3IK5

SIVmac239 Nef in complex with TCR zeta ITAM 1 polypeptide (A63-R80)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.184 
  • R-Value Work: 0.170 

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This is version 1.3 of the entry. See complete history

Literature

Pseudo-merohedral twinning and noncrystallographic symmetry in orthorhombic crystals of SIVmac239 Nef core domain bound to different-length TCRzeta fragments.

Kim, W.M.Sigalov, A.B.Stern, L.J.

(2010) Acta Crystallogr.,Sect.D 66: 163-175

  • DOI: 10.1107/S090744490904880X
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • HIV/SIV Nef mediates many cellular processes through interactions with various cytoplasmic and membrane-associated host proteins, including the signalling zeta subunit of the T-cell receptor (TCRzeta). Here, the crystallization strategy, methods and ...

    HIV/SIV Nef mediates many cellular processes through interactions with various cytoplasmic and membrane-associated host proteins, including the signalling zeta subunit of the T-cell receptor (TCRzeta). Here, the crystallization strategy, methods and refinement procedures used to solve the structures of the core domain of the SIVmac239 isolate of Nef (Nef(core)) in complex with two different TCRzeta fragments are described. The structure of SIVmac239 Nef(core) bound to the longer TCRzeta polypeptide (Leu51-Asp93) was determined to 3.7 A resolution (R(work) = 28.7%) in the tetragonal space group P4(3)2(1)2. The structure of SIVmac239 Nef(core) in complex with the shorter TCRzeta polypeptide (Ala63-Arg80) was determined to 2.05 A resolution (R(work) = 17.0%), but only after the detection of nearly perfect pseudo-merohedral crystal twinning and proper assignment of the orthorhombic space group P2(1)2(1)2(1). The reduction in crystal space-group symmetry induced by the truncated TCRzeta polypeptide appears to be caused by the rearrangement of crystal-contact hydrogen-bonding networks and the substitution of crystallographic symmetry operations by similar noncrystallographic symmetry (NCS) operations. The combination of NCS rotations that were nearly parallel to the twin operation (k, h, -l) and a and b unit-cell parameters that were nearly identical predisposed the P2(1)2(1)2(1) crystal form to pseudo-merohedral twinning.


    Organizational Affiliation

    University of Massachusetts Medical School, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein Nef
A, C
143Simian immunodeficiency virus (isolate 1A11)Mutation(s): 0 
Gene Names: nef
Find proteins for P31818 (Simian immunodeficiency virus (isolate 1A11))
Go to UniProtKB:  P31818
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
T-cell surface glycoprotein CD3 zeta chain
D, B
18Homo sapiensMutation(s): 0 
Gene Names: CD247 (CD3Z, T3Z, TCRZ)
Find proteins for P20963 (Homo sapiens)
Go to Gene View: CD247
Go to UniProtKB:  P20963
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.184 
  • R-Value Work: 0.170 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 47.417α = 90.00
b = 47.421β = 90.00
c = 183.520γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
PDB_EXTRACTdata extraction
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2012-03-28
    Type: Database references
  • Version 1.3: 2017-11-01
    Type: Refinement description