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- EMDB-12718: The structure of the native CNGA1/CNGB1 CNG channel from retinal rods -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-12718 | |||||||||
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Title | The structure of the native CNGA1/CNGB1 CNG channel from retinal rods | |||||||||
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![]() | CNG channel / CNGA1 / CNGB1 / rod / MEMBRANE PROTEIN | |||||||||
Function / homology | ![]() non-motile cilium membrane / rod photoreceptor outer segment / intracellular cyclic nucleotide activated cation channel complex / intracellularly cGMP-activated cation channel activity / Inactivation, recovery and regulation of the phototransduction cascade / intracellularly cAMP-activated cation channel activity / Activation of the phototransduction cascade / molecular sequestering activity / retina homeostasis / sodium channel activity ...non-motile cilium membrane / rod photoreceptor outer segment / intracellular cyclic nucleotide activated cation channel complex / intracellularly cGMP-activated cation channel activity / Inactivation, recovery and regulation of the phototransduction cascade / intracellularly cAMP-activated cation channel activity / Activation of the phototransduction cascade / molecular sequestering activity / retina homeostasis / sodium channel activity / photoreceptor outer segment membrane / sodium ion transport / monoatomic cation transmembrane transport / monoatomic cation transport / cGMP binding / photoreceptor outer segment / transmembrane transporter complex / cAMP binding / visual perception / potassium ion transport / calcium channel activity / calcium ion transport / sensory perception of smell / molecular adaptor activity / positive regulation of gene expression / protein-containing complex binding / protein homodimerization activity / protein-containing complex / identical protein binding / plasma membrane / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.4 Å | |||||||||
![]() | Barret DCA / Marino J | |||||||||
Funding support | ![]()
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![]() | ![]() Title: The structure of the native CNGA1/CNGB1 CNG channel from bovine retinal rods. Authors: Diane C A Barret / Gebhard F X Schertler / U Benjamin Kaupp / Jacopo Marino / ![]() ![]() Abstract: In rod photoreceptors of the retina, the cyclic nucleotide-gated (CNG) channel is composed of three CNGA and one CNGB subunits, and it closes in response to light activation to generate an electrical ...In rod photoreceptors of the retina, the cyclic nucleotide-gated (CNG) channel is composed of three CNGA and one CNGB subunits, and it closes in response to light activation to generate an electrical signal that is conveyed to the brain. Here we report the cryo-EM structure of the closed state of the native rod CNG channel isolated from bovine retina. The structure reveals differences between CNGA1 and CNGB1 subunits. Three CNGA1 subunits are tethered at their C terminus by a coiled-coil region. The C-helix in the cyclic nucleotide-binding domain of CNGB1 features a different orientation from that in the three CNGA1 subunits. The arginine residue R994 of CNGB1 reaches into the ionic pathway and blocks the pore, thus introducing an additional gate, which is different from the central hydrophobic gate known from homomeric CNGA channels. These results address the long-standing question of how CNGB1 subunits contribute to the function of CNG channels in visual and olfactory neurons. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 51.9 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 11.3 KB 11.3 KB | Display Display | ![]() |
Images | ![]() | 28.8 KB | ||
Filedesc metadata | ![]() | 5.9 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 497.7 KB | Display | ![]() |
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Full document | ![]() | 497.3 KB | Display | |
Data in XML | ![]() | 6.3 KB | Display | |
Data in CIF | ![]() | 7.2 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7o4hMC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 1.08 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Native CNGA1/CNGB1a channel
