6BRG

The SAM domain of mouse SAMHD1 is critical for its activation and regulation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.244 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

The SAM domain of mouse SAMHD1 is critical for its activation and regulation.

Buzovetsky, O.Tang, C.Knecht, K.M.Antonucci, J.M.Wu, L.Ji, X.Xiong, Y.

(2018) Nat Commun 9: 411-411

  • DOI: 10.1038/s41467-017-02783-8
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Human SAMHD1 (hSAMHD1) is a retroviral restriction factor that blocks HIV-1 infection by depleting the cellular nucleotides required for viral reverse transcription. SAMHD1 is allosterically activated by nucleotides that induce assembly of the active ...

    Human SAMHD1 (hSAMHD1) is a retroviral restriction factor that blocks HIV-1 infection by depleting the cellular nucleotides required for viral reverse transcription. SAMHD1 is allosterically activated by nucleotides that induce assembly of the active tetramer. Although the catalytic core of hSAMHD1 has been studied extensively, previous structures have not captured the regulatory SAM domain. Here we report the crystal structure of full-length SAMHD1 by capturing mouse SAMHD1 (mSAMHD1) structures in three different nucleotide bound states. Although mSAMHD1 and hSAMHD1 are highly similar in sequence and function, we find that mSAMHD1 possesses a more complex nucleotide-induced activation process, highlighting the regulatory role of the SAM domain. Our results provide insights into the regulation of SAMHD1 activity, thereby facilitating the improvement of HIV mouse models and the development of new therapies for certain cancers and autoimmune diseases.


    Organizational Affiliation

    Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, 06520, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Deoxynucleoside triphosphate triphosphohydrolase SAMHD1
A, B, C, D
672Mus musculusMutation(s): 0 
Gene Names: Samhd1 (Mg11)
EC: 3.1.5.-
Find proteins for Q60710 (Mus musculus)
Go to UniProtKB:  Q60710
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A, B, C, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.244 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 164.582α = 90.00
b = 109.919β = 105.78
c = 162.089γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-02-14
    Type: Initial release