Задание 4. Определение параметров структур НК с помощью 3DNA.

Упражнение 1. Торсионные углы.


Сравнение значений торсионных углов.


Таблица по результатам измерений:

α (P - O5') β (O5' - C5') γ (C5' - C4') δ (C4' - C3') ε (C3' - O3') ξ (O3' - P) χ (C1' - N)
A-форма -51.67 174.79 41.73 79.11 -147.75 -75.15 -157.18
B-форма -29.89 136.32 31.17 143.34 -140.77 -160.50 -97.97

Значения торсионных углов из презентации:
α (P - O5') β (O5' - C5') γ (C5' - C4') δ (C4' - C3') ε (C3' - O3') ξ (O3' - P) χ (C1' - N)
A-форма -62 173 52 88 или 3 178 -50 -160
B-форма -63 171 54 123 или 131 155 -90 -117

A-форма.

Средние значения по анализу find_pair и analyze:

α (P - O5') β (O5' - C5') γ (C5' - C4') δ (C4' - C3') ε (C3' - O3') ξ (O3' - P) χ (C1' - N)
A-форма -51.70 174.80 41.70 79.08 -147.7 -75.0 -157.2

Main chain and chi torsion angles: 

Note: alpha:   O3'(i-1)-P-O5'-C5'
      beta:    P-O5'-C5'-C4'
      gamma:   O5'-C5'-C4'-C3'
      delta:   C5'-C4'-C3'-O3'
      epsilon: C4'-C3'-O3'-P(i+1)
      zeta:    C3'-O3'-P(i+1)-O5'(i+1)

      chi for pyrimidines(Y): O4'-C1'-N1-C2
          chi for purines(R): O4'-C1'-N9-C4

Strand I
  base    alpha    beta   gamma   delta  epsilon   zeta    chi
   1 G     ---    174.8    41.7    79.0  -147.8   -75.1  -157.2
   2 A    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
   3 T    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
   4 C    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
   5 G    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
   6 A    -51.7   174.8    41.7    79.0  -147.8   -75.1  -157.2
   7 T    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
   8 C    -51.7   174.8    41.7    79.0  -147.8   -75.0  -157.2
   9 G    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  10 A    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  11 T    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  12 C    -51.7   174.8    41.7    79.1  -147.7   -75.1  -157.2
  13 G    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  14 A    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  15 T    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  16 C    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  17 G    -51.7   174.8    41.7    79.0  -147.8   -75.1  -157.2
  18 A    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  19 T    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  20 C    -51.7   174.8    41.7    79.1    ---     ---   -157.2

Strand II
  base    alpha    beta   gamma   delta  epsilon   zeta    chi
   1 C    -51.7   174.8    41.7    79.0    ---     ---   -157.2
   2 T    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
   3 A    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
   4 G    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
   5 C    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
   6 T    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
   7 A    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
   8 G    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
   9 C    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  10 T    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  11 A    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  12 G    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  13 C    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  14 T    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  15 A    -51.7   174.8    41.7    79.0  -147.8   -75.1  -157.2
  16 G    -51.7   174.8    41.7    79.1  -147.7   -75.1  -157.2
  17 C    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  18 T    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  19 A    -51.7   174.8    41.7    79.1  -147.8   -75.1  -157.2
  20 G     ---    174.8    41.7    79.1  -147.8   -75.1  -157.2


B-форма.

Средние значения по анализу find_pair и analyze:

α (P - O5') β (O5' - C5') γ (C5' - C4') δ (C4' - C3') ε (C3' - O3') ξ (O3' - P) χ (C1' - N)
B-форма -29.9 136.3 31.2 143.3 -140.8 -160.5 -98

Strand I
  base    alpha    beta   gamma   delta  epsilon   zeta    chi
   1 G     ---    136.4    31.1   143.4  -140.8  -160.5   -98.0
   2 A    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
   3 T    -29.9   136.3    31.1   143.3  -140.8  -160.5   -97.9
   4 C    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
   5 G    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
   6 A    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
   7 T    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
   8 C    -29.9   136.3    31.1   143.3  -140.8  -160.5   -97.9
   9 G    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
  10 A    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
  11 T    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
  12 C    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
  13 G    -29.9   136.3    31.1   143.3  -140.8  -160.5   -98.0
  14 A    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
  15 T    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
  16 C    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
  17 G    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
  18 A    -29.9   136.3    31.1   143.3  -140.8  -160.5   -98.0
  19 T    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
  20 C    -29.9   136.3    31.2   143.3    ---     ---    -98.0

Strand II
  base    alpha    beta   gamma   delta  epsilon   zeta    chi
   1 C    -29.9   136.4    31.1   143.4    ---     ---    -98.0
   2 T    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
   3 A    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
   4 G    -29.9   136.3    31.1   143.3  -140.8  -160.5   -98.0
   5 C    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
   6 T    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
   7 A    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
   8 G    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
   9 C    -29.9   136.3    31.1   143.3  -140.8  -160.5   -97.9
  10 T    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
  11 A    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
  12 G    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
  13 C    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
  14 T    -29.9   136.3    31.1   143.3  -140.8  -160.5   -97.9
  15 A    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
  16 G    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
  17 C    -29.9   136.3    31.2   143.3  -140.8  -160.5   -98.0
  18 T    -29.9   136.4    31.1   143.4  -140.8  -160.5   -98.0
  19 A    -29.9   136.3    31.1   143.3  -140.8  -160.5   -98.0
  20 G     ---    136.3    31.2   143.3  -140.8  -160.5   -98.0

Z-форма.

Средние значения по анализу find_pair и analyze:
α (P - O5') β (O5' - C5') γ (C5' - C4') δ (C4' - C3') ε (C3' - O3') ξ (O3' - P) χ (C1' - N)
Z-форма -139.5 или 52 -136.7 или 179 -173.8 или 50.9 94.9 или 137.6 -100.4 -64.8 или 82 -154.7 или 58.7

Strand I
  base    alpha    beta   gamma   delta  epsilon   zeta    chi
   1 G     ---    179.0  -173.8    94.9  -103.6   -64.8    58.7
   2 C   -139.5  -136.7    50.9   137.6   -96.5    81.9  -154.3
   3 G     52.0   179.0  -173.8    94.9  -103.6   -64.8    58.7
   4 C   -139.5  -136.8    50.8   137.6   -96.5    82.0  -154.3
   5 G     51.9   179.0  -173.8    94.9  -103.6   -64.8    58.7
   6 C   -139.5  -136.8    50.9   137.6   -96.5    82.0  -154.3
   7 G     51.9   179.0  -173.8    94.9  -103.6   -64.8    58.7
   8 C   -139.5  -136.7    50.9   137.6   -96.5    81.9  -154.3
   9 G     52.0   179.0  -173.8    94.9  -103.6   -64.8    58.7
  10 C   -139.5  -136.8    50.8   137.6    ---     ---   -154.3

Strand II
  base    alpha    beta   gamma   delta  epsilon   zeta    chi
   1 C   -139.5  -136.7    50.9   137.6    ---     ---   -154.3
   2 G     51.9   179.0  -173.8    94.9  -103.6   -64.8    58.7
   3 C   -139.5  -136.8    50.9   137.6   -96.5    82.0  -154.3
   4 G     51.9   179.0  -173.8    94.9  -103.6   -64.8    58.7
   5 C   -139.5  -136.8    50.8   137.6   -96.5    82.0  -154.3
   6 G     52.0   179.0  -173.8    94.9  -103.6   -64.8    58.7
   7 C   -139.5  -136.7    50.9   137.6   -96.5    81.9  -154.3
   8 G     51.9   179.0  -173.8    94.9  -103.6   -64.8    58.7
   9 C   -139.5  -136.8    50.9   137.6   -96.5    82.0  -154.3
  10 G     ---    179.0  -173.8    94.9  -103.6   -64.8    58.7



Вывод. Самые отклоняющиеся углы:
α (P - O5') β (O5' - C5') γ (C5' - C4') δ (C4' - C3') ε (C3' - O3') ξ (O3' - P) χ (C1' - N)
A-форма -51.70 174.80 41.70 79.08 -147.7 -75.0 -157.2
B-форма -29.9 136.3 31.2 143.3 -140.8 -160.5 -98
Z-форма -139.5 или 52 -136.7 или 179 -173.8 или 50.9 94.9 или 137.6 -100.4 -64.8 или 82 -154.7 или 58.7

Определение значения торсионных углов в заданной тРНК (1il2).

Средние значения по анализу find_pair и analyze:

α (P - O5') β (O5' - C5') γ (C5' - C4') δ (C4' - C3') ε (C3' - O3') ξ (O3' - P) χ (C1' - N)
1IL2 -55.4 56.4 47.8 87.46 -151.82 -71.27 -150.81

Strand I
  base    alpha    beta   gamma   delta  epsilon   zeta    chi
   1 U     ---    177.0    42.4    82.2  -145.7   -77.5  -173.0
   2 C    -56.3   167.0    55.1    83.8  -156.0   -76.5  -163.8
   3 C    -62.4   179.2    45.5    81.8  -153.6   -71.4  -159.6
   4 G    -62.9   174.7    50.0    79.7  -147.4   -73.0  -164.3
   5 U    -61.8   170.9    53.7    82.6  -147.0   -81.1  -172.2
   6 G    -65.5   164.4    59.9    81.9  -155.8   -76.2  -161.8
   7 A    -52.4   177.6    61.5   149.4    ---     ---   -126.3
   8 c     ---    133.4    29.7    79.3  -153.1   -81.2  -169.0
   9 G    -75.8  -176.1    51.4    84.2  -159.4   -69.5  -163.0
  10 G    -65.0  -175.9    46.2    81.5  -153.4   -67.0  -159.4
  11 G    -62.2   164.6    57.1    78.9  -155.5   -68.8  -170.3
  12 G    -57.3   175.9    54.6    81.8  -155.8   -65.5  -165.0
  13 u    -69.0  -174.2    46.4    80.5  -139.4   -68.9  -151.9
  14 P    -53.9   169.3    50.4    87.5    ---     ---   -142.0
  15 C     ---    162.6  -176.4    83.0  -152.6   -55.8  -159.4
  16 G    -71.5  -174.1    47.7    81.8  -151.6   -69.0  -158.6
  17 U    -54.0   167.3    52.7    85.7  -153.5   -76.5  -161.6
  18 G    -84.1  -176.3    52.4    82.3  -161.3   -74.7  -161.6
  19 C    -73.1   175.0    58.6    82.6  -159.1   -66.8  -160.4
  20 C    -65.0  -174.0    50.3    82.7  -155.6   -72.3  -164.0
  21 A    -73.1   175.9    59.1    81.5    ---     ---   -163.8
  22 G     ---    167.0    51.0    84.9  -149.9   -61.6  -178.9
  23 U    -70.1   179.2    58.3    84.9  -146.4   -69.1  -165.9
  24 U    -78.1   174.2    53.9    83.2  -160.0   -46.0  -158.0
