCN1_HUMAN] Early infantile epileptic encephalopathy. The disease is caused by mutations affecting the gene represented in this entry.
== Function ==
== Function ==
-
[[http://www.uniprot.org/uniprot/HCN1_HUMAN HCN1_HUMAN]] Hyperpolarization-activated ion channel exhibiting weak selectivity for potassium over sodium ions. Contributes to the native pacemaker currents in heart (If) and in neurons (Ih). May mediate responses to sour stimuli.<ref>PMID:15351778</ref>
+
[https://www.uniprot.org/uniprot/HCN1_HUMAN HCN1_HUMAN] Hyperpolarization-activated ion channel exhibiting weak selectivity for potassium over sodium ions. Contributes to the native pacemaker currents in heart (If) and in neurons (Ih). May mediate responses to sour stimuli.<ref>PMID:15351778</ref>
-
<div style="background-color:#fffaf0;">
+
-
== Publication Abstract from PubMed ==
+
-
Hyperpolarization-activated cyclic nucleotide-gated (HCN) channels underlie the control of rhythmic activity in cardiac and neuronal pacemaker cells. In HCN, the polarity of voltage dependence is uniquely reversed. Intracellular cyclic adenosine monophosphate (cAMP) levels tune the voltage response, enabling sympathetic nerve stimulation to increase the heart rate. We present cryo-electron microscopy structures of the human HCN channel in the absence and presence of cAMP at 3.5 A resolution. HCN channels contain a K+ channel selectivity filter-forming sequence from which the amino acids create a unique structure that explains Na+ and K+ permeability. The voltage sensor adopts a depolarized conformation, and the pore is closed. An S4 helix of unprecedented length extends into the cytoplasm, contacts the C-linker, and twists the inner helical gate shut. cAMP binding rotates cytoplasmic domains to favor opening of the inner helical gate. These structures advance understanding of ion selectivity, reversed polarity gating, and cAMP regulation in HCN channels.
+
-
Structures of the Human HCN1 Hyperpolarization-Activated Channel.,Lee CH, MacKinnon R Cell. 2017 Jan 12;168(1-2):111-120.e11. doi: 10.1016/j.cell.2016.12.023. Epub, 2017 Jan 12. PMID:28086084<ref>PMID:28086084</ref>
+
==See Also==
-
 
+
*[[Ion channels 3D structures|Ion channels 3D structures]]
-
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
+
-
</div>
+
-
<div class="pdbe-citations 5u6o" style="background-color:#fffaf0;"></div>
+
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
-
</StructureSection>
+
</SX>
-
[[Category: Lee, C H]]
+
[[Category: Homo sapiens]]
-
[[Category: MacKinnon, R]]
+
[[Category: Large Structures]]
-
[[Category: Pacemaker ion channel]]
+
[[Category: Lee C-H]]
-
[[Category: Transport protein]]
+
[[Category: MacKinnon R]]

Current revision

Structure of the human HCN1 hyperpolarization-activated cyclic nucleotide-gated ion channel

5u6o, resolution 3.50Å

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5u6o"
Personal tools