2014
DOI: 10.1093/molbev/msu395
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Integrative View of α2,3-Sialyltransferases (ST3Gal) Molecular and Functional Evolution in Deuterostomes: Significance of Lineage-Specific Losses

Abstract: Sialyltransferases are responsible for the synthesis of a diverse range of sialoglycoconjugates predicted to be pivotal to deuterostomes’ evolution. In this work, we reconstructed the evolutionary history of the metazoan α2,3-sialyltransferases family (ST3Gal), a subset of sialyltransferases encompassing six subfamilies (ST3Gal I–ST3Gal VI) functionally characterized in mammals. Exploration of genomic and expressed sequence tag databases and search of conserved sialylmotifs led to the identification of a large… Show more

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Cited by 38 publications
(54 citation statements)
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References 102 publications
(176 reference statements)
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“…As far as the st3gal genes are concerned, a first series of tandem duplication of an ancestral st3gal gene in proto-Metazoa stem led to the GR1 and GR2/GR3/GRx groups of α2,3-sialyltransferases before the Porifera emergence. As previously reported for α2,8-sialyltransferases [30], a second series of tandem duplication took place after the Porifera radiation that gave rise to the full diversity of α2,3-sialyltransferase groups, as confirmed using ancestral genome reconstruction data from Putnam et al [53,64]. This further indicates that the functional diversity of st3gal groups was acquired well before vertebrate divergence.…”
Section: When β-Galactoside α23/6-sialyltransferase Evolutionary supporting
confidence: 79%
“…As far as the st3gal genes are concerned, a first series of tandem duplication of an ancestral st3gal gene in proto-Metazoa stem led to the GR1 and GR2/GR3/GRx groups of α2,3-sialyltransferases before the Porifera emergence. As previously reported for α2,8-sialyltransferases [30], a second series of tandem duplication took place after the Porifera radiation that gave rise to the full diversity of α2,3-sialyltransferase groups, as confirmed using ancestral genome reconstruction data from Putnam et al [53,64]. This further indicates that the functional diversity of st3gal groups was acquired well before vertebrate divergence.…”
Section: When β-Galactoside α23/6-sialyltransferase Evolutionary supporting
confidence: 79%
“…For instance, multiple sialyltransferases are encoded by the genome of a cephalochordate (Branchiostoma belcheri); both N-acetylneuraminic acid (Neu5Ac) or N-glycolylneuraminic acid (Neu5Gc) were found to be expressed in a tissue-specific manner in this organism, while methylated 3-deoxy-Dglycero-D-galacto-2-nonulosonic acid (KDN; a non-acylated sialic acid) was found on ovary O-glycans [55]. In echinoderms, a number of α2,3-, α2,6and α2,8-sialyltransferase homologues, yet to be enzymatically characterised, occur in the sea urchin Strongylocentrotus purpuratus [56][57][58]; NeuAc and NeuGc are found in a number of echinoderm species, also in O-acetylated and O-sulphated forms. In starfish and sea cucumbers, a large percentage of these sialic acids are additionally methylated at O-8, whereas in other echinoderms this position can be sulphated [59,60].…”
Section: Sialic Acidsmentioning
confidence: 97%
“…Synthesis of polySia is catalyzed by two polysialyltransferases (polySTs), designated ST8Sia II (STX) and ST8Sia IV (PST). The finding that polyST gene "knock-down" experiments negates events associated with tumor cell dissemination indicates that polySTs are validated targets for potential drug therapies [8][9][10][11][12][13]. It is also known that cytidine monophosphate (CMP)-sialic acid (CMP-Sia), the activated nucleotide sugar of N-acetylneuraminic acid (Neu5Ac; Sia) [14][15][16][17][18][19], is required by the polySTs for biosynthesis of polySia [9,13,20,21].…”
Section: Introductionmentioning
confidence: 99%