6O5W | pdb_00006o5w

Crystal structure of MORC3 CW domain fused with viral influenza A NS1 peptide

• PDB DOI: https://doi.org/10.2210/pdb6O5W/pdb

• Classification: TRANSCRIPTION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2019-03-04 Released: 2019-05-08 
• Deposition Author(s): Ahn, J., Zhang, Y., Vann, K.R., Kutateleadze, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.41 Å
• R-Value Free: 
  0.169 (Depositor), 0.170 (DCC) 
• R-Value Work: 
  0.153 (Depositor), 0.153 (DCC) 
• R-Value Observed: 
  0.154 (Depositor) 

Starting Model: experimental

Literature

MORC3 Is a Target of the Influenza A Viral Protein NS1.

Zhang, Y., Ahn, J., Green, K.J., Vann, K.R., Black, J., Brooke, C.B., Kutateladze, T.G.

(2019) Structure 27: 1029-1033.e3

• PubMed: 31006586 
• DOI: https://doi.org/10.1016/j.str.2019.03.015
• Primary Citation Related Structures: 
  6O5W


• PubMed Abstract: 
  

  Microrchidia 3 (MORC3), a human ATPase linked to several autoimmune disorders, has been characterized both as a negative and positive regulator of influenza A virus. Here, we report that the CW domain of MORC3 (MORC3-CW) is targeted by the C-terminal tail of the influenza H3N2 protein NS1. The crystal structure of the MORC3-CW:NS1 complex shows that NS1 occupies the same binding site in CW that is normally occupied by histone H3, a physiological ligand of MORC3-CW. Comparable binding affinities of MORC3-CW to H3 and NS1 peptides and to the adjacent catalytic ATPase domain suggest that the viral protein can compete with the host histone for the association with CW, releasing MORC3 autoinhibition and activating the catalytic function of MORC3. Our structural, biochemical, and cellular analyses suggest that MORC3 might affect the infectivity of influenza virus and therefore has a role in cell immune response.

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Organizational Affiliation: 
• Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO 80045, USA.
Department of Microbiology, University of Illinois, Urbana, IL 61801, USA.
Department of Microbiology, University of Illinois, Urbana, IL 61801, USA; Carl R. Woese Institute for Genomic Biology, University of Illinois, Urbana, IL 61801, USA.
Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO 80045, USA. Electronic address: [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 6.86 kDa 
• Atom Count: 615 
• Modeled Residue Count: 57 
• Deposited Residue Count: 59 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
NS1-linked peptide,MORC family CW-type zinc finger protein 3	A	59	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for Q14149 (Homo sapiens) Explore Q14149  Go to UniProtKB:  Q14149
PHAROS:  Q14149 GTEx:  ENSG00000159256

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	B [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.41 Å
• R-Value Free:  0.169 (Depositor), 0.170 (DCC) 
• R-Value Work:  0.153 (Depositor), 0.153 (DCC) 
• R-Value Observed: 0.154 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 30.912	α = 90
b = 37.424	β = 90
c = 50.314	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-3000	data reduction
SCALEPACK	data scaling
AutoSol	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2019-05-08 
Deposition Author(s): Ahn, J., Zhang, Y., Vann, K.R., Kutateleadze, T.

Revision History  

• Version 1.0: 2019-05-08
  Type: Initial release
  
• Version 1.1: 2019-06-12
  Changes: Data collection, Database references
• Version 1.2: 2023-10-11
  Changes: Data collection, Database references, Refinement description