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- EMDB-9742: Cryo-EM structure of AcrVA5-acetylated MbCas12a in complex with crRNA -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-9742 | |||||||||
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Title | Cryo-EM structure of AcrVA5-acetylated MbCas12a in complex with crRNA | |||||||||
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Function / homology | CRISPR-associated endonuclease Cas12a / Cas12a, REC1 domain / Cas12a, RuvC nuclease domain / Cas12a, nuclease domain / Alpha helical recognition lobe domain / Nuclease domain / RuvC nuclease domain / Type V CRISPR-associated protein Cpf1![]() | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.6 Å | |||||||||
![]() | Dong L / Li N / Guan X / Zhu Y / Gao N / Huang Z | |||||||||
Funding support | ![]()
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![]() | ![]() Title: An anti-CRISPR protein disables type V Cas12a by acetylation. Authors: Liyong Dong / Xiaoyu Guan / Ningning Li / Fan Zhang / Yuwei Zhu / Kuan Ren / Ling Yu / Fengxia Zhou / Zhifu Han / Ning Gao / Zhiwei Huang / ![]() Abstract: Phages use anti-CRISPR proteins to deactivate the CRISPR-Cas system. The mechanisms for the inhibition of type I and type II systems by anti-CRISPRs have been elucidated. However, it has remained ...Phages use anti-CRISPR proteins to deactivate the CRISPR-Cas system. The mechanisms for the inhibition of type I and type II systems by anti-CRISPRs have been elucidated. However, it has remained unknown how the type V CRISPR-Cas12a (Cpf1) system is inhibited by anti-CRISPRs. Here we identify the anti-CRISPR protein AcrVA5 and report the mechanisms by which it inhibits CRISPR-Cas12a. Our structural and biochemical data show that AcrVA5 functions as an acetyltransferase to modify Moraxella bovoculi (Mb) Cas12a at Lys635, a residue that is required for recognition of the protospacer-adjacent motif. The AcrVA5-mediated modification of MbCas12a results in complete loss of double-stranded DNA (dsDNA)-cleavage activity. In contrast, the Lys635Arg mutation renders MbCas12a completely insensitive to inhibition by AcrVA5. A cryo-EM structure of the AcrVA5-acetylated MbCas12a reveals that Lys635 acetylation provides sufficient steric hindrance to prevent dsDNA substrates from binding to the Cas protein. Our study reveals an unprecedented mechanism of CRISPR-Cas inhibition and suggests an evolutionary arms race between phages and bacteria. | |||||||||
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 | ![]() | 5.6 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 11.9 KB 11.9 KB | Display Display | ![]() |
Images | ![]() | 90.4 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6iv6MC ![]() 6iufC 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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Voxel size | X=Y=Z: 0.83 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 : cpf1-crRNA
Entire | Name: cpf1-crRNA |
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Components |
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-Supramolecule #1: cpf1-crRNA
Supramolecule | Name: cpf1-crRNA / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() |
Recombinant expression | Organism: ![]() ![]() |
-Macromolecule #1: nuclease
Macromolecule | Name: nuclease / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 145.253391 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MLFQDFTHLY PLSKTVRFEL KPIG(ALY)TLEHI HAKNFLNQDE TMADMYQKVK AILDDYHRDF IADMMGEVKL TKLAEF YDV YLKFRKNPKD DGLQKQLKDL QAVLRKEIVK PIGNGGKYKA GYDRLFGAKL FKDGKELGDL AKFVIAQEGE SSP (ALY)LAHLA ...String: MLFQDFTHLY PLSKTVRFEL KPIG(ALY)TLEHI HAKNFLNQDE TMADMYQKVK AILDDYHRDF IADMMGEVKL TKLAEF YDV YLKFRKNPKD DGLQKQLKDL QAVLRKEIVK PIGNGGKYKA GYDRLFGAKL FKDGKELGDL AKFVIAQEGE SSP (ALY)LAHLA HFEKFSTYFT GFHDNRKNMY SDEDKHTAIA YRLIHENLPR FIDNLQILAT IKQKHSALYD QIINELTASG LDVSLASHL DGYHKLLTQE GITAYNTLLG GISGEAGSRK IQGINELINS HHNQHCHKSE RIAKLRPLHK QILSDGMGVS F LPSKFADD SEVCQAVNEF YRHYADVFAK VQSLFDGFDD YQKDGIYVEY KNLNELSKQA FGDFALLGRV LDGYYVDVVN PE FNERFAK AKTDNAKAKL TKEKDKFIKG VHSLASLEQA IEHYTARHDD ESVQAGKLGQ YFKHGLAGVD NPIQKIHNNH STI KGFLER ERPAGERALP KIKSDKSPEI RQLKELLDNA LNVAHFAKLL TTKTTLHNQD GNFYGEFGAL YDELAKIATL YNKV RDYLS QKPFSTEKYK LNFGNPTLLN GWDLNKEKDN FGVILQKDGC YYLALLDKAH KKVFDNAPNT GKSVYQKMIY KLLPG PNKM LP(ALY)VFFAKSN LDYYNPSAEL LDKYAQGTHK KGDNFNLKDC HALIDFFKAG INKHPEWQHF GFKFSPTSSY QD LSDFYRE VEPQGYQVKF VDINADYINE LVEQGQLYLF QIYNKDFSPK AHGKPNLHTL YFKALFSEDN LVNPIYKLNG EAE IFYRKA SLDMNETTIH RAGEVLENKN PDNPK(ALY)RQFV YDIIKDKRYT QDKFMLHVPI TMNFGVQGMT IKEFNKKVNQ SIQQYDEVN VIGIDRGERH LLYLTVINSK GEILEQRSLN DITTASANGT QMTTPYHKIL DKREIERLNA RVGWGEIETI K ELKSGYLS HVVHQISQLM LKYNAIVVLE DLNFGFKRGC FKVEKQIYQN FENALIKKLN HLVLKDKADD EIGSYKNALQ LT NNFTDLK SIGKQTGFLF YVPAWNTSKI DPETGFVDLL KPRYENIAQS QAFFGKFDKI CYNADRGYFE FHIDYAKFND KAK NSRQIW KICSHGDKRY VYDKTANQNK GATIGVNVND ELKSLFTRYH INDKQPNLVM DICQNNDKEF HKSLMYLLKT LLAL RYSNA SSDEDFILSP VANDEGVFFN SALADDTQPQ NADANGAYHI ALKGLWLLNE LKNSDDLNKV KLAIDNQTWL NFAQN R |
-Macromolecule #2: RNA (59-MER)
Macromolecule | Name: RNA (59-MER) / type: rna / ID: 2 / Number of copies: 1 |
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Source (natural) | Organism: synthetic construct (others) |
Molecular weight | Theoretical: 18.673896 KDa |
Sequence | String: GUCUAACGAC CUUUUAAAUU UCUACUGUUU GUAGAUCUGA UGGUCCAUGU CUGUUACUC |
-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: 8 |
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Vitrification | Cryogen name: NITROGEN |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 81.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: OTHER / Details: making initial model from cisTEM |
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Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 93000 |
Initial angle assignment | Type: PROJECTION MATCHING |
Final angle assignment | Type: PROJECTION MATCHING |