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Table 4 Distribution and characteristics of introns in Bryopsis plumosa and Tydemania expeditiones

From: The chloroplast genomes of Bryopsis plumosa and Tydemania expeditiones (Bryopsidales, Chlorophyta): compact genomes and genes of bacterial origin

Gene

B. plu

T. exp

Length ( B. plu / T. exp ) (bp)

Insertion positions a

AT content (excl. intronic ORF) ( B.plu / T.exp )

Intronic ORF

Class

atpA (intron 1)

+

-

239

489

69%

-

group I intron

atpA (intron 2)

+

-

728

753

70%

-

putative group II

atpF

+

+

481/373

108/108

82/77%

-

undetermined

ccsA

+

+

385/370

210/210

79/78%

-

undetermined

psaA

+

-

2244

1797

69%

RT, IM

group II

psbA

-

+

3227

576

67%

RT, IM

group II

psbB

+

-

1103

600

73%

LHE

group I

psbC

-

+

2491

1131

57%

RT, IM

group II

psbT

+

-

427

27

82%

-

undetermined

rpl5

+

-

389

171

77%

-

putative group II

rpl23

+

-

351

24

85%

-

undetermined

rps19

+

-

848

141

64%

-

putative group II

rrl (intron 1)

-

+

776

1917

73%

LHE

group I

rrl (intron 2)

-

+

801

1923

69%

LHE

group I

rrl (intron 3)

-

+

1049

1931

67%

LHE b

group I

rrl (intron 4)

+

+

1037/730

2598/2598

63/71%

LHE

group I

rrs (intron 1)

-

+

860

510

67%

LHE

group I

rrs (intron 2)

-

+

988

794

71%

LHE

group I

trnL(uaa)

+

+

205/152

35

73/65%

-

putative group I

ycf3

+

-

373

174

79%

-

putative group II

  1. aIntron insertion site positions correspond to the nucleotide immediately preceding the intron. Insertion sites in genes coding for proteins and the tRNA are given relative to the corresponding genes in Mesostigma viride cpDNA (GenBank NC_002186); insertion sites in the rRNA genes are given relative to the 16S and 23S rRNA genes of Escherichia coli (GenBank NC_004431).
  2. bContains two LAGLIDADG homing endonuclease domains.
  3. RT = reverse transcriptase, IM = intron maturase, LHE = LAGLIDADG homing endonuclease.