8P5D image
Deposition Date 2023-05-23
Release Date 2023-06-21
Last Version Date 2024-11-13
Entry Detail
PDB ID:
8P5D
Keywords:
RIBOSOME
Title:
Spraguea lophii ribosome in the closed conformation by cryo sub tomogram averaging
Biological Source:
Source Organism:
Spraguea lophii 42_110 (Taxon ID: 1358809)
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
10.80 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SUBTOMOGRAM AVERAGING
8P5D validation report
Macromolecular Entities
Polymer Type:polyribonucleotide
Molecule:RNA 28S
Chain IDs:A (auth: L50)
Chain Length:2618
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
Polymer Type:polyribonucleotide
Molecule:RNA 5S
Chain IDs:B (auth: L70)
Chain Length:119
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L8
Gene (Uniprot):SLOPH_78
Chain IDs:C (auth: LA0)
Chain Length:246
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W736 Pfam ID:PF03947
Polymer Type:polypeptide(L)
Molecule:uL15
Chain IDs:D (auth: LAA)
Chain Length:147
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L3
Gene (Uniprot):SLOPH_68
Chain IDs:E (auth: LB0)
Chain Length:392
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XFB1 Pfam ID:PF00297
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L4
Gene (Uniprot):SLOPH_73
Chain IDs:F (auth: LC0)
Chain Length:328
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WCM8 Pfam ID:PF00573
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L3
Gene (Uniprot):SLOPH_69
Chain IDs:G (auth: LCC)
Chain Length:110
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WAY0 Pfam ID:PF01248
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L5
Gene (Uniprot):SLOPH_75
Chain IDs:H (auth: LD0)
Chain Length:291
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XIG7 Pfam ID:PF17144, PF14204
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L31
Gene (Uniprot):SLOPH_2196
Chain IDs:I (auth: LDD)
Chain Length:110
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XW48 Pfam ID:PF01198
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L6
Gene (Uniprot):SLOPH_2210
Chain IDs:J (auth: LE0)
Chain Length:171
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W5S3
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L32
Gene (Uniprot):SLOPH_70
Chain IDs:K (auth: LEE)
Chain Length:139
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XKE0 Pfam ID:PF01655
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L7
Gene (Uniprot):SLOPH_76
Chain IDs:L (auth: LF0)
Chain Length:235
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W946 Pfam ID:PF00327
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L35a
Gene (Uniprot):SLOPH_71
Chain IDs:M (auth: LFF)
Chain Length:111
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W662 Pfam ID:PF01247
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L8
Gene (Uniprot):SLOPH_77
Chain IDs:N (auth: LG0)
Chain Length:206
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XU63 Pfam ID:PF01248
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L34
Gene (Uniprot):SLOPH_1567
Chain IDs:O (auth: LGG)
Chain Length:106
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W7C6 Pfam ID:PF01199
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L9
Gene (Uniprot):SLOPH_79
Chain IDs:P (auth: LH0)
Chain Length:187
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XRZ9 Pfam ID:PF00347
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ribosomal L29 protein (Fragment),Ribosomal L29 protein (Fragment),Ribosomal L29 protein (Fragment),Ribosomal L29 protein
Gene (Uniprot):SLOPH_2194
Chain IDs:Q (auth: LHH)
Chain Length:119
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W7Y2 Pfam ID:PF00831
Protein Blast
Polymer Type:polypeptide(L)
Molecule:S60 ribosomal protein L10
Gene (Uniprot):SLOPH_1601
Chain IDs:R (auth: LI0)
Chain Length:218
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WBF8 Pfam ID:PF00252
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L36
Gene (Uniprot):SLOPH_72
Chain IDs:S (auth: LII)
Chain Length:98
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WED1 Pfam ID:PF01158
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L11
Gene (Uniprot):SLOPH_56
Chain IDs:T (auth: LJ0)
Chain Length:171
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WB69 Pfam ID:PF00281, PF00673
Polymer Type:polypeptide(L)
Molecule:eL37
Chain IDs:U (auth: LJJ)
Chain Length:92
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L13
Gene (Uniprot):SLOPH_32
Chain IDs:V (auth: LL0)
Chain Length:165
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XVM9 Pfam ID:PF01294
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L39
Gene (Uniprot):SLOPH_2202
Chain IDs:W (auth: LLL)
Chain Length:52
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XTP1 Pfam ID:PF00832
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transposase
Gene (Uniprot):SLOPH_1179
Chain IDs:X (auth: LM0)
Chain Length:115
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XVN9
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ubiquitin
Gene (Uniprot):SLOPH_2019
Chain IDs:Y (auth: LMM)
Chain Length:127
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XSQ3 Pfam ID:PF00240, PF01020
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L15
Gene (Uniprot):SLOPH_1565
Chain IDs:Z (auth: LN0)
Chain Length:204
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W7A2 Pfam ID:PF00827
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L13A
Gene (Uniprot):SLOPH_1564
Chain IDs:AA (auth: LO0)
Chain Length:198
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XUD8 Pfam ID:PF00572
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L44
Gene (Uniprot):SLOPH_74
Chain IDs:BA (auth: LOO)
Chain Length:104
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XL20 Pfam ID:PF00935
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L17
Gene (Uniprot):SLOPH_58
Chain IDs:CA (auth: LP0)
Chain Length:167
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WDR4 Pfam ID:PF00237
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L37a
Gene (Uniprot):SLOPH_2590
Chain IDs:DA (auth: LPP)
Chain Length:89
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W6N9 Pfam ID:PF01780
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L18
Gene (Uniprot):SLOPH_59
Chain IDs:EA (auth: LQ0)
Chain Length:183
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WAI2 Pfam ID:PF17135
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L19
Gene (Uniprot):SLOPH_60
Chain IDs:FA (auth: LR0)
Chain Length:168
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WBY9 Pfam ID:PF01280
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L20
Gene (Uniprot):SLOPH_61
Chain IDs:GA (auth: LS0)
Chain Length:171
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WAG4 Pfam ID:PF01775
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60s ribosomal protein L21
Gene (Uniprot):SLOPH_62
Chain IDs:HA (auth: LT0)
Chain Length:158
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W8F6 Pfam ID:PF01157
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L22
Gene (Uniprot):SLOPH_63
Chain IDs:IA (auth: LU0)
Chain Length:113
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W958 Pfam ID:PF01776
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L23
Gene (Uniprot):SLOPH_2233
Chain IDs:JA (auth: LV0)
Chain Length:142
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XLC4 Pfam ID:PF00238
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L24E
Gene (Uniprot):SLOPH_1566
Chain IDs:KA (auth: LW0)
Chain Length:131
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XSY2 Pfam ID:PF01246
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L23a
Gene (Uniprot):SLOPH_64
Chain IDs:LA (auth: LX0)
Chain Length:113
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XFW8 Pfam ID:PF00276
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L26
Gene (Uniprot):SLOPH_65
Chain IDs:MA (auth: LY0)
Chain Length:131
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W884 Pfam ID:PF16906, PF00467
Protein Blast
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L27
Gene (Uniprot):SLOPH_66
Chain IDs:NA (auth: LZ0)
Chain Length:153
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XU08 Pfam ID:PF01777
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNL-type domain-containing protein
Gene (Uniprot):SLOPH_1662
Chain IDs:OA (auth: MD1)
Chain Length:151
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W5K5 Pfam ID:PF05907
Polymer Type:polyribonucleotide
Molecule:RNA 16S
Chain IDs:PA (auth: S60)
Chain Length:1368
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S0
Gene (Uniprot):SLOPH_25
Chain IDs:QA (auth: SA0)
Chain Length:233
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W8R1 Pfam ID:PF00318
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S26
Gene (Uniprot):SLOPH_1572
Chain IDs:RA (auth: SAA)
Chain Length:102
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W9M7 Pfam ID:PF01283
Polymer Type:polypeptide(L)
Molecule:eS1
Chain IDs:SA (auth: SB0)
Chain Length:230
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
Polymer Type:polypeptide(L)
Molecule:eS27
Chain IDs:TA (auth: SBB)
Chain Length:82
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S2
Gene (Uniprot):SLOPH_2189
Chain IDs:UA (auth: SC0)
Chain Length:248
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W7R5 Pfam ID:PF00333, PF03719
Polymer Type:polypeptide(L)
Molecule:eS28
Chain IDs:VA (auth: SCC)
Chain Length:65
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S3
Gene (Uniprot):SLOPH_40
Chain IDs:WA (auth: SD0)
Chain Length:242
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WAW0 Pfam ID:PF00189
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S29
Gene (Uniprot):SLOPH_2174
Chain IDs:XA (auth: SDD)
Chain Length:65
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XJB1 Pfam ID:PF00253
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S4
Gene (Uniprot):SLOPH_43
Chain IDs:YA (auth: SE0)
Chain Length:280
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XG51 Pfam ID:PF08071, PF00900, PF16121
Polymer Type:polypeptide(L)
Molecule:eS30
Chain IDs:ZA (auth: SEE)
Chain Length:60
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S5
Gene (Uniprot):SLOPH_44
Chain IDs:AB (auth: SF0)
Chain Length:195
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W4M9 Pfam ID:PF00177
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ubiquitin/40s ribosomal protein S27a fusion
Gene (Uniprot):SLOPH_2039
Chain IDs:BB (auth: SFF)
Chain Length:150
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W9X5 Pfam ID:PF00240, PF01599
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S6
Gene (Uniprot):SLOPH_45
Chain IDs:CB (auth: SG0)
Chain Length:230
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WDE5 Pfam ID:PF01092
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Guanine nucleotide binding protein beta subunit
Gene (Uniprot):SLOPH_2232
Chain IDs:DB (auth: SGG)
Chain Length:326
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XVG3 Pfam ID:PF00400
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S7
Gene (Uniprot):SLOPH_46
Chain IDs:EB (auth: SH0)
Chain Length:164
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XV29 Pfam ID:PF01251
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S8
Gene (Uniprot):SLOPH_47
Chain IDs:FB (auth: SI0)
Chain Length:173
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XGW2 Pfam ID:PF01201
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S9
Gene (Uniprot):SLOPH_48
Chain IDs:GB (auth: SJ0)
Chain Length:184
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W8E3 Pfam ID:PF01479
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S10
Gene (Uniprot):SLOPH_26
Chain IDs:HB (auth: SK0)
Chain Length:107
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XU48 Pfam ID:PF03501
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S11
Gene (Uniprot):SLOPH_27
Chain IDs:IB (auth: SL0)
Chain Length:155
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W8R0 Pfam ID:PF16205, PF00366
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S12
Gene (Uniprot):SLOPH_28
Chain IDs:JB (auth: SM0)
Chain Length:130
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W7D2 Pfam ID:PF01248
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S13
Gene (Uniprot):SLOPH_29
Chain IDs:KB (auth: SN0)
Chain Length:143
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XVZ9 Pfam ID:PF08069
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S14
Gene (Uniprot):SLOPH_30
Chain IDs:LB (auth: SO0)
Chain Length:135
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W6I0 Pfam ID:PF00411
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein S19
Gene (Uniprot):SLOPH_1570
Chain IDs:MB (auth: SP0)
Chain Length:163
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XKY9 Pfam ID:PF00203
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S16
Gene (Uniprot):SLOPH_2103
Chain IDs:NB (auth: SQ0)
Chain Length:143
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WDU9 Pfam ID:PF00380
Polymer Type:polypeptide(L)
Molecule:eS17
Chain IDs:OB (auth: SR0)
Chain Length:120
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S18
Gene (Uniprot):SLOPH_33
Chain IDs:PB (auth: SS0)
Chain Length:160
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XJA1 Pfam ID:PF00416
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S Ribosomal protein S19
Gene (Uniprot):SLOPH_34
Chain IDs:QB (auth: ST0)
Chain Length:143
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W7P5 Pfam ID:PF01090
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S20
Gene (Uniprot):SLOPH_35
Chain IDs:RB (auth: SU0)
Chain Length:119
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W986 Pfam ID:PF00338
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein S21E
Gene (Uniprot):SLOPH_2726
Chain IDs:SB (auth: SV0)
Chain Length:67
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WAC1 Pfam ID:PF01249
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S15A
Gene (Uniprot):SLOPH_31
Chain IDs:TB (auth: SW0)
Chain Length:128
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7XK92 Pfam ID:PF00410
Polymer Type:polypeptide(L)
Molecule:uS12
Chain IDs:UB (auth: SX0)
Chain Length:141
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40s ribosomal protein s24
Gene (Uniprot):SLOPH_37
Chain IDs:VB (auth: SY0)
Chain Length:146
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7W8J5 Pfam ID:PF01282
Protein Blast
Polymer Type:polypeptide(L)
Molecule:40S ribosomal protein S25
Gene (Uniprot):SLOPH_1571
Chain IDs:WB (auth: SZ0)
Chain Length:128
Number of Molecules:1
Biological Source:Spraguea lophii 42_110
UniProt ID:S7WAV8 Pfam ID:PF03297
Ligand Molecules
ZN
Primary Citation
CryoEM reveals that ribosomes in microsporidian spores are locked in a dimeric hibernating state.
Nat Microbiol 8 1834 1845 (2023)
PMID: 37709902 DOI: 10.1038/s41564-023-01469-w

Abstact

Translational control is an essential process for the cell to adapt to varying physiological or environmental conditions. To survive adverse conditions such as low nutrient levels, translation can be shut down almost entirely by inhibiting ribosomal function. Here we investigated eukaryotic hibernating ribosomes from the microsporidian parasite Spraguea lophii in situ by a combination of electron cryo-tomography and single-particle electron cryo-microscopy. We show that microsporidian spores contain hibernating ribosomes that are locked in a dimeric (100S) state, which is formed by a unique dimerization mechanism involving the beak region. The ribosomes within the dimer are fully assembled, suggesting that they are ready to be activated once the host cell is invaded. This study provides structural evidence for dimerization acting as a mechanism for ribosomal hibernation in microsporidia, and therefore demonstrates that eukaryotes utilize this mechanism in translational control.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
7QCA
7QJH