Evidence map›Paper›PMID 33256757›Full record

ArticleMicrobial cell factories2020

The generation of metabolic changes for the production of high-purity zeaxanthin mediated by CRISPR-Cas9 in Chlamydomonas reinhardtii.

Inhwa Song, Jongrae Kim, Kwangryul Baek, Young Choi, ByongCheol Shin, EonSeon Jin

Open access · goldAbstract read
In one paragraph

Article in Microbial cell factories, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
2.6field-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

25 citing papers in PubMed, 89 citations in OpenAlex.

  1. Review
  2. Review
  3. Review
  4. Review
  5. Article
  6. CRISPR-Cas Technology TurnsMarine drugs · 2025
    Review
  7. Article
  8. Article
  9. EngineeredLife (Basel, Switzerland) · 2025
    Article
  10. Review
  11. Progress and challenges in CRISPR/Cas applications in microalgae.Journal of microbiology (Seoul, Korea) · 2025
    Review
  12. Review
  13. Review
  14. Article
  15. Article
  16. Article
  17. Promoting Photosynthetic Production of Dammarenediol-II inInternational journal of molecular sciences · 2023
    Article
  18. Article
  19. Molecules (Basel, Switzerland) · 2023
    Review
  20. 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

6 authors at 1 institution in 1 country.

Inhwa SongDepartment of Life Science, Research Institute for Natural Sciences, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea.
Jongrae KimDepartment of Life Science, Research Institute for Natural Sciences, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea.
Kwangryul BaekDepartment of Life Science, Research Institute for Natural Sciences, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea.
Young ChoiArca Eir, C-323, Daedeok Biz Center, 17 Techno4-ro, Yuseong-gu, Daejeon, 34013, Republic of Korea.
ByongCheol ShinArca Eir, C-323, Daedeok Biz Center, 17 Techno4-ro, Yuseong-gu, Daejeon, 34013, Republic of Korea.
EonSeon JinDepartment of Life Science, Research Institute for Natural Sciences, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea. esjin@hanyang.ac.kr.ORCID http://orcid.org/0000-0001-5691-0124
Hanyang University · KR

Funding

Ministry of Oceans and Fisheries (KR) 20190066Ministry of Science, ICT and Future Planning 2014M1A8A1 049273Ministry of Science, ICT and Future Planning NRF-2020R1A2C2011998
6 · The paper itself

Abstract

backgroundZeaxanthin, a major xanthophyll pigment, has a significant role as a retinal pigment and antioxidant. Because zeaxanthin helps to prevent age-related macular degeneration, its commercial use in personalized nutritional and pharmaceutical applications has expanded. To meet the quantitative requirements for personalized treatment and pharmaceutical applications, it is necessary to produce highly purified zeaxanthin.

resultsIn this study, to meet the quantitative requirements for industrial applications, we generated a double knockout mutant which is gene-edited by the CRISPR-Cas9 ribonucleoprotein-mediated knock-in system. The lycopene epsilon cyclase (LCYE) was edited to the elimination of α-branch of xanthophyll biosynthesis in a knockout mutant of the zeaxanthin epoxidase gene (ZEP). The double knockout mutant (dzl) had a 60% higher zeaxanthin yield (5.24 mg L

conclusionsA Chlamydomonas strain with the elimination of lutein production by gene editing using CRISPR-Cas9 has been successfully developed. This research presents a solution to overcome the difficulties of the downstream-process for the production of high-purity zeaxanthin.

Indexed as

Algal ProteinsBiosynthetic PathwaysChlamydomonas reinhardtiiCRISPR-Cas SystemsGene Knockout TechniquesIndustrial MicrobiologyIntramolecular LyasesMetabolic EngineeringOxidoreductasesZeaxanthinsAlgal ProteinsIntramolecular Lyaseslycopene cyclase-isomeraseOxidoreductaseszeaxanthin epoxidaseZeaxanthinsChlamydomonas reinhardtiiCRISPR-Cas9Lycopene epsilon cyclaseRetinal pigmentZeaxanthin production

Identifiers

PMID33256757
PMCPMC7708255
OpenAlexW3109944229

What OpenQuestion holds

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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.