Evidence map›Paper›PMID 19478805›Full record

ArticleNature protocols2009

Construction and flow cytometric screening of targeted enzyme libraries.

Navin Varadarajan, Jason R Cantor, George Georgiou, Brent L Iverson

Abstract read
PubMed Publisher
In one paragraph

Article in Nature protocols, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
–field-weighted citation impact
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

12 citing papers in PubMed.

  1. Review
  2. Article
  3. Article
  4. Making the cut with protease engineering.Cell chemical biology · 2022
    Review
  5. Article
  6. Article
  7. Analysis of amino acid substitutions in AraC variants that respond to triacetic acid lactone.Protein science : a publication of the Protein Society · 2016
    Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Engineering next generation proteases.Current opinion in biotechnology · 2009
    Review
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

4 authors.

Navin VaradarajanInstitute for Cell and Molecular Biology, University of Texas, Austin, TX, USA.
Jason R Cantor
George Georgiou
Brent L Iverson

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Herein, we describe a methodology for the construction of targeted libraries intended to modify the substrate specificity of proteases expressed on the cell surface of Escherichia coli. The native outer membrane protease, OmpT, is used as a model system. The protocol relies on gene assembly using oligonucleotides and is easily adaptable to any enzyme in which information is available on the putative active site residues. Increasingly complex libraries can be generated in a systematic manner and screened using flow cytometry (fluorescence-activated cell sorting, FACS) for variants displaying altered function. Furthermore, if the substrate-binding pockets have not been elucidated, a protocol for partial multi-site saturation library construction is presented that allows for sampling a large number of residues, while maintaining an appropriate level of protein function. The entire procedure, from start to finish, should take approximately 2-3 weeks.

Indexed as

Bacterial Outer Membrane ProteinsCatalytic DomainCell MembraneEnzymesEscherichia coliEscherichia coli ProteinsFlow CytometryModels, MolecularPeptide HydrolasesProtein EngineeringSubstrate SpecificityBacterial Outer Membrane ProteinsEnzymesEscherichia coli ProteinsompT protein, E coliPeptide Hydrolases

Identifiers

PMID19478805

What OpenQuestion holds

Textmetadata
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.