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- EMDB-34270: Structure of the SbCas7-11-crRNA-NTR-Csx29 complex -

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Basic information

Entry
Database: EMDB / ID: EMD-34270
TitleStructure of the SbCas7-11-crRNA-NTR-Csx29 complex
Map data
Sample
  • Complex: ternary complex
    • Protein or peptide: CHAT domain protein
    • Protein or peptide: RAMP superfamily protein
    • RNA: RNA (33-MER)
  • RNA: RNA (5'-R(P*GP*GP*GP*GP*CP*AP*GP*AP*AP*AP*AP*UP*UP*GP*GP*GP*U)-3')
  • Ligand: ZINC ION
KeywordsComplex / RNA-binding / RNA BINDING PROTEIN
Function / homologyCHAT domain / CHAT domain / CHAT domain protein
Function and homology information
Biological speciesCandidatus Scalindua brodae (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsYu G / Wang X / Deng Z / Zhang H
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)32071218 China
CitationJournal: Nucleic Acids Res / Year: 2022
Title: Target RNA-guided protease activity in type III-E CRISPR-Cas system.
Authors: Xiaoshen Wang / Guimei Yu / Yanan Wen / Qiyin An / Xuzichao Li / Fumeng Liao / Chengwei Lian / Kai Zhang / Hang Yin / Yong Wei / Zengqin Deng / Heng Zhang /
Abstract: The type III-E CRISPR-Cas systems are newly identified adaptive immune systems in prokaryotes that use a single Cas7-11 protein to specifically cleave target RNA. Cas7-11 could associate with Csx29, ...The type III-E CRISPR-Cas systems are newly identified adaptive immune systems in prokaryotes that use a single Cas7-11 protein to specifically cleave target RNA. Cas7-11 could associate with Csx29, a putative caspase-like protein encoded by the gene frequently found in the type III-E loci, suggesting a functional linkage between the RNase and protease activities in type III-E systems. Here, we demonstrated that target RNA recognition would stimulate the proteolytic activity of Csx29, and protein Csx30 is the endogenous substrate. More interestingly, while the cognate target RNA recognition would activate Csx29, non-cognate target RNA with the complementary 3' anti-tag sequence inhibits the enzymatic activity. Csx30 could bind to the sigma factor RpoE, which may initiate the stress response after proteolytic cleavage. Combined with biochemical and structural studies, we have elucidated the mechanisms underlying the target RNA-guided proteolytic activity of Csx29. Our work will guide further developments leveraging this simple RNA targeting system for RNA and protein-related applications.
History
DepositionSep 10, 2022-
Header (metadata) releaseJan 18, 2023-
Map releaseJan 18, 2023-
UpdateJun 18, 2025-
Current statusJun 18, 2025Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_34270.png

Downloads & links

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Map

FileDownload / File: emd_34270.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.95 Å/pix.
x 300 pix.
= 285. Å		0.95 Å/pix.
x 300 pix.
= 285. Å		0.95 Å/pix.
x 300 pix.
= 285. Å

Surface

Projections

Slices (1/3)

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Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.95 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.2
Minimum - Maximum-1.0962803 - 1.7762678
Average (Standard dev.)0.00007666546 (±0.035652965)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 285.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_34270_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_34270_half_map_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_34270_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : ternary complex

EntireName: ternary complex
Components
  • Complex: ternary complex
    • Protein or peptide: CHAT domain protein
    • Protein or peptide: RAMP superfamily protein
    • RNA: RNA (33-MER)
  • RNA: RNA (5'-R(P*GP*GP*GP*GP*CP*AP*GP*AP*AP*AP*AP*UP*UP*GP*GP*GP*U)-3')
  • Ligand: ZINC ION

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Supramolecule #1: ternary complex

SupramoleculeName: ternary complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Candidatus Scalindua brodae (bacteria)

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Macromolecule #1: CHAT domain protein

