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The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
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Related Experiment Video

Updated: Mar 20, 2026

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells

Published on: June 7, 2019

RASopathy Gene Mutations in Melanoma.

Ruth Halaban¹, Michael Krauthammer²

¹Department of Dermatology, Yale University School of Medicine, New Haven, Connecticut, USA.

The Journal of Investigative Dermatology

|May 29, 2016

Summary

Melanoma harbors mutations found in RASopathies, a group of genetic disorders. These mutations activate the RAS/mitogen-activated protein kinase pathway, contributing to melanoma development and potentially acting synergistically.

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Area of Science:

Oncology
Genetics
Molecular Biology

Background:

Next-generation sequencing (NGS) has identified high-frequency driver genes in melanoma.
Less common mutations in melanoma are linked to genetic disorders known as RASopathies.

Purpose of the Study:

To investigate the overlap between RASopathy-associated mutations and melanoma.
To explore the role of these shared mutations in melanoma development and pathway activation.

Main Methods:

Comparative analysis of large-scale melanoma sequencing data.
Review of existing literature on RASopathies and melanoma genetics.
Examination of amino acid substitutions in RAS/mitogen-activated protein kinase (MAPK) pathway genes.

Main Results:

Significant overlap identified between RASopathy mutations and those found in melanoma.
Evidence suggests these mutations activate the RAS/MAPK pathway in melanoma.
Co-occurrence of multiple RASopathy mutations in melanoma was observed, potentially enhancing pathway activation.

Conclusions:

Mutations typically associated with RASopathies play a role in melanoma pathogenesis.
The RAS/MAPK pathway is a key target in understanding melanoma driven by these mutations.
Synergistic effects of co-occurring RASopathy mutations may accelerate melanoma progression.