7PUB image
Deposition Date 2021-09-29
Release Date 2022-05-04
Last Version Date 2024-11-20
Entry Detail
PDB ID:
7PUB
Keywords:
RIBOSOME
Title:
Late assembly intermediate of the Trypanosoma brucei mitoribosomal small subunit
Biological Source:
Source Organism:
Trypanosoma brucei brucei (Taxon ID: 5702)
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
3.70 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
7PUB validation report
Macromolecular Entities
Polymer Type:polyribonucleotide
Molecule:9S rRNA
Chain IDs:A (auth: CA)
Chain Length:602
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:uS3m
Chain IDs:B (auth: CC)
Chain Length:74
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ribosomal_S5_C domain-containing protein
Gene (Uniprot):Tb10.70.0530
Chain IDs:C (auth: CE)
Chain Length:435
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38AX6 Pfam ID:PF03719
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:bS6m
Gene (Uniprot):Tb10.70.4850
Chain IDs:D (auth: CF)
Chain Length:160
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38BW5
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S8, putative
Gene (Uniprot):Tb10.389.0130
Chain IDs:E (auth: CH)
Chain Length:282
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q388R7 Pfam ID:PF00410
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:uS9m
Gene (Uniprot):Tb08.28F14.630
Chain IDs:F (auth: CI)
Chain Length:443
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57W62 Pfam ID:PF00380
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:LysM domain-containing protein
Gene (Uniprot):Tb05.45E22.300
Chain IDs:G (auth: CJ)
Chain Length:817
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57Z45 Pfam ID:PF01476
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:uS11m
Gene (Uniprot):Tb10.406.0510
Chain IDs:H (auth: CK)
Chain Length:874
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q389T7
Polymer Type:polypeptide(L)
Molecule:uS12m
Chain IDs:I (auth: CL)
Chain Length:87
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:uS14m
Gene (Uniprot):Tb08.29O9.64
Chain IDs:J (auth: CN)
Chain Length:250
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q580I0
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:uS15m
Gene (Uniprot):TB927.1.1200
Chain IDs:K (auth: CO)
Chain Length:429
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q4GZ99
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:bS16m
Gene (Uniprot):Tb11.02.5670
Chain IDs:L (auth: CP)
Chain Length:188
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q384N9
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S Ribosomal protein S17, putative
Gene (Uniprot):Tb09.211.2580
Chain IDs:M (auth: CQ)
Chain Length:307
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38DP8 Pfam ID:PF00366
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:bS18m
Gene (Uniprot):Tb10.6k15.3900
Chain IDs:N (auth: CR)
Chain Length:320
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38AS2
Polymer Type:polypeptide(L)
Molecule:uS19m
Chain IDs:O (auth: CS)
Chain Length:244
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:bS21m
Gene (Uniprot):Tb03.26J7.200
Chain IDs:P (auth: CU)
Chain Length:193
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q580M9
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS22
Gene (Uniprot):Tb09.211.2430
Chain IDs:Q (auth: Ca)
Chain Length:602
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38DR3
Polymer Type:polypeptide(L)
Molecule:mS23
Chain IDs:R (auth: Cb)
Chain Length:325
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS26
Gene (Uniprot):Tb09.211.3000
Chain IDs:S (auth: Cd)
Chain Length:440
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38DK6
Polymer Type:polypeptide(L)
Molecule:mS29
Chain IDs:T (auth: Cg)
Chain Length:498
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS33
Gene (Uniprot):Tb03.27F10.720
Chain IDs:U (auth: Ci)
Chain Length:443
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57WW0
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS34
Gene (Uniprot):Tb08.5H5.370
Chain IDs:V (auth: Cj)
Chain Length:817
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57UK0
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS35
Gene (Uniprot):Tb11.47.0024
Chain IDs:W (auth: Ck)
Chain Length:874
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q387C7
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS37
Gene (Uniprot):Tb10.70.6600
Chain IDs:X (auth: Cm)
Chain Length:215
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38C96
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS38
Gene (Uniprot):Tb07.29K4.740
Chain IDs:Y (auth: Cn)
Chain Length:250
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57VQ9
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Protein FYV4, mitochondrial
Gene (Uniprot):Tb10.26.0750
Chain IDs:Z (auth: Cp)
Chain Length:188
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q389L3
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Superoxide dismutase, putative
Gene (Uniprot):Tb06.4F7.290
Chain IDs:AA (auth: Cq)
Chain Length:307
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q586A1 Pfam ID:PF02777
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Sod_Fe_C domain-containing protein
Gene (Uniprot):Tb04.26G5.610
Chain IDs:BA (auth: Cr)
Chain Length:320
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q585I1 Pfam ID:PF02777
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:ECH_2 domain-containing protein
Gene (Uniprot):Tb11.01.1910
Chain IDs:CA (auth: Cv)
Chain Length:1211
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q383R4 Pfam ID:PF16113
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS48
Gene (Uniprot):Tb08.5H5.480
Chain IDs:DA
Chain Length:64
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57UJ2
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS49
Gene (Uniprot):30M24.380
Chain IDs:EA (auth: DB)
Chain Length:1181
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q586P5
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS50
Gene (Uniprot):Tb07.13M20.300
Chain IDs:FA (auth: DC)
Chain Length:1165
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57YB5
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS51
Gene (Uniprot):Tb11.02.3180
Chain IDs:GA (auth: DD)
Chain Length:812
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q385L8
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS52
Gene (Uniprot):Tb11.02.0130
Chain IDs:HA (auth: DE)
Chain Length:747
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q386Q7
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS53
Gene (Uniprot):Tb09.160.4750
Chain IDs:IA (auth: DF)
Chain Length:666
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38ET1
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS54
Gene (Uniprot):Tb05.1P6.750
Chain IDs:JA (auth: DG)
Chain Length:631
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57ZP8
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS55
Gene (Uniprot):Tb03.5L5.360
Chain IDs:KA (auth: DH)
Chain Length:581
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q580V1
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS56
Gene (Uniprot):Tb06.26G9.580
Chain IDs:LA (auth: DI)
Chain Length:407
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q587C2
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS57
Gene (Uniprot):Tb06.4M18.330
Chain IDs:MA (auth: DJ)
Chain Length:396
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q584U8
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS58
Gene (Uniprot):Tb10.70.3840
Chain IDs:NA (auth: DK)
Chain Length:324
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38BP1
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS59
Gene (Uniprot):Tb10.70.4220
Chain IDs:OA (auth: DL)
Chain Length:307
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38BS2
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS60
Gene (Uniprot):Tb07.22O10.790
Chain IDs:PA (auth: DM)
Chain Length:294
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57XL2
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS61
Gene (Uniprot):Tb09.211.4510
Chain IDs:QA (auth: DN)
Chain Length:293
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38D60
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS62
Gene (Uniprot):Tb11.01.3300
Chain IDs:RA (auth: DO)
Chain Length:282
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q383D1
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS63
Gene (Uniprot):Tb09.160.3800
Chain IDs:SA (auth: DP)
Chain Length:274
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38F25
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:AKAP7_NLS domain-containing protein
Gene (Uniprot):Tb11.01.5460
Chain IDs:TA (auth: DQ)
Chain Length:268
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q382E8 Pfam ID:PF10469
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS65
Gene (Uniprot):Tb05.6E7.450
Chain IDs:UA (auth: DR)
Chain Length:270
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57UA2
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS66
Gene (Uniprot):Tb10.61.3110
Chain IDs:VA (auth: DS)
Chain Length:261
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q388L7 Pfam ID:PF14311
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Rhodanese domain-containing protein
Gene (Uniprot):Tb06.30P15.560
Chain IDs:WA (auth: DT)
Chain Length:247
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q586G5 Pfam ID:PF00581
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ubiquitin-like domain-containing protein
Gene (Uniprot):Tb03.48O8.680
Chain IDs:XA (auth: DU)
Chain Length:228
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q582T9 Pfam ID:PF00240
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS69
Gene (Uniprot):Tb08.4A8.150
Chain IDs:YA (auth: DV)
Chain Length:183
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57UZ6
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS70
Gene (Uniprot):Tb11.01.2170
Chain IDs:ZA (auth: DW)
Chain Length:179
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q383N9
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS71
Gene (Uniprot):Tb11.01.2920
Chain IDs:AB (auth: DX)
Chain Length:169
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q383G5
