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Yorodumi- EMDB-4635: Structure of ovine transhydrogenase in the presence of NADP+ in a... -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-4635 | |||||||||
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Title | Structure of ovine transhydrogenase in the presence of NADP+ in a "double face-down" conformation | |||||||||
Map data | Combined map from focused refinement of two domains separately: (dII plus dIII) and (dI). | |||||||||
Sample |
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Function / homology | Function and homology information NAD(P)+ transhydrogenase activity / proton-translocating NAD(P)+ transhydrogenase / proton transmembrane transport / mitochondrial inner membrane / identical protein binding Similarity search - Function | |||||||||
Biological species | Ovis aries (sheep) / Sheep (sheep) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.9 Å | |||||||||
Authors | Kampjut D / Sazanov LA | |||||||||
Funding support | Austria, 1 items
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Citation | Journal: Nature / Year: 2019 Title: Structure and mechanism of mitochondrial proton-translocating transhydrogenase. Authors: Domen Kampjut / Leonid A Sazanov / Abstract: Proton-translocating transhydrogenase (also known as nicotinamide nucleotide transhydrogenase (NNT)) is found in the plasma membranes of bacteria and the inner mitochondrial membranes of eukaryotes. ...Proton-translocating transhydrogenase (also known as nicotinamide nucleotide transhydrogenase (NNT)) is found in the plasma membranes of bacteria and the inner mitochondrial membranes of eukaryotes. NNT catalyses the transfer of a hydride between NADH and NADP, coupled to the translocation of one proton across the membrane. Its main physiological function is the generation of NADPH, which is a substrate in anabolic reactions and a regulator of oxidative status; however, NNT may also fine-tune the Krebs cycle. NNT deficiency causes familial glucocorticoid deficiency in humans and metabolic abnormalities in mice, similar to those observed in type II diabetes. The catalytic mechanism of NNT has been proposed to involve a rotation of around 180° of the entire NADP(H)-binding domain that alternately participates in hydride transfer and proton-channel gating. However, owing to the lack of high-resolution structures of intact NNT, the details of this process remain unclear. Here we present the cryo-electron microscopy structure of intact mammalian NNT in different conformational states. We show how the NADP(H)-binding domain opens the proton channel to the opposite sides of the membrane, and we provide structures of these two states. We also describe the catalytically important interfaces and linkers between the membrane and the soluble domains and their roles in nucleotide exchange. These structures enable us to propose a revised mechanism for a coupling process in NNT that is consistent with a large body of previous biochemical work. Our results are relevant to the development of currently unavailable NNT inhibitors, which may have therapeutic potential in ischaemia reperfusion injury, metabolic syndrome and some cancers. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_4635.map.gz | 1.7 MB | EMDB map data format | |
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Header (meta data) | emd-4635-v30.xml emd-4635.xml | 15.2 KB 15.2 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_4635_fsc.xml | 12.5 KB | Display | FSC data file |
Images | emd_4635.png | 68.6 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-4635 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-4635 | HTTPS FTP |
-Related structure data
Related structure data | 6qtiMC 4637C 6queC 6s59C M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_4635.map.gz / Format: CCP4 / Size: 6.8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Combined map from focused refinement of two domains separately: (dII plus dIII) and (dI). | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.065 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
-Entire : Nicotinamide nucleotide transhydrogenase in the presence of NADP+
Entire | Name: Nicotinamide nucleotide transhydrogenase in the presence of NADP+ |
