4P3E

Structure of the human SRP S domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.246 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

SRP RNA remodeling by SRP68 explains its role in protein translocation.

Grotwinkel, J.T.Wild, K.Segnitz, B.Sinning, I.

(2014) Science 344: 101-104

  • DOI: 10.1126/science.1249094
  • Primary Citation of Related Structures:  
    4P3E, 4P3F, 4P3G

  • PubMed Abstract: 
  • The signal recognition particle (SRP) is central to membrane protein targeting; SRP RNA is essential for SRP assembly, elongation arrest, and activation of SRP guanosine triphosphatases. In eukaryotes, SRP function relies on the SRP68-SRP72 heterodimer. We present the crystal structures of the RNA-binding domain of SRP68 (SRP68-RBD) alone and in complex with SRP RNA and SRP19 ...

    The signal recognition particle (SRP) is central to membrane protein targeting; SRP RNA is essential for SRP assembly, elongation arrest, and activation of SRP guanosine triphosphatases. In eukaryotes, SRP function relies on the SRP68-SRP72 heterodimer. We present the crystal structures of the RNA-binding domain of SRP68 (SRP68-RBD) alone and in complex with SRP RNA and SRP19. SRP68-RBD is a tetratricopeptide-like module that binds to a RNA three-way junction, bends the RNA, and inserts an α-helical arginine-rich motif (ARM) into the major groove. The ARM opens the conserved 5f RNA loop, which in ribosome-bound SRP establishes a contact to ribosomal RNA. Our data provide the structural basis for eukaryote-specific, SRP68-driven RNA remodeling required for protein translocation.


    Organizational Affiliation

    Heidelberg University Biochemistry Center (BZH), INF 328, D-69120 Heidelberg, Germany.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Signal recognition particle 19 kDa proteinB128Homo sapiensMutation(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
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Signal recognition particle subunit SRP68C216Homo sapiensMutation(s): 1 
Gene Names: SRP68
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UHB9 (Homo sapiens)
Explore Q9UHB9 
Go to UniProtKB:  Q9UHB9
PHAROS:  Q9UHB9
Protein Feature View
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  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsLengthOrganismImage
SRP RNA (124-mer)A125Homo sapiens
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.246 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 125.649α = 90
b = 70.53β = 100.46
c = 106.493γ = 90
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanySFB638

Revision History  (Full details and data files)

  • Version 1.0: 2014-04-16
    Type: Initial release
  • Version 1.1: 2014-04-23
    Changes: Data collection
  • Version 1.2: 2014-07-09
    Changes: Structure summary
  • Version 1.3: 2017-09-27
    Changes: Author supporting evidence, Database references, Derived calculations, Other, Refinement description, Source and taxonomy, Structure summary
  • Version 1.4: 2020-01-08
    Changes: Author supporting evidence