8GXQ image
Deposition Date 2022-09-21
Release Date 2022-11-02
Last Version Date 2024-10-30
Entry Detail
PDB ID:
8GXQ
Keywords:
TRANSCRIPTION
Title:
PIC-Mediator in complex with +1 nucleosome (T40N) in MH-binding state
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Xenopus laevis (Taxon ID: 8355)
Sus scrofa (Taxon ID: 9823)
synthetic construct (Taxon ID: 32630)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
5.04 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
8GXQ validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor IIB
Gene (Uniprot):GTF2B
Chain IDs:C (auth: BA)
Chain Length:316
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q00403 Pfam ID:PF08271, PF00382
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 1
Gene (Uniprot):TAF1
Chain IDs:D (auth: DA)
Chain Length:1872
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P21675 Pfam ID:PF09247, PF12157, PF15288, PF00439 EC:2.3.1.48
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 2
Gene (Uniprot):TAF2
Chain IDs:J (auth: DB)
Chain Length:1199
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q6P1X5
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 7
Gene (Uniprot):TAF7
Chain IDs:NA (auth: DG)
Chain Length:349
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q15545 Pfam ID:PF04658
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 8
Gene (Uniprot):TAF8
Chain IDs:OA (auth: DH)
Chain Length:310
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q7Z7C8 Pfam ID:PF07524, PF10406
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor IIA subunit 2
Gene (Uniprot):GTF2A2
Chain IDs:AA (auth: DO)
Chain Length:109
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P52657 Pfam ID:PF02268, PF02751
Protein Blast
Polymer Type:polypeptide(L)
Molecule:TATA-box-binding protein
Gene (Uniprot):TBP
Chain IDs:Y (auth: DP)
Chain Length:339
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P20226 Pfam ID:PF00352
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor IIA subunit 1
Gene (Uniprot):GTF2A1
Chain IDs:Z (auth: DQ)
Chain Length:376
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P52655 Pfam ID:PF03153
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 3
Gene (Uniprot):TAF3
Chain IDs:BA (auth: Dc)
Chain Length:929
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q5VWG9 Pfam ID:PF07524, PF00628
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 4
Gene (Uniprot):TAF4
Chain IDs:CA (auth: Dd), JA (auth: DD)
Chain Length:1085
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:O00268 Pfam ID:PF07531, PF05236
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 5
Gene (Uniprot):TAF5
Chain IDs:DA (auth: De), LA (auth: DE)
Chain Length:800
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:Q15542 Pfam ID:PF04494, PF00400
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 6
Gene (Uniprot):TAF6
Chain IDs:EA (auth: Df), MA (auth: DF)
Chain Length:677
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:P49848 Pfam ID:PF02969, PF07571
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 9
Gene (Uniprot):TAF9
Chain IDs:FA (auth: Di), PA (auth: DI)
Chain Length:264
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:Q16594 Pfam ID:PF02291
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 10
Gene (Uniprot):TAF10
Chain IDs:GA (auth: Dj), QA (auth: DJ)
Chain Length:218
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:Q12962 Pfam ID:PF03540
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 11
Gene (Uniprot):TAF11
Chain IDs:HA (auth: Dk)
Chain Length:211
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q15544 Pfam ID:PF04719
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 12
Gene (Uniprot):TAF12
Chain IDs:IA (auth: Dl), RA (auth: DL)
Chain Length:161
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:Q16514 Pfam ID:PF03847
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 13
Gene (Uniprot):TAF13
Chain IDs:KA (auth: Dm)
Chain Length:124
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q15543 Pfam ID:PF02269
Protein Blast
Polymer Type:polypeptide(L)
Molecule:General transcription factor IIE subunit 1
Gene (Uniprot):GTF2E1
Chain IDs:E (auth: EA)
Chain Length:439
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P29083 Pfam ID:PF02002, PF08271, PF11521
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor IIE subunit beta
Gene (Uniprot):GTF2E2
Chain IDs:K (auth: EB)
Chain Length:291
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P29084 Pfam ID:PF02186, PF18121
Protein Blast
Polymer Type:polypeptide(L)
Molecule:General transcription factor IIF subunit 1
Gene (Uniprot):GTF2F1
Chain IDs:F (auth: FA)
Chain Length:517
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P35269 Pfam ID:PF05793
Protein Blast
Polymer Type:polypeptide(L)
Molecule:General transcription factor IIF subunit 2
Gene (Uniprot):GTF2F2
Chain IDs:L (auth: FB)
Chain Length:249
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P13984 Pfam ID:PF17683, PF02270
Protein Blast
Polymer Type:polypeptide(L)
Molecule:General transcription and DNA repair factor IIH helicase subunit XPD
Gene (Uniprot):ERCC2
Chain IDs:G (auth: HA)
Chain Length:760
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P18074 Pfam ID:PF06733, PF06777, PF13307 EC:3.6.4.12
Protein Blast
Polymer Type:polypeptide(L)
Molecule:General transcription factor IIH subunit 1
Gene (Uniprot):GTF2H1
Chain IDs:M (auth: HB)
Chain Length:548
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P32780 Pfam ID:PF08567, PF03909
Protein Blast
Polymer Type:polypeptide(L)
Molecule:General transcription factor IIH subunit 4
Gene (Uniprot):GTF2H4
Chain IDs:P (auth: HC)
Chain Length:462
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q92759 Pfam ID:PF03849, PF18307
Protein Blast
Polymer Type:polypeptide(L)
Molecule:CDK-activating kinase assembly factor MAT1
Gene (Uniprot):MNAT1
Chain IDs:SA (auth: HD)
Chain Length:309
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P51948 Pfam ID:PF17121, PF06391
Protein Blast
Polymer Type:polypeptide(L)
Molecule:General transcription factor IIH subunit 3
Gene (Uniprot):GTF2H3
Chain IDs:TA (auth: HE)
Chain Length:308
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q13889 Pfam ID:PF03850
Protein Blast
Polymer Type:polypeptide(L)
Molecule:General transcription factor IIH subunit 5
Gene (Uniprot):GTF2H5
Chain IDs:WA (auth: HF)
Chain Length:71
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q6ZYL4 Pfam ID:PF06331
Protein Blast
Polymer Type:polypeptide(L)
Molecule:General transcription factor IIH subunit 2
Gene (Uniprot):GTF2H2
Chain IDs:UA (auth: HG)
Chain Length:395
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q13888 Pfam ID:PF04056, PF07975
Protein Blast
Polymer Type:polypeptide(L)
Molecule:General transcription and DNA repair factor IIH helicase subunit XPB
Gene (Uniprot):ERCC3
Chain IDs:VA (auth: HH)
Chain Length:782
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P19447 Pfam ID:PF13625, PF04851, PF16203
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Cyclin-dependent kinase 7
Gene (Uniprot):CDK7
Mutations:K41A
Chain IDs:XA (auth: HI)
Chain Length:346
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P50613 Pfam ID:PF00069 EC:2.7.11.22
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Cyclin-H
Gene (Uniprot):CCNH
Chain IDs:YA (auth: HJ)
Chain Length:323
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P51946 Pfam ID:PF00134, PF16899
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Histone H3
Gene (Uniprot):LOC121398065
Chain IDs:H (auth: NA), BC (auth: NE)
Chain Length:136
Number of Molecules:2
Biological Source:Xenopus laevis
UniProt ID:A0A310TTQ1 Pfam ID:PF00125
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Histone H4
Chain IDs:N (auth: NB), CC (auth: NF)
Chain Length:103
Number of Molecules:2
Biological Source:Xenopus laevis
UniProt ID:P62799 Pfam ID:PF15511
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Histone H2B
Gene (Uniprot):LOC108704303
Chain IDs:FC (auth: ND), GC (auth: NH)
Chain Length:126
Number of Molecules:2
Biological Source:Xenopus laevis
UniProt ID:A0A8J0U496 Pfam ID:PF00125
Polymer Type:polypeptide(L)
Molecule:HISTONE H2A.Z
Chain IDs:DC (auth: NG), EC (auth: NC)
Chain Length:128
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (162-mer)
Chain IDs:HC (auth: NX)
Chain Length:162
Number of Molecules:1
Biological Source:synthetic construct
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (162-mer)
Chain IDs:IC (auth: NY)
Chain Length:162
Number of Molecules:1
Biological Source:synthetic construct
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase subunit
Gene (Uniprot):POLR2A
Chain IDs:I (auth: PA)
Chain Length:1970
Number of Molecules:1
Biological Source:Sus scrofa
UniProt ID:A0A8D1DPV6 Pfam ID:PF04997, PF00623, PF04983, PF05000, PF04998, PF04992, PF04990, PF05001
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase subunit beta
Chain IDs:O (auth: PB)
Chain Length:1174
Number of Molecules:1
Biological Source:Sus scrofa
UniProt ID:A0A4X1TVZ5 Pfam ID:PF04563, PF04561, PF04565, PF04566, PF04567, PF00562, PF04560
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase II subunit RPB3
Gene (Uniprot):POLR2C
Chain IDs:Q (auth: PC)
Chain Length:275
Number of Molecules:1
Biological Source:Sus scrofa
UniProt ID:I3LCH3 Pfam ID:PF01193, PF01000
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase II subunit RPB4
Chain IDs:ZA (auth: PD)
Chain Length:142
Number of Molecules:1
Biological Source:Sus scrofa
UniProt ID:A0A481BYI6 Pfam ID:PF03874
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase II subunit E
Gene (Uniprot):POLR2E
Chain IDs:R (auth: PE)
Chain Length:210
Number of Molecules:1
Biological Source:Sus scrofa
UniProt ID:A0A4X1VTX4 Pfam ID:PF03871, PF01191
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase II subunit F
Gene (Uniprot):POLR2F
Chain IDs:S (auth: PF)
Chain Length:127
Number of Molecules:1
Biological Source:Sus scrofa
UniProt ID:A0A4X1VEK9 Pfam ID:PF01192
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase II subunit RPB7
Gene (Uniprot):POLR2G
Chain IDs:AB (auth: PG)
Chain Length:172
Number of Molecules:1
Biological Source:Sus scrofa
UniProt ID:A0A4X1VKG7 Pfam ID:PF03876, PF00575
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerases I, II, and III subunit RPABC3
Chain IDs:T (auth: PH)
Chain Length:150
Number of Molecules:1
Biological Source:Sus scrofa
UniProt ID:I3LCB2 Pfam ID:PF03870
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase II subunit RPB9
Gene (Uniprot):POLR2I
Chain IDs:U (auth: PI)
Chain Length:125
Number of Molecules:1
Biological Source:Sus scrofa
UniProt ID:P60899 Pfam ID:PF02150, PF01096
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerases I, II, and III subunit RPABC5
Gene (Uniprot):POLR2L
Chain IDs:V (auth: PJ)
Chain Length:67
Number of Molecules:1
Biological Source:Sus scrofa
UniProt ID:A0A493TD97 Pfam ID:PF01194
Protein Blast
Polymer Type:polypeptide(L)
Molecule:RNA_pol_L_2 domain-containing protein
Chain IDs:W (auth: PK)
Chain Length:117
Number of Molecules:1
Biological Source:Sus scrofa
UniProt ID:F1RKE4 Pfam ID:PF13656
Protein Blast
Polymer Type:polypeptide(L)
Molecule:RPB12
Gene (Uniprot):POLR2K
Chain IDs:X (auth: PL)
Chain Length:58
Number of Molecules:1
Biological Source:Sus scrofa
UniProt ID:A0A4X1TRS6 Pfam ID:PF03604
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (228-mer)
Chain IDs:A (auth: X)
Chain Length:989
Number of Molecules:1
Biological Source:synthetic construct
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (228-mer)
Chain IDs:B (auth: Y)
Chain Length:747
Number of Molecules:1
Biological Source:synthetic construct
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 1
Gene (Uniprot):MED1
Chain IDs:GB (auth: a)
Chain Length:1581
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q15648 Pfam ID:PF10744
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 29
Gene (Uniprot):MED29
Chain IDs:NB (auth: b)
Chain Length:200
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9NX70 Pfam ID:PF11568
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 27
Gene (Uniprot):MED27
Chain IDs:OB (auth: c)
Chain Length:311
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q6P2C8 Pfam ID:PF11571
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 4
Gene (Uniprot):MED4
Chain IDs:HB (auth: d)
Chain Length:270
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9NPJ6 Pfam ID:PF10018
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 28
Gene (Uniprot):MED28
Chain IDs:PB (auth: e)
Chain Length:178
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9H204 Pfam ID:PF11594
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 6
Gene (Uniprot):MED6
Chain IDs:IB (auth: f)
Chain Length:246
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:O75586 Pfam ID:PF04934
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 7
Gene (Uniprot):MED7
Chain IDs:BB (auth: g)
Chain Length:233
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:O43513 Pfam ID:PF05983
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Isoform 2 of Mediator of RNA polymerase II transcription subunit 8
Gene (Uniprot):MED8
Chain IDs:SB (auth: h)
Chain Length:268
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q96G25 Pfam ID:PF10232
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 9
Gene (Uniprot):MED9
Chain IDs:JB (auth: i)
Chain Length:146
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9NWA0 Pfam ID:PF07544
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 10
Gene (Uniprot):MED10
Chain IDs:CB (auth: j)
Chain Length:135
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9BTT4 Pfam ID:PF09748
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 11
Gene (Uniprot):MED11
Chain IDs:TB (auth: k)
Chain Length:117
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9P086 Pfam ID:PF10280
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 30
Gene (Uniprot):MED30
Chain IDs:QB (auth: l)
Chain Length:178
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q96HR3 Pfam ID:PF11315
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 31
Gene (Uniprot):MED31
Chain IDs:KB (auth: m)
Chain Length:131
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9Y3C7 Pfam ID:PF05669
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 14
Gene (Uniprot):MED14
Chain IDs:DB (auth: n)
Chain Length:1454
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:O60244 Pfam ID:PF08638, PF22981, PF22984, PF22983
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 15
Gene (Uniprot):MED15
Chain IDs:RB (auth: o)
Chain Length:788
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q96RN5 Pfam ID:PF09606, PF21538, PF21539
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Isoform 2 of Mediator of RNA polymerase II transcription subunit 16
Gene (Uniprot):MED16
Chain IDs:XB (auth: p)
Chain Length:841
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9Y2X0 Pfam ID:PF00400, PF11635, PF20718, PF20719
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 17
Gene (Uniprot):MED17
Chain IDs:LB (auth: q)
Chain Length:651
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9NVC6 Pfam ID:PF10156
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 18
Gene (Uniprot):MED18
Chain IDs:UB (auth: r)
Chain Length:208
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9BUE0 Pfam ID:PF09637
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 19
Gene (Uniprot):MED19
Chain IDs:EB (auth: s)
Chain Length:244
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:A0JLT2 Pfam ID:PF10278
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 20
Gene (Uniprot):MED20
Chain IDs:VB (auth: t)
Chain Length:212
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9H944 Pfam ID:PF08612
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 21
Gene (Uniprot):MED21
Chain IDs:FB (auth: u)
Chain Length:144
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q13503 Pfam ID:PF11221
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 22
Gene (Uniprot):MED22
Chain IDs:WB (auth: v)
Chain Length:200
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q15528 Pfam ID:PF06179
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 23
Gene (Uniprot):MED23
Chain IDs:YB (auth: w)
Chain Length:1368
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9ULK4 Pfam ID:PF11573
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 24
Gene (Uniprot):MED24
Chain IDs:ZB (auth: x)
Chain Length:989
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:O75448 Pfam ID:PF11277
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 25
Gene (Uniprot):MED25
Chain IDs:AC (auth: y)
Chain Length:747
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q71SY5 Pfam ID:PF11265, PF11235, PF11232
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 26
Gene (Uniprot):MED26
Chain IDs:MB (auth: z)
Chain Length:600
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:O95402 Pfam ID:PF08711, PF15694, PF15693
Ligand Molecules
MG
SF4
ZN
Primary Citation
Structures of +1 nucleosome-bound PIC-Mediator complex.
Science 378 62 68 (2022)
PMID: 36201575 DOI: 10.1126/science.abn8131

Abstact

RNA polymerase II-mediated eukaryotic transcription starts with the assembly of the preinitiation complex (PIC) on core promoters. The +1 nucleosome is well positioned about 40 base pairs downstream of the transcription start site (TSS) and is commonly known as a barrier of transcription. The +1 nucleosome-bound PIC-Mediator structures show that PIC-Mediator prefers binding to T40N nucleosome located 40 base pairs downstream of TSS and contacts T50N but not the T70N nucleosome. The nucleosome facilitates the organization of PIC-Mediator on the promoter by binding TFIIH subunit p52 and Mediator subunits MED19 and MED26 and may contribute to transcription initiation. PIC-Mediator exhibits multiple nucleosome-binding patterns, supporting a structural role of the +1 nucleosome in the coordination of PIC-Mediator assembly. Our study reveals the molecular mechanism of PIC-Mediator organization on chromatin and underscores the significance of the +1 nucleosome in regulating transcription initiation.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
8GXS