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- EMDB-34427: Cryo-EM structure of Oryza sativa plastid glycyl-tRNA synthetase ... -
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Open data
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Basic information
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Title | Cryo-EM structure of Oryza sativa plastid glycyl-tRNA synthetase in complex with two tRNAs (one in tRNA binding state and the other in tRNA locked state) | |||||||||
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![]() | GlyRS2 / Glycine-tRNA ligase / tRNA selection / GlyRS tRNA complex / chloroplasts / LIGASE / LIGASE-RNA complex | |||||||||
Function / homology | ![]() arginine-tRNA ligase activity / arginyl-tRNA aminoacylation / glycyl-tRNA aminoacylation / glycine-tRNA ligase / glycine-tRNA ligase activity / embryo development ending in seed dormancy / regulation of embryonic development / chloroplast / mitochondrion / ATP binding Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.5 Å | |||||||||
![]() | Yu Z / Wu Z / Li Y / Lu G / Lin J | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis of a two-step tRNA recognition mechanism for plastid glycyl-tRNA synthetase. Authors: Zhaoli Yu / Zihan Wu / Ye Li / Qiang Hao / Xiaofeng Cao / Gregor M Blaha / Jinzhong Lin / Guoliang Lu / ![]() ![]() Abstract: Two types of glycyl-tRNA synthetase (GlyRS) are known, the α2 and the α2β2 GlyRSs. Both types of synthetase employ a class II catalytic domain to aminoacylate tRNAGly. In plastids and some ...Two types of glycyl-tRNA synthetase (GlyRS) are known, the α2 and the α2β2 GlyRSs. Both types of synthetase employ a class II catalytic domain to aminoacylate tRNAGly. In plastids and some bacteria, the α and β subunits are fused and are designated as (αβ)2 GlyRSs. While the tRNA recognition and aminoacylation mechanisms are well understood for α2 GlyRSs, little is known about the mechanisms for α2β2/(αβ)2 GlyRSs. Here we describe structures of the (αβ)2 GlyRS from Oryza sativa chloroplast by itself and in complex with cognate tRNAGly. The set of structures reveals that the U-shaped β half of the synthetase selects the tRNA in a two-step manner. In the first step, the synthetase engages the elbow and the anticodon base C35 of the tRNA. In the second step, the tRNA has rotated ∼9° toward the catalytic centre. The synthetase probes the tRNA for the presence of anticodon base C36 and discriminator base C73. This intricate mechanism enables the tRNA to access the active site of the synthetase from a direction opposite to that of most other class II synthetases. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 110 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 15.3 KB 15.3 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 12.8 KB | Display | ![]() |
Images | ![]() | 74.2 KB | ||
Masks | ![]() | 216 MB | ![]() | |
Filedesc metadata | ![]() | 6.2 KB | ||
Others | ![]() ![]() | 200.7 MB 200.7 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8h1cMC ![]() 7xjyC ![]() 7xjzC ![]() 7xk0C ![]() 7xk1C M: atomic model generated by this map C: citing same article ( |
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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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Voxel size | X=Y=Z: 1.1 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
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-Half map: #2
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Density Histograms |
-Half map: #1
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Sample components
-Entire : complex
Entire | Name: complex |
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Components |
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-Supramolecule #1: complex
Supramolecule | Name: complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: Glycine--tRNA ligase
Macromolecule | Name: Glycine--tRNA ligase / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO / EC number: glycine-tRNA ligase |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 117.050477 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: HHHHHHHHGS SLEVLFQGPA VASADGDAPS PVSVSASAAT KGPSSSSVLT FQQAIQRLQD YWASVGCAVM QCSNTEVGAG TMNPLTFLR VLGPEPWNVA YVEPSIRPDD SRYGDNPNRL QRHTQFQVIL KPDPGNSQDL FLHSLSALGI NVREHDIRFV E DNWESPVL ...String: HHHHHHHHGS SLEVLFQGPA VASADGDAPS PVSVSASAAT KGPSSSSVLT FQQAIQRLQD YWASVGCAVM QCSNTEVGAG TMNPLTFLR VLGPEPWNVA YVEPSIRPDD SRYGDNPNRL QRHTQFQVIL KPDPGNSQDL FLHSLSALGI NVREHDIRFV E DNWESPVL GAWGLGWEVW MDGMEITQFT YFQQSGSLPL LPVSVEITYG LERILMSLQG VDHFKNIQYT KGITYGELFL EN EKEMSAY YLEHANVDNI QKHFDDFEEE ARSLLSLWLP IPAYDHVLKA SHAFNILDSR GFVGVTERAR YFGRMRSLAR QCA QLWVKT RENLGYPLGT YQESNLIYPH VSEKPSRKGV VGQPRAFVLE IGTEELPPHD VIEATKQLEK SLIQILEKRR LSHG KVRSY GTPRRLAVVV ENLNMKQMEE EIELRGPPVA KAFDQEGRPT KAAEGFCRKN NVPIDSLYRR TDGKTEYIYA RVKES ARFA DEVLTEDLPT IISGISFPKS MRWNSNIVFS RPIRWIFALH GDLIVPFCFA GISSGNQSCG LRNSSLANFK VEAAEL YLH TLEKAGILID MQERKQRILH DSSILAEGVG GDIIAPDSLV QEVINLVEAP MPIIGRYDVS FLALPKDVLI TVMQKHQ KY FPVTSKTMGN LLPCFITVAN GAIKEEVVRK GNEAVLRARY EDAKFFYKMD TQKKLSEFRD QLSSILFHER LGTMLDKM K RVENTVAEVA LLLGINEKMI PAIKDAAALA MSDLATNIVT EFTSLAGIMA RHYALRDGLS EQIAEALFEI TLPRFSGDV FPKTDPGIVL AVTDRLDSLV GLFGAGCQPS STNDPFGLRR ISYGLVQILV ENKKNFDLTK ALTLVAEEQP ITIDSGVIDE VVQFVTRRL EQLLVDEGIN CEIVRSVLIE RANCPYLASQ TAIEMEAFSR TEDFPKIVEA YSRPTRIIRG KEIGSALEVD A SVFEKDEE RALWSAYLEV ADKIHPGVDI KAFADASLEL LQPLEDFFTN VFVMAEDEKV RNNRLALLTK VASLPKGIAD LS VLPGF UniProtKB: glycine--tRNA ligase |
-Macromolecule #2: tRNA(gly) (74-MER)
Macromolecule | Name: tRNA(gly) (74-MER) / type: rna / ID: 2 / Number of copies: 2 |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 23.906104 KDa |
Sequence | String: (GTP)CGAGCGUAG UUCAAUGGUA AAACAUCUCC UUGCCAAGGA GAAGAUACGG GUUCGAUUCC CGCCGCUCGC CCCA |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.4 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TALOS ARCTICA |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 1.25 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 3.0 µm / Nominal defocus min: 0.8 µm |
Experimental equipment | ![]() Model: Talos Arctica / Image courtesy: FEI Company |