3GW6

Intramolecular Chaperone


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.211 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Crystal structure of an intramolecular chaperone mediating triple-beta-helix folding.

Schulz, E.C.Dickmanns, A.Urlaub, H.Schmitt, A.Muhlenhoff, M.Stummeyer, K.Schwarzer, D.Gerardy-Schahn, R.Ficner, R.

(2010) Nat Struct Mol Biol 17: 210-215

  • DOI: 10.1038/nsmb.1746
  • Primary Citation of Related Structures:  
    3GUD, 3GW6

  • PubMed Abstract: 
  • Protein folding is often mediated by molecular chaperones. Recently, a novel class of intramolecular chaperones has been identified in tailspike proteins of evolutionarily distant viruses, which require a C-terminal chaperone for correct folding. The highly homologous chaperone domains are interchangeable between pre-proteins and release themselves after protein folding ...

    Protein folding is often mediated by molecular chaperones. Recently, a novel class of intramolecular chaperones has been identified in tailspike proteins of evolutionarily distant viruses, which require a C-terminal chaperone for correct folding. The highly homologous chaperone domains are interchangeable between pre-proteins and release themselves after protein folding. Here we report the crystal structures of two intramolecular chaperone domains in either the released or the pre-cleaved form, revealing the role of the chaperone domain in the formation of a triple-beta-helix fold. Tentacle-like protrusions enclose the polypeptide chains of the pre-protein during the folding process. After the assembly, a sensory mechanism for correctly folded beta-helices triggers a serine-lysine catalytic dyad to autoproteolytically release the mature protein. Sequence analysis shows a conservation of the intramolecular chaperones in functionally unrelated proteins sharing beta-helices as a common structural motif.


    Organizational Affiliation

    Abteilung für Molekulare Strukturbiologie, Institut für Mikrobiologie und Genetik, Georg-August-Universität Göttingen, Göttingen, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Endo-N-acetylneuraminidase275Escherichia phage K1FMutation(s): 0 
Gene Names: sia1717.0
EC: 3.2.1.129
UniProt
Find proteins for Q04830 (Escherichia phage K1F)
Explore Q04830 
Go to UniProtKB:  Q04830
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ04830
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TAM
Query on TAM

Download Ideal Coordinates CCD File 
DA [auth C],
I [auth A],
J [auth A]
TRIS(HYDROXYETHYL)AMINOMETHANE
C7 H17 N O3
GKODZWOPPOTFGA-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

Download Ideal Coordinates CCD File 
CA [auth C],
EA [auth C],
G [auth A],
GA [auth D],
H [auth A],
CA [auth C],
EA [auth C],
G [auth A],
GA [auth D],
H [auth A],
JA [auth F],
KA [auth F],
LA [auth F],
M [auth B],
MA [auth F],
P [auth E],
Q [auth E],
R [auth E],
S [auth E],
T [auth E],
U [auth E],
V [auth E],
Y [auth C]
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
BR
Query on BR

Download Ideal Coordinates CCD File 
L [auth B],
N [auth B],
NA [auth F],
O [auth B],
W [auth E],
L [auth B],
N [auth B],
NA [auth F],
O [auth B],
W [auth E],
Z [auth C]
BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
IA [auth F]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
AA [auth C],
BA [auth C],
FA [auth D],
HA [auth D],
K [auth A],
AA [auth C],
BA [auth C],
FA [auth D],
HA [auth D],
K [auth A],
X [auth E]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.211 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.65α = 81.71
b = 79.95β = 76.53
c = 109.58γ = 87.11
Software Package:
Software NamePurpose
XSCALEdata processing
PHENIXrefinement
PDB_EXTRACTdata extraction
MAR345dtbdata collection
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance