7LGA

PEG10 CA-like C-terminal domain

• PDB DOI: https://doi.org/10.2210/pdb7LGA/pdb

• Classification: ONCOPROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2021-01-19 Released: 2021-10-06 
• Deposition Author(s): Zurowska, K., Pornillos, O., Ganser-Pornillos, B.K.
• Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.209 
• R-Value Work: 0.182 
• R-Value Observed: 0.184 

Literature

Structural evidence that MOAP1 and PEG10 are derived from retrovirus/retrotransposon Gag proteins.

Zurowska, K., Alam, A., Ganser-Pornillos, B.K., Pornillos, O.

(2022) Proteins 90: 309-313

• PubMed: 34357660 
• DOI: https://doi.org/10.1002/prot.26204
• Primary Citation of Related Structures:  
  7LGA, 7LGC


• PubMed Abstract: 
  

  The Gag proteins of retroviruses play an essential role in virus particle assembly by forming a protein shell or capsid and thus generating the virion compartment. A variety of human proteins have now been identified with structural similarity to one or more of the major Gag domains. These human proteins are thought to have been evolved or "domesticated" from ancient integrations due to retroviral infections or retrotransposons. Here, we report that X-ray crystal structures of stably folded domains of MOAP1 (modulator of apoptosis 1) and PEG10 (paternally expressed gene 10) are highly similar to the C-terminal capsid (CA) domains of cognate Gag proteins. The structures confirm classification of MOAP1 and PEG10 as domesticated Gags, and suggest that these proteins may have preserved some of the key interactions that facilitated assembly of their ancestral Gags into capsids.

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Organizational Affiliation: 

Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: homology

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 46.81 kDa 
• Atom Count: 2,960 
• Modelled Residue Count: 347 
• Deposited Residue Count: 404 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Retrotransposon-derived protein PEG10	A, B, C [auth D], D [auth E]	101	Homo sapiens	Mutation(s): 0  Gene Names: PEG10, EDR, KIAA1051, MAR2, MART2, MEF3L1, RGAG3
UniProt & NIH Common Fund Data Resources
Find proteins for Q86TG7 (Homo sapiens) Explore Q86TG7  Go to UniProtKB:  Q86TG7
PHAROS:  Q86TG7 GTEx:  ENSG00000242265

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A, B, C [auth D], D [auth E]	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.209 
• R-Value Work: 0.182 
• R-Value Observed: 0.184 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.598	α = 90
b = 70.289	β = 98.102
c = 52.689	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHENIX	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2021-10-06 
Deposition Author(s): Zurowska, K., Pornillos, O., Ganser-Pornillos, B.K.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	R01-AI129678

Revision History  

• Version 1.0: 2021-10-06
  Type: Initial release
  
• Version 1.1: 2021-12-29
  Changes: Database references