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- EMDB-4179: Combined solid-state NMR, solution-state NMR and EM data for stru... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-4179 | ||||||||||||
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Title | Combined solid-state NMR, solution-state NMR and EM data for structure determination of the tetrahedral aminopeptidase TET2 from P. horikoshii | ||||||||||||
![]() | CryoEM map of the H78C/H248C mutant tetrahedral aminopeptidase from P. horikoshii | ||||||||||||
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![]() | peptidase / protein quality control / oligomer / aminopeptidase / PEPTIDE BINDING PROTEIN | ||||||||||||
Function / homology | Peptidase M42, domain 2 / M42 glutamyl aminopeptidase / Peptidase M42 / Hydrolases; Acting on peptide bonds (peptidases); Aminopeptidases / aminopeptidase activity / metallopeptidase activity / proteolysis / metal ion binding / Tetrahedral aminopeptidase![]() | ||||||||||||
Biological species | ![]() ![]() ![]() ![]() | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.1 Å | ||||||||||||
![]() | Gauto DF / Estrozi LF / Schwieters CD | ||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Integrated NMR and cryo-EM atomic-resolution structure determination of a half-megadalton enzyme complex. Authors: Diego F Gauto / Leandro F Estrozi / Charles D Schwieters / Gregory Effantin / Pavel Macek / Remy Sounier / Astrid C Sivertsen / Elena Schmidt / Rime Kerfah / Guillaume Mas / Jacques-Philippe ...Authors: Diego F Gauto / Leandro F Estrozi / Charles D Schwieters / Gregory Effantin / Pavel Macek / Remy Sounier / Astrid C Sivertsen / Elena Schmidt / Rime Kerfah / Guillaume Mas / Jacques-Philippe Colletier / Peter Güntert / Adrien Favier / Guy Schoehn / Paul Schanda / Jerome Boisbouvier / ![]() ![]() ![]() ![]() ![]() Abstract: Atomic-resolution structure determination is crucial for understanding protein function. Cryo-EM and NMR spectroscopy both provide structural information, but currently cryo-EM does not routinely ...Atomic-resolution structure determination is crucial for understanding protein function. Cryo-EM and NMR spectroscopy both provide structural information, but currently cryo-EM does not routinely give access to atomic-level structural data, and, generally, NMR structure determination is restricted to small (<30 kDa) proteins. We introduce an integrated structure determination approach that simultaneously uses NMR and EM data to overcome the limits of each of these methods. The approach enables structure determination of the 468 kDa large dodecameric aminopeptidase TET2 to a precision and accuracy below 1 Å by combining secondary-structure information obtained from near-complete magic-angle-spinning NMR assignments of the 39 kDa-large subunits, distance restraints from backbone amides and ILV methyl groups, and a 4.1 Å resolution EM map. The resulting structure exceeds current standards of NMR and EM structure determination in terms of molecular weight and precision. Importantly, the approach is successful even in cases where only medium-resolution cryo-EM data are available. | ||||||||||||
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 | ![]() | 12.3 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 14.5 KB 14.5 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 6.8 KB | Display | ![]() |
Images | ![]() ![]() | 111.3 KB 86.2 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 597.8 KB | Display | ![]() |
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Full document | ![]() | 597.4 KB | Display | |
Data in XML | ![]() | 9.6 KB | Display | |
Data in CIF | ![]() | 12.3 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6f3kMC ![]() 6r8nMC 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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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | CryoEM map of the H78C/H248C mutant tetrahedral aminopeptidase from P. horikoshii | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.97 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 : tetrahedral amino-peptidase from P. horikoshii
Entire | Name: tetrahedral amino-peptidase from P. horikoshii |
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Components |
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-Supramolecule #1: tetrahedral amino-peptidase from P. horikoshii
Supramolecule | Name: tetrahedral amino-peptidase from P. horikoshii / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1 / Details: H78C/H248C mutant |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 490 KDa |
-Macromolecule #1: Tetrahedral aminopeptidase
Macromolecule | Name: Tetrahedral aminopeptidase / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO EC number: Hydrolases; Acting on peptide bonds (peptidases); Aminopeptidases |
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Source (natural) | Organism: ![]() ![]() Strain: ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3 |
Molecular weight | Theoretical: 39.071027 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MEVRNMVDYE LLKKVVEAPG VSGYEFLGIR DVVIEEIKDY VDEVKVDKLG NVIAHKKGEG PKVMIAAHMD QIGLMVTHIE KNGFLRVAP IGGVDPKTLI AQRFKVWIDK GKFIYGVGAS VPPHIQKPED RKKAPDWDQI FIDIGAESKE EAEDMGVKIG T VITWDGRL ...String: MEVRNMVDYE LLKKVVEAPG VSGYEFLGIR DVVIEEIKDY VDEVKVDKLG NVIAHKKGEG PKVMIAAHMD QIGLMVTHIE KNGFLRVAP IGGVDPKTLI AQRFKVWIDK GKFIYGVGAS VPPHIQKPED RKKAPDWDQI FIDIGAESKE EAEDMGVKIG T VITWDGRL ERLGKHRFVS IAFDDRIAVY TILEVAKQLK DAKADVYFVA TVQEEVGLRG ARTSAFGIEP DYGFAIDVTI AA DIPGTPE HKQVTHLGKG TAIKIMDRSV ICHPTIVRWL EELAKKHEIP YQLEILLGGG TDAGAIHLTK AGVPTGALSV PAR YIHSNT EVVDERDVDA TVELMTKALE NIHELKI UniProtKB: Tetrahedral aminopeptidase |
-Macromolecule #2: ZINC ION
Macromolecule | Name: ZINC ION / type: ligand / ID: 2 / Number of copies: 2 / Formula: ZN |
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Molecular weight | Theoretical: 65.409 Da |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 1 mg/mL |
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Buffer | pH: 7.4 |
Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 30 sec. / Pretreatment - Atmosphere: AIR |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 293 K / Instrument: FEI VITROBOT MARK IV / Details: Blotting time 2s, force 1, drain time 0.. |
Details | This sample was monodisperse. |
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Electron microscopy
Microscope | FEI POLARA 300 |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Number real images: 90 / Average exposure time: 4.0 sec. / Average electron dose: 40.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Calibrated defocus max: 3.5 µm / Calibrated defocus min: 0.8 µm / Calibrated magnification: 25773 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.0 mm / Nominal magnification: 20000 |
Sample stage | Specimen holder model: GATAN 626 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Tecnai Polara / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Refinement | Protocol: OTHER |
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Output model | ![]() PDB-6f3k: ![]() PDB-6r8n: |