Science@FELs 2020

Session

Session 2 - Biology Applications

14 Sept 2020, 15:05

29. Ultrafast Electronic and Structural Dynamics of Heme Proteins Probed by Time-resolved X-ray Spectroscopy at XFELs

Dr Camila Bacellar (PSI)

14/09/2020, 15:05

Iron-containing heme proteins are amongst the most important known proteins and the metal-binding center is paramount to the function of these systems. Much effort has been dedicated to the study of the structure, function and dynamics of these proteins. Time-resolved X-ray spectroscopy is a particularly well-suited tool for this purpose given that the element specificity provides a direct and...

78. Untangling the sequence of events during the S-state transitions in Photosystem II

Dr Junko Yano (Lawrence Berkeley National Laboratory)

14/09/2020, 15:35

The water oxidation reaction in nature occurs in Photosystem II (PS II), multi-subunit protein complex, in which the Mn4CaO5 cluster catalyzes the reaction. The reaction comprises four (meta)stable intermediates (S0, S1, S2 and S3) and one transient S4 state, which precedes dioxygen formation occurring in a concerted reaction from two water-derived oxygens bound at the OEC. This reaction is...