6YXX image
Deposition Date 2020-05-04
Release Date 2020-10-14
Last Version Date 2024-10-23
Entry Detail
PDB ID:
6YXX
Keywords:
Title:
State A of the Trypanosoma brucei mitoribosomal large subunit assembly intermediate
Biological Source:
Source Organism:
Method Details:
Experimental Method:
Resolution:
3.90 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:bL28m
Gene (Uniprot):Tb06.4F7.280
Chain IDs:A (auth: A1)
Chain Length:241
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:uL29m
Gene (Uniprot):Tb09.160.5240
Chain IDs:C (auth: A2)
Chain Length:471
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:uL30m
Gene (Uniprot):TbgDal_IX4520
Chain IDs:E (auth: A3)
Chain Length:218
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:bL32m
Gene (Uniprot):Tb04.1H19.670
Chain IDs:H (auth: A5)
Chain Length:80
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:bL35m
Gene (Uniprot):TbgDal_X2260
Chain IDs:K (auth: A8)
Chain Length:181
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polyribonucleotide
Molecule:12S ribosomal RNA
Chain IDs:L (auth: AA)
Chain Length:1176
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L3 mitochondrial, putative
Gene (Uniprot):Tb03.5L5.850
Chain IDs:U (auth: AE)
Chain Length:197
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L4/L1 family, putative
Gene (Uniprot):TEOVI_000582800
Chain IDs:X (auth: AF)
Chain Length:459
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:RIBOSOMAL_L9 domain-containing protein
Gene (Uniprot):Tb05.6E7.50
Chain IDs:DA (auth: AI)
Chain Length:263
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L11, putative
Gene (Uniprot):30M24.135
Chain IDs:HA (auth: AK)
Chain Length:342
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L13, putative
Gene (Uniprot):Tb04.5E12.380
Chain IDs:OA (auth: AN)
Chain Length:202
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ribosomal_L18e/L15P domain-containing protein
Gene (Uniprot):Tb05.6E7.1030
Chain IDs:TA (auth: AP)
Chain Length:374
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L17, putative
Gene (Uniprot):Tb08.11J15.1100
Chain IDs:WA (auth: AR)
Chain Length:301
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:bL19m
Gene (Uniprot):TB927.1.1210
Chain IDs:BB (auth: AT)
Chain Length:154
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:bL20m
Gene (Uniprot):Tb11.01.1930
Chain IDs:EB (auth: AU)
Chain Length:213
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:bL21m
Gene (Uniprot):TbgDal_VII4650
Chain IDs:GB (auth: AV)
Chain Length:188
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:uL22m
Gene (Uniprot):TbgDal_VII3160
Chain IDs:IB (auth: AW)
Chain Length:278
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:uL23m
Gene (Uniprot):Tb11.03.0260
Chain IDs:KB (auth: AX)
Chain Length:246
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:uL24m
Gene (Uniprot):TbgDal_III1550
Chain IDs:LB (auth: AY)
Chain Length:378
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL41
Gene (Uniprot):Tb11.01.1600
Chain IDs:QB (auth: Ae)
Chain Length:197
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL42
Gene (Uniprot):Tb11.01.1840
Chain IDs:RB (auth: Af)
Chain Length:459
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:L51_S25_CI-B8 domain-containing protein
Gene (Uniprot):Tb04.3I12.430
Chain IDs:UB (auth: Ag)
Chain Length:260
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL49
Gene (Uniprot):Tb05.27M3.100
Chain IDs:YB (auth: Al)
Chain Length:218
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:mL52
Chain IDs:CC (auth: Ao)
Chain Length:1520
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL53
Gene (Uniprot):DPX39_070039500, DPX39_070040000
Chain IDs:DC (auth: Ap)
Chain Length:374
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL63
Gene (Uniprot):TbgDal_VII8230
Chain IDs:HC (auth: At)
Chain Length:154
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL64
Gene (Uniprot):TbgDal_XI13040
Chain IDs:IC (auth: Av)
Chain Length:188
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL67
Gene (Uniprot):TbgDal_XI1730
Chain IDs:M (auth: BA)
Chain Length:153
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL68
Gene (Uniprot):TbgDal_X580
Chain IDs:P (auth: BB)
Chain Length:541
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:mL70
Chain IDs:S (auth: BD)
Chain Length:547
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL71
Gene (Uniprot):Tb07.28B13.610
Chain IDs:V (auth: BE)
Chain Length:449
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Tetratricopeptide repeat
Gene (Uniprot):DPX39_060043600
Chain IDs:Y (auth: BF)
Chain Length:113
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL74
Gene (Uniprot):Tb10.6k15.3290
Chain IDs:BA (auth: BH)
Chain Length:349
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL75
Gene (Uniprot):TbgDal_X310
Chain IDs:EA (auth: BI)
Chain Length:342
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL76
Gene (Uniprot):Tb11.01.2340
Chain IDs:GA (auth: BJ)
Chain Length:333
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Chaperone protein DNAj, putative
Gene (Uniprot):TbgDal_VI2240
Chain IDs:IA (auth: BK)
Chain Length:386
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL78
Gene (Uniprot):TbgDal_X13360
Chain IDs:KA (auth: BL)
Chain Length:312
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL80
Gene (Uniprot):TbgDal_VI1080
Chain IDs:PA (auth: BN)
Chain Length:302
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL81
Gene (Uniprot):TbgDal_XI6240
Chain IDs:RA (auth: BO)
Chain Length:262
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Peptidyl-prolyl cis-trans isomerase
Gene (Uniprot):Tb07.28B13.640
Chain IDs:VA (auth: BQ)
Chain Length:231
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL84
Gene (Uniprot):Tb06.4F7.230
Chain IDs:XA (auth: BR)
Chain Length:205
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL85
Gene (Uniprot):Tb09.160.2250
Chain IDs:ZA (auth: BS)
Chain Length:198
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL86
Gene (Uniprot):DPX39_050048100
Chain IDs:CB (auth: BT)
Chain Length:191
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL87
Gene (Uniprot):TbgDal_XI9190
Chain IDs:FB (auth: BU)
Chain Length:185
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL88
Gene (Uniprot):TbgDal_VIII1510
Chain IDs:HB (auth: BV)
Chain Length:190
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL89
Gene (Uniprot):Tb03.27F10.650
Chain IDs:JB (auth: BW)
Chain Length:188
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Peptidyl-prolyl cis-trans isomerase
Gene (Uniprot):Tb11.01.1215
Chain IDs:MB (auth: BZ)
Chain Length:190
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL93
Gene (Uniprot):TbgDal_X13710
Chain IDs:NB (auth: Ba)
Chain Length:153
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL94
Gene (Uniprot):Tb09.160.5050
Chain IDs:OB (auth: Bb)
Chain Length:541
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL95
Gene (Uniprot):Tb10.26.0585
Chain IDs:PB (auth: Bc)
Chain Length:146
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mL98
Gene (Uniprot):Tb10.61.3155
Chain IDs:SB (auth: Bf)
Chain Length:113
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-LAF21
Gene (Uniprot):Tb07.28B13.550
Chain IDs:B (auth: E1)
Chain Length:482
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DUF4379 domain-containing protein
Gene (Uniprot):TbgDal_VII6670
Chain IDs:D (auth: E2)
Chain Length:568
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-LAF23
Gene (Uniprot):TbgDal_XI6640
Chain IDs:F (auth: E3)
Chain Length:557
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-LAF24
Gene (Uniprot):Tb06.2N9.90
Chain IDs:G (auth: E4)
Chain Length:439
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:mt-LAF25
Chain IDs:I (auth: E5)
Chain Length:376
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:KRIPP3
Gene (Uniprot):TB927.1.1160
Chain IDs:J (auth: E6)
Chain Length:531
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:mt-LAF27
Chain IDs:VB (auth: E7)
Chain Length:97
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:KRIPP9
Gene (Uniprot):Tb08.28L1.130
Chain IDs:WB (auth: E8)
Chain Length:786
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-LAF29
Gene (Uniprot):DPX39_100137800
Chain IDs:XB (auth: E9)
Chain Length:343
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-EngA
Gene (Uniprot):Tb07.29D18.100
Chain IDs:N (auth: EA)
Chain Length:576
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DEAD-box helicase, putative
Gene (Uniprot):TbgDal_XI14390
Chain IDs:Q (auth: EB)
Chain Length:754
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Pseudouridylate synthase, putative
Gene (Uniprot):Tb09.160.2000
Chain IDs:R (auth: EC)
Chain Length:406
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-LAF4
Gene (Uniprot):Tb11.02.3800
Chain IDs:T (auth: ED)
Chain Length:616
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:SpoU_methylase domain-containing protein
Gene (Uniprot):TbgDal_IX7900
Chain IDs:W (auth: EE)
Chain Length:586
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:SpoU_methylase domain-containing protein
Gene (Uniprot):TbgDal_VIII6660
Chain IDs:Z (auth: EF)
Chain Length:373
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-LAF7
Gene (Uniprot):Tb10.61.0430
Chain IDs:AA (auth: EG)
Chain Length:156
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-LAF8
Gene (Uniprot):TEOVI_000214000
Chain IDs:CA (auth: EH)
Chain Length:634
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-LAF12
Gene (Uniprot):TbgDal_VIII3060
Chain IDs:LA (auth: EL)
Chain Length:691
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:GTP-binding protein, putative
Gene (Uniprot):Tb09.211.0810
Chain IDs:MA (auth: EM)
Chain Length:451
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-LAF14
Gene (Uniprot):TbgDal_V5380
Chain IDs:QA (auth: EN)
Chain Length:731
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-LAF15a
Gene (Uniprot):TbgDal_IV4790
Chain IDs:SA (auth: EO), UA (auth: EP)
Chain Length:319
Number of Molecules:2
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Acyl carrier protein
Gene (Uniprot):Tb03.27F10.580
Chain IDs:YA (auth: ER)
Chain Length:148
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Lipase (Class 3)
Gene (Uniprot):DPX39_090084400
Chain IDs:AB (auth: ES)
Chain Length:524
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:mt-LAF19
Gene (Uniprot):Tb11.01.1810
Chain IDs:DB (auth: ET)
Chain Length:102
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UNK
Chain IDs:O (auth: UA), TB (auth: Uf)
Chain Length:10
Number of Molecules:2
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UNK
Chain IDs:FA (auth: UI), FC (auth: Ur)
Chain Length:21
Number of Molecules:2
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UNK
Chain IDs:JA (auth: UK)
Chain Length:25
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UNK
Chain IDs:NA (auth: UM)
Chain Length:8
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UNK
Chain IDs:ZB (auth: Ul)
Chain Length:238
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UNK
Chain IDs:AC (auth: Um)
Chain Length:8
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UNK
Chain IDs:BC (auth: Un)
Chain Length:28
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UNK
Chain IDs:EC (auth: Up)
Chain Length:87
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Polymer Type:polypeptide(L)
Molecule:UNK
Chain IDs:GC (auth: Us)
Chain Length:79
Number of Molecules:1
Biological Source:Trypanosoma brucei brucei
Primary Citation
Structural Insights into the Mechanism of Mitoribosomal Large Subunit Biogenesis.
Mol.Cell 79 629 644.e4 (2020)
PMID: 32679035 DOI: 10.1016/j.molcel.2020.06.030

Abstact

In contrast to the bacterial translation machinery, mitoribosomes and mitochondrial translation factors are highly divergent in terms of composition and architecture. There is increasing evidence that the biogenesis of mitoribosomes is an intricate pathway, involving many assembly factors. To better understand this process, we investigated native assembly intermediates of the mitoribosomal large subunit from the human parasite Trypanosoma brucei using cryo-electron microscopy. We identify 28 assembly factors, 6 of which are homologous to bacterial and eukaryotic ribosome assembly factors. They interact with the partially folded rRNA by specifically recognizing functionally important regions such as the peptidyltransferase center. The architectural and compositional comparison of the assembly intermediates indicates a stepwise modular assembly process, during which the rRNA folds toward its mature state. During the process, several conserved GTPases and a helicase form highly intertwined interaction networks that stabilize distinct assembly intermediates. The presented structures provide general insights into mitoribosomal maturation.

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Disease

Primary Citation of related structures