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In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
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Pterin-based pigmentation in animals.

Pedro Andrade1, Miguel Carneiro1

  • 1CIBIO-InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto, Vairão, Portugal.

Biology Letters
|August 17, 2021
PubMed
Summary
This summary is machine-generated.

Pterins are key endogenous pigments for bright animal coloration, bridging gaps between melanins and carotenoids. Further research is needed to understand their molecular basis and evolutionary significance.

Keywords:
animal colorationaposematismornamentationpleiotropysexual selectionvisual signalling

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Area of Science:

  • Animal coloration biology
  • Biochemistry of pigments
  • Evolutionary developmental biology

Background:

  • Pterins are endogenous pigments responsible for vibrant colors in animals.
  • Despite their prevalence, pterin pigmentation is less studied than melanins or carotenoids.
  • Pterins play roles in physiology and signaling, in addition to coloration.

Purpose of the Study:

  • To summarize current knowledge on pterin pigmentation in animals.
  • To highlight pterins' unique position between melanins and carotenoids for studying coloration evolution.
  • To identify knowledge gaps and suggest future research directions.

Main Methods:

  • Literature review and synthesis of existing research.
  • Analysis of genomic studies on pterin pigmentation evolution.
  • Comparative analysis with melanin and carotenoid pigmentation.

Main Results:

  • Pterins are endogenously produced, bright pigments with intermediate characteristics.
  • They offer unique opportunities to study pigment evolution and honest signaling.
  • Significant gaps remain in understanding the molecular basis of pterin production and deposition.

Conclusions:

  • Pterin pigmentation is a rich area for research, bridging endogenous and dietary pigment studies.
  • Future research should focus on functional studies in diverse model systems.
  • Technological advances facilitate new investigations into pterin-based coloration.