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- EMDB-23601: Cryo-EM structure of CasPhi-2 (Cas12j) bound to crRNA and Phospho... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-23601 | |||||||||
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Title | Cryo-EM structure of CasPhi-2 (Cas12j) bound to crRNA and Phosphorothioate-DNA | |||||||||
![]() | LocSpiral map | |||||||||
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![]() | CRISPR / CasPhi / Cas12j / Nuclease / R-loop / crRNA / PAM / RNP / Complex / VIRAL PROTEIN-RNA-DNA / VIRAL PROTEIN-RNA-DNA complex | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.9 Å | |||||||||
![]() | Pausch P / Soczek K | |||||||||
Funding support | ![]()
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![]() | ![]() Title: DNA interference states of the hypercompact CRISPR-CasΦ effector. Authors: Patrick Pausch / Katarzyna M Soczek / Dominik A Herbst / Connor A Tsuchida / Basem Al-Shayeb / Jillian F Banfield / Eva Nogales / Jennifer A Doudna / ![]() Abstract: CRISPR-CasΦ, a small RNA-guided enzyme found uniquely in bacteriophages, achieves programmable DNA cutting as well as genome editing. To investigate how the hypercompact enzyme recognizes and ...CRISPR-CasΦ, a small RNA-guided enzyme found uniquely in bacteriophages, achieves programmable DNA cutting as well as genome editing. To investigate how the hypercompact enzyme recognizes and cleaves double-stranded DNA, we determined cryo-EM structures of CasΦ (Cas12j) in pre- and post-DNA-binding states. The structures reveal a streamlined protein architecture that tightly encircles the CRISPR RNA and DNA target to capture, unwind and cleave DNA. Comparison of the pre- and post-DNA-binding states reveals how the protein rearranges for DNA cleavage upon target recognition. On the basis of these structures, we created and tested mutant forms of CasΦ that cut DNA up to 20-fold faster relative to wild type, showing how this system may be naturally attenuated to improve the fidelity of DNA interference. The structural and mechanistic insights into how CasΦ binds and cleaves DNA should allow for protein engineering for both in vitro diagnostics and genome editing. | |||||||||
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 | ![]() | 5.1 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 20.9 KB 20.9 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 7.7 KB | Display | ![]() |
Images | ![]() | 58.7 KB | ||
Masks | ![]() | 32.4 MB | ![]() | |
Filedesc metadata | ![]() | 6.6 KB | ||
Others | ![]() ![]() ![]() | 16.4 MB 30.1 MB 30.1 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 996.4 KB | Display | ![]() |
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Full document | ![]() | 995.9 KB | Display | |
Data in XML | ![]() | 14.6 KB | Display | |
Data in CIF | ![]() | 18.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7lytMC ![]() 7lysC ![]() 7m5oC C: citing same article ( M: atomic model generated by this map |
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Links
EMDB pages | ![]() ![]() |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | LocSpiral map | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.115 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Mask #1
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Projections & Slices |
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Density Histograms |
-Additional map: cryoSPARC map
File | emd_23601_additional_1.map | ||||||||||||
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Annotation | cryoSPARC map | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: #2
File | emd_23601_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_23601_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
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Sample components
-Entire : Cryo-EM map of CasPhi bound to crRNA and phosphorothioate-DNA in ...
Entire | Name: Cryo-EM map of CasPhi bound to crRNA and phosphorothioate-DNA in the presence of the nuclease magnesium cofactor |
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Components |
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-Supramolecule #1: Cryo-EM map of CasPhi bound to crRNA and phosphorothioate-DNA in ...
