Target intelligence / Profile preview

Farnesyltransferase, CAAX box, alpha (FNTA)

Target
FNTA
Molecular classification
Enzyme, Prenyltransferase, Protein modifying enzyme
01

Overview

Farnesyltransferase, CAAX box, alpha (FNTA) encodes the alpha subunit shared by protein farnesyltransferase and protein geranylgeranyltransferase type-1, which is essential for the prenylation of proteins containing a C-terminal CAAX motif. Preylation by these enzymes ensures the proper localization and function of various signaling proteins, including Ras and Rac1, and is implicated in cancer, metabolic, and neurodegenerative diseases. While FNTA is a validated therapeutic target, its related pseudogenes (including FNTAP1) are not known to encode active proteins nor are they clinically targeted[1][3].

Other names
Protein Farnesyltransferase/Geranylgeranyltransferase Type-1 Subunit AlphaPGGT1APTAR2FPTARas Proteins Prenyltransferase Subunit AlphaProtein Prenyltransferase Alpha Subunit Repeat Containing 2Farnesyltransferase, CAAX box, alpha
02

Mechanism of action

Inhibition of protein prenylation (blocks attachment of farnesyl/geranylgeranyl to target proteins, e.g., Ras)

03

Biological functions

Protein prenylation (catalyzes transfer of farnesyl/geranylgeranyl group to CAAX-motif proteins)Membrane localization of target proteinsSignal transduction (downstream Ras, Rac1)Modulation of neuromuscular junction development (via RAC1 prenylation)Metabolic regulation (influences apolipoprotein A-I secretion)
04

Disease associations

Cancer (breast, bladder)Neurodegenerative diseases (Huntington’s disease)Cardiovascular disease (via metabolic effects)Diabetes (diabetic retinopathy)Endocrine tumors, dystonia
05

Safety considerations

Potential toxicity from interfering with essential signaling pathways (Ras, Rac1)Off-target effects (prenylation is necessary for many cellular functions; global inhibition may have broad impact)
06

Interacting drugs

Farnesyltransferase inhibitors such as tipifarnib, lonafarnib, and other experimental anticancer agents
07

Biomarkers

FNTA expression (as a marker for cancer progression/aggressiveness and chemoresistance)Prenylated Ras/Rac1 as indicators of pathway activation

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