New genomic and fossil data illuminate the origin of enamel
@article{Qu2015NewGA, title={New genomic and fossil data illuminate the origin of enamel}, author={Qingming Qu and Tatjana Haitina and Min Zhu and Per Erik Ahlberg}, journal={Nature}, year={2015}, volume={526}, pages={108-111} }
Enamel, the hardest vertebrate tissue, covers the teeth of almost all sarcopterygians (lobe-finned bony fishes and tetrapods) as well as the scales and dermal bones of many fossil lobe-fins. Enamel deposition requires an organic matrix containing the unique enamel matrix proteins (EMPs) amelogenin (AMEL), enamelin (ENAM) and ameloblastin (AMBN). Chondrichthyans (cartilaginous fishes) lack both enamel and EMP genes. Many fossil and a few living non-teleost actinopterygians (ray-finned bony…
71 Citations
Immunolocalization of Enamel Matrix Protein-Like Proteins in the Tooth Enameloid of Actinopterygian Bony Fish
- Biology
- 2018
Transmission electron microscopy-based immunohistochemical examinations were performed in order to search for EMP-like proteins in the cap enameloid of basic actinopterygians, Polypterus and gar, detecting positive immunoreactivity just before the appearance of many crystallites along collagen fibrils, indicating that the cap Enameloid contains EMP- like proteins.
Coevolution of enamel, ganoin, enameloid, and their matrix SCPP genes in osteichthyans
- BiologyiScience
- 2021
Skeletal Mineralization in Association with Type X Collagen Expression Is an Ancestral Feature for Jawed Vertebrates
- BiologyMolecular biology and evolution
- 2019
These findings push the origin of Col10a1 gene prior to the divergence of osteichthyans and chondrichthyans, and demonstrate its ancestral association with mineralization of both the odontode skeleton and the endoskeleton.
Parallel Evolution of Ameloblastic scpp Genes in Bony and Cartilaginous Vertebrates
- BiologyMolecular biology and evolution
- 2022
A single origin for the hypermineralized outer odontode layer as produced by an ancestral developmental process performed by Sparc-L is supported, implying the homology of the enamel and enameloid tissues in all vertebrates.
Ganoin and acrodin formation on scales and teeth in spotted gar: A vital role of enamelin in the unique process of enamel mineralization.
- BiologyJournal of experimental zoology. Part B, Molecular and developmental evolution
- 2022
Investigation of the formation and mineralization of the ganoin and acrodin matrices in spotted gar and the evolution of the scpp5, ameloblastin (ambn), and enamelin (enam) genes suggest that, in bichirs and gars, all these genes retain structural characteristics of their orthologs in stem actinopterygians, presumably reflecting the presence of gano in on scales and teeth.
SCPP Genes and Their Relatives in Gar: Rapid Expansion of Mineralization Genes in Osteichthyans.
- BiologyJournal of experimental zoology. Part B, Molecular and developmental evolution
- 2017
It appears that many SCPP genes expanded rapidly in stem osteichthyans and in basal actinopterygians, including many newly identified P/Q-rich genes expressed in teeth and/or scales.
Tooth development in the Early Devonian sarcopterygian Powichthys and the evolution of the crown osteichthyan dentition
- Geography, Environmental SciencePalaeontology
- 2021
In osteichthyans (bony fishes) the dentition is characterized by marginal tooth rows replaced by basal resorption. Basal resorption was present in the stem osteichthyan Andreolepis, which also…
A Silurian maxillate placoderm illuminates jaw evolution
- Geography, Environmental ScienceScience
- 2016
A second Silurian maxillate placoderm is described that more securely bridges the jawless toothlike plates of placoderms to the development of the jawed condition that ultimately led to the three-boned jaw in ancestors of modern vertebrates.
The developmental relationship between teeth and dermal odontodes in the most primitive bony fish Lophosteus
- BiologyeLife
- 2020
The ontogenetic trajectory of a marginal jawbone of Lophosteus superbus, the phylogenetically most basal stem osteichthyan, visualized by synchrotron microtomography, reveals a developmental relationship between teeth and dermal odontodes that is not evident from the adult morphology.
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