Evidence map›Paper›PMID 24964247›Full record

ArticleBiotechnology journal2014

Construction of pH-sensitive Her2-binding IgG1-Fc by directed evolution.

Michael W Traxlmayr, Elisabeth Lobner, Christoph Hasenhindl, Gerhard Stadlmayr, Chris Oostenbrink, Florian Rüker, Christian Obinger

Open access · bronzeAbstract read
In one paragraph

Article in Biotechnology journal, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
3.2field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 31 citations in OpenAlex.

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  7. Yeast Display Guided Selection of pH-Dependent Binders.Methods in molecular biology (Clifton, N.J.) · 2022
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 1 institution in 1 country.

Michael W TraxlmayrChristian Doppler Laboratory for Antibody Engineering at Department of Chemistry and Department of Biotechnology, BOKU - University of Natural Resources and Life Sciences, Vienna, Austria; Department of Chemistry, Vienna Institute of BioTechnology, BOKU - University of Natural Resources and Life Sciences, Vienna, Austria.
Elisabeth Lobner
Christoph Hasenhindl
Gerhard Stadlmayr
Chris Oostenbrink
Florian Rüker
Christian Obinger
BOKU University · AT

Funding

Austrian Science Fund FWF W 1224
6 · The paper itself

Abstract

For most therapeutic proteins, a long serum half-life is desired. Studies have shown that decreased antigen binding at acidic pH can increase serum half-life. In this study, we aimed to investigate whether pH-dependent binding sites can be introduced into antigen binding crystallizable fragments of immunoglobulin G1 (Fcab). The C-terminal structural loops of an Fcab were engineered for reduced binding to the extracellular domain of human epidermal growth factor receptor 2 (Her2-ECD) at pH 6 compared to pH 7.4. A yeast-displayed Fcab-library was alternately selected for binding at pH 7.4 and non-binding at pH 6.0. Selected Fcab variants showed clear pH-dependent binding to soluble Her2-ECD (decrease in affinity at pH 6.0 compared to pH 7.4) when displayed on yeast. Additionally, some solubly expressed variants exhibited pH-dependent interactions with Her2-positive cells whereas their conformational and thermal stability was pH-independent. Interestingly, two of the three Fcabs did not contain a single histidine mutation but all of them contained variations next to histidines that already occurred in loops of the lead Fcab. The study demonstrates that yeast surface display is a valuable tool for directed evolution of pH-dependent binding sites in proteins.

Indexed as

Directed Molecular EvolutionBinding SitesErb-b2 Receptor Tyrosine KinasesHumansHydrogen-Ion ConcentrationImmunoglobulin Fc FragmentsImmunoglobulin GMolecular Dynamics SimulationPichiaProtein ConformationProtein Structure, SecondaryERBB2 protein, humanErb-b2 Receptor Tyrosine KinasesImmunoglobulin Fc FragmentsImmunoglobulin GAntibody engineeringDirected evolutionFcabpH-depending bindingYeast surface display

Identifiers

PMID24964247
PMCPMC4314675
OpenAlexW1995543126

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.