Structure of Four Acidic Oligosaccharides from the Jelly Coat Surrounding the Eggs of Xenopus Laevis

2008 ◽  
Vol 231 (2) ◽  
pp. 434-439
Author(s):  
Yves Plancke ◽  
Jean-Michel Wieruszeski ◽  
Catherine Alonso ◽  
Benoni Boilly ◽  
Gérard Strecker
Keyword(s):  
Xenopus Laevis ◽  
Jelly Coat

2,4-D Butoxyethyl Ester Kinetics in Embryos of Xenopus laevis: The Role of the Embryonic Jelly Coat in Reducing Chemical Absorption

2006 ◽  
Vol 52 (1) ◽  
pp. 113-120 ◽  
Author(s):  
Andrea N. Edginton ◽  
Claude Rouleau ◽  
Gerald R. Stephenson ◽  
Herman J. Boermans
Keyword(s):  
Xenopus Laevis ◽  
Chemical Absorption ◽  
Jelly Coat

scholarly journals O-glycan variability of egg-jelly mucins from Xenopus laevis: characterization of four phenotypes that differ by the terminal glycosylation of their mucins

2000 ◽  
Vol 352 (2) ◽  
pp. 449-463 ◽  
Author(s):  
Yann GUERARDEL ◽  
Ossarath KOL ◽  
Emmanuel MAES ◽  
Tony LEFEBVRE ◽  
Bénoni BOILLY ◽  
...  
Keyword(s):  
Xenopus Laevis ◽  
Molecular Mass ◽  
Electrophoretic Analysis ◽  
High Molecular Mass ◽  
Methylation Analysis ◽  
Glycosylation Pattern ◽  
Jelly Coat ◽  
New Family ◽  
Egg Jelly

Eggs from Xenopus laevis are surrounded by several layers of jelly that are needed for proper fertilization. Jelly coat is composed of high-molecular-mass glycoconjugates to which are bound many globular proteins. O-glycans released from the jelly coat of X. laevis have been partially described in previous studies. In this study, we compared the glycosylation pattern of the egg jelly coat isolated from six specimens of X. laevis. The O-glycans were released from jelly coats by alkali/borohydride treatment. Structural characterization was performed through a combination of one- and two-dimensional 1H-NMR and methylation analysis. This allowed the description of a new family of sulphated O-glycans present in jelly coats of all X. laevis. However, the jelly O-glycans showed a low extent of polymorphism between specimens. This intra-specific variability was restricted to the terminal substitution of O-linked oligosaccharides. The differential expression of two glycosyltransferase [an α-(1 → 4) galactosyltransferase and an α-(1 → 3) fucosyltransferase] activities resulted in the characterization of four phenotypes of X. laevis. Furthermore, electrophoretic analysis suggested that the high-molecular-mass fraction of jelly coat was mostly composed of mucin-type glycoproteins. Blot analysis with lectins confirmed that the glycan variability was borne by these mucin-type components. However, fertilization assays suggested that the glycan polymorphism had no repercussion on egg fertilizability.

Macromolecular composition of Xenopus laevis egg jelly coat

Biochemistry ◽  
1975 ◽  
Vol 14 (14) ◽  
pp. 3101-3107 ◽  
Author(s):  
Edward C. Yurewicz ◽  
Gene Oliphant ◽  
Jerry L. Hedrick
Keyword(s):  
Xenopus Laevis ◽  
Jelly Coat ◽  
Egg Jelly ◽  
Macromolecular Composition

scholarly journals The Incorporation and Fate of [35S]-Sulfate in the Jelly Coat of Xenopus laevis Eggs

1974 ◽  
Vol 11 (5) ◽  
pp. 534-542 ◽  
Author(s):  
Jerry L. Hedrick ◽  
Alan J. Smith ◽  
Edward C. Yurewicz ◽  
Gene Oliphant ◽  
Don P. Wolf
Keyword(s):  
Xenopus Laevis ◽  
Jelly Coat

Structure of Four Acidic Oligosaccharides from the Jelly Coat Surrounding the Eggs of Xenopus Laevis

1995 ◽  
Vol 231 (2) ◽  
pp. 434-439 ◽  
Author(s):  
Yves Plancke ◽  
Jean-Michel Wieruszeski ◽  
Catherine Alonso ◽  
Benoni Boilly ◽  
Gerard Strecker
Keyword(s):  
Xenopus Laevis ◽  
Jelly Coat

Androgen-induced plasticity at a “vocal” neuromuscular synapse

1994 ◽  
Vol 52 ◽  
pp. 32-33
Author(s):  
Darcy B. Kelley ◽  
Martha L. Tobias ◽  
Mark Ellisman
Keyword(s):  
Xenopus Laevis ◽  
Motor Neurons ◽  
Sexual Differentiation ◽  
Molecular Basis ◽  
Neuromuscular Synapse ◽  
Sexually Dimorphic ◽  
Intracellular Protein ◽  
Developmental Program ◽  
Androgen Action ◽  
Clawed Frog

Brain and muscle are sexually differentiated tissues in which masculinization is controlled by the secretion of androgens from the testes. Sensitivity to androgen is conferred by the expression of an intracellular protein, the androgen receptor. A central problem of sexual differentiation is thus to understand the cellular and molecular basis of androgen action. We do not understand how hormone occupancy of a receptor translates into an alteration in the developmental program of the target cell. Our studies on sexual differentiation of brain and muscle in Xenopus laevis are designed to explore the molecular basis of androgen induced sexual differentiation by examining how this hormone controls the masculinization of brain and muscle targets.Our approach to this problem has focused on a highly androgen sensitive, sexually dimorphic neuromuscular system: laryngeal muscles and motor neurons of the clawed frog, Xenopus laevis. We have been studying sex differences at a synapse, the laryngeal neuromuscular junction, which mediates sexually dimorphic vocal behavior in Xenopus laevis frogs.

THE EFFECT OF THE SKIN SECRETION OF XENOPUS LAEVIS ON ITS DERMAL MELANOPHORES

1956 ◽  
Vol 23 (3) ◽  
pp. 265-273 ◽  
Author(s):  
A. C. J. Burgers ◽  
G. J. van Oordt
Keyword(s):  
Xenopus Laevis ◽  
Skin Secretion
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