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- PDB-3kl4: Recognition of a signal peptide by the signal recognition particle -
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Open data
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Basic information
Entry | Database: PDB / ID: 3kl4 | ||||||
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Title | Recognition of a signal peptide by the signal recognition particle | ||||||
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![]() | HYDROLASE / signal recognition particle / SRP / SRP54 / Ffh / signal sequence / signal peptide / GTP-binding / Nucleotide-binding / Ribonucleoprotein / RNA-binding / Signal-anchor / Transmembrane | ||||||
Function / homology | ![]() Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / Hydrolases; Acting on peptide bonds (peptidases); Dipeptidyl-peptidases and tripeptidyl-peptidases / signal recognition particle / signal-recognition-particle GTPase / 7S RNA binding / SRP-dependent cotranslational protein targeting to membrane / fungal-type vacuole membrane / dipeptidyl-peptidase activity / aminopeptidase activity / protein processing ...Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / Hydrolases; Acting on peptide bonds (peptidases); Dipeptidyl-peptidases and tripeptidyl-peptidases / signal recognition particle / signal-recognition-particle GTPase / 7S RNA binding / SRP-dependent cotranslational protein targeting to membrane / fungal-type vacuole membrane / dipeptidyl-peptidase activity / aminopeptidase activity / protein processing / serine-type endopeptidase activity / GTPase activity / GTP binding / ATP hydrolysis activity / proteolysis / plasma membrane Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() ![]() | ||||||
Method | ![]() ![]() ![]() | ||||||
![]() | Janda, C.Y. / Nagai, K. / Li, J. / Oubridge, C. | ||||||
![]() | ![]() Title: Recognition of a signal peptide by the signal recognition particle. Authors: Janda, C.Y. / Li, J. / Oubridge, C. / Hernandez, H. / Robinson, C.V. / Nagai, K. #1: ![]() Title: Crystal structure of the signal sequence binding subunit of the signal recognition particle. Authors: Keenan, R.J. / Freymann, D.M. / Walter, P. / Stroud, R.M. #2: ![]() Title: Crystal structure of the complete core of archaeal signal recognition particle and implications for interdomain communication. Authors: Rosendal, K.R. / Wild, K. / Montoya, G. / Sinning, I. #3: ![]() Title: Crystal structure of the ribonucleoprotein core of the signal recognition particle. Authors: Batey, R.T. / Rambo, R.P. / Lucast, L. / Rha, B. / Doudna, J.A. #4: ![]() Title: The crystal structure of the conserved GTPase of SRP54 from the archaeon Acidianus ambivalens and its comparison with related structures suggests a model for the SRP-SRP receptor complex. Authors: Montoya, G. / Kaat, K. / Moll, R. / Schafer, G. / Sinning, I. #5: ![]() Title: Following the signal sequence from ribosomal tunnel exit to signal recognition particle. Authors: Mario Halic / Michael Blau / Thomas Becker / Thorsten Mielke / Martin R Pool / Klemens Wild / Irmgard Sinning / Roland Beckmann / ![]() Abstract: Membrane and secretory proteins can be co-translationally inserted into or translocated across the membrane. This process is dependent on signal sequence recognition on the ribosome by the signal ...Membrane and secretory proteins can be co-translationally inserted into or translocated across the membrane. This process is dependent on signal sequence recognition on the ribosome by the signal recognition particle (SRP), which results in targeting of the ribosome-nascent-chain complex to the protein-conducting channel at the membrane. Here we present an ensemble of structures at subnanometre resolution, revealing the signal sequence both at the ribosomal tunnel exit and in the bacterial and eukaryotic ribosome-SRP complexes. Molecular details of signal sequence interaction in both prokaryotic and eukaryotic complexes were obtained by fitting high-resolution molecular models. The signal sequence is presented at the ribosomal tunnel exit in an exposed position ready for accommodation in the hydrophobic groove of the rearranged SRP54 M domain. Upon ribosome binding, the SRP54 NG domain also undergoes a conformational rearrangement, priming it for the subsequent docking reaction with the NG domain of the SRP receptor. These findings provide the structural basis for improving our understanding of the early steps of co-translational protein sorting. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 96.5 KB | Display | ![]() |
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PDB format | ![]() | 74.3 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Summary document | ![]() | 438.8 KB | Display | ![]() |
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Full document | ![]() | 470.3 KB | Display | |
Data in XML | ![]() | 21.3 KB | Display | |
Data in CIF | ![]() | 28.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | |
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Similar structure data |
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Assembly
Deposited unit | ![]()
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Unit cell |
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Details | Biological unit is the same as asymmetric unit. |
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Components
#1: Protein | Mass: 48503.363 Da / Num. of mol.: 1 / Fragment: UNP residues 2-432 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() References: UniProt: Q97ZE7, signal-recognition-particle GTPase |
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#2: Protein/peptide | Mass: 4533.361 Da / Num. of mol.: 1 / Fragment: UNP residues 26-51 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Plasmid: pET15b / Production host: ![]() ![]() References: UniProt: P18962, Hydrolases; Acting on peptide bonds (peptidases); Dipeptidyl-peptidases and tripeptidyl-peptidases |
-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.65 Å3/Da / Density % sol: 53.61 % |
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Crystal grow | Temperature: 295 K / Method: vapor diffusion / pH: 5.5 Details: 5-7 % PEG 4000, 100 mM Bis-Tris, 100 mM NaCl, 5-50 mM Mg(OAc)2, 2 % Polypropylene glycol P400. Crystals were obtained by seeding, pH 5.5, VAPOR DIFFUSION, temperature 295K |
-Data collection
Diffraction |
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Detector |
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Radiation |
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Radiation wavelength |
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Reflection | Resolution: 3.5→58.42 Å / Num. all: 7683 / Num. obs: 7683 / % possible obs: 99.9 % / Observed criterion σ(I): 0 / Redundancy: 26.7 % / Biso Wilson estimate: 103.9 Å2 / Rmerge(I) obs: 0.081 / Net I/σ(I): 29.2 | ||||||||||||||||||
Reflection shell | Resolution: 3.5→3.69 Å / Redundancy: 27.1 % / Rmerge(I) obs: 0.762 / Mean I/σ(I) obs: 5.1 / Num. unique all: 1098 / % possible all: 100 |
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Processing
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Refinement | Method to determine structure: ![]()
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Displacement parameters | Biso mean: 151.852 Å2
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Refine analyze |
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Refinement step | Cycle: LAST / Resolution: 3.5→58.42 Å
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Refine LS restraints |
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LS refinement shell | Refine-ID: X-RAY DIFFRACTION / Total num. of bins used: 10
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