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Components |
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-Supramolecule #1: Nicotinamide nucleotide transhydrogenase in the presence of NADP+
Supramolecule | Name: Nicotinamide nucleotide transhydrogenase in the presence of NADP+ type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1 |
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Source (natural) | Organism: Ovis aries (sheep) |
Molecular weight | Theoretical: 220 KDa |
-Macromolecule #1: Nicotinamide nucleotide transhydrogenase
Macromolecule | Name: Nicotinamide nucleotide transhydrogenase / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: Sheep (sheep) |
Molecular weight | Theoretical: 114.010305 KDa |
Sequence | String: MANLLKTVVT GCSCPFLSNL GSCKVLPGKK NFLRTFHTHR ILWCKAPVKP GIPYKQLTVG VPKEIFQNEK RVALSPAGVQ ALVKQGFNV VVESGAGEAS KFSDDHYRAA GAQIQGAKEV LASDLVVKVR APMLNPTLGI HEADLLKTSG TLISFIYPAQ N PDLLNKLS ...String: MANLLKTVVT GCSCPFLSNL GSCKVLPGKK NFLRTFHTHR ILWCKAPVKP GIPYKQLTVG VPKEIFQNEK RVALSPAGVQ ALVKQGFNV VVESGAGEAS KFSDDHYRAA GAQIQGAKEV LASDLVVKVR APMLNPTLGI HEADLLKTSG TLISFIYPAQ N PDLLNKLS KRNTTVLAMD QVPRVTIAQG YDALSSMANI AGYKAVVLAA NHFGRFFTGQ ITAAGKVPPA KILIVGGGVA GL ASAGAAK SMGAIVRGFD TRAAALEQFK SLGAEPLEVD LKESGEGQGG YAKEMSKEFI EAEMKLFAQQ CKEVDILIST ALI PGKKAP ILFNKEMIES MKEGSVVVDL AAEAGGNFET TKPGELYVHK GITHIGYTDL PSRMATQAST LYSNNITKLL KAIS PDKDN FYFEVKDDFD FGTMGHVIRG TVVMKDGQVI FPAPTPKNIP QGAPVKQKTV AELEAEKAAT ITPFRKTMTS ASVYT AGLT GILGLGIAAP NLAFSQMVTT FGLAGIVGYH TVWGVTPALH SPLMSVTNAI SGLTAVGGLV LMGGHLYPST TSQGLA ALA TFISSVNIAG GFLVTQRMLD MFKRPTDPPE YNYLYLLPAG TFVGGYLASL YSGYNIEQIM YLGSGLCCVG ALAGLST QG TARLGNALGM IGVAGGLAAT LGGLKPCPEL LAQMSGAMAL GGTIGLTIAK RIQISDLPQL VAAFHSLVGL AAVLTCIA E YIIEYPHFAT DAAANLTKIV AYLGTYIGGV TFSGSLVAYG KLQGILKSAP LLLPGRHLLN AGLLAASVGG IIPFMMDPS FTTGITCLGS VSALSAVMGV TLTAAIGGAD MPVVITVLNS YSGWALCAEG FLLNNNLLTI VGALIGSSGA ILSYIMCVAM NRSLANVIL GGYGTTSTAG GKPMEISGTH TEINLDNAID MIREANSIII TPGYGLCAAK AQYPIADLVK MLSEQGKKVR F GIHPVAGR MPGQLNVLLA EAGVPYDIVL EMDEINHDFP DTDLVLVIGA NDTVNSAAQE DPNSIIAGMP VLEVWKSKQV IV MKRSLGV GYAAVDNPIF YKPNTAMLLG DAKKTCDALQ AKVRESYQK |
-Macromolecule #2: NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
Macromolecule | Name: NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE / type: ligand / ID: 2 / Number of copies: 2 / Formula: NAP |
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Molecular weight | Theoretical: 743.405 Da |
Chemical component information | ChemComp-NAP: |
-Macromolecule #3: NICOTINAMIDE-ADENINE-DINUCLEOTIDE
Macromolecule | Name: NICOTINAMIDE-ADENINE-DINUCLEOTIDE / type: ligand / ID: 3 / Number of copies: 2 / Formula: NAD |
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Molecular weight | Theoretical: 663.425 Da |
Chemical component information | ChemComp-NAD: |
-Macromolecule #4: 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE
Macromolecule | Name: 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE / type: ligand / ID: 4 / Number of copies: 12 / Formula: PC1 |
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Molecular weight | Theoretical: 790.145 Da |
Chemical component information | ChemComp-PC1: |
-Macromolecule #5: DODECANE
Macromolecule | Name: DODECANE / type: ligand / ID: 5 / Number of copies: 3 / Formula: D12 |
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Molecular weight | Theoretical: 170.335 Da |
Chemical component information | ChemComp-D12: |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Concentration | 5 mg/mL | ||||||||||||
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Buffer | pH: 7.4 Component:
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Grid | Model: Quantifoil R0.6/1 / Material: COPPER / Mesh: 300 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Atmosphere: AIR / Pretreatment - Pressure: 0.0007 kPa | ||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV / Details: 4-6 s blotting time. | ||||||||||||
Details | Sample was purified in LMNG (final conc. 0.06%) and contained 0.05% CHAPS as a secondary detergent as well as 5 mM NADP+. |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Number grids imaged: 1 / Number real images: 2160 / Average exposure time: 10.0 sec. / Average electron dose: 72.0 e/Å2 |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |