What question did this study set out to answer?

To identify the molecular mechanisms and specific charged residues that regulate pH sensing, structural stability, and membrane fusion in the human metapneumovirus F protein.

July 4, 2012Journal of VirologyOpen Access

Potential Electrostatic Interactions in Multiple Regions Affect Human Metapneumovirus F-Mediated Membrane Fusion

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Population

Human metapneumovirus (HMPV) strain CAN97-83 F protein and recombinant viruses

Comparison

Site-directed mutagenesis at position 435 and… vs Wild-type HMPV F protein

Design

Preclinical

Authors

ACAndrés ChangEmory University BHBrent A. HackettUniversity of Pennsylvania CWChristine WinterHumboldt-Universität zu Berlin

Discussion

Member takes

Implication

Animal data on HMPV F residue 435 require human validation; leaves open electrostatic targeting for future antivirals.

Key Points

To identify the molecular mechanisms and specific charged residues that regulate pH sensing, structural stability, and membrane fusion in the human metapneumovirus F protein.
Conducted site-directed mutagenesis targeting residue H435 and adjacent basic residues (K295, R396, K438) in the HRB linker domain of the CAN97-83 F protein.
Mutated acidic residues (E51, D54, E56) in the charged F(2) domain and characterized local folding, protein stability, and fusion activity in cell culture and recombinant viruses.
Replacing H435 with positively charged arginine or lysine produced a hyperfusogenic F protein, whereas substitution with negatively charged aspartate or glutamate completely abolished membrane fusion.
Neutralizing charges at residues E51, D54, and E56 disrupted local folding and overall stability of the F protein, markedly decreasing viral fusion activity.

Structured PICO

Population

Human metapneumovirus (HMPV) strain CAN97-83 F protein and recombinant viruses

Intervention

Site-directed mutagenesis at position 435 (arginine, lysine, aspartate, glutamate) and residues E51, D54, E56

Comparator

Wild-type HMPV F protein

Outcome

F-mediated membrane fusion activity and F protein stabilitysurrogate

Charged residues and electrostatic interactions are critical for the function, pH sensing, and stability of the HMPV F protein.

Cite This Study

Chang et al. (2012) studied this question.

synapsesocial.com/papers/6a70f76535aa2c282ce24b39 https://doi.org/10.1128/jvi.00639-12

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Potential Electrostatic Interactions in Multiple Regions Affect Human Metapneumovirus F-Mediated Membrane Fusion

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Potential Electrostatic Interactions in Multiple Regions Affect Human Metapneumovirus F-Mediated Membrane Fusion

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

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