MacromoleculeName: CHAT domain protein / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Candidatus Scalindua brodae (bacteria)
Molecular weightTheoretical: 82.549992 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: MNNTEENIDR IQEPTREDID RKEAERLLDE AFNPRTKPVD RKKIINSALK ILIGLYKEKK DDLTSASFIS IARAYYLVSI TILPKGTTI PEKKKEALRK GIEFIDRAIN KFNGSILDSQ RAFRIKSVLS IEFNRIDREK CDNIKLKNLL NEAVDKGCTD F DTYEWDIQ ...String:
MNNTEENIDR IQEPTREDID RKEAERLLDE AFNPRTKPVD RKKIINSALK ILIGLYKEKK DDLTSASFIS IARAYYLVSI TILPKGTTI PEKKKEALRK GIEFIDRAIN KFNGSILDSQ RAFRIKSVLS IEFNRIDREK CDNIKLKNLL NEAVDKGCTD F DTYEWDIQ IAIRLCELGV DMEGHFDNLI KSNKANDLQK AKAYYFIKKD DHKAKEHMDK CTASLKYTPC SHRLWDETVG FI ERLKGDS STLWRDFAIK TYRSCRVQEK ETGTLRLRWY WSRHRVLYDM AFLAVKEQAD DEEPDVNVKQ AKIKKLAEIS DSL KSRFSL RLSDMEKMPK SDDESNHEFK KFLDKCVTAY QDGYVINRSE DKEGQGENKS TTSKQPEPRP QAKLLELTQV PEGW VVVHF YLNKLEGMGN AIVFDKCANS WQYKEFQYKE LFEVFLTWQA NYNLYKENAA EHLVTLCKKI GETMPFLFCD NFIPN GKDV LFVPHDFLHR LPLHGSIENK TNGKLFLENH SCCYLPAWSF ASEKEASTSD EYVLLKNFDQ GHFETLQNNQ IWGTQS VKD GASSDDLENI RNNPRLLTIL CHGEANMSNP FRSMLKLANG GITYLEILNS VKGLKGSQVI LGACETDLVP PLSDVMD EH YSVATALLLI GAAGVVGTMW KVRSNKTKSL IEWKLENIEY KLNEWQKETG GAAYKDHPPT FYRSIAFRSI GFPL

UniProtKB: CHAT domain protein

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Macromolecule #2: RAMP superfamily protein

