3JCN image
Deposition Date 2016-01-04
Release Date 2016-03-09
Last Version Date 2024-11-06
Entry Detail
PDB ID:
3JCN
Keywords:
RIBOSOME
Title:
Structures of ribosome-bound initiation factor 2 reveal the mechanism of subunit association: Initiation Complex I
Biological Source:
Source Organism:
Escherichia coli (Taxon ID: 562)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
4.60 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
3JCN validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L32
Gene (Uniprot):rpmF
Chain IDs:A (auth: 0)
Chain Length:57
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7N4 Pfam ID:PF01783
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L33
Gene (Uniprot):rpmG
Chain IDs:B (auth: 1)
Chain Length:55
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7N9 Pfam ID:PF00471
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L34
Gene (Uniprot):rpmH
Chain IDs:C (auth: 2)
Chain Length:46
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7P5 Pfam ID:PF00468
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L35
Gene (Uniprot):rpmI
Chain IDs:D (auth: 3)
Chain Length:65
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7Q1 Pfam ID:PF01632
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L36
Gene (Uniprot):rpmJ
Chain IDs:E (auth: 4)
Chain Length:38
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7Q6 Pfam ID:PF00444
Polymer Type:polyribonucleotide
Molecule:23S ribosomal RNA
Chain IDs:F (auth: A)
Chain Length:1542
Number of Molecules:1
Biological Source:Escherichia coli
Polymer Type:polyribonucleotide
Molecule:5S ribosomal RNA
Chain IDs:G (auth: B)
Chain Length:890
Number of Molecules:1
Biological Source:Escherichia coli
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L2
Gene (Uniprot):rplB
Chain IDs:H (auth: C)
Chain Length:273
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P60422 Pfam ID:PF00181, PF03947
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L3
Gene (Uniprot):rplC
Chain IDs:I (auth: D)
Chain Length:209
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P60438 Pfam ID:PF00297
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L4
Gene (Uniprot):rplD
Chain IDs:J (auth: E)
Chain Length:201
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P60723 Pfam ID:PF00573
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L5
Gene (Uniprot):rplE
Chain IDs:K (auth: F)
Chain Length:179
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P62399 Pfam ID:PF00281, PF00673
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L6
Gene (Uniprot):rplF
Chain IDs:L (auth: G)
Chain Length:177
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AG55 Pfam ID:PF00347
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L9
Gene (Uniprot):rplI
Chain IDs:M (auth: H)
Chain Length:149
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7R1 Pfam ID:PF01281, PF03948
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L11
Gene (Uniprot):rplK
Chain IDs:N (auth: I)
Chain Length:135
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7J7 Pfam ID:PF03946, PF00298
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L13
Gene (Uniprot):rplM
Chain IDs:O (auth: J)
Chain Length:130
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AA10 Pfam ID:PF00572
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L14
Gene (Uniprot):rplN
Chain IDs:P (auth: K)
Chain Length:130
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0ADY3 Pfam ID:PF00238
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L15
Gene (Uniprot):rplO
Chain IDs:Q (auth: L)
Chain Length:144
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P02413 Pfam ID:PF00828
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L16
Gene (Uniprot):rplP
Chain IDs:R (auth: M)
Chain Length:102
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0ADY7 Pfam ID:PF00252
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L17
Gene (Uniprot):rplQ
Chain IDs:S (auth: N)
Chain Length:118
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AG44 Pfam ID:PF01196
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L18
Gene (Uniprot):rplR
Chain IDs:T (auth: O)
Chain Length:124
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0C018 Pfam ID:PF00861
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L19
Gene (Uniprot):rplS
Chain IDs:U (auth: P)
Chain Length:115
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7K6 Pfam ID:PF01245
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L20
Gene (Uniprot):rplT
Chain IDs:V (auth: Q)
Chain Length:118
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7L3 Pfam ID:PF00453
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L21
Gene (Uniprot):rplU
Chain IDs:W (auth: R)
Chain Length:103
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AG48 Pfam ID:PF00829
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L22
Gene (Uniprot):rplV
Chain IDs:X (auth: S)
Chain Length:82
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P61175 Pfam ID:PF00237
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L23
Gene (Uniprot):rplW
Chain IDs:Y (auth: T)
Chain Length:92
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0ADZ0 Pfam ID:PF00276
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L24
Gene (Uniprot):rplX
Chain IDs:Z (auth: U)
Chain Length:75
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P60624 Pfam ID:PF00467, PF17136
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L25
Gene (Uniprot):rplY
Chain IDs:AA (auth: V)
Chain Length:77
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P68919 Pfam ID:PF01386
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L27
Gene (Uniprot):rpmA
Chain IDs:BA (auth: W)
Chain Length:71
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7L8 Pfam ID:PF01016
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L28
Gene (Uniprot):rpmB
Chain IDs:CA (auth: X)
Chain Length:78
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7M2 Pfam ID:PF00830
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L29
Gene (Uniprot):rpmC
Chain IDs:DA (auth: Y)
Chain Length:63
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7M6 Pfam ID:PF00831
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L30
Gene (Uniprot):rpmD
Chain IDs:EA (auth: Z)
Chain Length:6
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AG51 Pfam ID:PF00327
Polymer Type:polyribonucleotide
Molecule:16S ribosomal RNA
Chain IDs:FA (auth: a)
Chain Length:1542
Number of Molecules:1
Biological Source:Escherichia coli
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Translation initiation factor IF-2
Gene (Uniprot):infB
Chain IDs:GA (auth: b)
Chain Length:890
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A705 Pfam ID:PF04760, PF08364, PF00009, PF22042, PF11987, PF03144 EC:3.6.5.3
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S3
Gene (Uniprot):rpsC
Chain IDs:HA (auth: c)
Chain Length:273
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7V3 Pfam ID:PF07650, PF00189
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S2
Gene (Uniprot):rpsB
Chain IDs:IA (auth: d)
Chain Length:209
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7V0 Pfam ID:PF00318
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S5
Gene (Uniprot):rpsE
Chain IDs:JA (auth: f)
Chain Length:179
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7W1 Pfam ID:PF00333, PF03719
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S4
Gene (Uniprot):rpsD
Chain IDs:KA (auth: g)
Chain Length:177
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7V8 Pfam ID:PF00163, PF01479
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S7
Gene (Uniprot):rpsG
Chain IDs:LA (auth: h)
Chain Length:149
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P02359 Pfam ID:PF00177
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S6
Gene (Uniprot):rpsF
Chain IDs:MA (auth: i)
Chain Length:135
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P02358 Pfam ID:PF01250
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S9
Gene (Uniprot):rpsI
Chain IDs:NA (auth: j)
Chain Length:130
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7X3 Pfam ID:PF00380
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S8
Gene (Uniprot):rpsH
Chain IDs:OA (auth: k)
Chain Length:130
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7W7 Pfam ID:PF00410
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S11
Gene (Uniprot):rpsK
Chain IDs:PA (auth: l)
Chain Length:144
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7R9 Pfam ID:PF00411
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S10
Gene (Uniprot):rpsJ
Chain IDs:QA (auth: m)
Chain Length:102
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7R5 Pfam ID:PF00338
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S13
Gene (Uniprot):rpsM
Chain IDs:RA (auth: n)
Chain Length:118
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7S9 Pfam ID:PF00416
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S12
Gene (Uniprot):rpsL
Chain IDs:SA (auth: o)
Chain Length:124
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7S3 Pfam ID:PF00164
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S15
Gene (Uniprot):rpsO
Chain IDs:TA (auth: p)
Chain Length:115
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0ADZ4 Pfam ID:PF00312
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S14
Gene (Uniprot):rpsN
Chain IDs:UA (auth: q)
Chain Length:118
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AG59 Pfam ID:PF00253
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S17
Gene (Uniprot):rpsQ
Chain IDs:VA (auth: r)
Chain Length:103
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AG63 Pfam ID:PF00366
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S16
Gene (Uniprot):rpsP
Chain IDs:WA (auth: s)
Chain Length:82
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7T3 Pfam ID:PF00886
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S19
Gene (Uniprot):rpsS
Chain IDs:XA (auth: t)
Chain Length:92
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7U3 Pfam ID:PF00203
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S18
Gene (Uniprot):rpsR
Chain IDs:YA (auth: u)
Chain Length:75
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7T7 Pfam ID:PF01084
Polymer Type:polyribonucleotide
Molecule:tRNA
Chain IDs:ZA (auth: v)
Chain Length:77
Number of Molecules:1
Biological Source:Escherichia coli
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S21
Gene (Uniprot):rpsU
Chain IDs:AB (auth: w)
Chain Length:71
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P68679 Pfam ID:PF01165
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S20
Gene (Uniprot):rpsT
Chain IDs:BB (auth: x)
Chain Length:78
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7U7 Pfam ID:PF01649
Polymer Type:polyribonucleotide
Molecule:messenger RNA
Chain IDs:CB (auth: z)
Chain Length:6
Number of Molecules:1
Biological Source:Escherichia coli
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
4SU ZA U 4-THIOURIDINE-5'-MONOPHOSPHATE
5MU ZA U 5-METHYLURIDINE 5'-MONOPHOSPHATE
H2U ZA U 5,6-DIHYDROURIDINE-5'-MONOPHOSPHATE
PSU ZA U PSEUDOURIDINE-5'-MONOPHOSPHATE
Ligand Molecules
FME
GNP
Primary Citation
Structures of ribosome-bound initiation factor 2 reveal the mechanism of subunit association.
Sci Adv 2 e1501502 e1501502 (2016)
PMID: 26973877 DOI: 10.1126/sciadv.1501502

Abstact

Throughout the four phases of protein biosynthesis-initiation, elongation, termination, and recycling-the ribosome is controlled and regulated by at least one specified translational guanosine triphosphatase (trGTPase). Although the structural basis for trGTPase interaction with the ribosome has been solved for the last three steps of translation, the high-resolution structure for the key initiation trGTPase, initiation factor 2 (IF2), complexed with the ribosome, remains elusive. We determine the structure of IF2 complexed with a nonhydrolyzable guanosine triphosphate analog and initiator fMet-tRNAi (Met) in the context of the Escherichia coli ribosome to 3.7-Å resolution using cryo-electron microscopy. The structural analysis reveals previously unseen intrinsic conformational modes of the 70S initiation complex, establishing the mutual interplay of IF2 and initator transfer RNA (tRNA) with the ribsosome and providing the structural foundation for a mechanistic understanding of the final steps of translation initiation.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
3JCJ