Entire | Name: Native CNGA1/CNGB1a channel |
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Components |
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-Supramolecule #1: Native CNGA1/CNGB1a channel
Supramolecule | Name: Native CNGA1/CNGB1a channel / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all / Details: purified from rod outer segments |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 356 KDa |
-Macromolecule #1: cGMP-gated cation channel alpha-1
Macromolecule | Name: cGMP-gated cation channel alpha-1 / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 79.712164 KDa |
Sequence | String: MKKVIINTWH SFVNIPNVVG PDVEKEITRM ENGACSSFSG DDDDSASMFE ESETENPHAR DSFRSNTHGS GQPSQREQYL PGAIALFNV NNSSNKEQEP KEKKKKKKEK KSKPDDKNEN KKDPEKKKKK EKDKDKKKKE EKGKDKKEEE KKEVVVIDPS G NTYYNWLF ...String: MKKVIINTWH SFVNIPNVVG PDVEKEITRM ENGACSSFSG DDDDSASMFE ESETENPHAR DSFRSNTHGS GQPSQREQYL PGAIALFNV NNSSNKEQEP KEKKKKKKEK KSKPDDKNEN KKDPEKKKKK EKDKDKKKKE EKGKDKKEEE KKEVVVIDPS G NTYYNWLF CITLPVMYNW TMIIARACFD ELQSDYLEYW LAFDYLSDVV YLLDMFVRTR TGYLEQGLLV KEERKLIDKY KS TFQFKLD VLSVIPTDLL YIKFGWNYPE IRLNRLLRIS RMFEFFQRTE TRTNYPNIFR ISNLVMYIII IIHWNACVYF SIS KAIGFG NDTWVYPDVN DPDFGRLARK YVYSLYWSTL TLTTIGETPP PVRDSEYFFV VADFLIGVLI FATIVGNIGS MISN MNAAR AEFQARIDAI KQYMHFRNVS KDMEKRVIKW FDYLWTNKKT VDEREVLKYL PDKLRAEIAI NVHLDTLKKV RIFAD CEAG LLVELVLKLQ PQVYSPGDYI CKKGDIGREM YIIKEGKLAV VADDGITQFV VLSDGSYFGE ISILNIKGSK AGNRRT ANI KSIGYSDLFC LSKDDLMEAL TEYPDAKGML EEKGKQILMK DGLLDINIAN AGSDPKDLEE KVTRMESSVD LLQTRFA RI LAEYESMQQK LKQRLTKVEK FLKPLIDTEF SAIEGSGTES GPTDSTQD UniProtKB: Cyclic nucleotide-gated channel alpha-1 |
-Macromolecule #2: Cyclic nucleotide-gated cation channel beta-1
Macromolecule | Name: Cyclic nucleotide-gated cation channel beta-1 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 155.228562 KDa |
Sequence | String: MLGWVQRVLP QPPGTPQKTK QEEEGTEPEP ELEPKPETAP EETELEEVSL PPEEPCVGKE VAAVTLGPQG TQETALTPPT SLQAQVSVA PEAHSSPRGW VLTWLRKGVE KVVPQPAHSS RPSQNIAAGL ESPDQQAGAQ ILGQCGTGGS DEPSEPSRAE D PGPGPWLL ...String: MLGWVQRVLP QPPGTPQKTK QEEEGTEPEP ELEPKPETAP EETELEEVSL PPEEPCVGKE VAAVTLGPQG TQETALTPPT SLQAQVSVA PEAHSSPRGW VLTWLRKGVE KVVPQPAHSS RPSQNIAAGL ESPDQQAGAQ ILGQCGTGGS DEPSEPSRAE D PGPGPWLL RWFEQNLEKM LPQPPKISEG WRDEPTDAAL GPEPPGPALE IKPMLQAQES PSLPAPGPPE PEEEPIPEPQ PT IQASSLP PPQDSARLMA WILHRLEMAL PQPVIRGKGG EQESDAPVTC DVQTISILPG EQEESHLILE EVDPHWEEDE HQE GSTSTS PRTSEAAPAD EEKGKVVEQT PRELPRIQEE KEDEEEEKED GEEEEEEGRE KEEEEGEEKE EEEGREKEEE EGEK KEEEG REKEEEEGGE KEDEEGREKE EEEGRGKEEE EGGEKEEEEG RGKEEVEGRE EEEDEEEEQD HSVLLDSYLV PQSEE DRSE ESETQDQSEV GGAQAQGEVG GAQALSEESE TQDQSEVGGA QDQSEVGGAQ AQGEVGGAQE QDGVGGAQDQ STSHQE LQE EALADSSGVP ATEEHPELQV EDADADSRPL IAEENPPSPV QLPLSPAKSD TLAVPGSATG SLRKRLPSQD DEAEELK ML SPAASPVVAW SDPTSPQGTD DQDRATSTAS QNSAIINDRL QELVKLFKER TEKVKEKLID PDVTSDEESP KPSPAKKA P EPAPEVKPAE AGQVEEEHYC EMLCCKFKRR PWKKYQFPQS IDPLTNLMYI LWLFFVVLAW NWNCWLIPVR WAFPYQTPD NIHLWLLMDY LCDLIYLLDI TVFQMRLQFV RGGDIITDKK EMRNNYVKSQ RFKMDMLCLL PLDLLYLKFG VNPLLRLPRC LKYMAFFEF NNRLESILSK AYVYRVIRTT AYLLYSLHLN SCLYYWASAY EGLGSTHWVY DGVGNSYIRC YYWAVKTLIT I GGLPDPRT LFEIVFQGLN YFTGVFAFSV MIGQMRDVVG AATAGQTYYR SCMDSTVKYM NFYKIPRSVQ NRVKTWYEYT WH SQGMLDE SELMVQLPDK MRLDLAIDVN YSIVSKVALF QGCDRQMIFD MLKRLRSVVY LPNDYVCKKG EIGREMYIIQ AGQ VQVLGG PDGKSVLVTL KAGSVFGEIS LLAVGGGNRR TANVVAHGFT NLFILDKKDL NEILVHYPES QKLLRKKARR MLRN NNKPK EKSVLILPPR AGTPKLFNAA LAAAGKMGAK GGRGGRLALL RARLKELAAL EAAARQQQLL EQAKSSEDAA VGEEG SASP EQPPRPEPPA PEAPAPEPTA PEPLAPEAPA PEAPAPSSPP PASQERPEGD KDAARPEEHP VRIHVTLGPD PSEQIL LVE VPEKQEEKEK KEEETEEKEE GEEARKEKEE E UniProtKB: Cyclic nucleotide-gated channel beta-1 |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.3 mg/mL |
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Buffer | pH: 7.5 |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 1.5 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: EMDB MAP |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 118084 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: OTHER |