Backbone chemical shift and secondary structure assignments for mouse siderocalin

Area of Science:

• Structural biology
• Biochemistry
• Molecular biology

Background:

• The lipocalin protein family is characterized by structural conservation and diverse biological functions, including ligand binding and protein interactions.
• Siderocalin, a mammalian lipocalin, plays roles in inflammation, iron transport, infection defense, oxidative stress, cell migration, apoptosis, and cancer, though its precise mechanisms remain unclear.
• Previous NMR backbone assignments exist for human and rat siderocalin.

Purpose of the Study:

• To determine the backbone Nuclear Magnetic Resonance (NMR) assignments for mouse siderocalin, an important model organism.
• To provide data crucial for structure-based drug discovery targeting siderocalin.
• To predict secondary structure elements and compare them with known structures.

Main Methods:

• Nuclear Magnetic Resonance (NMR) spectroscopy was used to obtain backbone chemical shift assignments for mouse siderocalin.
• TALOS-N and CSI 3.0 software were employed to predict secondary structure elements based on the assigned chemical shifts.
• The predicted secondary structures were compared with existing crystal structure data and the conserved lipocalin fold.

Main Results:

• The study successfully reports the backbone NMR assignments for mouse siderocalin.
• Secondary structure prediction revealed a high proportion of beta strands and a significant alpha-helical region.
• The predicted secondary structure elements align well with the known crystal structure of siderocalin and the general lipocalin family fold.

Conclusions:

• The reported NMR assignments for mouse siderocalin provide valuable structural information for this key protein.
• The findings support the conserved structural architecture within the lipocalin protein family.
• This data serves as a foundation for future structure-based drug discovery efforts related to siderocalin's functions.