Sebastian M. Fica is a molecular biologist studying how the spliceosome carries out RNA splicing. His work connects biochemical tests of chemical mechanism with structural analysis of the RNA–protein machine. His Oxford laboratory biography records a doctorate in cell and molecular biology in 2013 and a move into structural postdoctoral work in 2014.[ref]
Sebastian M. Fica laboratory biography at the University of Oxford. “Short biography”: doctoral work on splicing catalysis and subsequent training in electron cryo-microscopy.
In a 2013 collaborative study, Fica and colleagues used substitutions in U6 small nuclear RNA and metal-rescue assays in assembled yeast spliceosomes. Their results connected RNA ligands to catalytic metals in both splicing reactions. The paper marks equal contributions by its first two authors; the result belongs to the collaborating team.[ref]
The scientific question is sharper than asking whether RNA is present near a reaction. An RNA component might hold other molecules in place, or its own chemical groups might help build the catalytic center. Perturbing a candidate group and testing a compensating chemical change links structure to function. Structural snapshots complement such tests by locating molecular contacts, while reaction assays ask whether those contacts matter for catalysis.
Oxford's departmental profile describes his group's combination of biochemical and structural approaches to splice-site selection and catalytic dynamics.[ref]
https://www.bioch.ox.ac.uk/node/1889921. Departmental research profile, “Mechanisms and molecular structure of the spliceosome during pre-mRNA splicing”
Sebastian M. Fica, portrait identified on his University of Oxford departmental profile
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