Skip to main content
Log in

Evolution of Biomineralization Genes in the Prismatic Layer of the Pen Shell Atrina pectinata

  • Original Article
  • Published:
Journal of Molecular Evolution Aims and scope Submit manuscript

Abstract

Molluscan shells are composed of calcium carbonates, with small amounts of extracellular matrices secreted from mantle epithelial cells. Many types of shell matrix proteins (SMPs) have been identified from molluscan shells or mantle cells. The pen shell Atrina pectinata (Pinnidae) has two different shell microstructures, the nacreous and prismatic layers. Nacreous and prismatic layer-specific matrix proteins have been reported in Pteriidae bivalves, but remain unclear in Pinnidae. We performed transcriptome analysis using the mantle cells of A. pectinata to screen the candidate transcripts involved in its prismatic layer formation. We found Asprich and nine highly conserved prismatic layer-specific SMPs encoding transcript in P. fucata, P. margaritifera, and P. maxima (Tyrosinase, Chitinase, EGF-like proteins, Fibronectin, valine-rich proteins, and prismatic uncharacterized shell protein 2 [PUSP2]) using molecular phylogenetic analysis or multiple alignment. We confirmed these genes were expressed in the epithelial cells of the mantle edge (outer surface of the outer fold) and the mantle pallium. Phylogenetic character mapping of these SMPs was used to infer a possible evolutionary scenario of them in Pteriomorphia. EGF-like proteins, Fibronectin, and valine-rich proteins encoding genes each evolved in the linage leading to four Pteriomorphia (Mytilidae, Pinnidae, Ostreidae, and Pteriidae), PUSP2 evolved in the linage leading to three Pteriomorphia families (Pinnidae, Ostreidae, and Pteriidae), and chitinase was independently evolved as SMPs in Mytilidae and in other Pteriomorphia (Pinnidae, Ostreidae, and Pteriidae). Our results provide a new dataset for A. pectinata SMP annotation, and a basis for understanding the evolution of prismatic layer formation in bivalves.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11

Similar content being viewed by others

Data Availability

Transcriptome data are available in the DNA Data Bank of Japan (DDBJ) (Sequence Read Archive: DRR209159, BioProject: PRJDB9333, BioSample: SAMD00206368, TSA: ICPQ01000001-ICPQ01061263). Other sequence data (ApeAsprich, ApeCR-CN1, ApeCR-CN2, ApeEGF-like 1, ApeEGF-like 2, ApeCR-FN, ApeMP10, ApeAlveolin, and ApePUSP2) are available in the DDBJ under accession numbers LC574994-LC575002.

References

Download references

Acknowledgements

We thank Dr Takeshi Takeuchi (Okinawa Institute of Science and Technology Graduate University) for help in annotation of shell matrix proteins and molecular phylogenetic analysis. We also thank Dr Yosuke Ono, Dr Aya Takesono, and Dr Testu Kudoh (University of Exeter) for advice with section in situ hybridization. We also thank Dr Masaei Kanematsu (National Research Institute of Fisheries and Environment of Inland Sea) for the gift of adult specimens of A. pectinata. We thank two professional editors who are both native speakers of English for editing English in this manuscript.

Funding

This research was partially funded by Grant-in-Aid for Scientific Research B (JP19H03045) and Grant-in-Aid for Scientific Research on Innovative Areas IBmS: JSPS KAKENHI Grant Number JP19H05771.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Michio Suzuki.

Ethics declarations

Conflict of interest

The authors declare that they have no conflict of interest.

Ethics Approval

All animal collection and experiments followed the Collecting and Experimental Ethics Policy of the University of Tokyo.

Additional information

Handling editor: John Bracht.

Electronic supplementary material

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Shimizu, K., Kintsu, H., Awaji, M. et al. Evolution of Biomineralization Genes in the Prismatic Layer of the Pen Shell Atrina pectinata. J Mol Evol 88, 742–758 (2020). https://doi.org/10.1007/s00239-020-09977-7

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00239-020-09977-7

Keywords

Navigation