7OBR image
Deposition Date 2021-04-23
Release Date 2021-07-21
Last Version Date 2024-11-20
Entry Detail
PDB ID:
7OBR
Title:
RNC-SRP early complex
Biological Source:
Method Details:
Experimental Method:
Resolution:
2.80 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polyribonucleotide
Molecule:SRP RNA
Chain IDs:A (auth: 1)
Chain Length:249
Number of Molecules:1
Biological Source:Canis lupus familiaris
Polymer Type:polyribonucleotide
Molecule:28S rRNA
Chain IDs:B (auth: 5)
Chain Length:3493
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polyribonucleotide
Molecule:5S ribosomal RNA
Chain IDs:C (auth: 7)
Chain Length:120
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polyribonucleotide
Molecule:5.8S ribosomal RNA
Chain IDs:D (auth: 8)
Chain Length:156
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L8
Gene (Uniprot):ZNF34
Chain IDs:E (auth: A)
Chain Length:245
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:uL3
Gene (Uniprot):RPL3
Chain IDs:F (auth: B)
Chain Length:223
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L4
Gene (Uniprot):RPL4
Chain IDs:G (auth: C)
Chain Length:413
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L5
Chain IDs:H (auth: D)
Chain Length:125
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L6
Gene (Uniprot):RPL6
Chain IDs:I (auth: E)
Chain Length:157
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:uL30
Gene (Uniprot):RPL7
Chain IDs:J (auth: F)
Chain Length:110
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L7a
Gene (Uniprot):RPL7A
Chain IDs:K (auth: G)
Chain Length:129
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L9
Gene (Uniprot):RPL9
Chain IDs:L (auth: H)
Chain Length:123
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L10
Gene (Uniprot):RPL10
Chain IDs:M (auth: I)
Chain Length:214
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L11
Gene (Uniprot):RPL11
Chain IDs:N (auth: J)
Chain Length:178
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L13
Chain IDs:O (auth: L)
Chain Length:210
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L14
Chain IDs:P (auth: M)
Chain Length:52
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L15
Gene (Uniprot):RPL15
Chain IDs:Q (auth: N)
Chain Length:25
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L13a
Chain IDs:R (auth: O)
Chain Length:199
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:uL22
Chain IDs:S (auth: P)
Chain Length:153
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:eL18
Chain IDs:T (auth: Q)
Chain Length:144
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S RIBOSOMAL PROTEIN EL19
Gene (Uniprot):RPL19
Chain IDs:U (auth: R)
Chain Length:180
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L18a
Gene (Uniprot):RPL18A
Chain IDs:V (auth: S)
Chain Length:175
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:eL21
Gene (Uniprot):RPL21
Chain IDs:W (auth: T)
Chain Length:110
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L22
Gene (Uniprot):RPL22
Chain IDs:X (auth: U)
Chain Length:99
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L23
Gene (Uniprot):RPL23
Chain IDs:Y (auth: V)
Chain Length:140
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L24
Gene (Uniprot):RPL24
Chain IDs:Z (auth: W)
Chain Length:86
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:uL23
Gene (Uniprot):RPL23A
Chain IDs:AA (auth: X)
Chain Length:156
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L26
Gene (Uniprot):RPL26
Chain IDs:BA (auth: Y)
Chain Length:145
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L27
Gene (Uniprot):RPL27
Chain IDs:CA (auth: Z)
Chain Length:671
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:uL15
Gene (Uniprot):RPL27A
Chain IDs:DA (auth: a)
Chain Length:245
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L29
Chain IDs:EA (auth: b)
Chain Length:223
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L30
Gene (Uniprot):RPL30
Chain IDs:FA (auth: c)
Chain Length:413
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:eL31
Gene (Uniprot):RPL31
Chain IDs:GA (auth: d)
Chain Length:125
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:eL32
Gene (Uniprot):RPL32
Chain IDs:HA (auth: e)
Chain Length:157
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:eL33
Gene (Uniprot):RPL35A
Chain IDs:IA (auth: f)
Chain Length:110
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L34
Chain IDs:JA (auth: g)
Chain Length:129
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:uL29
Gene (Uniprot):RPL35
Chain IDs:KA (auth: h)
Chain Length:123
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S ribosomal protein L36
Gene (Uniprot):RPL36
Chain IDs:LA (auth: i)
Chain Length:214
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein L37
Gene (Uniprot):RPL37
Chain IDs:MA (auth: j)
Chain Length:178
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:eL38
Chain IDs:NA (auth: k)
Chain Length:69
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:eL39
Gene (Uniprot):RPL39
Chain IDs:OA (auth: l)
Chain Length:210
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60S RIBOSOMAL PROTEIN EL40
Gene (Uniprot):UBA52
Chain IDs:PA (auth: m)
Chain Length:52
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:60s ribosomal protein l41
Gene (Uniprot):RPL41
Chain IDs:QA (auth: n)
Chain Length:25
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:eL42
Chain IDs:RA (auth: o)
Chain Length:199
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:eL43
Gene (Uniprot):RPL37A
Chain IDs:SA (auth: p)
Chain Length:153
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:Signal recognition particle 19
Gene (Uniprot):SRP19
Chain IDs:TA (auth: q)
Chain Length:144
Number of Molecules:1
Biological Source:Canis lupus familiaris
Polymer Type:polypeptide(L)
Molecule:eL28
Gene (Uniprot):RPL28
Chain IDs:UA (auth: r)
Chain Length:180
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Polymer Type:polypeptide(L)
Molecule:Dipeptidyl aminopeptidase B
Gene (Uniprot):DAP2
Chain IDs:VA (auth: s)
Chain Length:175
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Molecule:Signal recognition particle 14 kDa protein
Gene (Uniprot):SRP14
Chain IDs:WA (auth: t)
Chain Length:110
Number of Molecules:1
Biological Source:Canis lupus familiaris
Polymer Type:polypeptide(L)
Molecule:Signal recognition particle subunit SRP68
Gene (Uniprot):SRP68
Chain IDs:XA (auth: u)
Chain Length:99
Number of Molecules:1
Biological Source:Canis lupus familiaris
Polymer Type:polypeptide(L)
Molecule:Signal recognition particle 9 kDa protein
Gene (Uniprot):SRP9
Chain IDs:YA (auth: w)
Chain Length:86
Number of Molecules:1
Biological Source:Canis lupus familiaris
Polymer Type:polypeptide(L)
Molecule:Signal recognition particle 54 kDa protein
Gene (Uniprot):SRP54
Chain IDs:ZA (auth: x)
Chain Length:156
Number of Molecules:1
Biological Source:Canis lupus familiaris
Polymer Type:polypeptide(L)
Molecule:Signal recognition particle subunit SRP72
Gene (Uniprot):SRP72
Chain IDs:AB (auth: z)
Chain Length:671
Number of Molecules:1
Biological Source:Canis lupus familiaris
Primary Citation
Molecular mechanism of cargo recognition and handover by the mammalian signal recognition particle.
Cell Rep 36 109350 109350 (2021)
PMID: 34260909 DOI: 10.1016/j.celrep.2021.109350

Abstact

Co-translational protein targeting to membranes by the signal recognition particle (SRP) is a universally conserved pathway from bacteria to humans. In mammals, SRP and its receptor (SR) have many additional RNA features and protein components compared to the bacterial system, which were recently shown to play regulatory roles. Due to its complexity, the mammalian SRP targeting process is mechanistically not well understood. In particular, it is not clear how SRP recognizes translating ribosomes with exposed signal sequences and how the GTPase activity of SRP and SR is regulated. Here, we present electron cryo-microscopy structures of SRP and SRP·SR in complex with the translating ribosome. The structures reveal the specific molecular interactions between SRP and the emerging signal sequence and the elements that regulate GTPase activity of SRP·SR. Our results suggest the molecular mechanism of how eukaryote-specific elements regulate the early and late stages of SRP-dependent protein targeting.

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Primary Citation of related structures