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The complete sequence of the Acacia ligulata chloroplast genome reveals a highly divergent clpP1 gene
PLoS One (2015)
  • Anna V Williams, The University of Western Australia
  • Laura M Boykin, The University of Western Australia
  • Kate Howell, The University of Notre Dame Australia
  • Paul G Nevill, The University of Western Australia
  • Ian Small, The University of Western Australia
Abstract
Legumes are a highly diverse angiosperm family that include many agriculturally important
species. To date, 21 complete chloroplast genomes have been sequenced from legume
crops confined to the Papilionoideae subfamily. Here we report the first chloroplast genome
from the Mimosoideae, Acacia ligulata, and compare it to the previously sequenced legume
genomes. The A. ligulata chloroplast genome is 158,724 bp in size, comprising inverted repeats
of 25,925 bp and single-copy regions of 88,576 bp and 18,298 bp. Acacia ligulata
lacks the inversion present in many of the Papilionoideae, but is not otherwise significantly
different in terms of gene and repeat content. The key feature is its highly divergent clpP1
gene, normally considered essential in chloroplast genomes. In A. ligulata, although transcribed
and spliced, it probably encodes a catalytically inactive protein. This study provides
a significant resource for further genetic research into Acacia and the Mimosoideae. The divergent
clpP1 gene suggests that Acacia will provide an interesting source of information
on the evolution and functional diversity of the chloroplast Clp protease complex.
Disciplines
Publication Date
2015
DOI
10.1371/journal.pone.0125768
Citation Information
Williams AV, Boykin LM, Howell KA, Nevill PG, Small I (2015) The complete sequence of the Acacia ligulata chloroplast genome reveals a highly divergent ClpP1 gene. PLoS One 10(5): e0125768