0000000000445615
AUTHOR
Alberto Marina
SARS-CoV-2 antibodies, serum inflammatory biomarkers and clinical severity of hospitalized COVID-19 patients
Background The involvement of SARS-CoV-2 antibodies in mediating immunopathogenetic events in COVID-19 patients has been suggested. By using several experimental approaches, we investigated the potential association between SARS-CoV-2 IgGs recognizing the spike (S) protein receptor-binding domain (RBD), neutralizing antibodies (NtAb) targeting S, and COVID-19 severity. Patients and methods This unicenter, retrospective, observational study included 51 hospitalized patients (24 at the intensive care unit; ICU). A total of 93 sera from these patients collected at different time points from the onset of symptoms were analyzed. SARS-CoV-2 RBD IgGs were quantitated by ELISA and NtAb50 titers wer…
Unraveling the role of the secretor antigen in human rotavirus attachment to histo-blood group antigens
25 Páginas, 7 figuras, 2 tablas
Structures of collagen IV globular domains: insight into associated pathologies, folding and network assembly
15 páginas, 6 figuras, 1 tabla.
Evolutionary and phenotypic characterization of spike mutations in a new SARS-CoV-2 Lineage reveals two Variants of Interest
Molecular epidemiology of SARS-CoV-2 aims to monitor the appearance of new variants with the potential to change the virulence or transmissibility of the virus. During the first year of SARS-CoV-2 evolution, numerous variants with possible public health impact have emerged. We have detected two mutations in the Spike protein at amino acid positions 1163 and 1167 that have appeared independently multiple times in different genetic backgrounds, indicating they may increase viral fitness. Interestingly, the majority of these sequences appear in transmission clusters, with the genotype encoding mutations at both positions increasing in frequency more than single-site mutants. This genetic outco…
Structure-based analyses of Salmonella RcsB variants unravel new features of the Rcs regulon
18 páginas, 7 figuras, 2 tablas
Conformational dynamism for DNA interaction in the Salmonella RcsB response regulator
17 páginas, 7 figuras, 1 tabla
Structural and Functional Characterization of Autophosphorylation in Bacterial Histidine Kinases
Autophosphorylation of histidine kinases (HK) is the first step for signal transduction in bacterial two-component signalling systems. As HKs dimerize, the His residue is phosphorylated in cis or trans depending on whether the ATP molecule used in the reaction is bound to the same or the neighboring subunit, respectively. The cis or trans autophosphorylation results from an alternative directionality in the connection between helices α1 and α2 in the HK DHp domain, in such a way that α2 could be oriented almost 90° counterclockwise or clockwise with respect to α1. Sequence and length variability of this connection appears to lie behind the different directionality and is implicated in partn…
The malate sensing two-component system MaeKR is a non-canonical class of sensory complex for C4-dicarboxylates
16 páginas, 7 figuras, 2 tablas
Structures of collagen IV globular domains: insight into associated pathologies, folding and network assembly. Corrigendum
The article by Casino et al. [IUCrJ (2018). 5, 765–779] is corrected.
Revisiting the pH-gated conformational switch on the activities of HisKA-family histidine kinases
13 páginas, 6 figuras, 3 tablas