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Editorial

Lasker goes transcriptional p841

doi:10.1038/ncb1003-841


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Book Review

In the path of art and science: Dresden's red pill p843

A. Ruiz i Altaba reviews Gentle Bridges: Architecture, Art and Science by R. Anthony Hyman, Gerhard Mack, Juhani Pallasmaa & Marino Zerial

doi:10.1038/ncb1003-843


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News and Views

How attraction turns to repulsion pp851 - 853

David G. Wilkinson

doi:10.1038/ncb1003-851

During cell-contact-mediated repulsion, an initially adhesive interaction between a receptor and its ligand ultimately results in a repulsive response that causes the cells to separate. Two studies looking at the case of Eph receptors and ephrins now identify a crucial role for endocytosis in this enigmatic process.


Hippo and its mission for growth control pp853 - 855

Hyung Don Ryoo & Hermann Steller

doi:10.1038/ncb1003-853

During development, tissue growth is controlled by coordinated cellular growth and apoptosis. A series of recent papers describes a newly identified Drosophila gene, hippo, that restricts excessive growth during development by both limiting cell cycle progression and promoting susceptibility to apoptosis. Therefore, hippo may coordinate the regulation of cell division and cell death.


From shoot to root p855

Alison Schuldt

doi:10.1038/ncb1003-855


Cdc34: cycling on and off the SCF pp856 - 857

Lionel Pintard & Matthias Peter

doi:10.1038/ncb1003-856

Polyubiquitination of substrates requires the coordinated and sequential action of three enzymes: E1, E2 and E3. Now, a study shows that activated E2 associates transiently with E3, and that subsequent release of the E2 is functionally required for substrate polyubiquitination.


Of fertility, cystic fibrosis and the bicarbonate ion pp857 - 859

Keith A. Sutton, Melissa K. Jungnickel & Harvey M. Florman

doi:10.1038/ncb1003-857

Mammalian sperm require activation within the female reproductive tract to fertilize eggs, and bicarbonate is essential for this process in vitro. A recent study implicates the cystic fibrosis transmembrane regulator (CFTR) as a possible regulator for bicarbonate release in vivo.


Timing the cell cycle pp859 - 861

Luca Cardone & Paolo Sassone-Corsi

doi:10.1038/ncb1003-859

Most cells contain two endogenous clocks, one devoted to the control of cell division and the other acting as circadian pacemaker. Although classically thought to be independent, recent findings challenge this view, as molecular components of the circadian clock directly regulate WEE1, a kinase that inhibits mitosis by inactivating Cdc2/cyclin B.


Wnt signalling gets XEEKy pp861 - 863

Wilson K. Clements & David Kimelman

doi:10.1038/ncb1003-861

The putative tumour suppressor LKB1/XEEK1 (Xenopus egg and embryo kinase 1) has been implicated in many cellular processes and signalling pathways. Now, XEEK1 is found to exist in a complex with GSK3 (glycogen synthase kinase 3) and protein kinase C zeta (PKCzeta), resulting in increased Wnt signal transduction during embryonic development. This discovery positions XEEK1 as a potential intersection point for crosstalk between Wnt and other pathways.


Can Fizzy fly solo? pp864 - 865

Peter K. Jackson

doi:10.1038/ncb1003-864

To ensure genome stability, the S-phase checkpoint blocks spindle elongation during S phase. Later, the spindle assembly checkpoint blocks chromosome segregation by restraining CDC20/Fizzy-dependent activation of the anaphase-promoting complex (APC). Now, a study suggests that the S-phase checkpoint also limits accumulation of Cdc20p and, unexpectedly, an APC-independent CDC20 function for spindle elongation.


Cell of the month: Human Langerhans cell in a dermal lymphatic vessel p867

Kristian Pfaller

doi:10.1038/ncb1003-867


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Letters

S-phase checkpoint controls mitosis via an APC-independent Cdc20p function pp928 - 935

Duncan J. Clarke, Marisa Segal, Catherine A. Andrews, Stanislav G. Rudyak, Sanne Jensen, Karen Smith & Steven I. Reed

doi:10.1038/ncb1046

See also: News and Views by Jackson


Involvement of CFTR in uterine bicarbonate secretion and the fertilizing capacity of sperm pp902 - 906

Xiao Fei Wang, Chen Xi Zhou, Qi Xian Shi, Yu Ying Yuan, Mei Kuen Yu, Louis Chukwuemeka Ajonuma, Lok Sze Ho, Pui Shan Lo, Lai Ling Tsang, Yu Liu, Sun Yi Lam, Ling Nga Chan, Wen Chao Zhao, Yiu Wa Chung & Hsiao Chang Chan

doi:10.1038/ncb1047

See also: News and Views by Sutton et al.







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