Table 1 Thermodynamic parameters of duplex formation with s6G.

From: Thermodynamic and structural contributions of the 6-thioguanosine residue to helical properties of RNA

 

Duplexes (5′-3′)b

Average of curve fits

TM−1 vs log CT plots

−ΔH°

(kcal/mol)

−ΔS° (eu)

−ΔG°37 (kcal/mol)

TMc

(°C)

−ΔH°

(kcal/mol)

−ΔS° (eu)

−ΔG°37

(kcal/mol)

TMc(°C)

ΔΔG°37

(kcal/mol)d

C1

CAGUCAGU

GUCAGUCA

71.0 ± 3.5

196.6 ± 11.0

10.04 ± 0.14

53.1

77.6 ± 4.0

217.1 ± 12.4

10.26 ± 0.15

52.7

C2

UCAGUCAG

AGUCAGUC

73.5 ± 5.0

204.5 ± 15.6

10.07 ± 0.22

52.7

71.2 ± 3.9

197.4 ± 12.3

9.96 ± 0.15

52.7

M1

GCAGUCAGU

   GUCAGUCA

74.3 ± 1.0

204.5 ± 3.0

10.89 ± 0.11

56.3

63.6 ± 1.6

171.6 ± 5.0

10.41 ± 0.07

57.1

0

M2

GCAGUCAGU

   GUCAGUCA

75.3 ± 11.5

207.5 ± 35.3

10.95 ± 0.57

56.3

74.4 ± 3.7

204.7 ± 11.4

10.96 ± 0.18

56.6

−0.55

M3

UCAGUCAGG

AGUCAGUC

72.0 ± 6.8

196.8 ± 20.9

10.99 ± 0.30

57.5

72.9 ± 3.8

199.5 ± 11.7

10.98 ± 0.19

57.2

0

M4

UCAGUCAGG

AGUCAGUC

87.5 ± 19.7

244.6 ± 60.4

11.61 ± 0.98

56.1

87.7 ± 11.6

245.1 ± 35.4

11.70 ± 0.66

56.4

−0.72

M5

GCAGUCAGU

CGUCAGUCA

83.3 ± 7.8

225.1 ± 23.0

13.48 ± 0.66

65.2

74.2 ± 2.5

198.2 ± 7.4

12.74 ± 0.19

65.3

0

M6

GCAGUCAGU

CGUCAGUCA

78.4 ± 1.0

213.6 ± 3.2

12.18 ± 0.09

61.1

69.6 ± 2.5

186.9 ± 7.6

11.67 ± 0.15

61.7

1.07

M7

UCAGUCAGG

AGUCAGUCC

76.8 ± 6.9

206.4 ± 20.8

12.79 ± 0.44

64.5

73.3 ± 2.4

195.8 ± 19.3

12.53 ± 0.47

64.7

0

M8

UCAGUCAGG

AGUCAGUCC

77.6 ± 2.7

211.3 ± 8.1

12.03 ± 0.23

60.7

67.8 ± 1.6

181.6 ± 5.0

11.44 ± 0.10

61.2

1.09

M9

UCAGGCAGU

AGUCCGUCA

80.2 ± 2.0

213.0 ± 5.9

13.93 ± 0.17

68.6

77.6 ± 0.7

206.0 ± 2.1

13.74 ± 0.06

68.7

0

M10

UCAGGCAGU

AGUCCGUCA

68.4 ± 2.1

184.5 ± 6.8

11.17 ± 0.09

59.6

66.9 ± 2.8

180.1 ± 8.6

11.10 ± 0.16

59.7

2.64

M11

UCACGGAGU

AGUGCCUCA

78.9 ± 8.7

210.4 ± 25.8

13.69 ± 0.75

67.9

75.7 ± 2.9

201.0 ± 8.6

13.37 ± 0.23

67.8

0

M12

UCACGGAGU

AGUGCCUCA

70.0 ± 8.8

189.7 ± 27.0

11.19 ± 0.44

59.1

63.9 ± 3.8

170.9 ± 11.7

10.89 ± 0.22

59.7

2.48

M13

UCAAGUAGU

AGUUCAUCA

75.6 ± 6.3

210.5 ± 19.7

10.34 ± 0.18

53.5

73.8 ± 3.6

204.8 ± 11.2

10.28 ± 0.15

53.6

0

M14

UCAAGUAGU

AGUUCAUCA

69.4 ± 2.0

195.8 ± 6.4

8.67 ± 0.07

46.9

62.4 ± 2.7

173.8 ± 8.4

8.53 ± 0.06

47.2

1.75

M15

UCAUGAAGU

AGUACUUCA

76.0 ± 9.6

212.6 ± 30.1

10.12 ± 0.27

52.3

78.6 ± 1.3

220.6 ± 4.0

10.19 ± 0.05

52.1

0

M16

UCAUGAAGU

AGUACUUCA

61.0 ± 3.8

172.3 ± 12.0

7.59 ± 0.11

42.5

62.2 ± 2.0

176.2 ± 6.3

7.61 ± 0.02

42.5

2.58

M17

UCAGGCAGU

AGUCGGUCA

77.3 ± 1.9

217.4 ± 5.8

9.92 ± 0.11

51.2

85.0 ± 2.5

240.9 ± 7.7

10.30 ± 0.12

51.4

0

M18

UCAGGCAGU

AGUCGGUCA

62.3 ± 2.5

175.7 ± 7.9

7.76 ± 0.10

43.2

62.1 ± 2.6

175.1 ± 8.4

7.74 ± 0.04

43.2

2.56

M19

UCAGGCAGU

AGUCUGUCA

83.5 ± 3.4

230.6 ± 10.4

12.03 ± 0.17

58.9

74.2 ± 1.4

202.0 ± 4.4

11.53 ± 0.08

59.4

0

M20

UCAGGCAGU

AGUCUGUCA

73.1 ± 2.4

204.9 ± 7.6

9.55 ± 0.07

50.4

73.8 ± 1.4

207.2 ± 4.5

9.56 ± 0.04

50.3

1.97

M21

UCAGGCAGU

AGUCAGUCA

68.7 ± 8.3

194.2 ± 26.5

8.49 ± 0.15

46.1

69.3 ± 3.7

196.3 ± 11.8

8.45 ± 0.08

45.9

0

M22

UCAGGCAGU

AGUCAGUCA

57.8 ± 2.1

164.8 ± 6.8

6.66 ± 0.06

37.7

58.5 ± 2.3

167.4 ± 7.4

6.63 ± 0.03

37.5

1.82

  1. asolutions: 1 M sodium chloride, 20 mM sodium cacodylate, 0.5 mM Na2EDTA, pH 7.0, bG – 6-thioguanosine, ccalculated for 10−4 M oligomer concentration, dbetween the duplexes of the same sequence containing G vs G.