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS72
Gene (Uniprot):Tb07.13M20.50
Chain IDs:BB (auth: DY)
Chain Length:163
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57YD4
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mS73
Gene (Uniprot):Tb06.26G9.560
Chain IDs:CB (auth: DZ)
Chain Length:94
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q587C4
Polymer Type:polypeptide(L)
Molecule:mS74
Chain IDs:DB (auth: Da)
Chain Length:64
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-SAF3
Gene (Uniprot):Tb09.211.0950
Chain IDs:EB (auth: F3)
Chain Length:966
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38E61
Polymer Type:polypeptide(L)
Molecule:mt-SAF6
Chain IDs:FB (auth: F6)
Chain Length:676
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-SAF7
Gene (Uniprot):Tb08.4A8.560
Chain IDs:GB (auth: F7)
Chain Length:679
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57UW6
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-SAF9
Gene (Uniprot):Tb07.13M20.220
Chain IDs:HB (auth: F9)
Chain Length:608
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57YC0
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-SAF22
Gene (Uniprot):Tb10.26.0050
Chain IDs:IB (auth: FO)
Chain Length:334
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q389F9
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA photolyase, putative
Gene (Uniprot):Tb11.01.4170
Chain IDs:JB (auth: Ff)
Chain Length:848
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q382U6 Pfam ID:PF00875, PF03441
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Acyl transferase-like protein
Gene (Uniprot):Tb09.211.3020
Chain IDs:KB (auth: Fg)
Chain Length:550
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38DK4 Pfam ID:PF00698
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-SAF37
Gene (Uniprot):Tb10.6k15.1310
Chain IDs:LB (auth: Fh)
Chain Length:318
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q38A63
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-SAF38
Gene (Uniprot):Tb05.1P6.850
Chain IDs:MB (auth: Fi)
Chain Length:629
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57ZP1
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Translation initiation factor IF-2, putative
Gene (Uniprot):Tb07.28B13.850
Chain IDs:NB (auth: IA)
Chain Length:787
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q57WE3 Pfam ID:PF00009, PF22042
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-SAF39
Gene (Uniprot):Tb10.61.0190
Chain IDs:OB (auth: IB)
Chain Length:803
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
UniProt ID:Q387Q6
Polymer Type:polypeptide(L)
Molecule:Unk
Chain IDs:PB (auth: U6), VB (auth: UJ)
Chain Length:21
Number of Molecules:2
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:Unk7
Chain IDs:QB (auth: U7)
Chain Length:40
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UnkE
Chain IDs:RB (auth: UE)
Chain Length:53
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UnkF
Chain IDs:SB (auth: UF)
Chain Length:39
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UnkG
Chain IDs:TB (auth: UG)
Chain Length:13
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UnkI
Chain IDs:UB (auth: UI)
Chain Length:10
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UnkK
Chain IDs:WB (auth: UK)
Chain Length:3
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UnkL
Chain IDs:XB (auth: UL)
Chain Length:20
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Ligand Molecules
ATP
FAD
GDP
MG
PO4
UTP
ZN
Primary Citation
Mitoribosomal small subunit maturation involves formation of initiation-like complexes.
Proc.Natl.Acad.Sci.USA 119 ? ? (2022)
PMID: 35042777 DOI: 10.1073/pnas.2114710118

Abstact

Mitochondrial ribosomes (mitoribosomes) play a central role in synthesizing mitochondrial inner membrane proteins responsible for oxidative phosphorylation. Although mitoribosomes from different organisms exhibit considerable structural variations, recent insights into mitoribosome assembly suggest that mitoribosome maturation follows common principles and involves a number of conserved assembly factors. To investigate the steps involved in the assembly of the mitoribosomal small subunit (mt-SSU) we determined the cryoelectron microscopy structures of middle and late assembly intermediates of the Trypanosoma brucei mitochondrial small subunit (mt-SSU) at 3.6- and 3.7-Å resolution, respectively. We identified five additional assembly factors that together with the mitochondrial initiation factor 2 (mt-IF-2) specifically interact with functionally important regions of the rRNA, including the decoding center, thereby preventing premature mRNA or large subunit binding. Structural comparison of assembly intermediates with mature mt-SSU combined with RNAi experiments suggests a noncanonical role of mt-IF-2 and a stepwise assembly process, where modular exchange of ribosomal proteins and assembly factors together with mt-IF-2 ensure proper 9S rRNA folding and protein maturation during the final steps of assembly.

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Protein

Chemical

Disease

Primary Citation of related structures
7PUB