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- EMDB-10845: Cryo-EM structure of yeast mitochondrial RNA polymerase transcrip... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-10845 | |||||||||
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Title | Cryo-EM structure of yeast mitochondrial RNA polymerase transcription pre-initiation complex | |||||||||
![]() | post process map 3.1A | |||||||||
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![]() | gene transcription / polymerase / RDRP / MTF1 / RPO41 / POLRMT / mtRNAP / DNA / transcription initiation / RNA polymerase / mitochondria / TRANSCRIPTION | |||||||||
Function / homology | ![]() Mitochondrial transcription initiation / mitochondrial DNA-directed RNA polymerase complex / mitochondrial transcription factor activity / mitochondrial promoter sequence-specific DNA binding / transcription initiation at mitochondrial promoter / rRNA (adenine-N6,N6-)-dimethyltransferase activity / mitochondrial transcription / mitochondrial genome maintenance / DNA primase activity / DNA replication, synthesis of primer ...Mitochondrial transcription initiation / mitochondrial DNA-directed RNA polymerase complex / mitochondrial transcription factor activity / mitochondrial promoter sequence-specific DNA binding / transcription initiation at mitochondrial promoter / rRNA (adenine-N6,N6-)-dimethyltransferase activity / mitochondrial transcription / mitochondrial genome maintenance / DNA primase activity / DNA replication, synthesis of primer / positive regulation of DNA-templated transcription, elongation / mitochondrial nucleoid / Transferases; Transferring one-carbon groups; Methyltransferases / mitochondrial intermembrane space / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / mitochondrial matrix / mitochondrion / DNA binding / RNA binding / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.1 Å | |||||||||
![]() | Das K | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Cryo-EM Structures Reveal Transcription Initiation Steps by Yeast Mitochondrial RNA Polymerase. Authors: Brent De Wijngaert / Shemaila Sultana / Anupam Singh / Chhaya Dharia / Hans Vanbuel / Jiayu Shen / Daniel Vasilchuk / Sergio E Martinez / Eaazhisai Kandiah / Smita S Patel / Kalyan Das / ![]() ![]() ![]() Abstract: Mitochondrial RNA polymerase (mtRNAP) is crucial in cellular energy production, yet understanding of mitochondrial DNA transcription initiation lags that of bacterial and nuclear DNA transcription. ...Mitochondrial RNA polymerase (mtRNAP) is crucial in cellular energy production, yet understanding of mitochondrial DNA transcription initiation lags that of bacterial and nuclear DNA transcription. We report structures of two transcription initiation intermediate states of yeast mtRNAP that explain promoter melting, template alignment, DNA scrunching, abortive synthesis, and transition into elongation. In the partially melted initiation complex (PmIC), transcription factor MTF1 makes base-specific interactions with flipped non-template (NT) nucleotides "AAGT" at -4 to -1 positions of the DNA promoter. In the initiation complex (IC), the template in the expanded 7-mer bubble positions the RNA and NTP analog UTPαS, while NT scrunches into an NT loop. The scrunched NT loop is stabilized by the centrally positioned MTF1 C-tail. The IC and PmIC states coexist in solution, revealing a dynamic equilibrium between two functional states. Frequent scrunching/unscruching transitions and the imminent steric clashes of the inflating NT loop and growing RNA:DNA with the C-tail explain abortive synthesis and transition into elongation. | |||||||||
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 | ![]() | 14.5 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 27.1 KB 27.1 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 9.2 KB | Display | ![]() |
Images | ![]() | 172.2 KB | ||
Masks | ![]() | 15.6 MB | ![]() | |
Filedesc metadata | ![]() | 7.8 KB | ||
Others | ![]() ![]() | 49.6 MB 49.6 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 1 MB | Display | ![]() |
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Full document | ![]() | 1 MB | Display | |
Data in XML | ![]() | 15.8 KB | Display | |
Data in CIF | ![]() | 20.4 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6ymvMC ![]() 6ymwC 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 | post process map 3.1A | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.827 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 |
-Half map: Half-1
File | emd_10845_half_map_1.map | ||||||||||||
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Annotation | Half-1 | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: Half-2
File | emd_10845_half_map_2.map | ||||||||||||
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Annotation | Half-2 | ||||||||||||
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Density Histograms |
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Sample components
-Entire : mitochondria DNA-dependent RNA polymerase pre-initiation complex
Entire | Name: mitochondria DNA-dependent RNA polymerase pre-initiation complex |
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Components |
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-Supramolecule #1: mitochondria DNA-dependent RNA polymerase pre-initiation complex
Supramolecule | Name: mitochondria DNA-dependent RNA polymerase pre-initiation complex type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Molecular weight | Theoretical: 202 KDa |
-Supramolecule #2: mitochondria DNA-dependent RNA polymerase pre-initiation complex
Supramolecule | Name: mitochondria DNA-dependent RNA polymerase pre-initiation complex type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1-#2 |
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Source (natural) | Organism: ![]() ![]() |
-Supramolecule #3: DNA
Supramolecule | Name: DNA / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #3-#4 |
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Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: Mitochondrial transcription factor 1
Macromolecule | Name: Mitochondrial transcription factor 1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO EC number: Transferases; Transferring one-carbon groups; Methyltransferases |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 41.151203 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MGGSHHHHHH GMASSVPIPG IKDISKLKFF YGFKYLWNPT VYNKIFDKLD LTKTYKHPEE LKVLDLYPGV GIQSAIFYNK YCPRQYSLL EKRSSLYKFL NAKFEGSPLQ ILKRDPYDWS TYSNLIDEER IFVPEVQSSD HINDKFLTVA NVTGEGSEGL I MQWLSCIG ...String: MGGSHHHHHH GMASSVPIPG IKDISKLKFF YGFKYLWNPT VYNKIFDKLD LTKTYKHPEE LKVLDLYPGV GIQSAIFYNK YCPRQYSLL EKRSSLYKFL NAKFEGSPLQ ILKRDPYDWS TYSNLIDEER IFVPEVQSSD HINDKFLTVA NVTGEGSEGL I MQWLSCIG NKNWLYRFGK VKMLLWMPST TARKLLARPG MHSRSKCSVV REAFTDTKLI AISDANELKG FDSQCIEEWD PI LFSAAEI WPTKGKPIAL VEMDPIDFDF DVDNWDYVTR HLMILKRTPL NTVMDSLGHG GQQYFNSRIT DKDLLKKCPI DLT NDEFIY LTKLFMEWPF KPDILMDFVD MYQTEHSG UniProtKB: Mitochondrial transcription factor 1 |
-Macromolecule #2: DNA-directed RNA polymerase, mitochondrial
