Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 6-mer - A1B1C1D1E1F1 

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

Macromolecule Content

• Total Structure Weight: 248.00 kDa 
• Atom Count: 15110 
• Modelled Residue Count: 1237 
• Deposited Residue Count: 1436 
• Unique protein chains: 6
• Unique nucleic acid chains: 2

2J37

MODEL OF MAMMALIAN SRP BOUND TO 80S RNCS

• PDB DOI: 10.2210/pdb2J37/pdb
• EM Map EMD-1264: EMDB EMDataResource

• Classification: RIBOSOME
• Organism(s): Triticum sp., Canis sp., Homo sapiens, Haloarcula marismortui
• Mutation(s): No 


• 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: 8.70 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, 2J37


• 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

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
60S RIBOSOMAL PROTEIN L23	A [auth 4]	152	Triticum sp.	Mutation(s): 0
UniProt
Find proteins for O81229 (Zea mays) Explore O81229  Go to UniProtKB:  O81229

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
RIBOSOMAL PROTEIN L35	B [auth 5]	124	Triticum sp.	Mutation(s): 0
UniProt
Find proteins for Q8L805 (Triticum aestivum) Explore Q8L805  Go to UniProtKB:  Q8L805

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
RIBOSOMAL PROTEIN L31	C [auth 6]	123	Triticum sp.	Mutation(s): 0
UniProt
Find proteins for Q5XLD9 (Zea mays) Explore Q5XLD9  Go to UniProtKB:  Q5XLD9

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
SIGNAL RECOGNITION PARTICLE 19 KDA PROTEIN (SRP19)	E [auth B]	108	Homo sapiens	Mutation(s): 0  Gene Names: SRP19
UniProt & NIH Common Fund Data Resources
Find proteins for P09132 (Homo sapiens) Explore P09132  Go to UniProtKB:  P09132
PHAROS:  P09132

Entity ID: 6
Molecule	Chains	Sequence Length	Organism	Details	Image
SIGNAL SEQUENCE	F [auth S]	17	Canis sp.	Mutation(s): 0
UniProt
Find proteins for Q1WHN3 (Alligator sinensis) Explore Q1WHN3  Go to UniProtKB:  Q1WHN3

Entity ID: 7
Molecule	Chains	Sequence Length	Organism	Details	Image
SIGNAL RECOGNITION PARTICLE 54 KDA PROTEIN (SRP54)	G [auth W]	504	Canis sp.	Mutation(s): 0  EC: 3.6.5
UniProt
Find proteins for P61010 (Canis lupus familiaris) Explore P61010  Go to UniProtKB:  P61010

Entity ID: 4
Molecule	Chains	Length	Organism	Image
SRP RNA	D [auth A]	128	Canis sp.

Entity ID: 8
Molecule	Chains	Length	Organism	Image
RIBOSOMAL RNA	H [auth Z]	280	Haloarcula marismortui

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 8.70 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
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-03-07
  Changes: Data collection, Database references, Structure summary
• Version 1.4: 2019-04-10
  Changes: Data collection, Database references, Source and taxonomy