4QPY

Crystal structure of C1QL2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.172 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structures of C1q-like Proteins Reveal Unique Features among the C1q/TNF Superfamily.

Ressl, S.Vu, B.K.Vivona, S.Martinelli, D.C.Sudhof, T.C.Brunger, A.T.

(2015) Structure 23: 688-699

  • DOI: 10.1016/j.str.2015.01.019
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • C1q-like (C1QL) -1, -2, and -3 proteins are encoded by homologous genes that are highly expressed in brain. C1QLs bind to brain-specific angiogenesis inhibitor 3 (BAI3), an adhesion-type G-protein coupled receptor that may regulate dendritic morpholo ...

    C1q-like (C1QL) -1, -2, and -3 proteins are encoded by homologous genes that are highly expressed in brain. C1QLs bind to brain-specific angiogenesis inhibitor 3 (BAI3), an adhesion-type G-protein coupled receptor that may regulate dendritic morphology by organizing actin filaments. To begin to understand the function of C1QLs, we determined high-resolution crystal structures of the globular C1q-domains of C1QL1, C1QL2, and C1QL3. Each structure is a trimer, with each protomer forming a jelly-roll fold consisting of 10 β strands. Moreover, C1QL trimers may assemble into higher-order oligomers similar to adiponectin and contain four Ca(2+)-binding sites along the trimeric symmetry axis, as well as additional surface Ca(2+)-binding sites. Mutation of Ca(2+)-coordinating residues along the trimeric symmetry axis lowered the Ca(2+)-binding affinity and protein stability. Our results reveal unique structural features of C1QLs among C1q/TNF superfamily proteins that may be associated with their specific brain functions.


    Organizational Affiliation

    Department of Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, USA; Howard Hughes Medical Institute, Stanford, CA 94305, USA; Departments of Neurology and Neurological Sciences, Photon Science, and Structural Biology, Stanford University, Stanford, CA 94305, USA. Electronic address: brunger@stanford.edu.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Complement C1q-like protein 2A, B, C136Mus musculusMutation(s): 0 
Gene Names: C1ql2C1qtnf10Ctrp10
Find proteins for Q8CFR0 (Mus musculus)
Explore Q8CFR0 
Go to UniProtKB:  Q8CFR0
NIH Common Fund Data Resources
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.172 
  • Space Group: F 4 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 225.62α = 90
b = 225.62β = 90
c = 225.62γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-04-15
    Type: Initial release
  • Version 1.1: 2015-05-06
    Changes: Database references