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- PDB-6tbm: Structure of SAGA bound to TBP, including Spt8 and DUB -

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Database: PDB / ID: 6tbm
TitleStructure of SAGA bound to TBP, including Spt8 and DUB
Components
  • (Subunit of the SAGA ...) x 2
  • (Transcription ...) x 2
  • (Transcriptional ...) x 2
  • Polyubiquitin-B
  • SAGA-associated factor 11
  • Spt20
  • Spt8
  • Subunit (17 kDa) of TFIID and SAGA complexes, involved in RNA polymerase II transcription initiation
  • Subunit (60 kDa) of TFIID and SAGA complexes
  • Subunit (61/68 kDa) of TFIID and SAGA complexes
  • Subunit (90 kDa) of TFIID and SAGA complexes
  • Subunit of SAGA histone acetyltransferase complex
  • TATA-box Binding Protein (TBP)
  • Transcription-associated protein
  • Ubiquitin carboxyl-terminal hydrolase
KeywordsTRANSCRIPTION / Transcriptional co-activator / Histone-acetylation
Function / homology
Function and homology information


SAGA-type complex / regulation of primary metabolic process / RITS complex assembly / DUBm complex / positive regulation of DNA-templated transcription initiation / TFIIA-class transcription factor complex binding / RNA polymerase III transcription regulatory region sequence-specific DNA binding / regulatory ncRNA-mediated heterochromatin formation / RNA polymerase III preinitiation complex assembly / transcription export complex 2 ...SAGA-type complex / regulation of primary metabolic process / RITS complex assembly / DUBm complex / positive regulation of DNA-templated transcription initiation / TFIIA-class transcription factor complex binding / RNA polymerase III transcription regulatory region sequence-specific DNA binding / regulatory ncRNA-mediated heterochromatin formation / RNA polymerase III preinitiation complex assembly / transcription export complex 2 / transcription factor TFIIIB complex / nuclear mRNA surveillance / RNA polymerase I general transcription initiation factor binding / post-transcriptional tethering of RNA polymerase II gene DNA at nuclear periphery / SLIK (SAGA-like) complex / regulation of transcription by RNA polymerase III / transcription factor TFIIA complex / RNA polymerase I preinitiation complex assembly / hypothalamus gonadotrophin-releasing hormone neuron development / SAGA complex / female meiosis I / DNA binding, bending / positive regulation of protein monoubiquitination / fat pad development / mitochondrion transport along microtubule / RNA Polymerase III Transcription Initiation From Type 2 Promoter / poly(A)+ mRNA export from nucleus / RNA polymerase II transcribes snRNA genes / RNA Polymerase II Promoter Escape / RNA Polymerase II Transcription Pre-Initiation And Promoter Opening / RNA Polymerase II Transcription Initiation / RNA Polymerase II Transcription Initiation And Promoter Clearance / RNA polymerase II general transcription initiation factor activity / transcription factor TFIID complex / RNA Polymerase II Pre-transcription Events / female gonad development / seminiferous tubule development / NuA4 histone acetyltransferase complex / RNA Polymerase I Promoter Escape / nucleolar large rRNA transcription by RNA polymerase I / male meiosis I / Estrogen-dependent gene expression / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / protein deubiquitination / nuclear pore / RNA polymerase II core promoter sequence-specific DNA binding / RNA polymerase II preinitiation complex assembly / energy homeostasis / regulation of neuron apoptotic process / regulation of proteasomal protein catabolic process / Maturation of protein E / Maturation of protein E / ER Quality Control Compartment (ERQC) / TBP-class protein binding / Myoclonic epilepsy of Lafora / FLT3 signaling by CBL mutants / Prevention of phagosomal-lysosomal fusion / IRAK2 mediated activation of TAK1 complex / Alpha-protein kinase 1 signaling pathway / Glycogen synthesis / IRAK1 recruits IKK complex / IRAK1 recruits IKK complex upon TLR7/8 or 9 stimulation / Membrane binding and targetting of GAG proteins / Endosomal Sorting Complex Required For Transport (ESCRT) / Regulation of TBK1, IKKε (IKBKE)-mediated activation of IRF3, IRF7 / Negative regulation of FLT3 / PTK6 Regulates RTKs and Their Effectors AKT1 and DOK1 / Constitutive Signaling by NOTCH1 HD Domain Mutants / Regulation of TBK1, IKKε-mediated activation of IRF3, IRF7 upon TLR3 ligation / IRAK2 mediated activation of TAK1 complex upon TLR7/8 or 9 stimulation / NOTCH2 Activation and Transmission of Signal to the Nucleus / TICAM1,TRAF6-dependent induction of TAK1 complex / TICAM1-dependent activation of IRF3/IRF7 / APC/C:Cdc20 mediated degradation of Cyclin B / Regulation of FZD by ubiquitination / Downregulation of ERBB4 signaling / p75NTR recruits signalling complexes / APC-Cdc20 mediated degradation of Nek2A / InlA-mediated entry of Listeria monocytogenes into host cells / TRAF6 mediated IRF7 activation in TLR7/8 