Journal
NATURE GENETICS
Volume 36, Issue 9, Pages 961-968Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ng1412
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Funding
- NIGMS NIH HHS [R01 GM068882] Funding Source: Medline
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A new class of dominant dark skin (Dsk) mutations discovered in a screen of similar to30,000 mice is caused by increased dermal melanin. We identified three of four such mutations as hypermorphic alleles of Gnaq and Gna11, which encode widely expressed Galphaq subunits, act in an additive and quantitative manner, and require Ednrb. Interactions between Gq and Kit receptor tyrosine kinase signaling can mediate coordinate or independent control of skin and hair color. Our results provide a mechanism that can explain several aspects of human pigmentary variation and show how polymorphism of essential proteins and signaling pathways can affect a single physiologic system.
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