Structure analysis

Cryo-EM structure of 90S small subunit preribosomes in transition states (State A)

Electron Microscopy
3.2Å resolution
Assembly composition:
hetero 73-mer (preferred)
Entry contents: 66 distinct polypeptide molecules
3 distinct RNA molecules

Assemblies

Assembly 1 (preferred)
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Multimeric state: hetero 73-mer
PDBe Complex ID: PDB-CPX-126871

Macromolecules

Chain: SC
Length: 255 amino acids
Theoretical weight: 28.8 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P33442 (Residues: 1-255; Coverage: 100%)
Gene names: L9753.9, PLC1, RPS10A, RPS1A, YLR441C
Pfam: Ribosomal S3Ae family
InterPro:

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Chain: SH
Length: 236 amino acids
Theoretical weight: 27.05 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P0CX37 (Residues: 1-236; Coverage: 100%)
Gene names: LPG18C, RPS101, RPS10B, RPS6A, YPL090C
Pfam: Ribosomal protein S6e
InterPro:

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Chain: SI
Length: 190 amino acids
Theoretical weight: 21.66 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P26786 (Residues: 1-190; Coverage: 100%)
Gene names: RPS30, RPS7A, YOR096W, YOR3177W
Pfam: Ribosomal protein S7e
InterPro:

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Chain: SP
Length: 137 amino acids
Theoretical weight: 14.56 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P06367 (Residues: 1-137; Coverage: 100%)
Gene names: CRY1, RPL59, RPS14A, YCR031C, YCR31C
Pfam: Ribosomal protein S11
InterPro:

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Chain: SX
Length: 130 amino acids
Theoretical weight: 14.65 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q3E7Y3 (Residues: 1-130; Coverage: 100%)
Gene names: L8039.6, RPS22B, RPS24B, YLR367W
Pfam: Ribosomal protein S8
InterPro:

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Chain: SY
Length: 145 amino acids
Theoretical weight: 16.07 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P0CX29 (Residues: 1-145; Coverage: 100%)
Gene names: G6178, RPS23A, RPS28A, YGR118W
Pfam: Ribosomal protein S12/S23
InterPro:

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Chain: SZ
Length: 135 amino acids
Theoretical weight: 15.36 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P0CX31 (Residues: 1-135; Coverage: 100%)
Gene names: RPS24A, RPS24EA, YER074W
Pfam: Ribosomal protein S24e
InterPro:

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Chain: Sc
Length: 82 amino acids
Theoretical weight: 8.89 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P35997 (Residues: 1-82; Coverage: 100%)
Gene names: RPS27A, YKL156W
Pfam: Ribosomal protein S27
InterPro:

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Chain: Sd
Length: 67 amino acids
Theoretical weight: 7.61 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q3E7X9 (Residues: 1-67; Coverage: 100%)
Gene names: O3600, RPS28A, RPS33, RPS33A, YOR167C
Pfam: Ribosomal protein S28e
InterPro:

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Chains: 3B, 3C
Length: 327 amino acids
Theoretical weight: 34.53 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P15646 (Residues: 1-327; Coverage: 100%)
Gene names: D2870, LOT3, NOP1, YDL014W
Pfam: Fibrillarin
InterPro:

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Chain: 3D
Length: 504 amino acids
Theoretical weight: 56.96 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q12460 (Residues: 1-504; Coverage: 100%)
Gene names: L8167.9, NOP56, SIK1, YLR197W
Pfam:
InterPro:

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Chain: 3E
Length: 511 amino acids
Theoretical weight: 57.06 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q12499 (Residues: 1-511; Coverage: 100%)
Gene names: NOP5, NOP58, O6108, YOR310C
Pfam:
InterPro:

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Chain: 3F
Length: 573 amino acids
Theoretical weight: 65.15 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q06506 (Residues: 1-573; Coverage: 100%)
Gene names: RRP9, YPR137W
Pfam: WD domain, G-beta repeat
InterPro:

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Chain: A4
Length: 776 amino acids
Theoretical weight: 87.91 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q06679 (Residues: 1-776; Coverage: 100%)
Gene names: UTP4, YDR324C
Pfam: WD domain, G-beta repeat
InterPro:

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Chain: A5
Length: 643 amino acids
Theoretical weight: 72.08 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q04177 (Residues: 1-643; Coverage: 100%)
Gene names: D9509.17, UTP5, YDR398W
Pfam: Dip2/Utp12 Family
InterPro:

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Chain: A8
Length: 713 amino acids
Theoretical weight: 80.27 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P53276 (Residues: 1-713; Coverage: 100%)
Gene names: UTP8, YGR128C
Pfam: Utp8 family
InterPro: U3 small nucleolar RNA-associated protein 8

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Chain: A9
Length: 575 amino acids
Theoretical weight: 65.35 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P38882 (Residues: 1-575; Coverage: 100%)
Gene names: UTP9, YHR196W
InterPro: WD40/YVTN repeat-like-containing domain superfamily

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Chain: AG
Length: 896 amino acids
Theoretical weight: 101.34 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q02931 (Residues: 1-896; Coverage: 100%)
Gene names: NAN1, UTP17, YPL126W
Pfam: WD domain, G-beta repeat
InterPro:

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Chain: B8
Length: 594 amino acids
Theoretical weight: 66.49 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P40362 (Residues: 1-594; Coverage: 100%)
Gene names: HRE594, J1098, UTP18, YJL069C
Pfam: WD domain, G-beta repeat
InterPro:

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Chain: B6
Length: 440 amino acids
Theoretical weight: 52.5 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q02354 (Residues: 1-440; Coverage: 100%)
Gene names: D9461.34, UTP6, YDR449C
Pfam: U3 small nucleolar RNA-associated protein 6
InterPro:

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Chain: 5B
Length: 214 amino acids
Theoretical weight: 24.43 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q08492 (Residues: 1-214; Coverage: 100%)
Gene names: BUD21, UTP16, YOR078W, YOR29-29
Pfam: U3 snoRNA associated
InterPro: U3 small nucleolar RNA-associated protein 16

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Chain: 5D
Length: 250 amino acids
Theoretical weight: 29.81 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P34247 (Residues: 1-250; Coverage: 100%)
Gene names: UTP11, YKL099C, YKL449
Pfam: Utp11 protein
InterPro: Small-subunit processome, Utp11

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Chain: 5E
Length: 593 amino acids
Theoretical weight: 67.04 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P47083 (Residues: 1-593; Coverage: 100%)
Gene names: J1411, MPP10, YJR002W, YJR83.5
Pfam: Mpp10 protein
InterPro: U3 small nucleolar ribonucleoprotein complex, subunit Mpp10

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Chain: 5F
Length: 183 amino acids
Theoretical weight: 21.93 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P32899 (Residues: 1-183; Coverage: 100%)
Gene names: IMP3, YHR148W
Pfam:
InterPro:

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Chain: 5G
Length: 290 amino acids
Theoretical weight: 33.54 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P53941 (Residues: 1-290; Coverage: 100%)
Gene names: IMP4, N2353, YNL075W
Pfam: Brix domain
InterPro:

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Chain: 5H
Length: 610 amino acids
Theoretical weight: 70.36 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q12136 (Residues: 1-610; Coverage: 100%)
Gene names: D1545, SAS10, UTP3, YDL153C
Pfam:
InterPro:

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Chain: 5I
Length: 489 amino acids
Theoretical weight: 56.89 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P33750 (Residues: 1-489; Coverage: 100%)
Gene names: L1339, SOF1, YLL011W
Pfam:
InterPro:

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Chain: 5J
Length: 217 amino acids
Theoretical weight: 25.69 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q12035 (Residues: 1-217; Coverage: 100%)
Gene names: FCF2, L2128, YLR051C
Pfam: Fcf2 pre-rRNA processing
InterPro:

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Chain: 5K
Length: 189 amino acids
Theoretical weight: 21.65 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q05498 (Residues: 1-189; Coverage: 100%)
Gene names: D9651.9, FCF1, YDR339C
Pfam: Fcf1
InterPro:

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Chain: RA
Length: 707 amino acids
Theoretical weight: 81.86 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P48234 (Residues: 1-707; Coverage: 100%)
Gene names: ENP2, G6623, YGR145W
Pfam: NUC153 domain
InterPro:

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Chain: RB
Length: 357 amino acids
Theoretical weight: 40.86 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P40079 (Residues: 1-357; Coverage: 100%)
Gene names: LCP5, SYGP-ORF43, YER127W
Pfam: Sas10/Utp3/C1D family
InterPro: Sas10/Utp3/C1D

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Chains: RG, RH
Length: 252 amino acids
Theoretical weight: 27.94 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q06287 (Residues: 1-252; Coverage: 100%)
Gene names: EMG1, L9470.5, NEP1, YLR186W
Pfam: EMG1/NEP1 methyltransferase
InterPro:

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Chain: RI
Length: 274 amino acids
Theoretical weight: 31.67 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P36144 (Residues: 1-274; Coverage: 100%)
Gene names: UTP30, YKR060W
Pfam: Ribosomal protein L1p/L10e family
InterPro:

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Chain: RN
Length: 810 amino acids
Theoretical weight: 94.46 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q99207 (Residues: 1-810; Coverage: 100%)
Gene names: D1566, NOP14, UTP2, YDL148C
Pfam: Nop14-like family
InterPro: Nucleolar protein 14

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Chain: RO
Length: 552 amino acids
Theoretical weight: 63.71 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q06512 (Residues: 1-552; Coverage: 100%)
Gene names: NOC4, UTP19, YPR144C
Pfam: CBF/Mak21 family
InterPro:

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Chain: RQ
Length: 899 amino acids
Theoretical weight: 103.19 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: Q04500 (Residues: 1-899; Coverage: 100%)
Gene names: UTP14, YML093W
Pfam: Utp14 protein
InterPro: Small-subunit processome, Utp14

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Chain: RS
Length: 483 amino acids
Theoretical weight: 55.21 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P38333 (Residues: 1-483; Coverage: 100%)
Gene names: ENP1, MEG1, YBR1635, YBR247C
Pfam: Bystin
InterPro: Bystin

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Chain: RT
Length: 326 amino acids
Theoretical weight: 36.36 KDa
Source organism: Saccharomyces cerevisiae S288C
InterPro:

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Chain: RV
Length: 346 amino acids
Theoretical weight: 38.96 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P40546 (Residues: 1-346; Coverage: 100%)
Gene names: FAF1, YIL019W

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Chain: RW
Length: 206 amino acids
Theoretical weight: 23.9 KDa
Source organism: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P40470 (Residues: 1-206; Coverage: 100%)
Gene names: RRT14, YIL127C
Pfam: Regular of rDNA transcription protein 14
InterPro: Regulator of rDNA transcription 14

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Chain: X1
Length: 347 amino acids
Theoretical weight: 29.55 KDa
Source organism: Saccharomyces cerevisiae S288C

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Name: U3 snoRNA
Representative chains: 3A
Length: 333 nucleotides
Theoretical weight: 106.5 KDa
Rfam: Fungal small nucleolar RNA U3

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Name: 5' ETS
Representative chains: 5A
Length: 700 nucleotides
Theoretical weight: 225.54 KDa

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Name: 18S pre-rRNA
Representative chains: SA
Length: 1808 nucleotides
Theoretical weight: 582.38 KDa
Rfam: Eukaryotic small subunit ribosomal RNA

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