or 9 signaling / TRAF6-mediated induction of TAK1 complex within TLR4 complex / Regulation of pyruvate metabolism / Regulation of innate immune responses to cytosolic DNA / NF-kB is activated and signals survival / Downregulation of ERBB2:ERBB3 signaling / Pexophagy / NRIF signals cell death from the nucleus / Regulation of PTEN localization / VLDLR internalisation and degradation / Activated NOTCH1 Transmits Signal to the Nucleus / enzyme activator activity / neuron projection morphogenesis / Synthesis of active ubiquitin: roles of E1 and E2 enzymes / Regulation of BACH1 activity / MAP3K8 (TPL2)-dependent MAPK1/3 activation / regulation of mitochondrial membrane potential / TICAM1, RIP1-mediated IKK complex recruitment / Translesion synthesis by REV1 / Activation of IRF3, IRF7 mediated by TBK1, IKKε (IKBKE) / Translesion synthesis by POLK
Similarity search - Function
Histone acetyltransferases subunit 3 / Histone acetyltransferases subunit 3 / Transcriptional activator Spt7 / Transcriptional coactivator Hfi1/Transcriptional adapter 1 / Transcriptional regulator of RNA polII, SAGA, subunit / Transcription factor Spt20 / Spt20-like, SEP domain / Spt20, SEP domain / SAGA complex, Sgf11 subunit / Sgf11 (transcriptional regulation protein) ...Histone acetyltransferases subunit 3 / Histone acetyltransferases subunit 3 / Transcriptional activator Spt7 / Transcriptional coactivator Hfi1/Transcriptional adapter 1 / Transcriptional regulator of RNA polII, SAGA, subunit / Transcription factor Spt20 / Spt20-like, SEP domain / Spt20, SEP domain / SAGA complex, Sgf11 subunit / Sgf11 (transcriptional regulation protein) / Transcription factor, enhancer of yellow 2 / Transcription factor EnY2 superfamily / Transcription factor e(y)2 / SAGA-associated factor 73 / SCA7 domain / SCA7, zinc-binding domain / SCA7 domain profile. / LisH / Tra1, HEAT repeat ring region / Tra1, HEAT repeat central region / Tra1 HEAT repeat central region / Tra1 HEAT repeat ring region / Transcription initiation factor IID, subunit 13 / Transcription initiation factor IID, 18kD subunit / : / Transcription initiation factor IID, 31kD subunit / Transcription initiation factor TFIID subunit 12 / Transcription initiation factor TFIID subunit A / TFIID subunit TAF5, NTD2 domain superfamily / WD40 associated region in TFIID subunit, NTD2 domain / Transcription initiation factor TAFII31 / TATA box binding protein associated factor (TAF) / Transcription initiation factor TFIID subunit 12 domain / TFIID subunit TAF5, NTD2 domain / Transcription initiation factor TFIID subunit 6 / TAF6, C-terminal HEAT repeat domain superfamily / TAF6 C-terminal HEAT repeat domain / TAF6, C-terminal HEAT repeat domain / Transcription initiation factor TFIID 23-30kDa subunit / Transcription initiation factor TFIID, 23-30kDa subunit / Lissencephaly type-1-like homology motif / : / Ubiquitin Carboxyl-terminal Hydrolase-like zinc finger / Zinc finger, UBP-type / Zn-finger in ubiquitin-hydrolases and other protein / Zinc finger UBP-type profile. / LIS1 homology (LisH) motif profile. / LIS1 homology motif / Ubiquitin specific protease (USP) domain signature 2. / Ubiquitin specific protease (USP) domain signature 1. / Ubiquitin specific protease, conserved site / TATA-box binding protein, eukaryotic / : / TATA-box binding protein / TATA-box binding protein, conserved site / Transcription factor TFIID (or TATA-binding protein, TBP) / Transcription factor TFIID repeat signature. / PIK-related kinase, FAT / FAT domain / FATC / Peptidase C19, ubiquitin carboxyl-terminal hydrolase / Ubiquitin carboxyl-terminal hydrolase / FATC domain / PIK-related kinase / FAT domain profile. / FATC domain profile. / Ubiquitin specific protease domain / Ubiquitin specific protease (USP) domain profile. / TBP domain superfamily / Phosphatidylinositol 3-/4-kinase, catalytic domain superfamily / Phosphoinositide 3-kinase, catalytic domain / Phosphatidylinositol 3- and 4-kinase / Phosphatidylinositol 3- and 4-kinases catalytic domain profile. / Phosphatidylinositol 3-/4-kinase, catalytic domain / Papain-like cysteine peptidase superfamily / TATA box binding protein associated factor / TATA box binding protein associated factor (TAF), histone-like fold domain / : / Ubiquitin domain signature. / Ubiquitin conserved site / Ubiquitin domain / Bromodomain, conserved site / Bromodomain signature. / Histone-fold / Bromodomain / Bromodomain profile. / bromo domain / Bromodomain / Bromodomain-like superfamily / Ubiquitin family / Ubiquitin homologues / Ubiquitin domain profile. / Ubiquitin-like domain / Armadillo-type fold / Zinc finger, RING/FYVE/PHD-type / Ubiquitin-like domain superfamily / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / WD domain, G-beta repeat
Similarity search - Domain/homology
Subunit (60 kDa) of TFIID and SAGA complexes / Transcription initiation factor TFIID subunit 10 / Ubiquitin carboxyl-terminal hydrolase / Transcription-associated protein / Spt20-like SEP domain-containing protein / Subunit of SAGA histone acetyltransferase complex / Transcriptional coactivator HFI1/ADA1 / Transcription initiation factor TFIID subunit 9 / Transcription initiation factor TFIID subunit 12 / Transcription and mRNA export factor SUS1 ...Subunit (60 kDa) of TFIID and SAGA complexes / Transcription initiation factor TFIID subunit 10 / Ubiquitin carboxyl-terminal hydrolase / Transcription-associated protein / Spt20-like SEP domain-containing protein / Subunit of SAGA histone acetyltransferase complex / Transcriptional coactivator HFI1/ADA1 / Transcription initiation factor TFIID subunit 9 / Transcription initiation factor TFIID subunit 12 / Transcription and mRNA export factor SUS1 / Transcriptional regulator involved in glucose repression of Gal4p-regulated genes / SAGA-associated factor 11 / Subunit of the SAGA and SAGA-like transcriptional regulatory complexes, interacts with Spt15p to act / Transcription initiation factor TFIID subunit 5 / Subunit of the SAGA transcriptional regulatory complex, involved in proper assembly of the complex / Ubiquitin B / Polyubiquitin-B / TATA-box-binding protein
Similarity search - Component
Biological speciesKomagataella phaffii (fungus)
Homo sapiens (human)
Komagataella phaffii GS115 (fungus)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 20 Å
AuthorsPapai, G. / Frechard, A. / Kolesnikova, O. / Crucifix, C. / Schultz, P. / Ben-Shem, A.
Funding support France, 3items
OrganizationGrant numberCountry
French National Research AgencyANR-15-CE11-0022-01 France
French National Research AgencyANR-10-LABX-0030-INRT France
French National Research AgencyANR-10-IDEX-0002-02 France
CitationJournal: Nature / Year: 2020
Title: Structure of SAGA and mechanism of TBP deposition on gene promoters.
Authors: Gabor Papai / Alexandre Frechard / Olga Kolesnikova / Corinne Crucifix / Patrick Schultz / Adam Ben-Shem /
Abstract: SAGA (Spt-Ada-Gcn5-acetyltransferase) is a 19-subunit complex that stimulates transcription via two chromatin-modifying enzymatic modules and by delivering the TATA box binding protein (TBP) to ...SAGA (Spt-Ada-Gcn5-acetyltransferase) is a 19-subunit complex that stimulates transcription via two chromatin-modifying enzymatic modules and by delivering the TATA box binding protein (TBP) to nucleate the pre-initiation complex on DNA, a pivotal event in the expression of protein-encoding genes. Here we present the structure of yeast SAGA with bound TBP. The core of the complex is resolved at 3.5 Å resolution (0.143 Fourier shell correlation). The structure reveals the intricate network of interactions that coordinate the different functional domains of SAGA and resolves an octamer of histone-fold domains at the core of SAGA. This deformed octamer deviates considerably from the symmetrical analogue in the nucleosome and is precisely tuned to establish a peripheral site for TBP, where steric hindrance represses binding of spurious DNA. Complementary biochemical analysis points to a mechanism for TBP delivery and release from SAGA that requires transcription factor IIA and whose efficiency correlates with the affinity of DNA to TBP. We provide the foundations for understanding the specific delivery of TBP to gene promoters and the multiple roles of SAGA in regulating gene expression.
History
DepositionNov 1, 2019Deposition site: PDBE / Processing site: PDBE
Revision 1.0Feb 12, 2020Provider: repository / Type: Initial release
Revision 1.1Jun 30, 2021Group: Advisory / Database references ...Advisory / Database references / Derived calculations / Source and taxonomy / Structure summary
Category: em_entity_assembly / em_entity_assembly_naturalsource ...em_entity_assembly / em_entity_assembly_naturalsource / entity / entity_src_gen / entity_src_nat / pdbx_validate_close_contact / struct_conn / struct_ref / struct_ref_seq
Item: _em_entity_assembly.name / _em_entity_assembly_naturalsource.ncbi_tax_id ..._em_entity_assembly.name / _em_entity_assembly_naturalsource.ncbi_tax_id / _em_entity_assembly_naturalsource.organism / _entity.pdbx_description / _entity_src_gen.gene_src_common_name / _entity_src_gen.gene_src_strain / _entity_src_gen.pdbx_beg_seq_num / _entity_src_gen.pdbx_end_seq_num / _entity_src_gen.pdbx_gene_src_gene / _entity_src_gen.pdbx_gene_src_ncbi_taxonomy_id / _entity_src_gen.pdbx_gene_src_scientific_name / _entity_src_gen.pdbx_seq_type / _entity_src_nat.common_name / _entity_src_nat.strain / _struct_ref.db_code / _struct_ref.db_name / _struct_ref.pdbx_db_accession / _struct_ref.pdbx_seq_one_letter_code / _struct_ref_seq.pdbx_db_accession
Revision 1.2Sep 25, 2024Group: Data collection / Database references / Source and taxonomy
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_admin / em_entity_assembly_recombinant
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_admin.last_update / _em_entity_assembly_recombinant.id

