[English] 日本語
![](img/lk-miru.gif)
- EMDB-24932: Cryo-EM Structure of dolphin Prestin: Sensor Down II (Expanded II... -
+
Open data
-
Basic information
Entry | Database: EMDB / ID: EMD-24932 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Title | Cryo-EM Structure of dolphin Prestin: Sensor Down II (Expanded II) state | |||||||||
![]() | ||||||||||
![]() |
| |||||||||
![]() | ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |||||||||
Function / homology | ![]() cochlear outer hair cell electromotile response / secondary active sulfate transmembrane transporter activity / oxalate transmembrane transporter activity / bicarbonate transmembrane transporter activity / chloride transmembrane transporter activity / sensory perception of sound / regulation of cell shape / ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | ![]() ![]() | |||||||||
![]() | Bavi N / Clark MD | |||||||||
Funding support | ![]()
| |||||||||
![]() | ![]() Title: The conformational cycle of prestin underlies outer-hair cell electromotility. Authors: Navid Bavi / Michael David Clark / Gustavo F Contreras / Rong Shen / Bharat G Reddy / Wieslawa Milewski / Eduardo Perozo / ![]() Abstract: The voltage-dependent motor protein prestin (also known as SLC26A5) is responsible for the electromotive behaviour of outer-hair cells and underlies the cochlear amplifier. Knockout or impairment of ...The voltage-dependent motor protein prestin (also known as SLC26A5) is responsible for the electromotive behaviour of outer-hair cells and underlies the cochlear amplifier. Knockout or impairment of prestin causes severe hearing loss. Despite the key role of prestin in hearing, the mechanism by which mammalian prestin senses voltage and transduces it into cellular-scale movements (electromotility) is poorly understood. Here we determined the structure of dolphin prestin in six distinct states using single-particle cryo-electron microscopy. Our structural and functional data suggest that prestin adopts a unique and complex set of states, tunable by the identity of bound anions (Cl or SO). Salicylate, a drug that can cause reversible hearing loss, competes for the anion-binding site of prestin, and inhibits its function by immobilizing prestin in a new conformation. Our data suggest that the bound anion together with its coordinating charged residues and helical dipole act as a dynamic voltage sensor. An analysis of all of the anion-dependent conformations reveals how structural rearrangements in the voltage sensor are coupled to conformational transitions at the protein-membrane interface, suggesting a previously undescribed mechanism of area expansion. Visualization of the electromotility cycle of prestin distinguishes the protein from the closely related SLC26 anion transporters, highlighting the basis for evolutionary specialization of the mammalian cochlear amplifier at a high resolution. | |||||||||
History |
|
-
Structure visualization
Movie |
![]() |
---|---|
Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
-
Downloads & links
-EMDB archive
Map data | ![]() | 57.9 MB | ![]() | |
---|---|---|---|---|
Header (meta data) | ![]() ![]() | 10.7 KB 10.7 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 9.2 KB | Display | ![]() |
Images | ![]() | 61.4 KB | ||
Filedesc metadata | ![]() | 5.7 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7s9cMC ![]() 7s8xC ![]() 7s9aC ![]() 7s9bC ![]() 7s9dC ![]() 7s9eC M: atomic model generated by this map C: citing same article ( |
---|---|
Similar structure data |
-
Links
EMDB pages | ![]() ![]() |
---|---|
Related items in Molecule of the Month |
-
Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Voxel size | X=Y=Z: 1.063 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
|
-Supplemental data
-
Sample components
-Entire : Dolphin Prestin: Sensor Down II (Expanded II) state
Entire | Name: Dolphin Prestin: Sensor Down II (Expanded II) state |
---|---|
Components |
|
-Supramolecule #1: Dolphin Prestin: Sensor Down II (Expanded II) state
Supramolecule | Name: Dolphin Prestin: Sensor Down II (Expanded II) state / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
---|---|
Source (natural) | Organism: ![]() ![]() ![]() |
-Macromolecule #1: Prestin
Macromolecule | Name: Prestin / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO |
---|---|
Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 80.97375 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MDHVEETEIL AATQRYYVER PIFSHPVLQE RLHKKDKISE SIGDKLKQAF TCTPKKIRNI IYMFLPITKW LPAYRFKEYV LGDIVSGIS TGVLQLPQGL AFAMLAAVPP VFGLYSSFYP VIMYCFFGTS RHISIGPFAV ISLMIGGVAV RLVPDDIVIP G GVNATNST ...String: MDHVEETEIL AATQRYYVER PIFSHPVLQE RLHKKDKISE SIGDKLKQAF TCTPKKIRNI IYMFLPITKW LPAYRFKEYV LGDIVSGIS TGVLQLPQGL AFAMLAAVPP VFGLYSSFYP VIMYCFFGTS RHISIGPFAV ISLMIGGVAV RLVPDDIVIP G GVNATNST EARDALRVKV AMSVTLLTGI IQFCLGVCRF GFVAIYLTEP LVRGFTTAAA VHVFTSMLKY LFGVKTKRYS GI FSVVYST VAVLQNVKNL NVCSLGVGLM VFGLLLGGKE FNERFKEKLP APIPLEFFAV VMGTGISAGF SLHESYNVDV VGT LPLGLL PPANPDTSLF HLVYVDAIAI AIVGFSVTIS MAKTLANKHG YQVDGNQELI ALGLCNSTGS LFQTFAISCS LSRS LVQEG TGGKTQLAGC LASLMILLVI LATGFLFESL PQAVLSAIVI VNLKGMFMQF SDLPFFWRTS KIELTIWLTT FVSSL FLGL DYGLITAVII ALMTVIYRTQ SPSYIVLGQL PDTDVYIDID AYEEVKEVPG IKIFQINAPI YYANSDLYSS ALKRKT GVN PAFILGARRK AMKKYAKEVG NANMANATVV KVDAEVDAED GTKPEEEEDE IKYPPIVTKS TLPEELQRFM PPGDNVH TI ILDFTQVNFM DSVGVKTLAG IVKEYGDVGI YVYLAGCSAQ VVSDLTQNQF FENPALLDLL FHSIHDAVLG SQVREALA E QEATAAPPQE DSEPNATPEA UniProtKB: ![]() |
-Experimental details
-Structure determination
Method | ![]() |
---|---|
![]() | ![]() |
Aggregation state | cell |
-
Sample preparation
Concentration | 2.5 mg/mL |
---|---|
Buffer | pH: 7.4 / Component - Concentration: 125.0 mM / Component - Formula: Na2SO4 / Component - Name: sodium sulfate Details: 125 mM Na2SO4, 5mM Mg(OH)2, 20 Tris-OH, 10-15 mM methanesulfonic acid + 0.02 % GDN |
Grid | Model: Quantifoil R1.2/1.3 / Support film - Material: CARBON |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 295 K / Instrument: FEI VITROBOT MARK IV Details: 4.5 s blot times, blot force 3, and double filter papers on each side of the vitrobot.. |
Details | Monodisperse peak at around 14 ml using SEC (Superose 6 column) |
-
Electron microscopy
Microscope | FEI TITAN KRIOS |
---|---|
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 (6k x 4k) / Average electron dose: 1.0 e/Å2 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |