TWISTING THE BOUNDARIES ROLE OF TOPOISOMERASE 1 AT THE NUCLEAR LAMINA
When DNA is transcribed or replicated, torsional stress accumulates on the double helix. This tension must be dissipated by spreading it along the DNA fiber, or it must be removed altogether. One of the main factors responsible fo...
ver más
¿Tienes un proyecto y buscas un partner? Gracias a nuestro motor inteligente podemos recomendarte los mejores socios y ponerte en contacto con ellos. Te lo explicamos en este video
Proyectos interesantes
TOPOmics
Global dynamics of topoisomerase induced DNA breaks
2M€
Cerrado
PID2020-119570RB-I00
IMPLICACIONES FISIOPATOLOGICAS DEL SUPERENROLLAMIENTO DE ADN...
454K€
Cerrado
TOPO-BREAKS
Topoisomerase induced DNA breaks link with cancer and neuro...
45K€
Cerrado
SAF2010-21017
ROTURAS EN EL ADN PRODUCIDAS POR TOPOISOMERASAS: RELACION CO...
194K€
Cerrado
RecInRep
Beyond double strand break repair specific mechanisms of ho...
175K€
Cerrado
PID2020-116003GB-I00
GENOMICA AVANZADA PARA EL ESTUDIO DE LA INTEGRIDAD DE CROMOS...
272K€
Cerrado
Información proyecto TorsionAtLamina
Duración del proyecto: 40 meses
Fecha Inicio: 2019-04-09
Fecha Fin: 2022-08-31
Fecha límite de participación
Sin fecha límite de participación.
Descripción del proyecto
When DNA is transcribed or replicated, torsional stress accumulates on the double helix. This tension must be dissipated by spreading it along the DNA fiber, or it must be removed altogether. One of the main factors responsible for the removal of such stress is DNA Topoisomerase I (Top1), an important target of cancer chemotherapy. When Top1 activity is lost, torsional stress accumulates on transcriptionally active genes and can lead to the formation of non-canonical DNA/RNA hybrid structures called R loops. These structures are emerging as important regulators of genome function and stability. By genome-wide mapping of R loops in human cells, I recently found that depletion of Top1 leads to a marked R loop stabilization, specifically on genes that are anchored to the nuclear lamina. This strongly suggests that attachment of DNA to the nuclear lamina may prevent dissipation of torsional stress, but how this works is still largely unclear. I propose to investigate the causal relationships between torsonal stress, Top1, R-loops and nuclear lamina attachment, taking advantage of a suite of unique genomics techniques developed in the host lab. Specifically, I will: 1) Develop two novel reporter assays to probe the effects of chromatin context (in particular lamina associated chromatin) and Top1 on torsional stress and R loop formation, at thousands of locations in the human genome. 2) Investigate if and how Top1 regulates DNA/nuclear lamina contacts by by means of a novel version of the powerful genome-wide DamID mapping method with much-improved time resolution. My expertise in Top1, R-loops and DNA topology combined with the unique genomics methodologies in the host lab, as well as their expertise in lamina-associated DNA, will lead to a unique synergy that should result in new insights into the relationship between nuclear organization, torsional stress and R loop formation. Moreover, it will yield new methods that will boost scientific progress in this field.