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Assembly

Deposited unit
M: TATA-box Binding Protein (TBP)
A: Transcriptional coactivator HFI1/ADA1
C: Subunit of SAGA histone acetyltransferase complex
F: Spt20
D: Subunit of the SAGA and SAGA-like transcriptional regulatory complexes, interacts with Spt15p to act
E: Subunit of the SAGA transcriptional regulatory complex, involved in proper assembly of the complex
J: Transcription initiation factor TFIID subunit 10
K: Subunit (61/68 kDa) of TFIID and SAGA complexes
G: Subunit (90 kDa) of TFIID and SAGA complexes
H: Subunit (60 kDa) of TFIID and SAGA complexes
I: Subunit (17 kDa) of TFIID and SAGA complexes, involved in RNA polymerase II transcription initiation
L: Transcription-associated protein
B: Transcriptional regulator involved in glucose repression of Gal4p-regulated genes
N: Spt8
R: Polyubiquitin-B
Q: Ubiquitin carboxyl-terminal hydrolase
O: SAGA-associated factor 11
P: Transcription and mRNA export factor SUS1


Theoretical massNumber of molelcules
Total (without water)1,280,34018
Polymers1,280,34018
Non-polymers00
Water1,63991
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: mass spectrometry
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 12 types, 12 molecules MCFKGHILNRQO

#1: Protein TATA-box Binding Protein (TBP)


