scholarly journals Potential structural role of non-coding and coding RNAs in the organization of the cytoskeleton at the vegetal cortex of Xenopus oocytes

Development ◽  
2005 ◽  
Vol 132 (15) ◽  
pp. 3445-3457 ◽  
Author(s):  
M. Kloc
Keyword(s):  
Xenopus Oocytes ◽  
Structural Role ◽  
Vegetal Cortex

The Role of Solid Springer in Masonry Vault

2010 ◽  
Vol 133-134 ◽  
pp. 349-354 ◽  
Author(s):  
Vittorio Ceradini ◽  
Michele Candela ◽  
Roberta Fonti
Keyword(s):  
Scientific Research ◽  
Evolution Process ◽  
Limit Case ◽  
Structural Configuration ◽  
Structural Role ◽  
Different Ages ◽  
Building Component ◽  
And Function ◽  
Technical Rules

During a scientific research, directed to understand the structural role of some particular masonry elements, noticeable in covering structures like vault and dome, we searched the technical rules and function of these elements. We verified that in literature there is no specific documentation about these elements and its mechanic purposes. The study was directed to recognize the most representatives architectures in different ages, and to identify the construction technique’s evolution process of this particular arc-double or thickening of arc that we arrived to identify as a necessary building component to give balance in particular structural configuration. This process put down roots from the roman ancient age, until baroque age, where the most original applications of this regulation were placed. From Pantheon to the limit case of St. Filippo Neri chapel, the covers’ structures springer angle studied was analyzed together with its relation to plan, sections and elevation of all buildings. Therefore, if these elements are well-performed, they follow precise constructive patterns that this article would like to identify and show.

scholarly journals Structure and solubility behaviour of zinc containing phosphate glasses

2015 ◽  
Vol 3 (45) ◽  
pp. 8842-8855 ◽  
Author(s):  
N. Kanwal ◽  
H. Toms ◽  
A. C. Hannon ◽  
F. A. Perras ◽  
D. L. Bryce ◽  
...  
Keyword(s):  
Phosphate Glasses ◽  
Structural Role ◽  
Role Of Zn

The structural role of Zn and its effect on solubility in phosphate based bioglasses is investigated.

scholarly journals Catalytic and structural role of the metal ion in dUTP pyrophosphatase

2003 ◽  
Vol 100 (10) ◽  
pp. 5670-5675 ◽  
Author(s):  
D. Mustafi ◽  
A. Bekesi ◽  
B. G. Vertessy ◽  
M. W. Makinen
Keyword(s):  
Metal Ion ◽  
Structural Role

scholarly journals Requirement of mosXe protein kinase for meiotic maturation of Xenopus oocytes induced by a cdc2 mutant lacking regulatory phosphorylation sites.

1992 ◽  
Vol 12 (7) ◽  
pp. 3192-3203 ◽  
Author(s):  
K M Pickham ◽  
A N Meyer ◽  
J Li ◽  
D J Donoghue
Keyword(s):  
Protein Kinase ◽  
Oocyte Maturation ◽  
Xenopus Oocytes ◽  
Germinal Vesicle ◽  
Cyclin B1 ◽  
Phosphorylation Sites ◽  
Germinal Vesicle Breakdown ◽  
Regulatory Phosphorylation

The p34cdc2 protein kinase is a component of maturation-promoting factor, the master regulator of the cell cycle in all eukaryotes. The activity of p34cdc2 is itself tightly regulated by phosphorylation and dephosphorylation. Predicted regulatory phosphorylation sites of Xenopus p34cdc2 were mutated in vitro, and in vitro-transcribed RNAs were injected into Xenopus oocytes. The cdc2 single mutants Thr-14----Ala and Tyr-15----Phe did not induce germinal vesicle breakdown (BVBD) upon microinjection into oocytes. In contrast, the cdc2 double mutant Ala-14/Phe-15 did induce GVBD. Both the Ala-14 and Ala-14/Phe-15p34cdc2 mutants were shown to coimmunoprecipitate cyclin B1 and to phosphorylate histone H1 in immune complex kinase assays. Microinjection of antisense oligonucleotides to c-mosXe was used to demonstrate the role of mos protein synthesis in the induction of GVBD by the Ala-14/Phe-15 cdc2 mutant. Thr-161 was also mutated. p34cdc2 single mutants Ala-161 and Glu-161 and triple mutants Ala-14/Phe-15/Ala-161 and Ala-14/Phe-15/Glu-161 failed to induce GVBD in oocytes and showed a decreased binding to cyclin B1 in coimmunoprecipitations. Each of the cdc2 mutants was also assayed by coinjection with cyclin B1 or c-mosXe RNA into oocytes. Several of the cdc2 mutants were found to affect the kinetics of cyclin B1 and/or mos-induced GVBD upon coinjection, although none affected the rate of progesterone-induced maturation. We demonstrate here the significance of Thr-14, Tyr-15, and Thr-161 of p34cdc2 in Xenopus oocyte maturation. In addition, these results suggest a regulatory role for mosXe in induction of oocyte maturation by the cdc2 mutant Ala-14/Phe-15.

scholarly journals TMalphaDB and TMbetaDB: web servers to study the structural role of sequence motifs in α-helix and β-barrel domains of membrane proteins

2015 ◽  
Vol 16 (1) ◽  
Author(s):  
Marc Perea ◽  
Ivar Lugtenburg ◽  
Eduardo Mayol ◽  
Arnau Cordomí ◽  
Xavier Deupí ◽  
...  
Keyword(s):  
Membrane Proteins ◽  
Sequence Motifs ◽  
Web Servers ◽  
Structural Role ◽  
Α Helix

Structural role of chromium sulfate in modified borate glasses and glass ceramics

Materialia ◽  
2021 ◽  
pp. 101095
Author(s):  
G. El-Damrawi ◽  
A.M. Abdelghany ◽  
M.I. Abdelghany ◽  
M.A. Madshal
Keyword(s):  
Glass Ceramics ◽  
Borate Glasses ◽  
Structural Role ◽  
Chromium Sulfate
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