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- EMDB-22585: Cryo-EM structure of CRISPR-Cas surveillance complex with AcrIF14 -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-22585 | |||||||||
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Title | Cryo-EM structure of CRISPR-Cas surveillance complex with AcrIF14 | |||||||||
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![]() | CRISPR / HYDROLASE-RNA complex | |||||||||
Function / homology | ![]() maintenance of CRISPR repeat elements / endonuclease activity / defense response to virus / Hydrolases; Acting on ester bonds / RNA binding Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.2 Å | |||||||||
![]() | Chang L / Li Z | |||||||||
![]() | ![]() Title: Structural basis for inhibition of the type I-F CRISPR-Cas surveillance complex by AcrIF4, AcrIF7 and AcrIF14. Authors: Clinton Gabel / Zhuang Li / Heng Zhang / Leifu Chang / ![]() Abstract: CRISPR-Cas systems are adaptive immune systems in bacteria and archaea to defend against mobile genetic elements (MGEs) and have been repurposed as genome editing tools. Anti-CRISPR (Acr) proteins ...CRISPR-Cas systems are adaptive immune systems in bacteria and archaea to defend against mobile genetic elements (MGEs) and have been repurposed as genome editing tools. Anti-CRISPR (Acr) proteins are produced by MGEs to counteract CRISPR-Cas systems and can be used to regulate genome editing by CRISPR techniques. Here, we report the cryo-EM structures of three type I-F Acr proteins, AcrIF4, AcrIF7 and AcrIF14, bound to the type I-F CRISPR-Cas surveillance complex (the Csy complex) from Pseudomonas aeruginosa. AcrIF4 binds to an unprecedented site on the C-terminal helical bundle of Cas8f subunit, precluding conformational changes required for activation of the Csy complex. AcrIF7 mimics the PAM duplex of target DNA and is bound to the N-terminal DNA vise of Cas8f. Two copies of AcrIF14 bind to the thumb domains of Cas7.4f and Cas7.6f, preventing hybridization between target DNA and the crRNA. Our results reveal structural detail of three AcrIF proteins, each binding to a different site on the Csy complex for inhibiting degradation of MGEs. | |||||||||
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 | ![]() | 3.5 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 15.2 KB 15.2 KB | Display Display | ![]() |
Images | ![]() | 165.8 KB | ||
Filedesc metadata | ![]() | 6.1 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7jzzMC ![]() 7jzwC ![]() 7jzxC C: citing same article ( M: atomic model generated by this map |
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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: 1.05 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 : CRISPR-Cas complex
Entire | Name: CRISPR-Cas complex |
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Components |
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-Supramolecule #1: CRISPR-Cas complex
Supramolecule | Name: CRISPR-Cas complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: CRISPR-associated protein Csy1
Macromolecule | Name: CRISPR-associated protein Csy1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 49.194168 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MTSPLPTPTW QELRQFIESF IQERLQGKLD KLQPDEDDKR QTLLATHRRE AWLADAARRV GQLQLVTHTL KPIHPDARGS NLHSLPQAP GQPGLAGSHE LGDRLVSDVV GNAAALDVFK FLSLQYQGKN LLNWLTEDSA EALQALSDNA EQAREWRQAF I GITTVKGA ...String: MTSPLPTPTW QELRQFIESF IQERLQGKLD KLQPDEDDKR QTLLATHRRE AWLADAARRV GQLQLVTHTL KPIHPDARGS NLHSLPQAP GQPGLAGSHE LGDRLVSDVV GNAAALDVFK FLSLQYQGKN LLNWLTEDSA EALQALSDNA EQAREWRQAF I GITTVKGA PASHSLAKQL YFPLPGSGYH LLAPLFPTSL VHHVHALLRE ARFGDAAKAA REARSRQESW PHGFSEYPNL AI QKFGGTK PQNISQLNNE RRGENWLLPS LPPNWQRQNV NAPMRHSSVF EHDFGRTPEV SRLTRTLQRF LAKTVHNNLA IRQ RRAQLV AQICDEALQY AARLRELEPG WSATPGCQLH DAEQLWLDPL RAQTDETFLQ RRLRGDWPAE VGNRFANWLN RAVS SDSQI LGSPEAAQWS QELSKELTMF KEILEDERD UniProtKB: CRISPR-associated protein Csy1 |
