2015
DOI: 10.1107/s2053230x14027599
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Structure of the apo anti-influenza CH65 Fab

Abstract: Influenza viruses remain a persistent challenge to human health owing to their inherent ability to evade the immune response by antigenic drift. However, the discovery of broadly neutralizing antibodies (bnAbs) against divergent viruses has sparked renewed interest in a universal influenza vaccine and novel therapeutic opportunities. Here, a crystal structure at 1.70 Å resolution is presented of the Fab of the human antibody CH65, which has broad neutralizing activity against a range of seasonal H1 isolates. P… Show more

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Cited by 5 publications
(3 citation statements)
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References 25 publications
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“…The diffraction data sets were processed and scaled with the XDS (Kabsch, 2010) and scala (Winn et al, 2011) program software packages. The crystal structure of Fabs was determined by molecular replacement with Phaser (McCoy et al, 2007) using the variable and constant domains of Fabs in the PDB (4WUK, 4HKB) (Lee et al 2015, Schmidt et al, 2013 as search models for CH65:1203d4/CH65:7969d2 and CH67:1203d4, respectively. The model was rebuilt iteratively using Coot (Emsley and Cowtan, 2004) and refined in Phenix (Adams et al, 2010).…”
Section: Methods Detailsmentioning
confidence: 99%
“…The diffraction data sets were processed and scaled with the XDS (Kabsch, 2010) and scala (Winn et al, 2011) program software packages. The crystal structure of Fabs was determined by molecular replacement with Phaser (McCoy et al, 2007) using the variable and constant domains of Fabs in the PDB (4WUK, 4HKB) (Lee et al 2015, Schmidt et al, 2013 as search models for CH65:1203d4/CH65:7969d2 and CH67:1203d4, respectively. The model was rebuilt iteratively using Coot (Emsley and Cowtan, 2004) and refined in Phenix (Adams et al, 2010).…”
Section: Methods Detailsmentioning
confidence: 99%
“…rim of influenza RBD) and adding or removing glycans. These immune evasion mechanisms can therefore require long CDR loops to reach sites of vulnerability (9, 10) or short CDR loops to avoid clashes and allow closer proximity (6). Structure-based design must account for these immune-evasion mechanisms.…”
Section: Concepts Of Antibody Neutralization and B Cell Targetingmentioning
confidence: 99%
“…Importantly, these epistatic interactions are essential for the acquisition of affinity to both MA90-G189E and SI06. To investigate the molecular details of this epistasis, we compared the crystal structures of the unbound UCA, I-2, and CH65 as well as CH65 bound to SI06 3,4,64 . Additionally, we produced several variants as recombinant IgG to assay the binding kinetics by biolayer interferometry.…”
Section: Resultsmentioning
confidence: 99%