  25 P    -86.8   175.3    78.2    84.1    ---     ---   -133.8
  26 U     ---   -149.9    49.9    88.0    ---     ---   -171.6
  27 A     ---   -166.8    45.5    78.7  -148.2   -69.7  -161.2
  28 A    -54.2   174.7    47.9    83.0  -156.7   -77.9  -156.3
  29 u    -43.8   167.2    41.1    82.5    ---     ---   -141.8
  30 G     ---   -140.4    44.5   145.3    ---     ---    -59.2
  31 C     ---    167.8   118.4    84.5  -146.0   -64.3  -168.5
  32 C    -58.7  -175.7    36.2    80.5  -161.4   -68.8  -148.3
  33 G    -55.5   171.9    53.4    82.8  -145.1   -68.7  -168.6
  34 U    -61.0   164.6    51.6    81.8  -160.4   -73.8  -162.2
  35 G    -63.2   177.0    56.2    85.7  -161.8   -90.3  -162.4
  36 A    -46.0   159.4    60.7   140.3    ---     ---   -139.4
  37 c     ---    159.6    40.9    83.8  -151.7   -73.2  -175.4
  38 G    -78.7  -170.8    50.7    83.9  -160.0   -67.5  -166.2
  39 G    -72.2  -179.9    52.5    77.6  -153.4   -66.8  -165.5
  40 G    -56.7   169.3    57.1    80.6  -160.2   -68.6  -167.3
  41 G    -59.7   179.5    53.6    80.8  -153.7   -67.9  -165.5
  42 u    -65.8   179.6    51.7    82.6  -131.1   -71.0  -160.5
  43 P    -57.3   161.5    51.4    83.8    ---     ---   -150.6
  44 C     ---    166.0  -167.8    83.3  -135.1   -76.1  -159.3
  45 G    -50.0   160.7    48.5    82.9  -149.6   -63.3  -172.3
  46 U    -63.2  -176.3    48.6    84.1  -169.6   -73.2  -148.0
  47 G    -74.0  -169.5    46.8    82.9  -155.9   -75.1  -162.4
  48 C    -56.6   167.2    51.2    82.4  -156.9   -67.8  -163.3
  49 C    -67.2   179.9    51.0    82.9  -155.8   -71.5  -158.6
  50 A    -71.5   173.9    60.5    82.7    ---     ---   -167.6
  51 G     ---    165.2    49.7    85.4  -150.9   -64.5  -178.6
  52 U    -73.9  -173.4    57.8    89.4  -158.1   -63.7  -161.0
  53 U    -83.2   180.0    54.1    82.6  -155.4   -49.3  -152.7
  54 P    -82.6   168.7    84.7    82.9    ---     ---   -143.1
  55 U     ---   -155.6    50.7    82.3    ---     ---   -160.0
  56 A     ---   -168.7    45.6    81.8  -155.3   -64.8  -161.5
  57 A    -64.5   179.0    50.0    84.6  -136.7   -98.6  -151.0
  58 u    -60.9   142.6    60.4    85.3    ---     ---   -140.6
  59 G     ---   -137.9    68.4   150.9    ---     ---    -57.5

Strand II
  base    alpha    beta   gamma   delta  epsilon   zeta    chi
   1 A    -66.6  -171.1    50.1    82.4    ---     ---   -163.6
   2 G    -63.1   164.0    61.3    80.5  -160.9   -69.1  -167.5
   3 G    -64.3   178.1    47.1    81.9  -150.0   -72.4  -159.4
   4 C    -63.3   177.0    50.9    81.8  -152.6   -72.0  -157.5
   5 G    -59.9   179.0    49.2    79.5  -153.7   -66.3  -158.5
   6 C    -64.4   164.0    53.7    79.7  -157.0   -81.5  -161.4
   7 U    -64.0   180.0    50.6    82.1  -138.8   -79.8  -161.9
   8 G    -64.5   168.1    56.4    82.9  -151.2   -71.0  -169.7
   9 C    -62.3   166.0    57.2    81.5  -145.4   -74.9  -164.4
  10 C    -62.2   175.9    50.5    80.0  -148.0   -72.5  -163.8
  11 C    -65.0  -178.4    44.7    81.3  -159.9   -68.5  -153.0
  12 C     ---   -165.7    42.9    81.8  -150.1   -75.0  -168.0
  13 A     ---   -127.8    58.5   146.6    ---     ---    -75.6
  14 G     ---   -179.8   -55.8   140.9    ---     ---   -113.5
  15 P    -63.0   176.1    44.9    85.5    ---     ---   -151.5
  16 C    -45.6   157.9    41.5    78.6  -148.4   -64.2  -168.2
  17 G    150.7  -177.7  -174.5    86.5  -123.4   -82.0   177.1
  18 C    -58.1  -176.5    39.5    83.5  -176.1   -61.5  -149.0
  19 G    -59.4  -174.6    41.0    82.5  -150.7   -71.0  -162.0
  20 G    -72.5  -164.8    47.2    81.6  -154.6   -71.8  -168.9
  21 G    -69.4   175.8    54.3    79.8  -153.6   -63.6  -160.9
  22 U    -64.4   166.0    54.8    85.0  -157.6   -57.5  -164.9
  23 A    -59.4   162.7    50.8    82.0  -145.6   -71.3  -154.7
  24 A    -51.2   163.2    58.5    80.8  -147.4   -81.8  -158.5
  25 G     ---    155.3    46.3    80.3  -143.1   -79.7  -167.5
  26 A     ---    165.1    56.5    84.6    ---     ---   -128.7
  27 A     ---   -167.0    53.4    86.0    ---     ---   -151.0
  28 U     ---    126.9   167.5   142.5    ---     ---   -126.9
  29 U     ---   -150.3    65.6    87.8    ---     ---   -173.5
  30 C     ---    159.5    55.6    82.4    ---     ---   -179.0
  31 G    -58.9  -170.6    46.5    83.0    ---     ---   -144.6
  32 G    -62.0   176.3    49.5    82.8  -157.1   -63.1  -166.5
  33 C    -59.0   160.3    53.4    82.4  -149.2   -76.8  -168.3
  34 G    160.2  -178.7   176.6    82.8  -132.8   -80.5  -179.7
  35 C    -51.7   163.1    42.4    81.3  -174.7   -67.8  -156.2
  36 U    -40.6   161.4    42.0    83.3  -143.2   -78.7  -161.0
  37 G    -52.3   164.8    55.0    80.2  -147.3   -81.7  -168.1
  38 C    -51.3   171.9    45.1    77.2  -146.6   -73.8  -160.8
  39 C    -70.2  -173.3    51.4    81.1  -149.0   -75.2  -162.3
  40 C    -65.4   172.9    52.4    80.8  -154.9   -72.7  -169.0
  41 C     ---   -176.9    55.7    82.0  -145.0   -78.3  -167.6
  42 A     ---   -151.9    51.9   145.9    ---     ---    -86.0
  43 G     ---    148.2  -166.8    81.3    ---     ---   -162.9
  44 P    -56.3   175.6    43.5    87.8    ---     ---   -154.0
  45 C    -46.1   175.3    36.1    80.1  -149.3   -64.4  -159.4
  46 G    152.9  -168.6   178.0    83.9  -119.7   -75.4   167.6
  47 C    -53.4   178.7    40.2    83.9  -173.8   -77.0  -147.5
  48 G    -71.8  -169.4    50.6    82.8  -149.0   -71.3  -156.6
  49 G    -65.4  -168.3    45.1    81.2  -154.0   -74.0  -172.9
  50 G    -77.0  -178.1    55.7    82.4  -152.3   -63.7  -166.9
  51 U    -69.1   161.3    60.1    84.7  -156.6   -55.8  -161.9
  52 A    -68.4   173.7    53.1    84.9  -149.0   -73.5  -158.4
  53 A    -52.5   173.2    48.4    82.2  -155.4   -74.6  -159.0
  54 G     ---    145.5    48.0    82.2  -148.4   -79.0  -168.1
  55 A     ---    162.0    60.6    85.8    ---     ---   -128.2
  56 A     ---    133.3    31.4    83.6    ---     ---   -152.6
  57 U     ---    125.9   175.0   143.1    ---     ---   -126.7
  58 U     ---   -149.6    59.9    88.2    ---     ---   -165.1
  59 C     ---    164.0    53.8    83.6    ---     ---   -171.4


