The exon context and distribution of Euascomycetes rRNA spliceosomal introns

Table 1 Chi-Square Test of Association of Spliceosomal and Group I Introns with Conserved rRNA Sites

	98–100%	90–97%	80–89%	<80%	Total	P-value
3Dom2O: SSU rRNA
sites	178	175	116	1073	1542	-
group I	11 [4.85]	5 [4.77]	5 [3.16]	21 [29.23]	42	0.0106*
spliceosomal	0 [3.00]	3 [2.95]	8 [1.96]	15 [18.09]	26	<0.0000*
3Dom2O: LSU rRNA
sites	150	203	168	2383	2904	-
group I	10 [2.12]	4 [2.82]	4 [2.37]	23 [33.64]	41	<0.0000*
spliceosomal	3 [1.29]	8 [1.75]	2 [1.45]	12 [20.51]	25	<0.0000*
3Dom: SSU rRNA
sites	355	156	80	951	1542	-
group I	17 [9.67]	3 [4.25]	1 [2.18]	21 [25.90]	42	0.0577
spliceosomal	4 [5.99]	9 [2.63]	2 [1.35]	11 [16.04]	26	0.0003*
3Dom: LSU rRNA
sites	595	349	283	1677	2904	-
group I	17 [8.40]	5 [4.93]	1 [4.00]	18 [23.68]	41	0.0059*
spliceosomal	10 [5.12]	3 [3.00]	1 [2.44]	11 [14.44]	25	0.0969

Column headings: Introns are positioned relative to SSU and LSU rRNA sites for positions with a nucleotide in more than 95% of the sequences that are 1) 98–100%, 2) 90–97%, 3) 80–89%, and 4) either <80% conserved or positions that are present in <95% of the sequences in genes from; 3Dom2O, the three phylogenetic domains and two organelles; 3O, the three phylogenetic domains. Sites are the number of rRNA positions followed by group I and spliceosomal introns in each conservation class and the number of observed and expected introns (in brackets [under a null model of random insertion]) is shown for each gene. The P-values for each analysis are also shown. Significant probability values are marked with an asterisk.

ISSN: 2730-7182