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Gene Review

psbA  -  photosystem II protein D1

Euglena gracilis

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High impact information on psbA

  • A detailed analysis of the structure and the frequency of the pre-mRNAs of the psbA gene showed that the four introns are neither spliced out in a strictly random way, nor in a 5'-3' or 3'-5' direction [1].
  • The nucleotide sequence of 3324 bp of Eco I, containing the psbA locus, has been determined [2].
  • This locus encodes a polypeptide of 345 amino acids which is co-linear with, and has 86% derived amino acid sequence homology to sequences derived from four higher plants chloroplast psbA loci [2].
  • The psbA gene is the coding locus for a polypeptide of 32 kilodaltons that is involved in electron transport through photosystem II [3].
  • The majority of known group II introns are from chloroplast genomes, yet the first self-splicing group II intron from a chloroplast gene was reported only recently, from the psbA gene of the euglenoid, Euglena myxocylindracea [4].

Biological context of psbA


Analytical, diagnostic and therapeutic context of psbA

  • The structure and the frequency of the pre-mRNAs of the psbA gene (the gene for the 32-kd protein of photosystem II), which is split by four introns in Euglena chloroplasts was analysed by electron microscopy [1].


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