The amelogenin story: origin and evolution

Sire, Jean‐Yves; Delgado, Sidney; Girondot, Marc

doi:10.1111/j.1600-0722.2006.00297.x

Cited by 29 publications

(42 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the generally accepted molecular clock hypothesis, we previously estimated that SPARCL1 arose from SPARC not so long before the divergence of rayfinned fish and lobe-finned fish [Kawasaki et al, 2004]. In contrast, a different study estimated the divergence date between SPARC and SPARCL1 to be in the Precambrian [Delgado et al, 2001;Sire et al, 2006], which is significantly earlier than our estimate. However, neither of these two studies used SPARC genes of cartilaginous fish or jawless vertebrates.…”

Section: The Origin Of Sparcl1contrasting

confidence: 55%

“…The substitution rates are extremely high in these salivary and casein genes [Sabatini et al, 1993]. In contrast, dentin/bone and enamel SCPP genes evolve more slowly; significant sequence homology is detectable among the orthologous dentin/bone and enamel genes of mammals, birds, and amphibians [Toyosawa et al, 1998;Shintani et al, 2003;Kawasaki and Weiss, 2006;Sire et al, 2006].…”

Section: Scpp Genes Of Placentals Marsupials and Monotremesmentioning

confidence: 99%

See 1 more Smart Citation

Gene Duplication and the Evolution of Vertebrate Skeletal Mineralization

Kawasaki

Buchanan

Weiss

2007

Cells Tissues Organs

View full text Add to dashboard Cite

The mineralized skeleton is a critical innovation that evolved early in vertebrate history. The tissues found in dermal skeletons of ancient vertebrates are similar to the dental tissues of modern vertebrates; both consist of a highly mineralized surface hard tissue, enamel or enameloid, more resilient body dentin, and basal bone. Many proteins regulating mineralization of these tissues are evolutionarily related and form the secretory calcium-binding phosphoprotein (SCPP) family. We hypothesize here the duplication histories of SCPP genes and their common ancestors, SPARC and SPARCL1. At around the same time that Paleozoic jawless vertebrates first evolved mineralized skeleton, SPARCL1 arose from SPARC by whole genome duplication. Then both before and after the split of ray-finned fish and lobe-finned fish, tandem gene duplication created two types of SCPP genes, each residing on the opposite side of SPARCL1. One type was subsequently used in surface tissue and the other in body tissue. In tetrapods, these two types of SCPP genes were separated by intrachromosomal rearrangement. While new SCPP genes arose by duplication, some old genes were eliminated from the genome. As a consequence, phenogenetic drift occurred: while mineralized skeleton is maintained by natural selection, the underlying genetic basis has changed.

show abstract

Section: The Origin Of Sparcl1contrasting

confidence: 55%

Section: Scpp Genes Of Placentals Marsupials and Monotremesmentioning

confidence: 99%

Gene Duplication and the Evolution of Vertebrate Skeletal Mineralization

Kawasaki

Buchanan

Weiss

2007

Cells Tissues Organs

View full text Add to dashboard Cite

show abstract

“…3 ) and from sequence analysis ( fig. 1 , 2 and Sire et al [2006]). Indeed, the roughly conserved features of the N-terminal region suggest not only a common origin but also some functional similarities (they are all ameloblast-expressed proteins).…”

Section: Relationships Of Ameloblast-expressed Scpp Genesmentioning

confidence: 99%

“…quences, sequences retrieved in the databases, and new sequences; see Sire et al [2006] for the species list). The sequences were aligned as described above for AMTN and ODAM, and a putative AMEL ancestral sequence was calculated using PAUP 4.0.…”

Section: The Evolutionary Origin Of Amelmentioning

confidence: 99%

The Origin and Evolution of Enamel Mineralization Genes

Sire

Davit-Béal

Delgado

et al. 2007

Cells Tissues Organs

Self Cite

View full text Add to dashboard Cite

Background/Aims: Enamel and enameloid were identified in early jawless vertebrates, about 500 million years ago (MYA). This suggests that enamel matrix proteins (EMPs) have at least the same age. We review the current data on the origin, evolution and relationships of enamel mineralization genes. Methods and Results: Three EMPs are secreted by ameloblasts during enamel formation: amelogenin (AMEL), ameloblastin (AMBN) and enamelin (ENAM). Recently, two new genes, amelotin (AMTN) and odontogenic ameloblast associated (ODAM), were found to be expressed by ameloblasts during maturation, increasing the group of ameloblast-secreted proteins to five members. The evolutionary analysis of these five genes indicates that they are related: AMEL is derived from AMBN, AMTN and ODAM are sister genes, and all are derived from ENAM. Using molecular dating, we showed that AMBN/AMEL duplication occurred >600 MYA. The large sequence dataset available for mammals and reptiles was used to study AMEL evolution. In the N- and C-terminal regions, numerous residues were unchanged during >200 million years, suggesting that they are important for the proper function of the protein. Conclusion: The evolutionary analysis of AMEL led to propose a dataset that will be useful to validate AMEL mutations leading to X- linked AI.

show abstract

“…However, the expression of mouse Am was evident in epithelium-derived tissues of 1-week recombinant explants. It was reported that homologs of the mammalian enamelin and amelogenin genes have not been detected in the chick genome, but that they have been detected in reptiles and amphibians (Toyosawa et al, '98;Kawasaki et al, 2004;Sire et al, 2006). Moreover, the expression of mouse CK14, a mouse-specific epithelial marker, was also detected in those epithelium-derived tissues.…”

Section: Heterospecific Recombinant Teeth Show a Single Cusp Patternmentioning

confidence: 90%

Chick tooth induction revisited

et al. 2009

View full text Add to dashboard Cite

Teeth have been missing from Aves for almost 100 million years. However, it is believed that the avian oral epithelium retains the molecular signaling required to induce odontogenesis, and this has been widely examined using heterospecific recombinations with mouse dental mesenchyme. It has also been argued that teeth can form from the avian oral epithelium owing to contamination of the mouse mesenchyme with mouse dental epithelial cells. To investigate the possibility of tooth formation from chick oral epithelium and the characteristics of possible chick enamel, we applied LacZ transgenic mice during heterospecific recombination and examined the further tooth formation. Transmission electron microscopy was used to identify the two tissues during development after heterospecific recombination. No mixing was detected between chick oral epithelium and mouse dental mesenchyme after 2 days, and secretory ameloblasts with Tomes' processes were observed after 1 week. Teeth were formed after 3 weeks with a single cusp pattern, possibly determined by epithelial factors, which is similar to that of the avian tooth in the late Jurassic period. These recombinant teeth were smaller than mouse molars, whereas perfect structures of both ameloblasts and enamel showed histological characteristics similar to those of mice. Together these observations consistent with previous report that odontogenesis is initially directed by species-specific mesenchymal signals interplaying with common epithelial signals.

show abstract

The amelogenin story: origin and evolution

Cited by 29 publications

References 34 publications

Gene Duplication and the Evolution of Vertebrate Skeletal Mineralization

Gene Duplication and the Evolution of Vertebrate Skeletal Mineralization

The Origin and Evolution of Enamel Mineralization Genes

Chick tooth induction revisited

Contact Info

Product

Resources

About