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Updated: Jun 12, 2025
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A Method for Extracting Pigments from Squid Doryteuthis pealeii
Published on: November 9, 2016
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Molecular basis of pigment structural diversity in echinoderms
Feng Li1, Zhenjian Lin1, Eric W Schmidt1
1Department of Medicinal Chemistry, University of Utah, Salt Lake City, UT 84112, USA.
Iscience
|September 23, 2024
Summary
Crinoid enzymes called polyketide synthases (PKSs) produce pigment precursors. These enzymes reveal how diverse animal colors evolved through unique biochemical pathways.
Area of Science:
- Biochemistry
- Zoology
- Evolutionary Biology
Background:
- Animal coloration is crucial for ecological and physiological functions.
- Echinoderms, including crinoids, possess polyketide synthases (PKSs) involved in pigment biosynthesis.
- Crinoids exhibit complex pigments in extant species and fossils.
Purpose of the Study:
- To characterize the pigment biosynthetic enzyme CrPKS from the crinoid *Anneissia japonica*.
- To understand the biochemical mechanisms underlying crinoid pigment production.
- To elucidate the evolutionary diversity of animal PKSs.
Main Methods:
- Biochemical characterization of the CrPKS enzyme.
- Analysis of pigment precursor synthesis.
- Comparative analysis of PKS enzyme selectivity.
Main Results:
- CrPKS synthesizes 14-carbon aromatic pigment precursors.
- The crinoid enzyme utilizes different biochemical principles compared to fungal PKSs.
- CrPKS exhibits relaxed starter unit selectivity, incorporating butyryl- or ethylmalonyl-CoA.
Conclusions:
- CrPKS produces a crinoid pigment precursor with a saturated side chain.
- Enzyme variations in echinoderm pigment biosynthesis contribute to the diversity of animal colors.
- Understanding animal PKS diversity sheds light on evolutionary pathways of coloration.
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