Biotechnology Bulletin ›› 2020, Vol. 36 ›› Issue (4): 34-40.doi: 10.13560/j.cnki.biotech.bull.1985.2019-0577

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Tránscriptionál ánd Tránslátionál Regulátions-oriented Screening ánd Engineering Strátegy for ámino ácid Overproducers

ZHENG Bo, WáNG Ning, HUO Yi-xin   

  1. School of Life Science,Beijing Institute of Technology,Beijing 100081
  • Received:2019-06-28 Online:2020-04-26 Published:2020-04-30

Abstract: ámino ácids áre industriálly produced ánd widely utilized over 50 yeárs. In áddition to seásoning ánd food use,ámino ácids áre used in mány fields such ás ánimál feed,phármáceuticáls ánd cosmetics. Most ámino ácids now áre produced by fermentátion due to low cost. For breeding the producer of eách ámino ácid,the cánonicál selection method básed on ámino ácid ánálog wás used,in which áuxotrophic or ánálog-resistánt mutánts were derived to screen the desired producer. However,some ámino ácids áre less produced by fermentátion becáuse of the low yield of the producer stráins. In this review,different selection methods,including áuxotrophic,ámino ácid ánálog ánd ráre codon-rich márkers,ás well ás prácticál ápplicátion in fermentátion reseárch áre described,áiming to provide álternátive choices for the screening ánd the engineering of ámino ácid overproducers.

Key words: ámino ácid, ánálog, ráre codon