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Table 3 Expectation and variance of important parameters related to particular structural motifs of RNA secondary structure

From: Random generation of RNA secondary structures according to native distributions

Parameter

Expected Value

Variance

 

Random

Native

Random

Native

numunp

848.179

839.956

98964.7

103426.

numbps

420.848

424.96

27785.3

31310.9

numurs

179.73

181.822

4959.96

5117.47

nume

1.

1.

0.

0.

numh

36.6983

36.4818

196.935

185.596

nums

321.18

324.26

16538.8

19343.4

numb

20.6061

20.5782

87.1894

50.3103

numi

26.1442

26.538

125.66

194.769

numm

16.2197

17.1018

57.8874

41.0261

numhel

99.6683

100.7

1549.24

1492.84

unpe

106.014

79.8382

4039.69

3897.61

unph

6.93534

6.93188

18.4264

77.464

unps

--

--

--

--

unpb

1.9948

1.99596

3.10283

6.87868

unpi

7.14617

7.08869

16.5725

31.1197

unpm

16.0122

16.2577

87.4906

195.497

unphel

--

--

--

--

bpse

9.41479

6.94105

29.1956

6.30949

bpsh

--

--

--

--

bpss

1.

1.

0.

0.

bpsb

1.

1.

0.

0.

bpsi

1.

1.

0.

0.

bpsm

2.68212

2.72734

1.12921

1.21643

bpshel

4.22249

4.22006

13.6266

5.52299

  1. Values are derived from a native sample (our biological database) and from a random sample, respectively. num x denotes the number of occurrences of motif x in one secondary structure and unp x (bps x ) denotes the number of accessible unpaired bases (base pairs) in one substructure of type x. unp, bps, urs denote unpaired bases, base pairs and unpaired regions, whereas e, h, s, b, i, m, hel denote exterior loop, hairpin loop, stacked pair, bulge loop, interior loop, multiloop and helix, respectively.