Вывод. Данная структура больше всего похожа на А-форму.


Определение торсионных углов в заданной структре ДНК (1odh).

Средние значения по анализу find_pair и analyze:

α (P - O5') β (O5' - C5') γ (C5' - C4') δ (C4' - C3') ε (C3' - O3') ξ (O3' - P) χ (C1' - N)
1ODH -25.99 30.19 26.57 141.93 -39.92 -100.23 -109.84

Strand I
  base    alpha    beta   gamma   delta  epsilon   zeta    chi
   1 C     ---     ---    -60.1   147.1   162.3   -85.8  -106.3
   2 G    158.4  -158.8   169.0   139.5  -155.5  -144.4  -122.7
   3 A    -40.4   165.2    37.1   147.1  -169.0  -110.8  -105.0
   4 T     35.9   179.0   -61.3   151.8  -171.0  -127.1   -96.7
   5 G     29.4   167.9   -46.6   155.1   165.4   -90.4  -103.1
   6 C    -50.7  -164.5    36.4   136.5  -156.4  -106.8  -110.5
   7 G    -60.0   163.7    40.5   148.1  -112.2   166.2   -96.3
   8 G    -59.5   142.0    37.5   135.6  -168.9   -87.9  -128.8
   9 G    -68.7   179.9    38.0   132.4   171.7  -117.0  -113.9
  10 T    -34.6  -171.4    35.0   141.1  -168.0  -108.4  -117.1
  11 G    -54.8   175.0    38.6   136.7  -177.4  -124.5  -112.3
  12 C     43.1   174.1   -51.2   151.9   167.1   -82.1  -109.1
  13 A    170.0   147.3   172.8   149.0    ---     ---   -144.1

Strand II
  base    alpha    beta   gamma   delta  epsilon   zeta    chi
   1 G    -61.4   151.9    42.0   143.1    ---     ---    -99.6
   2 C    -34.4   156.8    31.1   147.0  -132.6  -162.6   -96.8
   3 T    -39.5  -179.1    43.3   148.0  -162.1  -117.3  -107.2
   4 A    -56.6  -167.3    37.9   139.0   173.7  -118.1  -112.2
   5 C    -58.5  -162.0    40.0   139.7   175.4   -92.6  -112.5
   6 G    -26.7   150.9    44.9   140.2   175.2  -105.8  -117.1
   7 C    -85.0  -142.0    45.0   142.4  -179.7  -137.0  -106.2
   8 C    -40.9   156.6    28.1   133.0   164.0   -81.1  -120.1
   9 C    -38.5   168.2    29.6   132.9  -148.8  -153.5  -105.3
  10 A    -47.6   165.4    39.6   137.0  -169.1  -105.0  -112.9
  11 C    -66.1  -162.8    38.2   137.2  -165.8  -124.4  -106.6
  12 G     24.0  -172.7   -66.2   150.3   165.8   -74.4  -104.0
  13 T     ---     ---    172.6   150.1  -154.2  -126.6   -98.5

Вывод. Самое "деформированное" основание, на первый взгляд, второй аденин. Выделен цветом.

Упражнение 2. Структура водородных связей.



Определение номеров нуклеотидов, образующих стебли (stems) в тРНК.
Акцепторный стебель T-стебель Антикодоновый стебель D-стебель
901 - 972 949 - 965 938 - 932 910 - 925
907 - 966 953 - 961 944 - 926 913 - 922
Водородные связи из .out:

(----- for WC bp, + for isolated bp, x for helix change)

