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- EMDB-10215: Cryo-EM structure of the RecBCD Chi partially-recognised complex -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-10215 | |||||||||
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Title | Cryo-EM structure of the RecBCD Chi partially-recognised complex | |||||||||
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Function / homology | ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | ![]() ![]() | |||||||||
![]() | Cheng K / Wilkinson M | |||||||||
![]() | ![]() Title: A conformational switch in response to Chi converts RecBCD from phage destruction to DNA repair. Authors: Kaiying Cheng / Martin Wilkinson / Yuriy Chaban / Dale B Wigley / ![]() Abstract: The RecBCD complex plays key roles in phage DNA degradation, CRISPR array acquisition (adaptation) and host DNA repair. The switch between these roles is regulated by a DNA sequence called Chi. We ...The RecBCD complex plays key roles in phage DNA degradation, CRISPR array acquisition (adaptation) and host DNA repair. The switch between these roles is regulated by a DNA sequence called Chi. We report cryo-EM structures of the Escherichia coli RecBCD complex bound to several different DNA forks containing a Chi sequence, including one in which Chi is recognized and others in which it is not. The Chi-recognized structure shows conformational changes in regions of the protein that contact Chi and reveals a tortuous path taken by the DNA. Sequence specificity arises from interactions with both the RecC subunit and the sequence itself. These structures provide molecular details for how Chi is recognized and insights into the changes that occur in response to Chi binding that switch RecBCD from bacteriophage destruction and CRISPR spacer acquisition to constructive host DNA repair. | |||||||||
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 | ![]() | 48.5 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 20.9 KB 20.9 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 8.6 KB | Display | ![]() |
Images | ![]() | 88.2 KB | ||
Filedesc metadata | ![]() | 8.1 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6sjeMC ![]() 6sjbC ![]() 6sjfC ![]() 6sjgC ![]() 6t2uC ![]() 6t2vC 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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Related items in Molecule of the Month |
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Map
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Annotation | None | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.047 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 : RecBCD bound to a forked Chi-containing DNA substrate
Entire | Name: RecBCD bound to a forked Chi-containing DNA substrate |
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Components |
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-Supramolecule #1: RecBCD bound to a forked Chi-containing DNA substrate
Supramolecule | Name: RecBCD bound to a forked Chi-containing DNA substrate / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Molecular weight | Theoretical: 355 KDa |
-Supramolecule #2: RecBCD
Supramolecule | Name: RecBCD / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1-#3 |
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Source (natural) | Organism: ![]() ![]() ![]() |
-Supramolecule #3: forked Chi-containing DNA substrate
Supramolecule | Name: forked Chi-containing DNA substrate / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #4 |
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Source (natural) | Organism: synthetic construct (others) |
-Macromolecule #1: RecBCD enzyme subunit RecB
Macromolecule | Name: RecBCD enzyme subunit RecB / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: ![]() |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 134.123688 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: GMSDVAETLD PLRLPLQGER LIEASAGTGK TFTIAALYLR LLLGLGGSAA FPRPLTVEEL LVVTFTEAAT AELRGRIRSN IHELRIACL RETTDNPLYE RLLEEIDDKA QAAQWLLLAE RQMDEAAVFT IHGFCQRMLN LNAFESGMLF EQQLIEDESL L RYQACADF ...String: GMSDVAETLD PLRLPLQGER LIEASAGTGK TFTIAALYLR LLLGLGGSAA FPRPLTVEEL LVVTFTEAAT AELRGRIRSN IHELRIACL RETTDNPLYE RLLEEIDDKA QAAQWLLLAE RQMDEAAVFT IHGFCQRMLN LNAFESGMLF EQQLIEDESL L RYQACADF WRRHCYPLPR EIAQVVFETW KGPQALLRDI NRYLQGEAPV IKAPPPDDET LASRHAQIVA RIDTVKQQWR DA VGELDAL IESSGIDRRK FNRSNQAKWI DKISAWAEEE TNSYQLPESL EKFSQRFLED RTKAGGETPR HPLFEAIDQL LAE PLSIRD LVITRALAEI RETVAREKRR RGELGFDDML SRLDSALRSE SGEVLAAAIR TRFPVAMIDE FQDTDPQQYR IFRR IWHHQ PETALLLIGD PKQAIYAFRG ADIFTYMKAR SEVHAHYTLD TNWRSAPGMV NSVNKLFSQT DDAFMFREIP FIPVK SAGK NQALRFVFKG ETQPAMKMWL MEGESCGVGD YQSTMAQVCA AQIRDWLQAG QRGEALLMNG DDARPVRASD ISVLVR SRQ EAAQVRDALT LLEIPSVYLS NRDSVFETLE AQEMLWLLQA VMTPERENTL RSALATSMMG LNALDIETLN NDEHAWD VV VEEFDGYRQI WRKRGVMPML RALMSARNIA ENLLATAGGE RRLTDILHIS ELLQEAGTQL ESEHALVRWL SQHILEPD S NASSQQMRLE SDKHLVQIVT IHKSKGLEYP LVWLPFITNF RVQEQAFYHD RHSFEAVLDL NAAPESVDLA EAERLAEDL RLLYVALTRS VWHCSLGVAP LVRRRGDKKG DTDVHQSALG RLLQKGEPQD AAGLRTCIEA LCDDDIAWQT AQTGDNQPWQ VNDVSTAEL NAKTLQRLPG DNWRVTSYSG LQQRGHGIAQ DLMPRLDVDA AGVASVVEEP TLTPHQFPRG ASPGTFLHSL F EDLDFTQP VDPNWVREKL ELGGFESQWE PVLTEWITAV LQAPLNETGV SLSQLSARNK QVEMEFYLPI SEPLIASQLD TL IRQFDPL SAGCPPLEFM QVRGMLKGFI DLVFRHEGRY YLLAYKSNWL GEDSSAYTQQ AMAAAMQAHR YDLQYQLYTL ALH RYLRHR IADYDYEHHF GGVIYLFLRG VDKEHPQQGI YTTRPNAGLI ALMDEMFAGM TLEEA UniProtKB: RecBCD enzyme subunit RecB |
-Macromolecule #2: RecBCD enzyme subunit RecC
Macromolecule | Name: RecBCD enzyme subunit RecC / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO / EC number: ![]() |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 128.974102 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: MLRVYHSNRL DVLEALMEFI VERERLDDPF EPEMILVQST GMAQWLQMTL SQKFGIAANI DFPLPASFIW DMFVRVLPEI PKESAFNKQ SMSWKLMTLL PQLLEREDFT LLRHYLTDDS DKRKLFQLSS KAADLFDQYL VYRPDWLAQW ETGHLVEGLG E AQAWQAPL ...String: MLRVYHSNRL DVLEALMEFI VERERLDDPF EPEMILVQST GMAQWLQMTL SQKFGIAANI DFPLPASFIW DMFVRVLPEI PKESAFNKQ SMSWKLMTLL PQLLEREDFT LLRHYLTDDS DKRKLFQLSS KAADLFDQYL VYRPDWLAQW ETGHLVEGLG E AQAWQAPL WKALVEYTHQ LGQPRWHRAN LYQRFIETLE SATTCPPGLP SRVFICGISA LPPVYLQALQ ALGKHIEIHL LF TNPCRYY WGDIKDPAYL AKLLTRQRRH SFEDRELPLF RDSENAGQLF NSDGEQDVGN PLLASWGKLG RDYIYLLSDL ESS QELDAF VDVTPDNLLH NIQSDILELE NRAVAGVNIE EFSRSDNKRP LDPLDSSITF HVCHSPQREV EVLHDRLLAM LEED PTLTP RDIIVMVADI DSYSPFIQAV FGSAPADRYL PYAISDRRAR QSHPVLEAFI SLLSLPDSRF VSEDVLALLD VPVLA ARFD ITEEGLRYLR QWVNESGIRW GIDDDNVREL ELPATGQHTW RFGLTRMLLG YAMESAQGEW QSVLPYDESS GLIAEL VGH LASLLMQLNI WRRGLAQERP LEEWLPVCRD MLNAFFLPDA ETEAAMTLIE QQWQAIIAEG LGAQYGDAVP LSLLRDE LA QRLDQERISQ RFLAGPVNIC TLMPMRSIPF KVVCLLGMND GVYPRQLAPL GFDLMSQKPK RGDRSRRDDD RYLFLEAL I SAQQKLYISY IGRSIQDNSE RFPSVLVQEL IDYIGQSHYL PGDEALNCDE SEARVKAHLT CLHTRMPFDP QNYQPGERQ SYAREWLPAA SQAGKAHSEF VQPLPFTLPE TVPLETLQRF WAHPVRAFFQ MRLQVNFRTE DSEIPDTEPF ILEGLSRYQI NQQLLNALV EQDDAERLFR RFRAAGDLPY GAFGEIFWET QCQEMQQLAD RVIACRQPGQ SMEIDLACNG VQITGWLPQV Q PDGLLRWR PSLLSVAQGM QLWLEHLVYC ASGGNGESRL FLRKDGEWRF PPLAAEQALH YLSQLIEGYR EGMSAPLLVL PE SGGAWLK TCYDAQNDAM LDDDSTLQKA RTKFLQAYEG NMMVRGEGDD IWYQRLWRQL TPETMEAIVE QSQRFLLPLF RFN QS UniProtKB: RecBCD enzyme subunit RecC |
