8K1Y

Crystal structure of human serum albumin and ruthenium Val complex adduct

Summary for 8K1Y

• Entry DOI: 10.2210/pdb8k1y/pdb
• Descriptor: Albumin, NITRIC OXIDE, VALINE, ... (9 entities in total)
• Functional Keywords: human serum albumin, metal binding protein, structural genomics
• Biological source: Homo sapiens (human)
• Total number of polymer chains: 1
• Total formula weight: 68890.16

Authors

Gong, W.J.,Xie, L.L.,Wang, W.M.,Wang, H.F. (deposition date: 2023-07-11, release date: 2024-07-17, Last modification date: 2024-12-11)

Primary citation

Shi, J.,Xie, L.,Gong, W.,Bai, H.,Wang, W.,Wang, A.,Cao, W.,Tong, H.,Wang, H.
Insight into the anti-proliferation activity and photoinduced NO release of four nitrosylruthenium isomeric complexes and their HSA complex adducts.
Metallomics, 16:-, 2024

PubMed Abstract: Four Ru(II)-centered isomeric complexes [RuCl(5cqn)(Val)(NO)] (1-4) were synthesized with 5cqn (5-chloro-8-hydroxyquinoline) and chiral Val (Val = L- or D-valine) as co-ligand, and their structures were confirmed using the X-ray diffraction method. The cytotoxicity and photodynamic activity of the isomeric complexes and their human serum albumin (HSA) complex adducts were evaluated. Both the isomeric complexes and their HSA complex adducts significantly affected HeLa cell proliferation, with an IC50 value in the range of 0.3-0.5 μM. The photo-controlled release of nitric oxide (NO) in solution was confirmed using time-resolved Fourier transform infrared and electron paramagnetic resonance spectroscopy techniques. Furthermore, photoinduced NO release in living cells was observed using a selective fluorescent probe for NO. Moreover, the binding constants (Kb) of the complexes with HSA were calculated to be 0.17-1.98 × 104 M-1 and the average number of binding sites (n) was found to be close to 1, it can serve as a crucial carrier for delivering metal complexes. The crystal structure of the HSA complex adduct revealed that one [RuCl(H2O)(NO)(Val)]+ molecule binds to a pocket in domain I. This study provides insight into possible mechanism of metabolism and potential applications for nitrosylruthenium complexes.

PubMed: 38263542
DOI: 10.1093/mtomcs/mfae005

Experimental method

X-RAY DIFFRACTION (2.15 Å)