7XLW image
Entry Detail
PDB ID:
7XLW
Keywords:
DNA
Title:
Crystal structure of a NIR-emitting DNA-stabilized Ag16 nanocluster (G7I/G9I mutant)
Biological Source:
Source Organism:
synthetic construct
PDB Version:
Deposition Date:
2022-04-23
Release Date:
2022-07-13
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.89 Å
R-Value Free:
0.18
R-Value Work:
0.15
R-Value Observed:
0.15
Space Group:
P 1
7XLW validation report
Macromolecular Entities
Polymer Type:polydeoxyribonucleotide
Description:DNA (5'-D(*CP*AP*CP*CP*TP*AP*IP*CP*IP*A)-3')
Chain IDs:A, B, C, D, E, F, G, H, I, J, K, L
Chain Length:10
Number of Molecules:12
Biological Source:synthetic construct
Ligand Molecules
AG
Primary Citation
The effect of inosine on the spectroscopic properties and crystal structure of a NIR-emitting DNA-stabilized silver nanocluster.
Nanoscale Adv 4 3212 3217 (2022)
PMID: 36132821 DOI: 10.1039/d2na00325b

Abstact

The effect of replacing guanosines with inosines in the two stabilizing strands (5'-CACCTAGCGA-3') of the NIR emissive DNA-Ag16NC was investigated. The spectroscopic behavior of the inosine mutants is position-dependent: when the guanosine in position 7 was exchanged, the nanosecond fluorescence decay time shortened, while having the inosine in position 9 made the decay time longer. Thanks to structural information gained from single crystal X-ray diffraction measurements, it was possible to propose a mechanistic origin for the observed changes.

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Primary Citation of related structures
7XLW