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Gene Review

chlB  -  light-independent protochlorophyllide...

Chlamydomonas reinhardtii

 
 
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Disease relevance of chlB

  • Polypeptides encoded by the chloroplast chlB genes also show significant sequence similarities with the bchB gene product of Rhodobacter capsulatus [1].
 

High impact information on chlB

  • Mutations in any one of the plastid (chlL, chlN, and chlB) or nuclear (y-1 to y-10) genes required for this process result in the phenotype of the yellow-in-the-dark or y mutants [2].
  • A chlB-like gene is absent in chloroplast genomes of tobacco and rice, consistent with the lack of light-independent chlorophyll synthesis in these plants [1].
  • Comparisons among the chloroplast chlB and the bacterial bchB gene products revealed five highly conserved sequence areas that are interspersed by four stretches of highly variable and probably insertional sequences [1].
  • Three unidentified open reading frames in chloroplast genomes of liverwort, black pine, and Chlamydomonas moewusii were also identified as chlB genes, based on their striking sequence similarities to the C. reinhardtii chlB gene [1].
 

Anatomical context of chlB

  • Analysis of the chlL, chlN, and chlB transcript levels in both light- and dark-grown wild-type and y mutant cells showed that the y mutations have no effect on the transcription of these plastid genes [2].
 

Other interactions of chlB

  • The chlB gene encodes a polypeptide of 688 amino acid residues, and is distinct from two previously characterized chloroplast genes (chlN and chlL) also required for light-independent chlorophyll accumulation in C. reinhardtii [1].

References

 
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