<i>Hox</i>Genes of the Direct-type Developing Sea Urchin Peronella japonica

Hano, Yuko; Hayashi, Akitatsu; Yamaguchi, Shoutaro; Yamaguchi, Masatoshi

doi:10.2108/zsj.18.353

Cited by 16 publications

(4 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is important to note that the aforementioned translocation and inversion places a member of the Evx class of gene close to the anterior Hox1 gene instead of in proximity to a posterior gene. In the irregular echinoid, Peronella japonica (Clypeasteroida), the same set of 11 genes was identified, with Evx expected at the 5' end of the cluster [64]. It is possible that at least one Mox gene also exists in echinoids as a Mox1 -like homeobox protein has been detected in S. purpuratus [63].…”

Section: Resultsmentioning

confidence: 99%

How Hox genes can shed light on the place of echinoderms among the deuterostomes

David

Mooi

2014

EvoDevo

View full text Add to dashboard Cite

BackgroundThe Hox gene cluster ranks among the greatest of biological discoveries of the past 30 years. Morphogenetic patterning genes are remarkable for the systems they regulate during major ontogenetic events, and for their expressions of molecular, temporal, and spatial colinearity. Recent descriptions of exceptions to these colinearities are suggesting deep phylogenetic signal that can be used to explore origins of entire deuterostome phyla. Among the most enigmatic of these deuterostomes in terms of unique body patterning are the echinoderms. However, there remains no overall synthesis of the correlation between this signal and the variations observable in the presence/absence and expression patterns of Hox genes.ResultsRecent data from Hox cluster analyses shed light on how the bizarre shift from bilateral larvae to radial adults during echinoderm ontogeny can be accomplished by equally radical modifications within the Hox cluster. In order to explore this more fully, a compilation of observations on the genetic patterns among deuterostomes is integrated with the body patterning trajectories seen across the deuterostome clade.ConclusionsSynthesis of available data helps to explain morphogenesis along the anterior/posterior axis of echinoderms, delineating the origins and fate of that axis during ontogeny. From this, it is easy to distinguish between ‘seriality’ along echinoderm rays and true A/P axis phenomena such as colinearity within the somatocoels, and the ontogenetic outcomes of the unique translocation and inversion of the anterior Hox class found within the Echinodermata. An up-to-date summary and integration of the disparate lines of research so far produced on the relationship between Hox genes and pattern formation for all deuterostomes allows for development of a phylogeny and scenario for the evolution of deuterostomes in general, and the Echinodermata in particular.

show abstract

Section: Resultsmentioning

confidence: 99%

How Hox genes can shed light on the place of echinoderms among the deuterostomes

David

Mooi

2014

EvoDevo

View full text Add to dashboard Cite

show abstract

“…The role that Hox genes play in specifying the pentaradial symmetry in echinoderms, however, remains a mystery. Developmental research has been addressing the transition from a bilateral larva to a pentaradial adult, but most studies (Hano et al ., 2001; Cameron et al ., 2006; Morris & Byrne, 2014; Tsuchimoto & Yamaguchi, 2014; Koop et al ., 2017; Li et al ., 2020) have focused on echinoids and for a long time, our inferences were based on their highly derived, apparently idiosyncratic Hox cluster organization. Research on other classes (Méndez et al ., 2000; Mito & Endo, 2000; Li, Stoeckert & Roos, 2003; Li et al ., 2020; Hara et al ., 2006; Baughman et al ., 2014; Kikuchi et al ., 2015) have shown that the ancestral Hox cluster in echinoderms is rather conserved and similar to that of hemichordates (Li et al ., 2020), which means that the modifications seen in echinoids (i.e.…”

