Table 9

Percentage similarity in nucleotide sequences between isoaccepting leucine tRNA genes (trnLUUR and trnLCUN) within the mt genomes of six vermetids, sixteen additional caenogastropods, and three other molluscs for comparison

Species

tRNA comparisonab

Percent similarityc


Dendropoma maximum

LUUR-LCUN

60.9%

Dendropoma gregarium

LUUR-LCUN

69.0%

Eualetes tulipa

LCUN-/-LUUR

98.4%

Thylacodes squamigerusd

LCUN-/-LUUR1

66.2%

LCUN-/-LUUR2

98.4%

LUUR1-LUUR2

67.6%

Vermetus erectus

LUUR-LCUN

76.6%

Thylaeodus sp.

LCUN-/-LUUR

87.0%

Oncomelania

LUUR-LCUN

91.2%

Littorina

LUUR-LCUN

80.3%

Calyptraea

LCUN-LUUR

58.0%

Cymatium

LCUN-LUUR

61.8%

Thais

LCUN-LUUR

58.0%

Rapana

LCUN-LUUR

Insufficient datae

Conus textile

LCUN-LUUR

60.9%

Conus borgesi

LCUN-LUUR

60.9%

Lophiotoma

LCUN-LUUR

62.3%

Ilyanassa

LCUN-LUUR

64.7%

Nassarius

LCUN-LUUR

64.7%

Bolinus

LCUN-LUUR

62.3%

Cancellaria

LCUN-LUUR

52.7%

Cymbium

LCUN-LUUR

58.2%

Fusiturris

LCUN-LUUR

66.7%

Terebra

LCUN-LUUR

59.4%

Haliotis rubra

LCUN-LUUR

64.2%

Katharina tunicata

LCUN-LUUR

48.5%

Octopus vulgaris

LCUN-LUUR

66.7%


a tRNA genes were aligned using Clustal X with subsequent adjustments made according to secondary structure.

b Leucine tRNAs are presented according to relative order and position: one dash indicates that the two tRNAs are adjacent to each other; two dashes separated by a backslash indicate that these two genes are separated by at least one other gene.

c Percent similarity reflects the number of nucleotide matches over the total length of the alignment, excluding the third base of the anticodon triplet.

d Because Thylacodes had two copies of trnLUUR, three pairwise comparisons between leucine tRNA genes were made for this species.

e Sequence contained ambiguous nucleotides.

Rawlings et al. BMC Genomics 2010 11:440   doi:10.1186/1471-2164-11-440

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