Partial recovery of light-independent chlorophyll biosynthesis in the chlL-deletion mutant of Synechocystis sp. PCC 6803

Q. Wu, Jiujiu Yu, N. Zhao

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A chlL-deletion mutant of Synechocystis sp. PCC 6803 designated as chlL- was unable to make significant amounts of chlorophyll in darkness. However, an apparent pseudorevertant has been generated spontaneously that can synthesize an increased amount of chlorophyll under light-activated heterotrophic growth conditions. Under these conditions, the chlorophyll content in this pseudorevertant was about 20% of that in the wild-type strain and about 4 times more than that in the original and in the recently recreated chlL-deletion mutant. This is paralleled by increased performance of dark-grown cells in terms of chlorophyll fluorescence induction and oxygen evolution rates in the pseudorevertant versus in the original mutant. PCR analysis confirmed that the chlL-pseudorevertant mutant still lacked the chlL gene. These results imply that the light-independent chlorophyll biosynthesis pathway was partly recovered.

Original languageEnglish (US)
Pages (from-to)289-293
Number of pages5
JournalIUBMB Life
Volume51
Issue number5
DOIs
StatePublished - Nov 9 2001

Fingerprint

Synechocystis
Biosynthesis
Chlorophyll
Light
Recovery
Heterotrophic Processes
Darkness
Genes
Fluorescence
Oxygen
Polymerase Chain Reaction

Keywords

  • Chlorophyll biosynthesis
  • Cyanobacterium
  • Light-independent protochlorophyllide reductase
  • chlL gene

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Genetics
  • Clinical Biochemistry
  • Cell Biology

Cite this

Partial recovery of light-independent chlorophyll biosynthesis in the chlL-deletion mutant of Synechocystis sp. PCC 6803. / Wu, Q.; Yu, Jiujiu; Zhao, N.

In: IUBMB Life, Vol. 51, No. 5, 09.11.2001, p. 289-293.

Research output: Contribution to journalArticle

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