Section: Phylum Echinodermatamentioning

confidence: 99%

Worms and gills, plates and spines: the evolutionary origins and incredible disparity of deuterostomes revealed by fossils, genes, and development

et al. 2022

View full text Add to dashboard Cite

Deuterostomes are the major division of animal life which includes sea stars, acorn worms, and humans, among a wide variety of ecologically and morphologically disparate taxa. However, their early evolution is poorly understood, due in part to their disparity, which makes identifying commonalities difficult, as well as their relatively poor early fossil record. Here, we review the available morphological, palaeontological, developmental, and molecular data to establish a framework for exploring the origins of this important and enigmatic group. Recent fossil discoveries strongly support a vermiform ancestor to the group Hemichordata, and a fusiform active swimmer as ancestor to Chordata. The diverse and anatomically bewildering variety of forms among the early echinoderms show evidence of both bilateral and radial symmetry. We consider four characteristics most critical for understanding the form and function of the last common ancestor to Deuterostomia: Hox gene expression patterns, larval morphology, the capacity for biomineralization, and the morphology of the pharyngeal region. We posit a deuterostome last common ancestor with a similar antero‐posterior gene regulatory system to that found in modern acorn worms and cephalochordates, a simple planktonic larval form, which was later elaborated in the ambulacrarian lineage, the ability to secrete calcium minerals in a limited fashion, and a pharyngeal respiratory region composed of simple pores. This animal was likely to be motile in adult form, as opposed to the sessile origins that have been historically suggested. Recent debates regarding deuterostome monophyly as well as the wide array of deuterostome‐affiliated problematica further suggest the possibility that those features were not only present in the last common ancestor of Deuterostomia, but potentially in the ur‐bilaterian. The morphology and development of the early deuterostomes, therefore, underpin some of the most significant questions in the study of metazoan evolution.

show abstract

“…Hox gene cloning from echinoderms has been reported many times, although with a variation in gene components and numbers among taxa: the sea urchin species S. purpuratus [ 64 - 68 ], Tripneustes gratilla [ 69 - 71 ], P. lividus [ 72 ], Hemicentrotus pulcherrimus [ 73 ], Holopneustes purpurescens [ 74 ], L. variegatus [ 65 ], Heliocidaris erythrogramma [ 75 , 76 ], Heliocidaris tuberculata [ 76 ], Peronella japonica [ 77 ], Parechinus angulosus [ 78 ]; starfish species Patiriella exigua [ 79 , 80 ], Asterias rubens [ 79 ], and Asterina minor [ 81 ]; the sea cucumber Holothuria glaberrima [ 82 ]; the crinoids (feather star and sea lily) O. japonicus ([ 83 ], Tsurugaya, unpublished) and Metacrinus rotundus [ 84 ]; the brittle star Stegophiura sladeni [ 83 ]. In most of the cases, the sequences are partial, or only the homeobox of the genes are cloned, and the genomic organizations are not characterized.…”

Section: Hox/parahox Genes and The Hox Clustermentioning

confidence: 99%

Current Status of Echinoderm Genome Analysis - What do we Know?

Kondo

Akasaka

2012

View full text Add to dashboard Cite

Echinoderms have long served as model organisms for a variety of biological research, especially in the field of developmental biology. Although the genome of the purple sea urchin Strongylocentrotus purpuratus has been sequenced, it is the only echinoderm whose whole genome sequence has been reported. Nevertheless, data is rapidly accumulating on the chromosomes and genomic sequences of all five classes of echinoderms, including the mitochondrial genomes and Hox genes. This blossoming new data will be essential for estimating the phylogenetic relationships among echinoderms, and also to examine the underlying mechanisms by which the diverse morphologies of echinoderms have arisen.

show abstract

HoxGenes of the Direct-type Developing Sea Urchin Peronella japonica

Cited by 16 publications

References 27 publications

How Hox genes can shed light on the place of echinoderms among the deuterostomes

How Hox genes can shed light on the place of echinoderms among the deuterostomes

Worms and gills, plates and spines: the evolutionary origins and incredible disparity of deuterostomes revealed by fossils, genes, and development

Current Status of Echinoderm Genome Analysis - What do we Know?

Contact Info

Product

Resources

About