MacromoleculeName: RAMP superfamily protein / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Candidatus Scalindua brodae (bacteria)
Molecular weightTheoretical: 197.823797 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: MKSNDMNITV ELTFFEPYRL VEWFDWDARK KSHSAMRGQA FAQWTWKGKG RTAGKSFITG TLVRSAVIKA VEELLSLNNG KWEGVPCCN GSFQTDESKG KKPSFLRKRH TLQWQANNKN ICDKEEACPF CILLGRFDNA GKVHERNKDY DIHFSNFDLD H KQEKNDLR ...String:
MKSNDMNITV ELTFFEPYRL VEWFDWDARK KSHSAMRGQA FAQWTWKGKG RTAGKSFITG TLVRSAVIKA VEELLSLNNG KWEGVPCCN GSFQTDESKG KKPSFLRKRH TLQWQANNKN ICDKEEACPF CILLGRFDNA GKVHERNKDY DIHFSNFDLD H KQEKNDLR LVDIASGRIL NRVDFDTGKA KDYFRTWEAD YETYGTYTGR ITLRNEHAKK LLLASLGFVD KLCGALCRIE VI KKSESPL PSDTKEQSYT KDDTVEVLSE DHNDELRKQA EVIVEAFKQN DKLEKIRILA DAIRTLRLHG EGVIEKDELP DGK EERDKG HHLWDIKVQG TALRTKLKEL WQSNKDIGWR KFTEMLGSNL YLIYKKETGG VSTRFRILGD TEYYSKAHDS EGSD LFIPV TPPEGIETKE WIIVGRLKAA TPFYFGVQQP SDSIPGKEKK SEDSLVINEH TSFNILLDKE NRYRIPRSAL RGALR RDLR TAFGSGCNVS LGGQILCNCK VCIEMRRITL KDSVSDFSEP PEIRYRIAKN PGTATVEDGS LFDIEVGPEG LTFPFV LRY RGHKFPEQLS SVIRYWEEND GKNGMAWLGG LDSTGKGRFA LKDIKIFEWD LNQKINEYIK ERGMRGKEKE LLEMGES SL PDGLIPYKFF EERECLFPYK ENLKPQWSEV QYTIEVGSPL LTADTISALT EPGNRDAIAY KKRVYNDGNN AIEPEPRF A VKSETHRGIF RTAVGRRTGD LGKEDHEDCT CDMCIIFGNE HESSKIRFED LELINGNEFE KLEKHIDHVA IDRFTGGAL DKAKFDTYPL AGSPKKPLKL KGRFWIKKGF SGDHKLLITT ALSDIRDGLY PLGSKGGVGY GWVAGISIDD NVPDDFKEMI NKTEMPLPE EVEESNNGPI NNDYVHPGHQ SPKQDHKNKN IYYPHYFLDS GSKVYREKDI ITHEEFTEEL LSGKINCKLE T LTPLIIPD TSDENGLKLQ GNKPGHKNYK FFNINGELMI PGSELRGMLR THFEALTKSC FAIFGEDSTL SWRMNADEKD YK IDSNSIR KMESQRNPKY RIPDELQKEL RNSGNGLFNR LYTSERRFWS DVSNKFENSI DYKREILRCA GRPKNYKGGI IRQ RKDSLM AEELKVHRLP LYDNFDIPDS AYKANDHCRK SATCSTSRGC RERFTCGIKV RDKNRVFLNA ANNNRQYLNN IKKS NHDLY LQYLKGEKKI RFNSKVITGS ERSPIDVIAE LNERGRQTGF IKLSGLNNSN KSQGNTGTTF NSGWDRFELN ILLDD LETR PSKSDYPRPR LLFTKDQYEY NITKRCERVF EIDKGNKTGY PVDDQIKKNY EDILDSYDGI KDQEVAERFD TFTRGS KLK VGDLVYFHID GDNKIDSLIP VRISRKCASK TLGGKLDKAL HPCTGLSDGL CPGCHLFGTT DYKGRVKFGF AKYENGP EW LITRGNNPER SLTLGVLESP RPAFSIPDDE SEIPGRKFYL HHNGWRIIRQ KQLEIRETVQ PERNVTTEVM DKGNVFSF D VRFENLREWE LGLLLQSLDP GKNIAHKLGK GKPYGFGSVK IKIDSLHTFK INSNNDKIKR VPQSDIREYI NKGYQKLIE WSGNNSIQKG NVLPQWHVIP HIDKLYKLLW VPFLNDSKLE PDVRYPVLNE ESKGYIEGSD YTYKKLGDKD NLPYKTRVKG LTTPWSPWN PFQVIAEHEE QEVNVTGSRP SVTDKIERDG KMV

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Macromolecule #3: RNA (33-MER)

MacromoleculeName: RNA (33-MER) / type: rna / ID: 3 / Number of copies: 1
Source (natural)Organism: Candidatus Scalindua brodae (bacteria)
Molecular weightTheoretical: 10.404171 KDa
SequenceString:
GACUUAAUGU CACGGUACCC AAUUUUCUGC CCC

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Macromolecule #4: RNA (5'-R(P*GP*GP*GP*GP*CP*AP*GP*AP*AP*AP*AP*UP*UP*GP*GP*GP*U)-3')

MacromoleculeName: RNA (5'-R(P*GP*GP*GP*GP*CP*AP*GP*AP*AP*AP*AP*UP*UP*GP*GP*GP*U)-3')
type: rna / ID: 4 / Number of copies: 1
Source (natural)Organism: Candidatus Scalindua brodae (bacteria)
Molecular weightTheoretical: 5.586398 KDa
SequenceString:
GGGGCAGAAA AUUGGGU

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Macromolecule #5: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 5 / Number of copies: 4 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration0.6 mg/mL
BufferpH: 7.5
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Instrument: FEI VITROBOT MARK IV
DetailsNo further treatment.

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Electron microscopy

MicroscopeJEOL CRYO ARM 300
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 40.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.5 µm

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Image processing

CTF correctionType: PHASE FLIPPING ONLY
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 70000
Initial angle assignmentType: RANDOM ASSIGNMENT
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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