Target intelligence / Profile preview

Melanoma-associated antigen B18 (MAGEB18)

Target
MAGEB18
Molecular classification
Other (Cancer-testis antigen), Ubiquitin ligase cofactor/regulatory protein
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Overview

Melanoma-associated antigen B18 (MAGEB18) is a cancer-testis antigen and member of the type I MAGE protein family, encoded on the X chromosome and primarily expressed in testis under normal conditions, but aberrantly upregulated in various tumors including melanoma. MAGEB18 is proposed to play a regulatory role in ubiquitination by binding to RING-type E3 ubiquitin ligases (such as LNX1), potentially modulating their substrate specificity or ligase activity and thus impacting protein stability, signaling pathways, and tumorigenesis. As with other members of the MAGE family, altered expression of MAGEB18 may be associated with poor clinical prognosis in cancers and is being studied as a potential immunotherapy target and biomarker.

Other names
MAGE family member B18MAGEB18MGC33889MAGE-B18 antigenmelanoma-associated antigen B18melanoma antigen family B, 18melanoma antigen family B18
02

Mechanism of action

Proposed modulation/enhancement of E3 ubiquitin ligase activity, particularly RING-type zinc finger-containing E3 ligases

03

Biological functions

Regulation of protein ubiquitinationProtein-protein interaction with E3 RING ubiquitin-protein ligasesPotential role in cell proliferationRole in cancer progression
04

Disease associations

Cancer (notably implicated in melanoma and potentially other tumors)
05

Safety considerations

Tumor-specific expression may limit off-target effects, but therapeutic targeting could impact normal testicular or placental tissue
06

Biomarkers

Overexpression/aberrant expression may serve as a cancer biomarker, including for melanoma

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