Skip to main content

Table 4 Mutagenesis

From: Secondary structural entropy in RNA switch (Riboswitch) identification

Wild-type

Riboswitch (Length)

Organism

 

Sensitivity %

Specificity %

 

ID49

TPP (158)

B. subtilis

 

56.9

51.8

 

Mutants [26]

Function

Disruption of only one structure

ΔRND %

ΔBJK %

ΔBJKbp %

ΔSil %

+30

Disrupts anti-antiterminator

Yes

0.7

-2.6

-3.9

-55.2

+118

Disrupts anti-terminator

Yes

-0.4

5.3

-0.7

-50.3

+80

Disrupts thi-box

No

0.8

3.3

0.8

-38.2

+97

Disrupts thi-box

No

-0.8

1.9

1.6

-63.2

Wild-type

Riboswitch (Length)

Organism

 

Sensitivity %

Specificity %

 

ID13

FMN (236)

B. subtilis

 

81.8 [1]

64.3

 

Mutants [26]

Function

Disruption of only one structure

ΔRND %

ΔBJK %

ΔBJKbp %

ΔSil %

G34C/G35C

Disrupts anti-terminator

Yes

-1.6

-5.5

-2.4

15.4

C86T

Disrupts rfn-box

No

0.2

-0.1

0.6

11.8

C49T

Disrupts rfn-box

No

0.3

0.5

0

-14.3

G157A/G160A

Disrupts anti-antiterminator

Yes

0

-0.7

-0.9

66.7

Wild-type

Riboswitch (Length)

Organism

 

Sensitivity %

Specificity %

 

ID36.1 [2]

SAM-I (159)

B. subtilis

 

94

88.7

 

Mutants [134]

Function

Disruption of only one structure

ΔRND %

ΔBJK %

ΔBJKbp %

ΔSil %

Ma

Disturbs both structures

No

2.3

15.8

10.7

-48.8

Mab

Disrupts anti-terminator

Yes

-2.3

-0.29

-0.4

4.1

Mc

Disrupts anti-terminator

Yes

0.3

-0.31

-0.8

-0.3

Mabc

Compensates mutations to wild type

No

-1.1

-0.32

-0.7

-3.2

Wild-type

Riboswitch (Length)

Organism

Reference

Sensitivity %

Specificity %

 

ID18

Magnesium (172)

Salmonella enterica

 

64.5 [3]

43.5

 

Mutant [20]

Function

Disruption of only one structure

ΔRND %

ΔBJK %

ΔBJKbp %

ΔSil %

C145G

Favors high Mg2+ conformation

Yes

1.7

-1.8

-4.7

-10.1

Mutants [20]

Function

Disruption of only one structure

ΔRND %

ΔBJK %

ΔBJKbp %

ΔSil %

M1

Favors +FMN conformation

Yes

0.4

-3.8

-5.8

-43

M2

Favors -FMN conformation

Yes

-1.4

-1.9

-1.2

-5.7

Wild-type

Riboswitch (Length)

Organism

 

Sensitivity %

Specificity %

 

ID20

Magnesium (204)

B. subtilis

 

78

65

 

Mutants [19]

Function

Disruption of only one structure

ΔRND %

ΔBJK %

ΔBJKbp %

ΔSil %

M5

Disrupts termination

Yes

2.7

0.9

0.7

-12.3

M6

Distrupts anti-terminator

Yes

3.9

12.4

8

-14.8

Wild-type

Riboswitch (Length)

Organism

 

Sensitivity %

Specificity %

 

ID33

ROSE-P2 (135)

Bradyrhizobium

 

22.7 [4]

22.2

 

Mutant [22]

Function

Disruption of only one structure

ΔRND %

ΔBJK %

ΔBJKbp %

ΔSil %

ΔG83[5]

Deletion of a critical nucleotide

Yes

-2.6

-8.1

-4.7

8.6

  1. Percentage of change in entropy values of mutants compared to wild type. Mutation names are according to the literature. Type of disruption to wild type activity/conformation is denoted in column function (please see references for more detail on mutation information). Mutants have same length as the wild type, except for the ROSE-P2 thermosensor. Wild-type segments are the same as gathered data, except for the SAM-I riboswitch where a homologue has been used. ΔRND% and ΔBJK%, refer to structural entropy values for the RND and BJK models, respectively. ΔBJKbp% refers to the base-pairing entropy of the BJK model as defined by [54]. ΔSil% refers to the two-cluster average silhouette index of the energy landscape of the RNA as calculated by [46]. Sensitivity% and specificity% refer to BJK model accuracy to the secondary structural conformation, with disregard to pseudoknots.
  2. [1]Table 4: Two out of the 55 base-pairings of the B. subtilis FMN sequence are G-A pairs.
  3. [2]Table 4: ID36.1 is the metI SAM-I riboswitch in B. subtilis and has sequence identity of 76% with ID36 yitJ B. subtilis SAM-I riboswitch using BLASTâ’¸. Sequence location on Location on the B. subtilis str. 168 strain embAL009126.3 (1258304-1258462), forward strand.
  4. [3]Table 4: CYK structural prediction under the BJK model and that of the MFE model via viennaâ’¸detect different alteration of the Magnesium riboswitch in Salmonella enterica serovar Typhimurium. Structural distance of the MFE prediction to the high Mg2+ and low Mg2+ structures are 28 and 120, respectively while they are 114 and 74, under CYK-based structural prediction of the BJK model. Sensitivity and specificity values for the BJK model prediction of the low Mg2+ conformation are 22% and 22%.
  5. [4]Table 4: One out of the 44 base-pairings of the Bradyrhizobium ROSE-P2 sequence is a G-G pair.
  6. [5]Table 4: The ΔG83 mutant is one nucleotide shorter than the ROSE-P2 135nt-long wild type.