Target intelligence / Profile preview

ADP-ribosylation factor-like protein 15 (ARL15)

Target
ARL15
Molecular classification
Small GTPase, ARF-like protein (ARF family small GTPase), Signaling protein, Other (not a receptor, ion channel, or enzyme by current evidence)
01

Overview

ADP-ribosylation factor-like protein 15 (ARL15) is a member of the ARF family of small GTPases, structurally related to ADP-ribosylation factors but with divergent functions. ARL15 is ubiquitously expressed in human tissues and localizes predominantly to the Golgi apparatus, with additional presence at the plasma membrane and in vesicular compartments. Its key roles include regulation of adipocyte differentiation and adiponectin secretion, mediating intracellular trafficking processes, and acting as a positive regulator of TGFβ family signaling via direct interaction with Smad4, thereby influencing Smad-complex assembly and signaling. Genetic studies have associated ARL15 variants with metabolic syndromes, including insulin resistance, obesity, type 2 diabetes, dyslipidemia, and lipodystrophy, as well as rheumatoid arthritis. Although no approved therapeutic drugs directly target ARL15, its fundamental participation in these pathways make it of significant interest as a potential therapeutic target for metabolic and inflammatory diseases[1][2][3][5].

Other names
ARL15ARFRP2ADP-ribosylation factor-related protein 2FLJ20051
02

Biological functions

Intracellular traffickingRegulation of adipogenesis (adipocyte differentiation)Regulation of adiponectin secretionPositive regulation of TGFβ family signaling (interaction with Smad4)Protein-protein interactions (with Smad4, ARL6IP5)
03

Disease associations

Metabolic disease (including insulin resistance, obesity, type 2 diabetes)LipodystrophyRheumatoid arthritisDyslipidemiaPotentially other metabolic syndromes
04

Safety considerations

Loss-of-function may predispose to severe insulin resistance, lipodystrophy, and metabolic dysfunctionPotential impact on adipose tissue development and function
05

Biomarkers

Genetic variants/haploinsufficiency associated with lipodystrophyGenetic association with metabolic syndrome traits (HDL, fasting insulin)Association with rheumatoid arthritis susceptibility

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