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Table 1 Preferred and avoided amino acids from proteomes of 10 hyperthermophiles (HT) and thermophiles (T), and 18 mesophiles (M)

From: Preferred codons and amino acid couples in hyperthermophiles

   

HT and T

M

 
   

Prokarya

Prokarya

Eukarya

 

Amino acids

Secondary structures

Polar requirement*

Average (range)

Average (range)

 

Ratio (HT, T)/M

Gln (Q)

α-helix

8.60

1.88 (1.44-2.08)

4.19(3.25-5.5)

4.28 (3.97-5.24)

0.44

His (H)

α-helix

8.40

1.53 (1.43-1.9)

2.29 (1.83-2.74)

2.4(2.15-2.68)

0.65

Ala (A)

α-helix

7.00

6.38 (5.44-7.84)

9.83 (6-13)

7.64(6.19-11.1)

0.73

Cys (C)

β-strand

4.8

0.81 (0.56-1.27)

1.09 (0.67-1.91)

1.84(1.27-2.21)

0.62

Glu (E)

α-helix

12.50

8.11 (5.53-9.6)

5.8(4.4-7.08)

6.6 (6.39-6.99)

1.34

Lys (K)

α-helix

10.10

7.5 (4.5-10.4)

4.56 (2.61-10)

6.28 (5.6-7.29)

1.49

Tyr (Y)

β-strand

5.40

4.08 (3.2-4.82)

2.74 (1.9-3.48)

3.01 (2.76-3.35)

1.45

Ile (I)

β-strand

4.90

8.42 (7.18-10.5)

5.5(3.28-8.64)

5.46 (4.43-6.51)

1.52

  1. *Taken from 14; Taken from 16; data on HT. T. M in %; only ratios >1.3 and <0.8 are shown.