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- EMDB-15837: Cryo-EM structure of heteromeric LRRC8A/C Volume-Regulated Anion ... -
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Open data
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Basic information
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Title | Cryo-EM structure of heteromeric LRRC8A/C Volume-Regulated Anion Channel | |||||||||
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Function / homology | ![]() Miscellaneous transport and binding events / pre-B cell differentiation / volume-sensitive anion channel activity / taurine transmembrane transport / aspartate transmembrane transport / cyclic-GMP-AMP transmembrane transporter activity / cyclic-GMP-AMP transmembrane import across plasma membrane / monoatomic anion transmembrane transport / cellular response to osmotic stress / monoatomic anion transport ...Miscellaneous transport and binding events / pre-B cell differentiation / volume-sensitive anion channel activity / taurine transmembrane transport / aspartate transmembrane transport / cyclic-GMP-AMP transmembrane transporter activity / cyclic-GMP-AMP transmembrane import across plasma membrane / monoatomic anion transmembrane transport / cellular response to osmotic stress / monoatomic anion transport / cell volume homeostasis / protein hexamerization / response to osmotic stress / monoatomic ion channel complex / fat cell differentiation / intracellular glucose homeostasis / positive regulation of myoblast differentiation / chloride transmembrane transport / positive regulation of insulin secretion / ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
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Method | ![]() ![]() | |||||||||
![]() | Sawicka M / Dutzler R | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structure of a volume-regulated heteromeric LRRC8A/C channel. Authors: Sonja Rutz / Dawid Deneka / Antje Dittmann / Marta Sawicka / Raimund Dutzler / ![]() Abstract: Volume-regulated anion channels (VRACs) participate in the cellular response to osmotic swelling. These membrane proteins consist of heteromeric assemblies of LRRC8 subunits, whose compositions ...Volume-regulated anion channels (VRACs) participate in the cellular response to osmotic swelling. These membrane proteins consist of heteromeric assemblies of LRRC8 subunits, whose compositions determine permeation properties. Although structures of the obligatory LRRC8A, also referred to as SWELL1, have previously defined the architecture of VRACs, the organization of heteromeric channels has remained elusive. Here we have addressed this question by the structural characterization of murine LRRC8A/C channels. Like LRRC8A, these proteins assemble as hexamers. Despite 12 possible arrangements, we find a predominant organization with an A:C ratio of two. In this assembly, four LRRC8A subunits cluster in their preferred conformation observed in homomers, as pairs of closely interacting proteins that stabilize a closed state of the channel. In contrast, the two interacting LRRC8C subunits show a larger flexibility, underlining their role in the destabilization of the tightly packed A subunits, thereby enhancing the activation properties of the protein. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 10.5 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 16.4 KB 16.4 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 12 KB | Display | ![]() |
Images | ![]() | 41.4 KB | ||
Others | ![]() ![]() | 114.1 MB 114 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8b42MC ![]() 8b40C ![]() 8b41C ![]() 8benC C: citing same article ( M: atomic model generated by this map |
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Similar structure data | Similarity search - Function & homology ![]() |