-Macromolecule #3: RecBCD enzyme subunit RecD
Macromolecule | Name: RecBCD enzyme subunit RecD / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO / EC number: ![]() |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 66.990367 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: MKLQKQLLEA VEHKQLRPLD VQFALTVAGD EHPAVTLAAA LLSHDAGEGH VCLPLSRLEN NEASHPLLAT CVSEIGELQN WEECLLASQ AVSRGDEPTP MILCGDRLYL NRMWCNERTV ARFFNEVNHA IEVDEALLAQ TLDKLFPVSD EINWQKVAAA V ALTRRISV ...String: MKLQKQLLEA VEHKQLRPLD VQFALTVAGD EHPAVTLAAA LLSHDAGEGH VCLPLSRLEN NEASHPLLAT CVSEIGELQN WEECLLASQ AVSRGDEPTP MILCGDRLYL NRMWCNERTV ARFFNEVNHA IEVDEALLAQ TLDKLFPVSD EINWQKVAAA V ALTRRISV ISGGPGTGKT TTVAKLLAAL IQMADGERCR IRLAAPTGKA AARLTESLGK ALRQLPLTDE QKKRIPEDAS TL HRLLGAQ PGSQRLRHHA GNPLHLDVLV VDEASMIDLP MMSRLIDALP DHARVIFLGD RDQLASVEAG AVLGDICAYA NAG FTAERA RQLSRLTGTH VPAGTGTEAA SLRDSLCLLQ KSYRFGSDSG IGQLAAAINR GDKTAVKTVF QQDFTDIEKR LLQS GEDYI AMLEEALAGY GRYLDLLQAR AEPDLIIQAF NEYQLLCALR EGPFGVAGLN ERIEQFMQQK RKIHRHPHSR WYEGR PVMI ARNDSALGLF NGDIGIALDR GQGTRVWFAM PDGNIKSVQP SRLPEHETTW AMTVHKSQGS EFDHAALILP SQRTPV VTR ELVYTAVTRA RRRLSLYADE RILSAAIATR TERRSGLAAL FSSRE UniProtKB: RecBCD enzyme subunit RecD |
-Macromolecule #4: DNA fork substrate
Macromolecule | Name: DNA fork substrate / type: dna / ID: 4 Details: We generated a splayed fork substrate with single strand overhangs by annealing two synthesised oligonucleotides Number of copies: 1 / Classification: DNA |
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Source (natural) | Organism: synthetic construct (others) |
Molecular weight | Theoretical: 26.15966 KDa |
Sequence | String: (DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT) (DT)(DT)(DT)(DT)(DT)(DG)(DA)(DG)(DC)(DG) (DA)(DC)(DT)(DG)(DC)(DA)(DC)(DT)(DA) (DC)(DA)(DA)(DC)(DA)(DG)(DA)(DA)(DC)(DC) (DA) (DT)(DG)(DG)(DT)(DT)(DC) ...String: (DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT) (DT)(DT)(DT)(DT)(DT)(DG)(DA)(DG)(DC)(DG) (DA)(DC)(DT)(DG)(DC)(DA)(DC)(DT)(DA) (DC)(DA)(DA)(DC)(DA)(DG)(DA)(DA)(DC)(DC) (DA) (DT)(DG)(DG)(DT)(DT)(DC)(DT)(DG) (DT)(DT)(DG)(DT)(DA)(DG)(DT)(DG)(DC)(DA) (DG)(DT) (DC)(DG)(DC)(DT)(DC)(DT)(DT) (DT)(DT)(DT)(DT)(DT)(DT)(DG)(DC)(DT)(DG) (DG)(DT)(DG) (DG)(DT)(DT)(DT)(DT) |
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Concentration | 0.2 mg/mL | ||||||||||||
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Buffer | pH: 8 Component:
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Vitrification | Cryogen name: ETHANE / Chamber humidity: 90 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV / Details: 1s blot before plunging. |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Calibrated magnification: 47755 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Digitization - Dimensions - Width: 3838 pixel / Digitization - Dimensions - Height: 3710 pixel / Digitization - Frames/image: 1-25 / Number grids imaged: 1 / Number real images: 3721 / Average exposure time: 10.0 sec. / Average electron dose: 45.0 e/Å2 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |