Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 5-mer - ABCDE 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 248003.98 
• Atom Count: 15110 
• Residue Count: 1436 
• Unique protein chains: 6
• Unique nucleic acid chains: 2

2J37

MODEL OF MAMMALIAN SRP BOUND TO 80S RNCS

• DOI: 10.2210/pdb2J37/pdb
• EMDataResource: EMD-1264

• Classification: RIBOSOME
• Organism(s): Canis sp., Alligator sinensis, Zea mays, Canis lupus familiaris, Homo sapiens, Haloarcula marismortui, Triticum aestivum


• Deposited: 2006-08-18 Released: 2006-11-08 
• Deposition Author(s): Halic, M., Blau, M., Becker, T., Mielke, T., Pool, M.R., Wild, K., Sinning, I., Beckmann, R.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 8.7 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Following the signal sequence from ribosomal tunnel exit to signal recognition particle.

Halic, M., Blau, M., Becker, T., Mielke, T., Pool, M.R., Wild, K., Sinning, I., Beckmann, R.

(2006) Nature 444: 507-511

• PubMed: 17086193 
• DOI: 10.1038/nature05326
• Primary Citation of Related Structures:  
  2J28
• Also Cited By: 3KL4


• PubMed 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 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.

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Organizational Affiliation: 

Gene Center, Department of Chemistry and Biochemistry, University of Munich, Feodor-Lynen-Strasse 25, 81377 Munich, Germany.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
60S RIBOSOMAL PROTEIN L23	4	152	Zea mays	Mutation(s): 0
Find proteins for O81229 (Zea mays) Go to UniProtKB:  O81229

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
RIBOSOMAL PROTEIN L35	5	124	Triticum aestivum	Mutation(s): 0  Gene Names: RPL35
Find proteins for Q8L805 (Triticum aestivum) Go to Gene View: RPL35 Go to UniProtKB:  Q8L805

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
RIBOSOMAL PROTEIN L31	6	123	Zea mays	Mutation(s): 0
Find proteins for Q5XLD9 (Zea mays) Go to UniProtKB:  Q5XLD9

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details
SIGNAL RECOGNITION PARTICLE 19 KDA PROTEIN (SRP19)	B	108	Homo sapiens	Mutation(s): 0  Gene Names: SRP19
Find proteins for P09132 (Homo sapiens) Go to Gene View: SRP19 Go to UniProtKB:  P09132

Entity ID: 6
Molecule	Chains	Sequence Length	Organism	Details
SIGNAL SEQUENCE	S	17	Alligator sinensis	Mutation(s): 0
Find proteins for Q1WHN3 (Alligator sinensis) Go to UniProtKB:  Q1WHN3

Entity ID: 7
Molecule	Chains	Sequence Length	Organism	Details
SIGNAL RECOGNITION PARTICLE 54 KDA PROTEIN (SRP54)	W	504	Canis lupus familiaris	Mutation(s): 0  Gene Names: SRP54
Find proteins for P61010 (Canis lupus familiaris) Go to Gene View: SRP54 Go to UniProtKB:  P61010

Entity ID: 4
Molecule	Chains	Length	Organism
SRP RNA	A	128	Canis sp.

Entity ID: 8
Molecule	Chains	Length	Organism
RIBOSOMAL RNA	Z	280	Haloarcula marismortui

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 8.7 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-08-18 
• Released Date: 2006-11-08 
• Deposition Author(s): Halic, M., Blau, M., Becker, T., Mielke, T., Pool, M.R., Wild, K., Sinning, I., Beckmann, R.

Revision History 

• Version 1.0: 2006-11-08
  Type: Initial release
• Version 1.1: 2011-05-08
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2018-03-07
  Type: Data collection, Database references, Structure summary
• Version 1.4: 2019-04-10
  Type: Data collection, Database references, Source and taxonomy