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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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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.302 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #2
File | emd_15837_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_15837_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
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Sample components
-Entire : Heteromeric LRRC8A/C Volume-Regulated Anion Channel
Entire | Name: Heteromeric LRRC8A/C Volume-Regulated Anion Channel |
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Components |
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-Supramolecule #1: Heteromeric LRRC8A/C Volume-Regulated Anion Channel
Supramolecule | Name: Heteromeric LRRC8A/C Volume-Regulated Anion Channel / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() ![]() ![]() |
-Macromolecule #1: Volume-regulated anion channel subunit LRRC8A
Macromolecule | Name: Volume-regulated anion channel subunit LRRC8A / type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 95.056312 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MSIPVTELRY FADTQPAYRI LKPWWDVFTD YISIVMLMIA VFGGTLQVTQ DKMICLPCKW VTKDSCNDSF RGWAASSPEP TYPNSTVLP TPDTGPTGIK YDLDRHQYNY VDAVCYENRL HWFAKYFPYL VLLHTLIFLA CSNFWFKFPR TSSKLEHFVS I LLKCFDSP ...String: MSIPVTELRY FADTQPAYRI LKPWWDVFTD YISIVMLMIA VFGGTLQVTQ DKMICLPCKW VTKDSCNDSF RGWAASSPEP TYPNSTVLP TPDTGPTGIK YDLDRHQYNY VDAVCYENRL HWFAKYFPYL VLLHTLIFLA CSNFWFKFPR TSSKLEHFVS I LLKCFDSP WTTRALSETV VEESDPKPAF SKMNGSMDKK SSTVSEDVEA TVPMLQRTKS RIEQGIVDRS ETGVLDKKEG EQ AKALFEK VKKFRTHVEE GDIVYRLYMR QTIIKVIKFA LIICYTVYYV HNIKFDVDCT VDIESLTGYR TYRCAHPLAT LFK ILASFY ISLVIFYGLI CMYTLWWMLR RSLKKYSFES IREESSYSDI PDVKNDFAFM LHLIDQYDPL YSKRFAVFLS EVSE NKLRQ LNLNNEWTLD KLRQRLTKNA QDKLELHLFM LSGIPDTVFD LVELEVLKLE LIPDVTIPPS IAQLTGLKEL WLYHT AAKI EAPALAFLRE NLRALHIKFT DIKEIPLWIY SLKTLEELHL TGNLSAENNR YIVIDGLREL KRLKVLRLKS NLSKLP QVV TDVGVHLQKL SINNEGTKLI VLNSLKKMVN LTELELIRCD LERIPHSIFS LHNLQEIDLK DNNLKTIEEI ISFQHLH RL TCLKLWYNHI AYIPIQIGNL TNLERLYLNR NKIEKIPTQL FYCRKLRYLD LSHNNLTFLP ADIGLLQNLQ NLAVTANR I EALPPELFQC RKLRALHLGN NVLQSLPSRV GELTNLTQIE LRGNRLECLP VELGECPLLK RSGLVVEEDL FSTLPPEVK ERLWRADKEQ ALEVLFQ UniProtKB: ![]() |
-Macromolecule #2: Volume-regulated anion channel subunit LRRC8C
Macromolecule | Name: Volume-regulated anion channel subunit LRRC8C / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 93.472594 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MSIPVTEFRQ FSEQQPAFRV LKPWWDVFTD YLSVAMLMIG VFGCTLQVMQ DKIICLPKRV QPAQNHSSVP NVSQAVISTT PLPPPKPSP TNPATVEMKG LKTDLDLQQY SFINQMCYER ALHWYAKYFP YLVLIHTLVF MLCSNFWFKF PGSSSKIEHF I SILGKCFD ...String: MSIPVTEFRQ FSEQQPAFRV LKPWWDVFTD YLSVAMLMIG VFGCTLQVMQ DKIICLPKRV QPAQNHSSVP NVSQAVISTT PLPPPKPSP TNPATVEMKG LKTDLDLQQY SFINQMCYER ALHWYAKYFP YLVLIHTLVF MLCSNFWFKF PGSSSKIEHF I SILGKCFD SPWTTRALSE VSGEDSEEKD NRKNNMNRSG TIQSGPEGNL VRSQSLKSIP EKFVVDKSAA GALDKKEGEQ AK ALFEKVK KFRLHVEEGD ILYAMYVRQT VLKVIKFLII IAYNSALVSK VQFTVDCNVD IQDMTGYKNF SCNHTMAHLF SKL SFCYLC FVSIYGLTCL YTLYWLFYRS LREYSFEYVR QETGIDDIPD VKNDFAFMLH MIDQYDPLYS KRFAVFLSEV SENK LKQLN LNNEWTPDKL RQKLQTNAHN RLELPLIMLS GLPDTVFEIT ELQSLKLEII KNVMIPATIA QLDNLQELCL HQCSV KIHS AALSFLKENL KVLSVKFDDM RELPPWMYGL RNLEELYLVG SLSHDISKNV TLESLRDLKS LKILSIKSNV SKIPQA VVD VSSHLQKMCV HNDGTKLVML NNLKKMTNLT ELELVHCDLE RIPHAVFSLL SLQELDLKEN NLKSIEEIVS FQHLRKL TV LKLWYNSIAY IPEHIKKLTS LERLFFSHNK VEVLPSHLFL CNKIRYLDLS YNDIRFIPPE IGVLQSLQYF SITCNKVE S LPDELYFCKK LKTLKIGKNS LSVLSPKIGN LLFLSYLDIK GNHFEVLPPE LGDCRALKRA RLVVEDALFE TLPSDVREQ MKADALEVLF Q UniProtKB: ![]() |
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Buffer | pH: 8.5 |
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Vitrification | Cryogen name: ETHANE-PROPANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 67.0 e/Å2 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |