6YBS

Structure of a human 48S translational initiation complex - head


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structure of a human 48Stranslational initiation complex.

Brito Querido, J.Sokabe, M.Kraatz, S.Gordiyenko, Y.Skehel, J.M.Fraser, C.S.Ramakrishnan, V.

(2020) Science 369: 1220-1227

  • DOI: 10.1126/science.aba4904
  • Primary Citation of Related Structures:  
    6YBW, 6YBT, 6YBS, 6YBV, 6YBD, 6ZMW

  • PubMed Abstract: 
  • A key step in translational initiation is the recruitment of the 43 S preinitiation complex by the cap-binding complex [eukaryotic initiation factor 4F (eIF4F)] at the 5' end of messenger RNA (mRNA) to form the 48 S initiation complex (i.e ...

    A key step in translational initiation is the recruitment of the 43 S preinitiation complex by the cap-binding complex [eukaryotic initiation factor 4F (eIF4F)] at the 5' end of messenger RNA (mRNA) to form the 48 S initiation complex (i.e., the 48 S ). The 48 S then scans along the mRNA to locate a start codon. To understand the mechanisms involved, we used cryo-electron microscopy to determine the structure of a reconstituted human 48 S The structure reveals insights into early events of translation initiation complex assembly, as well as how eIF4F interacts with subunits of eIF3 near the mRNA exit channel in the 43 S The location of eIF4F is consistent with a slotting model of mRNA recruitment and suggests that downstream mRNA is unwound at least in part by being "pulled" through the 40 S subunit during scanning.


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge, UK. csfraser@ucdavis.edu ramak@mrc-lmb.cam.ac.uk.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Eukaryotic translation initiation factor 3 subunit DA [auth x]548Homo sapiensMutation(s): 0 
Gene Names: EIF3DEIF3S7
Find proteins for O15371 (Homo sapiens)
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PHAROS:  O15371
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Receptor of activated protein C kinase 1B [auth c]317Homo sapiensMutation(s): 0 
Gene Names: RACK1GNB2L1HLC7PIG21
Find proteins for P63244 (Homo sapiens)
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PHAROS:  P63244
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
40S ribosomal protein S28C [auth n]69Homo sapiensMutation(s): 0 
Gene Names: RPS28
Find proteins for P62857 (Homo sapiens)
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
40S ribosomal protein S17D [auth X]135Homo sapiensMutation(s): 0 
Gene Names: RPS17RPS17L
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
40S ribosomal protein S20E [auth h]119Homo sapiensMutation(s): 0 
Gene Names: RPS20
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Eukaryotic translation initiation factor 3 subunit GF [auth o]320Homo sapiensMutation(s): 0 
Gene Names: EIF3GEIF3S4
Find proteins for O75821 (Homo sapiens)
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PHAROS:  O75821
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
40S ribosomal protein S10G [auth a]165Homo sapiensMutation(s): 0 
Gene Names: RPS10
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
40S ribosomal protein S12H [auth m]132Homo sapiensMutation(s): 0 
Gene Names: RPS12
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
40S ribosomal protein S29I [auth i]56Homo sapiensMutation(s): 0 
Gene Names: RPS29
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
40S ribosomal protein S15J [auth b]145Homo sapiensMutation(s): 0 
Gene Names: RPS15RIG
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
40S ribosomal protein S3K [auth Z]243Homo sapiensMutation(s): 0 
Gene Names: RPS3OK/SW-cl.26
EC: 4.2.99.18
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
40S ribosomal protein S19L [auth d]145Homo sapiensMutation(s): 0 
Gene Names: RPS19
Find proteins for P39019 (Homo sapiens)
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetailsImage
40S ribosomal protein S25M [auth e]125Homo sapiensMutation(s): 0 
Gene Names: RPS25
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Entity ID: 14
MoleculeChainsSequence LengthOrganismDetailsImage
40S ribosomal protein S18N [auth f]152Homo sapiensMutation(s): 0 
Gene Names: RPS18D6S218E
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Entity ID: 15
MoleculeChainsSequence LengthOrganismDetailsImage
40S ribosomal protein S5O [auth V]204Homo sapiensMutation(s): 0 
Gene Names: RPS5
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Entity ID: 16
MoleculeChainsSequence LengthOrganismDetailsImage
Ubiquitin-40S ribosomal protein S27aP [auth k]156Homo sapiensMutation(s): 0 
Gene Names: RPS27AUBA80UBCEP1
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Entity ID: 17
MoleculeChainsSequence LengthOrganismDetailsImage
40S ribosomal protein S16Q [auth Y]146Homo sapiensMutation(s): 0 
Gene Names: RPS16
Find proteins for P62249 (Homo sapiens)
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Entity ID: 18
MoleculeChainsLengthOrganismImage
18S rRNAR [auth A]1876Homo sapiens
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
T [auth k]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
AA [auth A] , BA [auth A] , CA [auth A] , DA [auth A] , EA [auth A] , FA [auth A] , GA [auth A] , HA [auth A] , 
AA [auth A],  BA [auth A],  CA [auth A],  DA [auth A],  EA [auth A],  FA [auth A],  GA [auth A],  HA [auth A],  IA [auth A],  JA [auth A],  KA [auth A],  LA [auth A],  MA [auth A],  NA [auth A],  OA [auth A],  PA [auth A],  QA [auth A],  RA [auth A],  S [auth f],  SA [auth A],  TA [auth A],  U [auth A],  UA [auth A],  V [auth A],  VA [auth A],  W [auth A],  X [auth A],  Y [auth A],  Z [auth A]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited KingdomWTY096570
Medical Research Council (MRC, United Kingdom)United KingdomMC_U105184332
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM092927

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-16
    Type: Initial release