ArticleDevelopment genes and evolution2022
Differential MC5R loss in whales and manatees reveals convergent evolution to the marine environment.
Article in Development genes and evolution, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 4 papers.
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4 citing papers in PubMed, 9 citations in OpenAlex.
- Cetacean loss of the master adipose tissue regulator βNature communications · 2025Article
- Sirenian genomes illuminate the evolution of fully aquatic species within the mammalian superorder afrotheria.Nature communications · 2024Article
- Decay of Skin-Specific Gene Modules in Pangolins.Journal of molecular evolution · 2023Article
- Melanocortin-5 Receptor: Pharmacology and Its Regulation of Energy Metabolism.International journal of molecular sciences · 2022Review
Corrections and comments
- Erratum issued
Authors and funding
12 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Melanocortin 5 receptor (MC5R), which is expressed in the terminally differentiated sebaceous gland, is a G protein-coupled receptor (GPCR). MC5R exists mostly in mammals but is completely lost in whales; only the relic of MC5R can be detected in manatees, and phenotypically, they have lost sebaceous glands. Interestingly, whales and manatees are both aquatic mammals but have no immediate common ancestors. The loss of MC5R and sebaceous glands in whales and manatees is likely to be a result of convergent evolution. Here, we find that MC5R in whales and manatees are lost by two different mechanisms. Homologous recombination of MC5R in manatees and the insertion of reverse transcriptase in whales lead to the gene loss, respectively. On one hand, in manatees, there are two "TTATC" sequences flanking MC5R, and homologous recombination of the segments between the two "TTATC" sequences resulted in the partial loss of the sequence of MC5R. On the other hand, in whales, reverse transcriptase inserts between MC2R and RNMT on the chromosome led to the loss of MC5R. Based on these two different mechanisms for gene loss in whales and manatees, we finally concluded that MC5R loss might be the result of convergent evolution to the marine environment, and we explored the impact on biological function that is significant to environmental adaptation.
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