[English] 日本語
Yorodumi
- EMDB-35882: Human KCNQ2(F104A)-CaM-PIP2-CBD complex in state I -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: EMDB / ID: EMD-35882
TitleHuman KCNQ2(F104A)-CaM-PIP2-CBD complex in state I
Map data
Sample
  • Complex: human KCNQ2(F104A)-CaM-PIP2-CBD complex in state I
    • Protein or peptide: Potassium voltage-gated channel subfamily KQT member 2
    • Protein or peptide: Calmodulin-1
  • Ligand: cannabidiol
Keywordspotassium voltage-gated channel / CBD / PIP2 / MEMBRANE PROTEIN
Function / homology
Function and homology information


axon initial segment / Voltage gated Potassium channels / node of Ranvier / voltage-gated monoatomic cation channel activity / CaM pathway / Cam-PDE 1 activation / Interaction between L1 and Ankyrins / Sodium/Calcium exchangers / Calmodulin induced events / Reduction of cytosolic Ca++ levels ...axon initial segment / Voltage gated Potassium channels / node of Ranvier / voltage-gated monoatomic cation channel activity / CaM pathway / Cam-PDE 1 activation / Interaction between L1 and Ankyrins / Sodium/Calcium exchangers / Calmodulin induced events / Reduction of cytosolic Ca++ levels / Activation of Ca-permeable Kainate Receptor / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Loss of phosphorylation of MECP2 at T308 / ankyrin binding / CREB1 phosphorylation through the activation of Adenylate Cyclase / PKA activation / negative regulation of high voltage-gated calcium channel activity / CaMK IV-mediated phosphorylation of CREB / Glycogen breakdown (glycogenolysis) / organelle localization by membrane tethering / negative regulation of calcium ion export across plasma membrane / CLEC7A (Dectin-1) induces NFAT activation / Activation of RAC1 downstream of NMDARs / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / presynaptic endocytosis / regulation of cardiac muscle cell action potential / negative regulation of peptidyl-threonine phosphorylation / calcineurin-mediated signaling / positive regulation of ryanodine-sensitive calcium-release channel activity / regulation of cell communication by electrical coupling involved in cardiac conduction / Synthesis of IP3 and IP4 in the cytosol / negative regulation of ryanodine-sensitive calcium-release channel activity / Phase 0 - rapid depolarisation / Negative regulation of NMDA receptor-mediated neuronal transmission / Unblocking of NMDA receptors, glutamate binding and activation / RHO GTPases activate PAKs / Ion transport by P-type ATPases / Uptake and function of anthrax toxins / protein phosphatase activator activity / Long-term potentiation / Regulation of MECP2 expression and activity / Calcineurin activates NFAT / regulation of ryanodine-sensitive calcium-release channel activity / DARPP-32 events / voltage-gated potassium channel activity / action potential / catalytic complex / Smooth Muscle Contraction / regulation of cardiac muscle contraction / detection of calcium ion / RHO GTPases activate IQGAPs / calcium channel inhibitor activity / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / presynaptic cytosol / cellular response to interferon-beta / Protein methylation / Activation of AMPK downstream of NMDARs / positive regulation of protein autophosphorylation / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / Ion homeostasis / eNOS activation / regulation of calcium-mediated signaling / titin binding / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / voltage-gated potassium channel complex / sperm midpiece / calcium channel complex / potassium ion transmembrane transport / substantia nigra development / positive regulation of peptidyl-threonine phosphorylation / calyx of Held / FCERI mediated Ca+2 mobilization / adenylate cyclase activator activity / Ras activation upon Ca2+ influx through NMDA receptor / FCGR3A-mediated IL10 synthesis / regulation of heart rate / sarcomere / protein serine/threonine kinase activator activity / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / regulation of cytokinesis / VEGFR2 mediated cell proliferation / VEGFR2 mediated vascular permeability / Translocation of SLC2A4 (GLUT4) to the plasma membrane / positive regulation of protein serine/threonine kinase activity / spindle microtubule / positive regulation of receptor signaling pathway via JAK-STAT / RAF activation / Transcriptional activation of mitochondrial biogenesis / Stimuli-sensing channels / cellular response to type II interferon / spindle pole / response to calcium ion / calcium-dependent protein binding / RAS processing / Signaling by RAF1 mutants / Signaling by moderate kinase activity BRAF mutants / Paradoxical activation of RAF signaling by kinase inactive BRAF / Signaling downstream of RAS mutants / G2/M transition of mitotic cell cycle
Similarity search - Function
Potassium channel, voltage dependent, KCNQ2 / Ankyrin-G binding site / Ankyrin-G binding motif of KCNQ2-3 / Unstructured region on Potassium channel subunit alpha KvLQT2 / Potassium channel, voltage dependent, KCNQ / Potassium channel, voltage dependent, KCNQ, C-terminal / KCNQ voltage-gated potassium channel / : / EF-hand domain pair / EF-hand, calcium binding motif ...Potassium channel, voltage dependent, KCNQ2 / Ankyrin-G binding site / Ankyrin-G binding motif of KCNQ2-3 / Unstructured region on Potassium channel subunit alpha KvLQT2 / Potassium channel, voltage dependent, KCNQ / Potassium channel, voltage dependent, KCNQ, C-terminal / KCNQ voltage-gated potassium channel / : / EF-hand domain pair / EF-hand, calcium binding motif / EF-Hand 1, calcium-binding site / EF-hand calcium-binding domain. / EF-hand calcium-binding domain profile. / EF-hand domain / Ion transport domain / Ion transport protein / EF-hand domain pair
Similarity search - Domain/homology
Potassium voltage-gated channel subfamily KQT member 2 / Calmodulin-1
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.7 Å
AuthorsMa D / Li D / Guo J
Funding support China, 4 items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2020YFA0908501 China
Ministry of Science and Technology (MoST, China)2018YFA0508100 China
National Natural Science Foundation of China (NSFC)81825021 China
National Natural Science Foundation of China (NSFC)92169202 China
CitationJournal: Nat Commun / Year: 2023
Title: Ligand activation mechanisms of human KCNQ2 channel.
Authors: Demin Ma / Yueming Zheng / Xiaoxiao Li / Xiaoyu Zhou / Zhenni Yang / Yan Zhang / Long Wang / Wenbo Zhang / Jiajia Fang / Guohua Zhao / Panpan Hou / Fajun Nan / Wei Yang / Nannan Su / ...Authors: Demin Ma / Yueming Zheng / Xiaoxiao Li / Xiaoyu Zhou / Zhenni Yang / Yan Zhang / Long Wang / Wenbo Zhang / Jiajia Fang / Guohua Zhao / Panpan Hou / Fajun Nan / Wei Yang / Nannan Su / Zhaobing Gao / Jiangtao Guo /
Abstract: The human voltage-gated potassium channel KCNQ2/KCNQ3 carries the neuronal M-current, which helps to stabilize the membrane potential. KCNQ2 can be activated by analgesics and antiepileptic drugs but ...The human voltage-gated potassium channel KCNQ2/KCNQ3 carries the neuronal M-current, which helps to stabilize the membrane potential. KCNQ2 can be activated by analgesics and antiepileptic drugs but their activation mechanisms remain unclear. Here we report cryo-electron microscopy (cryo-EM) structures of human KCNQ2-CaM in complex with three activators, namely the antiepileptic drug cannabidiol (CBD), the lipid phosphatidylinositol 4,5-bisphosphate (PIP), and HN37 (pynegabine), an antiepileptic drug in the clinical trial, in an either closed or open conformation. The activator-bound structures, along with electrophysiology analyses, reveal the binding modes of two CBD, one PIP, and two HN37 molecules in each KCNQ2 subunit, and elucidate their activation mechanisms on the KCNQ2 channel. These structures may guide the development of antiepileptic drugs and analgesics that target KCNQ2.
History
DepositionApr 9, 2023-
Header (metadata) releaseDec 6, 2023-
Map releaseDec 6, 2023-
UpdateDec 6, 2023-
Current statusDec 6, 2023Processing site: PDBc / Status: Released

-
Structure visualization

Supplemental images

emd_35882.png

Downloads & links

-
Map

FileDownload / File: emd_35882.map.gz / Format: CCP4 / Size: 52.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.93 Å/pix.
x 240 pix.
= 223.2 Å		0.93 Å/pix.
x 240 pix.
= 223.2 Å		0.93 Å/pix.
x 240 pix.
= 223.2 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.93 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0065
Minimum - Maximum-0.037218254 - 0.08053127
Average (Standard dev.)0.00014783176 (±0.0025986203)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions240240240
Spacing240240240
CellA=B=C: 223.2 Å
α=β=γ: 90.0 °