Macromolecule | Name: DNA-directed RNA polymerase, mitochondrial / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA-directed RNA polymerase |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 143.282656 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: GAMGSGIQRP SAVTSMTRTR DVMQLWSLLE ACLQSNLMKR AFSILESLYL VPEHKQRFIE DYNMYLNSFS KNDPNFPILK MNEKLTNDL ETSFKDVNYN DKTLAIMIHH ALNFHSTTSS MLLKPIISAY LKMSVNGIRE IFSCLDILTI SDLNILMNDL K VITPSQLP ...String: GAMGSGIQRP SAVTSMTRTR DVMQLWSLLE ACLQSNLMKR AFSILESLYL VPEHKQRFIE DYNMYLNSFS KNDPNFPILK MNEKLTNDL ETSFKDVNYN DKTLAIMIHH ALNFHSTTSS MLLKPIISAY LKMSVNGIRE IFSCLDILTI SDLNILMNDL K VITPSQLP NSVRPILESL TLSPTPVNNI ENEEGLNKVE AENDSKLHKA SNASSDSIKK PSLDPLREVS FHGSTEVLSK DA EKLIAVD TIGMRVIRHT LLGLSLTPEQ KEQISKFKFD ANDNVLKMKP TKNDDNNNSI NFFEIYNSLP TLEEKKAFES ALN IFNQDR QKVLENRATE AARERWKHDF EEAKARGDIS IEKNLNVKLW KWYNEMLPLV KEEINHCRSL LSEKLSDKKG LNKV DTNRL GYGPYLTLID PGKMCVITIL ELLKLNSTGG VIEGMRTARA VISVGKAIEM EFRSEQVLKS ESQAFRDVNK KSPEF KKLV QNAKSVFRSS QIEQSKILWP QSIRARIGSV LISMLIQVAK VSVQGVDPVT KAKVHGEAPA FAHGYQYHNG SKLGVL KIH KTLIRQLNGE RLIASVQPQL LPMLVEPKPW VNWRSGGYHY TQSTLLRTKD SPEQVAYLKA ASDNGDIDRV YDGLNVL GR TPWTVNRKVF DVVSQVWNKG EGFLDIPGAQ DEMVLPPAPP KNSDPSILRA WKLQVKTIAN KFSSDRSNRC DTNYKLEI A RAFLGEKLYF PHNLDFRGRA YPLSPHFNHL GNDMSRGLLI FWHGKKLGPS GLKWLKIHLS NLFGFDKLPL KDRVAFTES HLQDIKDSAE NPLTGDRWWT TADKPWQALA TCFELNEVMK MDNPEEFISH QPVHQDGTCN GLQHYAALGG DVEGATQVNL VPSDKPQDV YAHVARLVQK RLEIAAEKGD ENAKILKDKI TRKVVKQTVM TNVYGVTYVG ATFQIAKQLS PIFDDRKESL D FSKYLTKH VFSAIRELFH SAHLIQDWLG ESAKRISKSI RLDVDEKSFK NGNKPDFMSS VIWTTPLGLP IVQPYREESK KQ VETNLQT VFISDPFAVN PVNARRQKAG LPPNFIHSLD ASHMLLSAAE CGKQGLDFAS VHDSYWTHAS DIDTMNVVLR EQF IKLHEV DLVLRLKEEF DQRYKNYVKI GKLKRSTDLA QKIIRIRKDL SRKLGRSTTL ADEIYFEKKR QELLNSPLIE DRNV GEKMV TTVSLFEDIT DLDALELENG GDENSGMSVL LPLRLPEIPP KGDFDVTVLR NSQYFFS UniProtKB: DNA-directed RNA polymerase, mitochondrial |
-Macromolecule #3: DNA (33-MER) NON-TEMPLATE
Macromolecule | Name: DNA (33-MER) NON-TEMPLATE / type: dna / ID: 3 / Number of copies: 1 / Classification: DNA |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 10.248671 KDa |
Sequence | String: (DC)(DG)(DA)(DA)(DT)(DA)(DA)(DG)(DT)(DA) (DT)(DT)(DG)(DA)(DT)(DA)(DT)(DA)(DA)(DG) (DT)(DA)(DA)(DT)(DA)(DG)(DA)(DT)(DA) (DA)(DT)(DG)(DC) |
-Macromolecule #4: DNA (33-MER) template
Macromolecule | Name: DNA (33-MER) template / type: dna / ID: 4 / Number of copies: 1 / Classification: DNA |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 10.047511 KDa |
Sequence | String: (DG)(DC)(DA)(DT)(DT)(DA)(DT)(DC)(DT)(DA) (DC)(DC)(DG)(DA)(DC)(DA)(DA)(DT)(DA)(DT) (DC)(DA)(DA)(DT)(DA)(DC)(DT)(DT)(DA) (DT)(DT)(DC)(DG) |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 1.0 mg/mL |
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Buffer | pH: 7 Details: 50mM Bis-tris propane, 100mM NaCl, 5mM MgCl2, 1mM EDTA, 2mM DTT |
Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 200 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 30 sec. / Pretreatment - Atmosphere: AIR |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 8 K / Instrument: LEICA EM GP / Details: 5 uL sample; back blotting for 12 -14 second. |
Details | The sample was monodisperse with hydrodynamic radius 5.82nm. |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 1 / Average exposure time: 6.0 sec. / Average electron dose: 65.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 100.0 µm / Calibrated defocus max: 26.0 µm / Calibrated defocus min: 5.5 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 22.0 µm / Nominal defocus min: 7.0 µm / Nominal magnification: 165000 |
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
-Atomic model buiding 1
Initial model |
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Details | Realspace refinement | ||||||||
Refinement | Space: REAL / Protocol: FLEXIBLE FIT / Target criteria: Coorelation coefficu=ient | ||||||||
Output model | ![]() PDB-6ymv: |