2C4B

Inhibitor cystine knot protein McoEeTI fused to the catalytically inactive barnase mutant H102A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.164 
  • R-Value Work: 0.132 
  • R-Value Observed: 0.133 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Barnase Fusion as a Tool to Determine the Crystal Structure of the Small Disulfide-Rich Protein Mcoeeti.

Niemann, H.H.Schmoldt, H.U.Wentzel, A.Kolmar, H.Heinz, D.W.

(2006) J Mol Biol 356: 1

  • DOI: 10.1016/j.jmb.2005.11.005
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • We present a fusion system suited to determine the crystal structure of small disulfide-rich proteins. McoEeTI, a hybrid inhibitor cystine knot microprotein, was produced as a soluble fusion to a catalytically inactive variant of the RNAse barnase in ...

    We present a fusion system suited to determine the crystal structure of small disulfide-rich proteins. McoEeTI, a hybrid inhibitor cystine knot microprotein, was produced as a soluble fusion to a catalytically inactive variant of the RNAse barnase in Escherichia coli. Functioning as a versatile tag, barnase facilitated purification, crystallization and high-resolution structure determination. Flexibility of the linker region allows for different relative orientations of barnase and the fusion partner in two crystallographically independent molecules and may thereby facilitate crystal packing. Nevertheless, the linker region is well ordered in both molecules. This system may prove more generally useful to determine the crystal structure of peptides and small proteins.


    Organizational Affiliation

    Division of Structural Biology, German Research Centre for Biotechnology (GBF) Mascheroder Weg 1, D-38124 Braunschweig, Germany. hartmut.niemann@gbf.de



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BARNASE MCOEETI FUSIONA, B143Bacillus amyloliquefaciensMomordica cochinchinensisEcballium elaterium
This entity is chimeric
Mutation(s): 1 
EC: 3.1.27.3 (PDB Primary Data), 3.1.27 (UniProt)
Find proteins for P82409 (Momordica cochinchinensis)
Explore P82409 
Go to UniProtKB:  P82409
Find proteins for P00648 (Bacillus amyloliquefaciens)
Explore P00648 
Go to UniProtKB:  P00648
Find proteins for P12071 (Ecballium elaterium)
Explore P12071 
Go to UniProtKB:  P12071
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
2PE
Query on 2PE

Download CCD File 
A, B
NONAETHYLENE GLYCOL
C18 H38 O10
YZUUTMGDONTGTN-UHFFFAOYSA-N
 Ligand Interaction
MES
Query on MES

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B
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

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A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

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A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

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A, B
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
FMT
Query on FMT

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A, B
FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N
 Ligand Interaction
UNX
Query on UNX

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A
UNKNOWN ATOM OR ION
X
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.164 
  • R-Value Work: 0.132 
  • R-Value Observed: 0.133 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.02α = 90
b = 217.71β = 90
c = 58.34γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
EPMRphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-11-21
    Type: Initial release
  • Version 1.1: 2019-04-03
    Changes: Advisory, Data collection, Derived calculations, Experimental preparation
  • Version 1.2: 2019-05-08
    Changes: Data collection, Experimental preparation