7TGB | pdb_00007tgb

[T:Ag+/Hg2+:T--(pH8.5-pH11; 60s in metals)] Metal-mediated DNA base pair in tensegrity triangle grown at pH 8.5 and soaked in pH 11 with Ag+ and Hg2+ for 60s

• PDB DOI: https://doi.org/10.2210/pdb7TGB/pdb
• NAKB: 7TGB

• Classification: DNA
• Organism(s): synthetic construct
• Mutation(s): No 


• Deposited: 2022-01-07 Released: 2023-02-01 
• Deposition Author(s): Lu, B., Vecchioni, S., Seeman, N.C., Sha, R., Ohayon, Y.P.
• Funding Organization(s): Office of Naval Research (ONR), Department of Energy (DOE, United States), National Science Foundation (NSF, United States), Human Frontier Science Program (HFSP), National Aeronautic Space Administration (NASA, United States)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 5.36 Å
• R-Value Free: 
  0.186 (Depositor), 0.200 (DCC) 
• R-Value Work: 
  0.151 (Depositor), 0.160 (DCC) 
• R-Value Observed: 
  0.152 (Depositor) 

Literature

Electrical control of a metal-mediated DNA memory

Liu, B., Lu, B., De, A., Kim, K., Perren, L., Woloszyn, K., Petrova, G., Li, R., Yang, C.F., Mao, C., Botana, A.S., Ohayon, Y.P., Canary, J.W., Sha, R., Anantram, M., Vecchioni, S., Hihath, J.

(2025) Matter : 102470

• DOI: https://doi.org/10.1016/j.matt.2025.102470

Biological Assembly 1  

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: native gel electrophoresis

Macromolecule Content 

• Total Structure Weight: 13.19 kDa 
• Atom Count: 860 
• Modeled Residue Count: 42 
• Deposited Residue Count: 42 
• Unique nucleic acid chains: 4

Macromolecules

Entity ID: 1
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*GP*AP*GP*CP*AP*GP*CP*CP*TP*GP*TP*TP*TP*GP*GP*AP*CP*AP*TP*CP*A)-3')	A	21	synthetic construct

Entity ID: 2
Molecule	Chains	Length	Organism	Image
DNA (5'-D(P*CP*CP*AP*TP*AP*CP*A)-3')	B	7	synthetic construct

Entity ID: 3
Molecule	Chains	Length	Organism	Image
DNA (5'-D(P*GP*GP*CP*TP*GP*CP*T)-3')	C	7	synthetic construct

Entity ID: 4
Molecule	Chains	Length	Organism	Image
DNA (5'-D(P*CP*TP*GP*AP*TP*GP*T)-3')	D	7	synthetic construct

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HG (Subject of Investigation/LOI)	E [auth B], F [auth B]	MERCURY (II) ION Hg BQPIGGFYSBELGY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 5.36 Å
• R-Value Free:  0.186 (Depositor), 0.200 (DCC) 
• R-Value Work:  0.151 (Depositor), 0.160 (DCC) 
• R-Value Observed: 0.152 (Depositor) 

Space Group: H 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 105.898	α = 90
b = 105.898	β = 90
c = 91.73	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
autoPROC	data reduction
STARANISO	data scaling
AutoSol	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2023-02-01 
Deposition Author(s): Lu, B., Vecchioni, S., Seeman, N.C., Sha, R., Ohayon, Y.P.

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Funding Organization	Location	Grant Number
Office of Naval Research (ONR)	United States	N000141912596
Department of Energy (DOE, United States)	United States	DE-SC0007991
National Science Foundation (NSF, United States)	United States	2106790
Human Frontier Science Program (HFSP)	United States	RPG0010/2017
National Science Foundation (NSF, United States)	United States	DMR-1420073
National Aeronautic Space Administration (NASA, United States)	United States	2020 NASA Center Innovation Fund

Revision History  

• Version 1.0: 2023-02-01
  Type: Initial release
  
• Version 1.1: 2024-05-22
  Changes: Data collection
• Version 1.2: 2025-12-31
  Changes: Database references, Structure summary