-
Supplemental data

-
Half map: #2

Fileemd_35882_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Half map: #1

Fileemd_35882_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Sample components

-
Entire : human KCNQ2(F104A)-CaM-PIP2-CBD complex in state I

EntireName: human KCNQ2(F104A)-CaM-PIP2-CBD complex in state I
Components
  • Complex: human KCNQ2(F104A)-CaM-PIP2-CBD complex in state I
    • Protein or peptide: Potassium voltage-gated channel subfamily KQT member 2
    • Protein or peptide: Calmodulin-1
  • Ligand: cannabidiol

-
Supramolecule #1: human KCNQ2(F104A)-CaM-PIP2-CBD complex in state I

SupramoleculeName: human KCNQ2(F104A)-CaM-PIP2-CBD complex in state I / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Homo sapiens (human)

-
Macromolecule #1: Potassium voltage-gated channel subfamily KQT member 2

MacromoleculeName: Potassium voltage-gated channel subfamily KQT member 2
type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 73.551719 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MAGKPPKRNA FYRKLQNFLY NVLERPRGWA FIYHAYVFLL VASCLVLSVF STIKEYEKSS EGALYILEIV TIVVFGVEYF VRIWAAGCC CRYRGWRGRL KFARKPFCVI DIMVLIASIA VLAAGSQGNV FATSALRSLR FLQILRMIRM DRRGGTWKLL G SVVYAHSK ...String:
MAGKPPKRNA FYRKLQNFLY NVLERPRGWA FIYHAYVFLL VASCLVLSVF STIKEYEKSS EGALYILEIV TIVVFGVEYF VRIWAAGCC CRYRGWRGRL KFARKPFCVI DIMVLIASIA VLAAGSQGNV FATSALRSLR FLQILRMIRM DRRGGTWKLL G SVVYAHSK ELVTAWYIGF LCLILASFLV YLAEKGENDH FDTYADALWW GLITLTTIGY GDKYPQTWNG RLLAATFTLI GV SFFALPA GILGSGFALK VQEQHRQKHF EKRRNPAAGL IQSAWRFYAT NLSRTDLHST WQYYERTVTV PMYSSQTQTY GAS RLIPPL NQLELLRNLK SKSGLAFRKD PPPEPSPSKG SPCRGPLCGC CPGRSSQKVS LKDRVFSSPR GVAAKGKGSP QAQT VRRSP SADQSLEDSP SKVPKSWSFG DRSRARQAFR IKGAASRQNS EEASLPGEDI VDDKSCPCEF VTEDLTPGLK VSIRA VCVM RFLVSKRKFK ESLRPYDVMD VIEQYSAGHL DMLSRIKSLQ SRVDQIVGRG PAITDKDRTK GPAEAELPED PSMMGR LGK VEKQVLSMEK KLDFLVNIYM QRMGIPPTET EAYFGAKEPE PAPPYHSPED SREHVDRHGC IVKIVRSSSS TGQKNFS VE GGSSGGWSHP QFEK

UniProtKB: Potassium voltage-gated channel subfamily KQT member 2

-
Macromolecule #2: Calmodulin-1

MacromoleculeName: Calmodulin-1 / type: protein_or_peptide / ID: 2 / Number of copies: 4 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 19.615445 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
MADQLTEEQI AEFKEAFSLF DKDGDGTITT KELGTVMRSL GQNPTEAELQ DMINEVDADG NGTIDFPEFL TMMARKMKDT DSEEEIREA FRVFDKDGNG YISAAELRHV MTNLGEKLTD EEVDEMIREA DIDGDGQVNY EEFVQMMTAK LEGGSSGGLV P RGSGGSSG GHHHHHHHH

UniProtKB: Calmodulin-1

-
Macromolecule #3: cannabidiol

MacromoleculeName: cannabidiol / type: ligand / ID: 3 / Number of copies: 4 / Formula: P0T
Molecular weightTheoretical: 314.462 Da
Chemical component information

ChemComp-P0T:
cannabidiol

-
Experimental details

-
Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

-
Sample preparation

BufferpH: 8
VitrificationCryogen name: ETHANE

-
Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 52.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.5 µm / Nominal defocus min: 0.8 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

-
Image processing

Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

7cr3

Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.7 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 147292
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more