1NTL

Model of mouse Crry-Ig determined by solution scattering, curve fitting and homology modelling


Experimental Data Snapshot

ERROR: Experimental Data Snapshots data not found.

wwPDB Validation

Currently 1NTL does not have a wwPDB validation report.


This is version 1.5 of the entry. See complete history

Literature

The extended multidomain solution structures of the complement protein Crry and its chimaeric conjugate Crry-Ig by scattering, analytical ultracentrifugation and constrained modelling: implications for function and therapy

Aslam, M.Guthridge, J.M.Hack, B.K.Quigg, R.J.Holers, V.M.Perkins, S.J.

(2003) J.Mol.Biol. 329: 525-550

  • Primary Citation of Related Structures:  1NTJ

  • PubMed Abstract: 
  • Complement receptor-related gene/protein y (Crry) is a cell membrane-bound regulator of complement activation found in mouse and rat. Crry contains only short complement/consensus repeat (SCR) domains. X-ray and neutron scattering was performed on re ...

    Complement receptor-related gene/protein y (Crry) is a cell membrane-bound regulator of complement activation found in mouse and rat. Crry contains only short complement/consensus repeat (SCR) domains. X-ray and neutron scattering was performed on recombinant rat Crry containing the first five SCR domains (rCrry) and mouse Crry with five SCR domains conjugated to the Fc fragment of mouse IgG1 (mCrry-Ig) in order to determine their solution structures at medium resolution. The radius of gyration R(G) of rCrry was determined to be 4.9-5.0 nm, and the R(G) of the cross-section was 1.2-1.5 nm as determined by X-ray and neutron scattering. The R(G) of mCrry-Ig was 6.6-6.7 nm, and the R(G) of the cross-section were 2.3-2.4 nm and 1.3 nm. The maximum dimension of rCrry was 18 nm and that for mCrry-Ig was 26 nm. The neutron data indicated that rCrry and mCrry-Ig have molecular mass values of 45,000 Da and 140,000 Da, respectively, in agreement with their sequences, and sedimentation equilibrium data supported these determinations. Time-derivative velocity experiments gave sedimentation coefficients of 2.4S for rCrry and 5.4S for mCrry-Ig. A medium-resolution model of rCrry was determined using homology models that were constructed for the first five SCR domains of Crry from known crystal and NMR structures, and linked by randomly generated linker peptide conformations. These trial-and-error calculations revealed a small family of extended rCrry structures that best accounted for the scattering and ultracentrifugation data. These were shorter than the most extended rCrry models as the result of minor bends in the inter-SCR orientations. The mCrry-Ig solution data were modelled starting from a fixed structure for rCrry and the crystal structure of mouse IgG1, and was based on conformational searches of the hinge peptide joining the mCrry and Fc fragments. The best-fit models showed that the two mCrry antennae in mCrry-Ig were extended from the Fc fragment. No preferred orientation of the antennae was identified, and this indicated that the accessibility of the antennae for the molecular targets C4b and C3b was not affected by the covalent link to Fc. A structural comparison between Crry and complement receptor type 1 indicated that the domain arrangement of Crry SCR 1-3 is as extended as that of the CR1 SCR 15-17 NMR structure.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Darwin Building, University College London, Gower Street, London WC1E 6BT, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Complement component receptor 1-like protein,Ig gamma-1 chain C region secreted form
A, B
551Mus musculusGene Names: Ighg1 (Igh-4)
Find proteins for P01868 (Mus musculus)
Go to UniProtKB:  P01868
Experimental Data & Validation

Experimental Data

ERROR: Experimental Data Snapshots data not found.
Software Package:
Software NamePurpose
SPOLLYdata reduction
SPOLLYdata scaling
Insight IImodel building
COLLETTEdata reduction
SCTPL5model building
GNOMmodel building
COLLETTEdata scaling
DETECTORdata collection
OTOKOdata reduction
GNOMphasing
SCTPLphasing
DETECTORdata reduction
OTOKOdata scaling
DISCOVERrefinement

Structure Validation

Currently 1NTL does not have a wwPDB validation report.



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-02-03
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2016-08-31
    Type: Other
  • Version 1.4: 2017-06-28
    Type: Database references, Source and taxonomy, Structure summary
  • Version 1.5: 2017-10-11
    Type: Refinement description