Table 2 Description of Protein Blocks in short loops. The analysis is carried out in the short loops regions, i.e. 2 to 6 residues between two successive mm and/or dd. Listed for each protein block (PB; labeled from a to p), are: the frequency of occurrence (frq) in the complete databank (DB), the loops databank (Loops), and the short loops databank (Short loops), the four main PB transitions and the distribution in the secondary structures (α-helix, coil and β-strand) of the central residue, as assigned by PSEA.

DB (%)

Loops (%)

Short loops (%)

1st

2nd

3rd

4th

α (%)

coil (%)

β (%)

a

3.9

7.9

8.2

71.8

(c)

17.9

(d)

6.6

(k)

0.0

70.7

29.3

b

4.4

9.0

3.7

40.7

(c)

25.7

(f)

15.7

(l)

0.4

95.8

3.8

c

8.1

7.5

16.3

82.3

(d)

12.9

(f)

0.0

55.6

44.4

d

18.9

--

--

e

2.5

5.1

4.9

90.1

(h)

0.0

36.4

63.6

f

6.7

13.6

11.8

85.2

(k)

13.4

(b)

0.0

75.3

24.7

g

1.1

2.2

1.8

39.7

(c)

30.2

(h)

14,0

(o)

13.7

(f)

13.8

82.7

3.5

h

2.4

4.9

4.3

65,0

(i)

21.9

(j)

7.3

(k)

1.3

75.4

23.3

i

1.9

3.9

3.1

84.4

(a)

9.2

(l)

0.9

93.7

5.4

j

0.8

1.6

1.4

25,0

(l)

20.5

(b)

18.0

(a)

14,0

(k)

11.7

79.5

8.8

k

5.4

11.0

12.9

81.2

(l)

7.6

(o)

6.5

(b)

61.5

38.0

0.5

l

5.4

11.0

12.1

83.9

(m)

5.3

(c)

74.1

25.7

0.2

m

30.2

--

--

n

2.0

4.1

5.1

95.6

(o)

87.2

11.9

0.9

o

2.8

5.7

6.6

83.3

(p)

8.2

(m)

63.8

36,0

0.2

p

3.5

7.1

7.8

64.6

(a)

23.6

(c)

6.1

(m)

13.5

83,0

3.5