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Biotechnology Letters

, Volume 39, Issue 3, pp 439–446 | Cite as

Generation of lycopene-overproducing strains of the fungus Mucor circinelloides reveals important aspects of lycopene formation and accumulation

  • Yingtong Zhang
  • Haiqin ChenEmail author
  • Eusebio Navarro
  • Sergio López-García
  • Yong Q. Chen
  • Hao Zhang
  • Wei Chen
  • Victoriano GarreEmail author
Original Research Paper

Abstract

Objectives

To generate lycopene-overproducing strains of the fungus Mucor circinelloides with interest for industrial production and to gain insight into the catalytic mechanism of lycopene cyclase and regulatory process during lycopene overaccumulation.

Results

Three lycopene-overproducing mutants were generated by classic mutagenesis techniques from a β-carotene-overproducing strain. They carried distinct mutations in the carRP gene encoding lycopene cyclase that produced loss of enzymatic activity to different extents. In one mutant (MU616), the lycopene cyclase was completely destroyed, and a 43.8% (1.1 mg/g dry mass) increase in lycopene production was observed in comparison to that by the previously existing lycopene overproducer. In addition, feedback regulation of the end product was suggested in lycopene-overproducing strains.

Conclusions

A lycopene-overaccumulating strain of the fungus M. circinelloides was generated that could be an alternative for the industrial production of lycopene. Vital catalytic residues for lycopene cyclase activity and the potential mechanism of lycopene formation and accumulation were identified.

Keywords

CarRP Feedback regulation Lycopene Lycopene cyclas Mucor circinelloides 

Notes

Acknowledgements

We thank J. A. Madrid for technical assistance. This work was funded by the Fundación Séneca (Comunidad Autónoma de la Región de Murcia, Spain), Project No. 08802/PI/08, The Program for New Century Excellent Talents (NCET-13-0831), The Program for Changjiang Scholars and Innovative Research Team in University (IRT1249). This study is supported by program of Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province.

Supporting information

Supplementary Table 1—Primer sequences.

Supplementary material

10529_2016_2265_MOESM1_ESM.docx (13 kb)
Supplementary material 1 (DOCX 12 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Yingtong Zhang
    • 1
  • Haiqin Chen
    • 1
    Email author
  • Eusebio Navarro
    • 2
  • Sergio López-García
    • 2
  • Yong Q. Chen
    • 1
  • Hao Zhang
    • 1
  • Wei Chen
    • 1
    • 3
  • Victoriano Garre
    • 2
    Email author
  1. 1.State Key Laboratory of Food Science and Technology, School of Food Science and TechnologyJiangnan UniversityWuxiPeople’s Republic of China
  2. 2.Departamento de Genética y Microbiología (Unidad Asociada al IQFR-CSIC), Facultad de BiologíaUniversidad de MurciaMurciaSpain
  3. 3.Beijing Innovation Centre of Food Nutrition and Human HealthBeijing Technology and Business University (BTBU)BeijingPeople’s Republic of China

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