Mass: 27042.275 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Gene: SPT15 / Production host: Escherichia coli (E. coli) / References: UniProt: P13393*PLUS
#3: Protein Subunit of SAGA histone acetyltransferase complex


Mass: 79995.227 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / Gene: PAS_chr1-4_0651 / Production host: Escherichia coli (E. coli) / References: UniProt: C4QZ39
#4: Protein Spt20


Mass: 59530.578 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4QZ05
#8: Protein Subunit (61/68 kDa) of TFIID and SAGA complexes


Mass: 66690.133 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4R150
#9: Protein Subunit (90 kDa) of TFIID and SAGA complexes


Mass: 80933.008 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4R4L4
#10: Protein Subunit (60 kDa) of TFIID and SAGA complexes


Mass: 54888.445 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4QW33
#11: Protein Subunit (17 kDa) of TFIID and SAGA complexes, involved in RNA polymerase II transcription initiation


Mass: 17303.576 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4QZS5
#12: Protein Transcription-associated protein


Mass: 438055.344 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4QYV4
#14: Protein Spt8


Mass: 34059.902 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / Strain: GS115 / ATCC 20864
#15: Protein Polyubiquitin-B


Mass: 8560.831 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: UBB / Production host: Escherichia coli (E. coli) / References: UniProt: J3QS39, UniProt: P0CG47*PLUS
#16: Protein Ubiquitin carboxyl-terminal hydrolase


Mass: 56745.879 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4QY61, ubiquitinyl hydrolase 1
#17: Protein SAGA-associated factor 11


Mass: 13977.742 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4R2D9

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Transcriptional ... , 2 types, 2 molecules AB

#2: Protein Transcriptional coactivator HFI1/ADA1


Mass: 49888.273 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4QZA3
#13: Protein Transcriptional regulator involved in glucose repression of Gal4p-regulated genes


Mass: 81864.305 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4R2A4

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Subunit of the SAGA ... , 2 types, 2 molecules DE

#5: Protein Subunit of the SAGA and SAGA-like transcriptional regulatory complexes, interacts with Spt15p to act


Mass: 39030.105 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4R3E4
#6: Protein Subunit of the SAGA transcriptional regulatory complex, involved in proper assembly of the complex


Mass: 136768.828 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4R5C7

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Transcription ... , 2 types, 2 molecules JP

#7: Protein Transcription initiation factor TFIID subunit 10


Mass: 23879.145 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4QXP2
#18: Protein Transcription and mRNA export factor SUS1


Mass: 11126.675 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)
Strain: GS115 / ATCC 20864 / References: UniProt: C4R1P1

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Non-polymers , 1 types, 91 molecules

#19: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 91 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1SAGA bound to TBPCOMPLEX#1-#180MULTIPLE SOURCES
2TATA-box binding protein (TBP)COMPLEX#11RECOMBINANT
3SAGA componentCOMPLEX#31RECOMBINANT
4Polyubiquitin-BCOMPLEX#151RECOMBINANT
5SAGA complexCOMPLEX#2, #4-#14, #16-#181NATURAL
Molecular weightValue: 1.6 MDa / Experimental value: YES
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Komagataella phaffii GS115 (fungus)644223
23Komagataella phaffii GS115 (fungus)644223
34Homo sapiens (human)9606
45Komagataella phaffii GS115 (fungus)644223
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
12Escherichia coli (E. coli)562
23Escherichia coli (E. coli)562
34Escherichia coli (E. coli)562
Buffer solutionpH: 8
SpecimenConc.: 0.4 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 283 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 105000 X / Nominal defocus max: 3500 nm / Nominal defocus min: 1500 nm / Calibrated defocus min: 800 nm / Calibrated defocus max: 4500 nm / Cs: 0.01 mm / C2 aperture diameter: 70 µm / Alignment procedure: ZEMLIN TABLEAU
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 8 sec. / Electron dose: 52.8 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 QUANTUM (4k x 4k)
EM imaging opticsEnergyfilter name: GIF Quantum LS / Energyfilter slit width: 20 eV

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Processing

EM software
IDNameVersionCategory
2SerialEM3.8 betaimage acquisition
4WarpCTF correction
10RELION3initial Euler assignment
11RELION3final Euler assignment
13RELION33D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 1068534
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 20 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 354104 / Symmetry type: POINT
Atomic model buildingProtocol: OTHER

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