Evidence map›Paper›PMID 24328168›Full record

ArticleACS synthetic biology2014

Cell-free protein synthesis from a release factor 1 deficient Escherichia coli activates efficient and multiple site-specific nonstandard amino acid incorporation.

Seok Hoon Hong, Ioanna Ntai, Adrian D Haimovich, Neil L Kelleher, Farren J Isaacs, Michael C Jewett

Abstract read
In one paragraph

Article in ACS synthetic biology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
69citing papers in PubMed, 1 pooled it
–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

69 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Review
  6. Cell-free protein synthesis platforms for accelerating drug discovery.Biotechnology notes (Amsterdam, Netherlands) · 2025
    Review
  7. Article
  8. Review
  9. Review
  10. Article
  11. Article
  12. Review
  13. Cell-Free Display Techniques for Protein Evolution.Advances in biochemical engineering/biotechnology · 2023
    Article
  14. Translation initiation consistency betweenFrontiers in bioengineering and biotechnology · 2023
    Article
  15. Advancing synthetic biology through cell-free protein synthesis.Computational and structural biotechnology journal · 2023
    Review
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article

9 more citing papers are in PubMed but not listed here.

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

6 authors.

Seok Hoon HongDepartment of Chemical and Biological Engineering, ‡Chemistry of Life Processes Institute, §Department of Chemistry, and ∥Department of Molecular Biosciences, Northwestern University , Evanston, Illinois 60208, United States of America.
Ioanna Ntai
Adrian D Haimovich
Neil L Kelleher
Farren J Isaacs
Michael C Jewett

Funding

MEDICAL SCIENTIST TRAINING PROGRAMT32GM007205 · NIGMS · YALE UNIVERSITY · PI KAZMIERCZAK, BARBARA I · 1985 to 2019
$42.9M
Eukaryotic Post-Translational ModificationsR01GM067193 · NIGMS · UNIVERSITY OF ILLINOIS URBANA-CHAMPAIGN · PI KELLEHER, NEIL L · 2003 to 2015
$4.0M
NIGMS NIH HHS GM 067193NIGMS NIH HHS MSTP-TG-T32GM07205NIGMS NIH HHS R01 GM067193NIGMS NIH HHS T32 GM007205
6 · The paper itself

Abstract

Site-specific incorporation of nonstandard amino acids (NSAAs) into proteins enables the creation of biopolymers, proteins, and enzymes with new chemical properties, new structures, and new functions. To achieve this, amber (TAG codon) suppression has been widely applied. However, the suppression efficiency is limited due to the competition with translation termination by release factor 1 (RF1), which leads to truncated products. Recently, we constructed a genomically recoded Escherichia coli strain lacking RF1 where 13 occurrences of the amber stop codon have been reassigned to the synonymous TAA codon (rEc.E13.ΔprfA). Here, we assessed and characterized cell-free protein synthesis (CFPS) in crude S30 cell lysates derived from this strain. We observed the synthesis of 190±20 μg/mL of modified soluble superfolder green fluorescent protein (sfGFP) containing a single p-propargyloxy-L-phenylalanine (pPaF) or p-acetyl-L-phenylalanine. As compared to the parent rEc.E13 strain with RF1, this results in a modified sfGFP synthesis improvement of more than 250%. Beyond introducing a single NSAA, we further demonstrated benefits of CFPS from the RF1-deficient strains for incorporating pPaF at two- and five-sites per sfGFP protein. Finally, we compared our crude S30 extract system to the PURE translation system lacking RF1. We observed that our S30 extract based approach is more cost-effective and high yielding than the PURE translation system lacking RF1, ∼1000 times on a milligram protein produced/$ basis. Looking forward, using RF1-deficient strains for extract-based CFPS will aid in the synthesis of proteins and biopolymers with site-specifically incorporated NSAAs.

Indexed as

Cell-Free SystemCodon, TerminatorDNA, BacterialEscherichia coliEscherichia coli ProteinsGene DeletionGreen Fluorescent ProteinsPeptide Termination FactorsPhenylalaninePlasmidsPromoter Regions, GeneticProtein BiosynthesisProtein Conformation3-(4-acetylphenyl)-2-aminopropanoic acid4-propargyloxyphenylalanineCodon, TerminatorDNA, BacterialEscherichia coli ProteinsGreen Fluorescent ProteinsPeptide Termination FactorsPhenylalanineprfA protein, E coli

Identifiers

PMID24328168
PMCPMC4065633

What OpenQuestion holds

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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.