Cancer Research in Switzerland - Krebsliga Schweiz
Cancer Research in Switzerland - Krebsliga Schweiz
Cancer Research in Switzerland - Krebsliga Schweiz
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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