Evidence map›Paper›PMID 28676891›Full record

ArticleJournal of industrial microbiology & biotechnology2017

Improvement in ethanol productivity of engineered E. coli strain SSY13 in defined medium via adaptive evolution.

Syed Bilal Jilani, Siva Sai Krishna Venigalla, Anu Jose Mattam, Chandra Dev, Syed Shams Yazdani

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Article in Journal of industrial microbiology & biotechnology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing 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

9 citing papers in PubMed.

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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

5 authors.

Syed Bilal JilaniMicrobial Engineering Group, International Center for Genetic Engineering and Biotechnology (ICGEB), P.O. Box No. 10504, Aruna Asaf Ali Marg, New Delhi, 110067, India.
Siva Sai Krishna VenigallaMicrobial Engineering Group, International Center for Genetic Engineering and Biotechnology (ICGEB), P.O. Box No. 10504, Aruna Asaf Ali Marg, New Delhi, 110067, India.
Anu Jose MattamMicrobial Engineering Group, International Center for Genetic Engineering and Biotechnology (ICGEB), P.O. Box No. 10504, Aruna Asaf Ali Marg, New Delhi, 110067, India.
Chandra DevMicrobial Engineering Group, International Center for Genetic Engineering and Biotechnology (ICGEB), P.O. Box No. 10504, Aruna Asaf Ali Marg, New Delhi, 110067, India.
Syed Shams YazdaniMicrobial Engineering Group, International Center for Genetic Engineering and Biotechnology (ICGEB), P.O. Box No. 10504, Aruna Asaf Ali Marg, New Delhi, 110067, India. shams@icgeb.res.in.ORCID http://orcid.org/0000-0002-6558-4612

Funding

Department of Biotechnology , Ministry of Science and Technology BT/PB/Center/03/2011
6 · The paper itself

Abstract

E. coli has the ability to ferment both C5 and C6 sugars and produce mixture of acids along with small amount of ethanol. In our previous study, we reported the construction of an ethanologenic E. coli strain by modulating flux through the endogenous pathways. In the current study, we made further changes in the strain to make the overall process industry friendly; the changes being (1) removal of plasmid, (2) use of low-cost defined medium, and (3) improvement in consumption rate of both C5 and C6 sugars. We first constructed a plasmid-free strain SSY13 and passaged it on AM1-xylose minimal medium plate for 150 days. Further passaging was done for 56 days in liquid AM1 medium containing either glucose or xylose on alternate days. We observed an increase in specific growth rate and carbon utilization rate with increase in passage numbers until 42 days for both glucose and xylose. The 42nd day passaged strain SSK42 fermented 113 g/L xylose in AM1 minimal medium and produced 51.1 g/L ethanol in 72 h at 89% of maximum theoretical yield with ethanol productivity of 1.4 g/L/h during 24-48 h of fermentation. The ethanol titer, yield and productivity were 49, 40 and 36% higher, respectively, for SSK42 as compared to unevolved SSY13 strain.

Indexed as

Directed Molecular EvolutionBioreactorsCulture MediaEscherichia coliEthanolFermentationGlucoseXyloseCulture MediaEthanolGlucoseXyloseE. coliGlucoseMinimal mediaNative ethanol pathwayXylose

Identifiers

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Registered trials

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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.