-Macromolecule #2: Type I-F CRISPR-associated protein Csy2
Macromolecule | Name: Type I-F CRISPR-associated protein Csy2 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 36.244074 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MSVTDPEALL LLPRLSIQNA NAISSPLTWG FPSPGAFTGF VHALQRRVGI SLDIELDGVG IVCHRFEAQI SQPAGKRTKV FNLTRNPLN RDGSTAAIVE EGRAHLEVSL LLGVHGDGLD DHPAQEIARQ VQEQAGAMRL AGGSILPWCN ERFPAPNAEL L MLGGSDEQ ...String: MSVTDPEALL LLPRLSIQNA NAISSPLTWG FPSPGAFTGF VHALQRRVGI SLDIELDGVG IVCHRFEAQI SQPAGKRTKV FNLTRNPLN RDGSTAAIVE EGRAHLEVSL LLGVHGDGLD DHPAQEIARQ VQEQAGAMRL AGGSILPWCN ERFPAPNAEL L MLGGSDEQ RRKNQRRLTR RLLPGFALVS REALLQQHLE TLRTTLPEAT TLDALLDLCR INFEPPATSS EEEASPPDAA WQ VRDKPGW LVPIPAGYNA LSPLYLPGEV RNARDRETPL RFVENLFGLG EWLSPHRVAA LSDLLWYHHA EPDKGLYRWS TPR FVEHAI A UniProtKB: Uncharacterized protein |
-Macromolecule #3: Type I-F CRISPR-associated endoribonuclease Cas6/Csy4
Macromolecule | Name: Type I-F CRISPR-associated endoribonuclease Cas6/Csy4 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 21.675781 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: FTMDHYLDIR LRPDPEFPPA QLMSVLFGKL HQALVAQGGD RIGVSFPDLD ESRSRLGERL RIHASADDLR ALLARPWLEG LRDHLQFGE PAVVPHPTPY RQVSRVQAKS NPERLRRRLM RRHDLSEEEA RKRIPDTVAR ALDLPFVTLR SQSTGQHFRL F IRHGPLQV TAEEGGFTCY GLSKGGFVPW F UniProtKB: UNIPROTKB: A0A643HZS6 |
-Macromolecule #4: CRISPR type I-F/YPEST-associated protein Csy3
Macromolecule | Name: CRISPR type I-F/YPEST-associated protein Csy3 / type: protein_or_peptide / ID: 4 / Number of copies: 6 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 37.579273 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MSKPILSTAS VLAFERKLDP SDALMSAGAW AQRDASQEWP AVTVREKSVR GTISNRLKTK DRDPAKLDAS IQSPNLQTVD VANLPSDAD TLKVRFTLRV LGGAGTPSAC NDAAYRDKLL QTVATYVNDQ GFAELARRYA HNLANARFLW RNRVGAEAVE V RINHIRQG ...String: MSKPILSTAS VLAFERKLDP SDALMSAGAW AQRDASQEWP AVTVREKSVR GTISNRLKTK DRDPAKLDAS IQSPNLQTVD VANLPSDAD TLKVRFTLRV LGGAGTPSAC NDAAYRDKLL QTVATYVNDQ GFAELARRYA HNLANARFLW RNRVGAEAVE V RINHIRQG EVARAWRFDA LAIGLRDFKA DAELDALAEL IASGLSGSGH VLLEVVAFAR IGDGQEVFPS QELILDKGDK KG QKSKTLY SVRDAAAIHS QKIGNALRTI DTWYPDEDGL GPIAVEPYGS VTSQGKAYRQ PKQKLDFYTL LDNWVLRDEA PAV EQQHYV IANLIRGGVF GEAEEK UniProtKB: CRISPR type I-F/YPEST-associated protein Csy3 |
-Macromolecule #5: AcrF14
Macromolecule | Name: AcrF14 / type: protein_or_peptide / ID: 5 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: unidentified (others) |
Molecular weight | Theoretical: 14.297373 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MKKIEMIEIS QNRQNLTAFL HISEIKAINA KLADGVDVDK KSFDEICSIV LEQYQAKQIS NKQASEIFET LAKANKSFKI EKFRCSHGY NEIYKYSPDH EAYLFYCKGG QGQLNKLIAE NGRFM |
-Macromolecule #6: RNA (61-MER)
Macromolecule | Name: RNA (61-MER) / type: rna / ID: 6 / Number of copies: 1 |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 19.538586 KDa |
Sequence | String: CUAAGAAAUU CACGGCGGGC UUGAUGUCCG CGUCUACCUG AUUCACUGCC GUAUAGGCAG C GENBANK: GENBANK: HQ326201.1 |
-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: 7.5 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 54.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: OTHER / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: INSILICO MODEL |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 226089 |
Initial angle assignment | Type: RANDOM ASSIGNMENT |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |