9HM0 image
Deposition Date 2024-12-06
Release Date 2025-12-17
Last Version Date 2025-12-17
Entry Detail
PDB ID:
9HM0
Keywords:
RIBOSOME
Title:
Translational activator Aep3 in complex with mRNA and the yeast mitochondrial ribosome
Biological Source:
Source Organism(s):
Saccharomyces cerevisiae W303 (Taxon ID: 580240)
Saccharomyces cerevisiae (Taxon ID: 4932)
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
3.00 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
9HM0 validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein bL36m
Gene (Uniprot):RTC6
Chain IDs:JA (auth: 00)
Chain Length:93
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:O14464 Pfam ID:PF00444
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS38
Gene (Uniprot):QRI5
Chain IDs:A (auth: 1)
Chain Length:111
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P32344 Pfam ID:PF08213
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein mL38
Gene (Uniprot):MRPL35
Chain IDs:KA (auth: 11)
Chain Length:367
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q06678 Pfam ID:PF01161
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS41
Gene (Uniprot):FYV4
Chain IDs:B (auth: 2)
Chain Length:130
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P38783 Pfam ID:PF09597
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein mL40
Gene (Uniprot):MRPL28
Chain IDs:LA (auth: 22)
Chain Length:147
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P36527 Pfam ID:PF09812
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS42
Gene (Uniprot):RSM26
Chain IDs:C (auth: 3)
Chain Length:266
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P47141 Pfam ID:PF02777
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein mL41
Gene (Uniprot):MRPL27
Chain IDs:MA (auth: 33)
Chain Length:146
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae
UniProt ID:P36526 Pfam ID:PF09809
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS43
Gene (Uniprot):MRP1
Chain IDs:D (auth: 4)
Chain Length:321
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P10662 Pfam ID:PF02777
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein mL43
Gene (Uniprot):MRPL51
Chain IDs:NA (auth: 44)
Chain Length:140
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q06090 Pfam ID:PF05047
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS27
Gene (Uniprot):MRP13
Chain IDs:E (auth: 5)
Chain Length:339
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P12686
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein mL44
Gene (Uniprot):MRPL3
Chain IDs:OA (auth: 55)
Chain Length:390
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P36516 Pfam ID:PF00636, PF00035, PF22892
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS45
Gene (Uniprot):MRPS35
Chain IDs:F (auth: 6)
Chain Length:345
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P53292 Pfam ID:PF12298
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein mL46
Gene (Uniprot):MRPL17
Chain IDs:PA (auth: 66)
Chain Length:281
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P36528 Pfam ID:PF11788
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS46
Gene (Uniprot):RSM28
Chain IDs:G (auth: 7)
Chain Length:361
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q03430
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein mL49
Gene (Uniprot):IMG2
Chain IDs:QA (auth: 77)
Chain Length:146
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P25642 Pfam ID:PF05046
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS47
Gene (Uniprot):EHD3
Chain IDs:H (auth: 8)
Chain Length:500
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P28817 Pfam ID:PF16113
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein mL50
Gene (Uniprot):MRPL13
Chain IDs:RA (auth: 88)
Chain Length:264
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q02204 Pfam ID:PF10501
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein mL57
Gene (Uniprot):MRPL15
Chain IDs:SA (auth: 99)
Chain Length:253
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P36523 Pfam ID:PF00636
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein bS1m
Gene (Uniprot):MRP51
Chain IDs:I (auth: A)
Chain Length:344
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q02950 Pfam ID:PF11709
Polymer Type:polyribonucleotide
Molecule:21S mitochondrial rRNA
Chain IDs:TA (auth: AA)
Chain Length:195
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS2m
Gene (Uniprot):MRP4
Chain IDs:J (auth: B)
Chain Length:394
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P32902 Pfam ID:PF00318
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL2m
Gene (Uniprot):RML2
Chain IDs:UA (auth: BB)
Chain Length:157
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P32611 Pfam ID:PF00181, PF03947
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS3m
Gene (Uniprot):VAR1
Chain IDs:K (auth: C)
Chain Length:398
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P02381 Pfam ID:PF05316
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL3m
Gene (Uniprot):MRPL9
Chain IDs:VA (auth: CC)
Chain Length:131
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P31334 Pfam ID:PF00297
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS4m
Gene (Uniprot):NAM9
Chain IDs:L (auth: D)
Chain Length:486
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P27929 Pfam ID:PF01479
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL4m
Gene (Uniprot):YML6
Chain IDs:WA (auth: DD)
Chain Length:286
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P51998 Pfam ID:PF00573
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS5m
Gene (Uniprot):MRPS5
Chain IDs:M (auth: E)
Chain Length:307
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P33759 Pfam ID:PF00333, PF03719
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL5m
Gene (Uniprot):MRPL7
Chain IDs:XA (auth: EE)
Chain Length:292
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P36519 Pfam ID:PF00281, PF00673
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein bS6m
Gene (Uniprot):MRP17
Chain IDs:N (auth: F)
Chain Length:131
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P28778 Pfam ID:PF01250
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL6m
Gene (Uniprot):MRPL6
Chain IDs:YA (auth: FF)
Chain Length:214
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P32904 Pfam ID:PF00347
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS7m
Gene (Uniprot):RSM7
Chain IDs:O (auth: G)
Chain Length:247
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P47150 Pfam ID:PF00177
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein bL9m
Gene (Uniprot):MRPL50
Chain IDs:ZA (auth: GG)
Chain Length:139
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P53724
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS8m
Gene (Uniprot):MRPS8
Chain IDs:P (auth: H)
Chain Length:155
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q03799 Pfam ID:PF00410
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL13m
Gene (Uniprot):MRPL23
Chain IDs:AB (auth: HH)
Chain Length:163
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q12487 Pfam ID:PF00572
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS9m
Gene (Uniprot):MRPS9
Chain IDs:Q (auth: I)
Chain Length:278
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P38120 Pfam ID:PF00380
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL14m
Gene (Uniprot):MRPL38
Chain IDs:BB (auth: II)
Chain Length:138
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P35996 Pfam ID:PF00238
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS10m
Gene (Uniprot):RSM10
Chain IDs:R (auth: J)
Chain Length:203
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q03201 Pfam ID:PF00338
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL15m
Gene (Uniprot):MRPL10
Chain IDs:CB (auth: JJ)
Chain Length:322
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P36520 Pfam ID:PF00828
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS11m
Gene (Uniprot):MRPS18
Chain IDs:S (auth: K)
Chain Length:217
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P42847
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL16m
Gene (Uniprot):MRPL16
Chain IDs:DB (auth: KK)
Chain Length:232
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P38064 Pfam ID:PF00252
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS12m
Gene (Uniprot):MRPS12
Chain IDs:T (auth: L)
Chain Length:153
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P53732 Pfam ID:PF00164
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein bL17m
Gene (Uniprot):MRPL8
Chain IDs:EB (auth: LL)
Chain Length:238
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P22353 Pfam ID:PF01196, PF18502
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS13m
Gene (Uniprot):SWS2
Chain IDs:U (auth: M)
Chain Length:143
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P53937 Pfam ID:PF00416
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein bL19m
Gene (Uniprot):IMG1
Chain IDs:FB (auth: MM)
Chain Length:169
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P25626 Pfam ID:PF01245
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS14m
Gene (Uniprot):MRP2
Chain IDs:V (auth: N)
Chain Length:115
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P10663 Pfam ID:PF00253
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein bL21m
Gene (Uniprot):MRPL49
Chain IDs:GB (auth: NN)
Chain Length:161
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P40858 Pfam ID:PF00829
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS15m
Gene (Uniprot):MRPS28
Chain IDs:W (auth: O)
Chain Length:286
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P21771 Pfam ID:PF00312
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL22m
Gene (Uniprot):MRPL22
Chain IDs:HB (auth: OO)
Chain Length:309
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P53881 Pfam ID:PF00237
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein bS16m
Gene (Uniprot):MRPS16
Chain IDs:X (auth: P)
Chain Length:121
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q02608 Pfam ID:PF00886
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL23m
Chain IDs:IB (auth: PP)
Chain Length:263
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS17m
Gene (Uniprot):MRPS17
Chain IDs:Y (auth: Q)
Chain Length:237
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q03246 Pfam ID:PF00366
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL24m
Gene (Uniprot):MRPL40
Chain IDs:JB (auth: QQ)
Chain Length:297
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P36534 Pfam ID:PF22682, PF00467
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein bS18m
Gene (Uniprot):RSM18
Chain IDs:Z (auth: R)
Chain Length:1649
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P40033 Pfam ID:PF01084
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein bL27m
Gene (Uniprot):MRP7
Chain IDs:KB (auth: RR)
Chain Length:371
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P12687 Pfam ID:PF01016, PF18471
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein uS19m
Gene (Uniprot):RSM19
Chain IDs:AA (auth: S)
Chain Length:91
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P53733 Pfam ID:PF00203
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein bL28m
Gene (Uniprot):MRPL24
Chain IDs:LB (auth: SS)
Chain Length:258
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P36525 Pfam ID:PF00830
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein bS21m
Gene (Uniprot):MRP21
Chain IDs:BA (auth: T)
Chain Length:177
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P38175 Pfam ID:PF01165
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL29m
Gene (Uniprot):MRPL4
Chain IDs:MB (auth: TT)
Chain Length:319
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P36517 Pfam ID:PF06984
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS23
Gene (Uniprot):RSM25
Chain IDs:CA (auth: U)
Chain Length:264
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P40496 Pfam ID:PF13741
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein uL30m
Gene (Uniprot):MRPL33
Chain IDs:NB (auth: UU)
Chain Length:86
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P20084 Pfam ID:PF00327
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS26
Gene (Uniprot):PET123
Chain IDs:OB (auth: V)
Chain Length:318
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P17558 Pfam ID:PF26163
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein bL31m
Gene (Uniprot):MRPL36
Chain IDs:PB (auth: VV)
Chain Length:177
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P36531 Pfam ID:PF21492
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS29
Gene (Uniprot):RSM23
Chain IDs:DA (auth: W)
Chain Length:450
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q01163 Pfam ID:PF10236
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein bL32m
Gene (Uniprot):MRPL32
Chain IDs:QB (auth: WW)
Chain Length:183
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P25348 Pfam ID:PF01783
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS33
Gene (Uniprot):RSM27
Chain IDs:EA (auth: X)
Chain Length:110
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P53305 Pfam ID:PF08293
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein bL33m
Gene (Uniprot):MRPL39
Chain IDs:RB (auth: XX)
Chain Length:70
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P36533
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS35
Gene (Uniprot):RSM24
Chain IDs:FA (auth: Y)
Chain Length:319
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q03976 Pfam ID:PF10213
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein bL34m
Gene (Uniprot):YD9727.10
Chain IDs:SB (auth: YY)
Chain Length:105
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q04598 Pfam ID:PF00468
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Small ribosomal subunit protein mS37
Gene (Uniprot):MRP10
Chain IDs:GA (auth: Z)
Chain Length:95
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:O75012 Pfam ID:PF06747
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein bL35m
Gene (Uniprot):MRP35
Chain IDs:TB (auth: ZZ)
Chain Length:115
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P53921 Pfam ID:PF01632
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:ATPase expression protein 3
Gene (Uniprot):AEP3
Chain IDs:HA (auth: a)
Chain Length:344
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q12089 Pfam ID:PF13812
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein mL58
Gene (Uniprot):MRPL20
Chain IDs:UB (auth: aa)
Chain Length:195
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P22354 Pfam ID:PF12824
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein mL59
Gene (Uniprot):MRPL25
Chain IDs:VB (auth: bb)
Chain Length:157
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P23369 Pfam ID:PF18126
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein mL60
Gene (Uniprot):MRPL31
Chain IDs:WB (auth: cc)
Chain Length:131
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P14063 Pfam ID:PF09784
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large ribosomal subunit protein mL67
Gene (Uniprot):MHR1
Chain IDs:XB (auth: dd)
Chain Length:286
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:Q06630 Pfam ID:PF12829
Polymer Type:polyribonucleotide
Molecule:15S mitochondrial rRNA
Chain IDs:YB (auth: r)
Chain Length:1649
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
Polymer Type:polyribonucleotide
Molecule:E/E-site formyl-methionine tRNA
Chain IDs:IA (auth: t)
Chain Length:177
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
Ligand Molecules
GTP
MG
Primary Citation
Translational activators align mRNAs at the small mitoribosomal subunit for translation initiation.
Nat.Struct.Mol.Biol. ? ? ? (2025)
PMID: 41339860 DOI: 10.1038/s41594-025-01726-y

Abstact

Mitochondrial gene expression is essential for oxidative phosphorylation. Mitochondrial-encoded mRNAs are translated by dedicated mitochondrial ribosomes (mitoribosomes), whose regulation remains elusive. In Saccharomyces cerevisiae, nuclear-encoded mitochondrial translational activators (TAs) facilitate transcript-specific translation by a yet unknown mechanism. Here, we investigated the function of TAs containing RNA-binding pentatricopeptide repeats using selective mitoribosome profiling and cryo-electron microscopy (cryo-EM) structural analysis. These analyses show that TAs exhibit strong selectivity for mitoribosomes initiating on their target transcripts. Moreover, TA-mitoribosome footprints indicate that TAs recruit mitoribosomes proximal to the start codon. Two cryo-EM structures of mRNA-TA complexes bound to mitoribosomes stalled in the post-initiation, pre-elongation state revealed the general mechanism of TA action. Specifically, the TAs bind to structural elements in the 5' untranslated region of the client mRNA and the mRNA channel exit to align the mRNA in the small subunit during initiation. Our findings provide a mechanistic basis for understanding how mitochondria achieve transcript-specific translation initiation without relying on general sequence elements to position mitoribosomes at start codons.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
9HM0
Feedback Form
Name
Email
Institute
Feedback