Supramolecule | Name: Cryo-EM map of CasPhi bound to crRNA and phosphorothioate-DNA in the presence of the nuclease magnesium cofactor type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4 |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 128 KDa |
-Macromolecule #1: CasPhi
Macromolecule | Name: CasPhi / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 86.127188 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MPKPAVESEF SKVLKKHFPG ERFRSSYMKR GGKILAAQGE EAVVAYLQGK SEEEPPNFQP PAKCHVVTKS RDFAEWPIMK ASEAIQRYI YALSTTERAA CKPGKSSESH AAWFAATGVS NHGYSHVQGL NLIFDHTLGR YDGVLKKVQL RNEKARARLE S INASRADE ...String: MPKPAVESEF SKVLKKHFPG ERFRSSYMKR GGKILAAQGE EAVVAYLQGK SEEEPPNFQP PAKCHVVTKS RDFAEWPIMK ASEAIQRYI YALSTTERAA CKPGKSSESH AAWFAATGVS NHGYSHVQGL NLIFDHTLGR YDGVLKKVQL RNEKARARLE S INASRADE GLPEIKAEEE EVATNETGHL LQPPGINPSF YVYQTISPQA YRPRDEIVLP PEYAGYVRDP NAPIPLGVVR NR CDIQKGC PGYIPEWQRE AGTAISPKTG KAVTVPGLSP KKNKRMRRYW RSEKEKAQDA LLVTVRIGTD WVVIDVRGLL RNA RWRTIA PKDISLNALL DLFTGDPVID VRRNIVTFTY TLDACGTYAR KWTLKGKQTK ATLDKLTATQ TVALVAIDLG QTNP ISAGI SRVTQENGAL QCEPLDRFTL PDDLLKDISA YRIAWDRNEE ELRARSVEAL PEAQQAEVRA LDGVSKETAR TQLCA DFGL DPKRLPWDKM SSNTTFISEA LLSNSVSRDQ VFFTPAPKKG AKKKAPVEVM RKDRTWARAY KPRLSVEAQK LKNEAL WAL KRTSPEYLKL SRRKEELCRR SINYVIEKTR RRTQCQIVIP VIEDLNVRFF HGSGKRLPGW DNFFTAKKEN RWFIQGL HK AFSDLRTHRS FYVFEVRPER TSITCPKCGH CEVGNRDGEA FQCLSCGKTC NADLDVATHN LTQVALTGKT MPKREEPR D AQGTAPARKT KKASKSKAPP AEREDQTPAQ EPSQTSHHHH HH |
-Macromolecule #2: crRNA
Macromolecule | Name: crRNA / type: rna / ID: 2 / Number of copies: 1 |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 14.481651 KDa |
Sequence | String: CAACGAUUGC CCCUCACGAG GGGACAGCUG GUAAUGGGAU ACCUU |
-Macromolecule #3: TS-DNA
Macromolecule | Name: TS-DNA / type: dna / ID: 3 / Number of copies: 1 / Classification: DNA |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 13.615714 KDa |
Sequence | String: (DC)(DG)(DG)(DA)(DG)(DC)(DG)(DG)(DA)(DG) (DG)(DG)(DT)(DG)(DG)(DC)(DG)(DG)(DT)(DA) (DT)(DC)(DC)(DC)(DA)(DT)(DT)(DA)(DC) (DC)(DA)(DG)(DC)(DT)(DT)(DA)(DA)(DC)(DT) (DA) (DC)(DG)(DC)(DG) |
-Macromolecule #4: NTS-DNA*
Macromolecule | Name: NTS-DNA* / type: dna / ID: 4 / Number of copies: 1 / Classification: DNA |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 13.072435 KDa |
Sequence | String: (DC)(DG)(DC)(DG)(DT)(DA)(DG)(DT)(DT)(DA) (DT)(DC)(DG)(DA)(DC)(DC)(DA)(DT)(DT)(DA) (SC)(SC)(SC)(N)(N)(N)(DG)(DG)(DG) (DC)(DC)(DA)(DC)(DC)(DC)(DT)(DC)(DC)(DG) (DC) (DT)(DC)(DC)(DG) |
-Macromolecule #5: ZINC ION
Macromolecule | Name: ZINC ION / type: ligand / ID: 5 / Number of copies: 1 / Formula: ZN |
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Molecular weight | Theoretical: 65.409 Da |
-Macromolecule #6: MAGNESIUM ION
Macromolecule | Name: MAGNESIUM ION / type: ligand / ID: 6 / Number of copies: 2 / Formula: MG |
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Molecular weight | Theoretical: 24.305 Da |
-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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Grid | Model: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY |
Vitrification | Cryogen name: NITROGEN / Chamber humidity: 100 % / Chamber temperature: 281 K / Instrument: FEI VITROBOT MARK IV |
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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: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 200 kV / Electron source: ![]() |
Electron optics | Illumination mode: OTHER / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Talos Arctica / Image courtesy: FEI Company |