Project description:We present HDX-MS data of WT and L89W TbMscL to interrogate the mechanism of molecular activation in this mechanosensitive channel.
Project description:We present HDX-MS data of apo-SurA, SurA in complex with OmpX, OmpF and a peptide with sequence WEYIPNV to define (1) interdomain dynamics in the periplasmic chaperone SurA, and (2) the binding site of OmpX, OmpF and WEYIPNV on SurA.
Project description:Loss of WRN, a DNA repair helicase, was identified as a strong vulnerability of microsatellite instable(MSI) cancers, making WRN a promising drug target. We show that ATP binding and hydrolysis are required for genome integrity and viability of MSI cancer cells. We report a 2.2 Å crystal structure of the WRN helicase core (517-1093), comprising the two helicase subdomains and winged helix domain but not the HRDC domain or nuclease domains. The structure highlights unusual features: First, an atypical mode of nucleotide binding that results in unusual relative positioning of the two helicase subdomains. Second, an additional β-hairpin in the second helicase subdomain and an unusual helical hairpin in the Zn2+ binding domain. Modelling of the WRN helicase in complex with DNA suggests roles for these features in the binding of alternative DNA structures. NMR analysis of shows a weak interaction between the HRDC domain and the helicase core, indicating a possible biological role for this association. Together, this study will facilitate the structure-based development of inhibitors against WRN helicase.
Project description:We present HDX-MS data of the trigger factor:GAPDH complex to define the interaction sites for GAPDH on trigger factor and the structure of GAPDH in the bound state.
Project description:Here we have used HDX-MS to investigate the change in structure/dynamics in NicA2 and a variant with increased activity (v321) that was generated using directed evolution
Project description:Nerve growth factor (NGF) is involved in the maintenance and growth of specific neuronal populations whereas its precursor, proNGF, shows opposite properties, like being involved in apoptosis. NGF/proNGF imbalance is linked to neurodegeneration. Here, we show that ATP binds to proNGF inducing an overall proNGF shape change, throughout a local conformational rearrangement of the flexible pro-peptide domain. This suggests a functional role for ATP in the modulation of proNGF/NGF physiological homeostasis.
Project description:Here, we have used a SARS-naïve, bovine ultralong CDRH3 library to isolate a bovine paratope that engages the SARS-CoV and SARS-CoV-2 receptor-binding domain (RBD). This scFv (B9-scFv) neutralises viruses pseudo-typed with SARS-CoV Spike protein. Using differential hydrogen-deuterium exchange mass spectrometry and site-directed mutagenesis, we demonstrate that this CDRH3 recognises a conserved, cryptic epitope.