09.02.2013 Views

Cancer Research in Switzerland - Krebsliga Schweiz

Cancer Research in Switzerland - Krebsliga Schweiz

Cancer Research in Switzerland - Krebsliga Schweiz

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Santamaria Anna | Control of chromosome segregation<br />

fidelity by the Ska complex, a key regulator of<br />

stable k<strong>in</strong>etochore-microtubule attachments dur<strong>in</strong>g<br />

mitosis (KFS 02657­08­2010)<br />

Duration: 01.02.2011– 01.02.2014<br />

Dur<strong>in</strong>g development of every organism, each divid<strong>in</strong>g cell<br />

must partition its replicated genome equally <strong>in</strong>to each<br />

new daughter cell. Errors <strong>in</strong> this process lead to aneuploid<br />

daughter cells with abnormal numbers of chromosomes.<br />

Aneuploidy is a remarkably common characteristic of aggressive<br />

tumours. Compell<strong>in</strong>g evidence suggests that excessively<br />

stable k<strong>in</strong>etochore­microtubule (KT­MT) attachments<br />

are the root cause of chromosomal <strong>in</strong>stability (CIN)<br />

<strong>in</strong> many cancer cells. Central to the mach<strong>in</strong>ery required<br />

for establish<strong>in</strong>g stable KT­MT attachments is the Ska (for<br />

sp<strong>in</strong>dle and k<strong>in</strong>etochore­associated) complex. Our goal is<br />

to elucidate the role of the Ska complex <strong>in</strong> generat<strong>in</strong>g stable<br />

KT­MT attachments dur<strong>in</strong>g mitosis <strong>in</strong> human cells by:<br />

1) identify<strong>in</strong>g its <strong>in</strong>teraction partners and study<strong>in</strong>g the<br />

regulation of the Ska complex by phosphorylation us<strong>in</strong>g<br />

biochemical and cell biological techniques; 2) resolve the<br />

structure of the Ska complex by X­ray crystallography;<br />

3) analyze the abundance, stochiometry and dynamics of<br />

endogenous Ska prote<strong>in</strong>s <strong>in</strong> both normal and tumour cells<br />

us<strong>in</strong>g mass spectrometry­based techniques. These studies<br />

should allow us to determ<strong>in</strong>e whether prote<strong>in</strong> imbalances<br />

<strong>in</strong> key regulators of KT­MT attachments are a likely root<br />

cause of CIN <strong>in</strong> cancer cells. This will provide an opportunity<br />

to explore KT­related pathways and strategies that<br />

elevate chromosome missegregation beyond tolerable<br />

levels for therapeutic applications.<br />

Project coord<strong>in</strong>ator<br />

Dr. Anna Santamaria<br />

Departement Biozentrum<br />

Universität Basel<br />

Kl<strong>in</strong>gelbergstrasse 50/70<br />

CH­4056 Basel<br />

Phone +41 (0)61 267 18 93<br />

Fax +41 (0)61 267 20 09<br />

anna.santamaria@unibas.ch

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!