DING Proteins Extend to the Extremophilic World

Area of Science:

• Biochemistry
• Molecular Biology
• Protein Science

Background:

• DING proteins are a large, conserved protein family found in all domains of life.
• They possess a characteristic DINGGG N-terminus and a conserved phosphate-binding site, structurally similar to PstS proteins.
• Despite high sequence conservation, DING genes are not identified for all characterized DING proteins.

Purpose of the Study:

• To provide an updated review of recent findings on DING proteins.
• To highlight the diversity in biological activities and ligand-binding properties of DING proteins.
• To discuss the involvement of DING proteins in various pathologies.

Main Methods:

• Literature review of existing studies on DING proteins.
• Immunological and N-terminal sequence analysis for protein identity confirmation.
• Biochemical characterization of purified DING proteins.

Main Results:

• DING proteins are ubiquitous, with over sixty members identified across mesophilic, thermophilic, and hyperthermophilic organisms.
• High sequence conservation is observed even between distantly related species.
• DING proteins exhibit heterogeneous biological activities and bind to phosphate and other ligands, with some implicated in pathologies.

Conclusions:

• DING proteins represent a highly conserved and functionally diverse protein family with potential roles in disease.
• Further research is needed to fully elucidate the functions and mechanisms of various DING proteins.
• This review consolidates current knowledge, paving the way for future investigations into DING protein biology.