            Strand I                    Strand II          Helix
   1   (0.003) C:.901_:[..U]U-----A[..A]:.972_:C (0.005)     |
   2   (0.004) C:.902_:[..C]C-----G[..G]:.971_:C (0.009)     |
   3   (0.004) C:.903_:[..C]C-----G[..G]:.970_:C (0.011)     |
   4   (0.012) C:.904_:[..G]G-----C[..C]:.969_:C (0.004)     |
   5   (0.008) C:.905_:[..U]U-*---G[..G]:.968_:C (0.010)     |
   6   (0.006) C:.906_:[..G]G-----C[..C]:.967_:C (0.008)     |
   7   (0.006) C:.907_:[..A]Ax----U[..U]:.966_:C (0.004)     |
   8   (0.017) C:.949_:[5MC]c-----G[..G]:.965_:C (0.008)     |
   9   (0.005) C:.950_:[..G]G-----C[..C]:.964_:C (0.005)     |
  10   (0.006) C:.951_:[..G]G-----C[..C]:.963_:C (0.006)     |
  11   (0.012) C:.952_:[..G]G-----C[..C]:.962_:C (0.005)     |
  12   (0.009) C:.953_:[..G]G----xC[..C]:.961_:C (0.008)     |
  13   (0.012) C:.954_:[5MU]u-**-xA[..A]:.958_:C (0.007)     |
  14   (0.043) C:.955_:[PSU]Px**+xG[..G]:.917_:C (0.005)     x
  15   (0.005) C:.938_:[..C]C-*---P[PSU]:.932_:C (0.044)     |
  16   (0.006) C:.939_:[..G]G-----C[..C]:.931_:C (0.006)     |
  17   (0.003) C:.940_:[..U]U-*---G[..G]:.930_:C (0.009)     |
  18   (0.010) C:.941_:[..G]G-----C[..C]:.929_:C (0.004)     |
  19   (0.010) C:.942_:[..C]C-----G[..G]:.928_:C (0.004)     |
  20   (0.003) C:.943_:[..C]C-----G[..G]:.927_:C (0.005)     |
  21   (0.005) C:.944_:[..A]Ax*---G[..G]:.926_:C (0.005)     |
  22   (0.009) C:.910_:[..G]G-*---U[..U]:.925_:C (0.004)     |
  23   (0.003) C:.911_:[..U]U-----A[..A]:.924_:C (0.009)     |
  24   (0.007) C:.912_:[..U]U-----A[..A]:.923_:C (0.007)     |
  25   (0.044) C:.913_:[PSU]Px*--xG[..G]:.922_:C (0.005)     |
  26   (0.003) C:.908_:[..U]Ux**-xA[..A]:.946_:C (0.005)     |
  27   (0.003) C:.914_:[..A]A-*--xA[..A]:.921_:C (0.008)     |
  28   (0.004) C:.915_:[..A]A-**+xU[..U]:.948_:C (0.003)     |
  29   (0.115) C:.916_:[H2U]ux**+xU[..U]:.959_:C (0.006)     x
  30   (0.021) C:.918_:[..G]Gx---xC[..C]:.956_:C (0.007)     +

Упражнение 3. Стекинг-взаимодействия.



Площади перекрывания пар:

     step      i1-i2        i1-j2        j1-i2        j1-j2        sum
   1 UC/GA  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  2.52( 1.02)  2.52( 1.02)
   2 CC/GG  0.00( 0.00)  0.00( 0.00)  0.27( 0.00)  4.35( 3.12)  4.62( 3.12)
   3 CG/CG  0.07( 0.00)  0.00( 0.00)  4.34( 1.58)  0.00( 0.00)  4.41( 1.58)
   4 GU/GC  6.93( 4.29)  0.00( 0.00)  0.00( 0.00)  6.95( 3.82) 13.88( 8.11)
   5 UG/CG  0.04( 0.00)  0.00( 0.00)  4.43( 1.56)  0.00( 0.00)  4.47( 1.56)
   6 GA/UC  3.95( 2.44)  0.00( 0.00)  0.00( 0.00)  1.52( 0.32)  5.47( 2.76)
   7 Ac/GU  3.57( 0.85)  0.00( 0.00)  0.00( 0.00)  6.18( 3.23)  9.75( 4.09)
   8 cG/CG  0.00( 0.00)  0.00( 0.00)  3.86( 1.41)  0.39( 0.01)  4.24( 1.42)
   9 GG/CC  2.27( 0.85)  0.00( 0.00)  0.26( 0.00)  1.27( 0.37)  3.80( 1.22)
  10 GG/CC  5.13( 3.77)  0.00( 0.00)  0.11( 0.00)  0.38( 0.00)  5.62( 3.77)
  11 GG/CC  3.90( 2.52)  0.00( 0.00)  0.65( 0.00)  0.00( 0.00)  4.55( 2.52)
  12 Gu/AC  8.16( 3.29)  0.00( 0.00)  0.00( 0.00)  5.49( 2.41) 13.66( 5.70)
  13 uP/GA  5.69( 1.65)  0.00( 0.00)  0.00( 0.00)  6.67( 3.61) 12.36( 5.26)
  14 PC/PG  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)
  15 CG/CP  0.64( 0.30)  0.00( 0.00)  0.00( 0.00)  3.57( 1.51)  4.21( 1.81)
  16 GU/GC  7.38( 3.96)  0.00( 0.00)  0.00( 0.00)  7.11( 4.09) 14.49( 8.06)
  17 UG/CG  0.00( 0.00)  0.00( 0.00)  6.00( 3.08)  0.00( 0.00)  6.00( 3.08)
  18 GC/GC  5.84( 2.75)  0.00( 0.00)  0.00( 0.00)  5.42( 2.57) 11.26( 5.33)
  19 CC/GG  0.05( 0.00)  0.00( 0.00)  0.55( 0.00)  1.95( 0.55)  2.55( 0.55)
  20 CA/GG  0.38( 0.00)  0.00( 0.00)  1.45( 0.51)  1.18( 0.18)  3.01( 0.69)
  21 AG/UG  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  0.38( 0.14)  0.38( 0.14)
  22 GU/AU  6.73( 3.84)  0.00( 0.00)  0.00( 0.00)  5.58( 4.52) 12.31( 8.36)
  23 UU/AA  1.31( 0.02)  0.00( 0.00)  0.00( 0.00)  2.24( 1.93)  3.55( 1.96)
  24 UP/GA  1.76( 0.24)  0.00( 0.00)  0.00( 0.00)  3.67( 2.38)  5.43( 2.63)
  25 PU/AG  2.99( 0.73)  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  2.99( 0.73)
  26 UA/AA  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  3.31( 2.31)  3.31( 2.31)
  27 AA/UA  5.89( 3.47)  0.00( 0.00)  0.00( 0.00)  4.87( 2.39) 10.76( 5.86)
  28 Au/UU  5.28( 3.84)  0.00( 0.00)  0.00( 0.00)  4.70( 0.64)  9.98( 4.48)
  29 uG/CU  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)
  30 GC/GC  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)
  31 CC/GG  0.00( 0.00)  0.00( 0.00)  0.27( 0.00)  3.38( 2.02)  3.65( 2.02)
  32 CG/CG  0.00( 0.00)  0.00( 0.00)  4.91( 2.11)  0.00( 0.00)  4.91( 2.11)
  33 GU/GC  7.25( 4.31)  0.00( 0.00)  0.00( 0.00)  6.58( 3.48) 13.84( 7.79)
  34 UG/CG  0.00( 0.00)  0.00( 0.00)  5.98( 3.15)  0.00( 0.00)  5.98( 3.15)
  35 GA/UC  3.17( 1.29)  0.00( 0.00)  0.00( 0.00)  1.50( 0.18)  4.66( 1.47)
  36 Ac/GU  5.06( 1.54)  0.00( 0.00)  0.00( 0.00)  7.01( 4.34) 12.08( 5.88)
  37 cG/CG  0.00( 0.00)  0.00( 0.00)  4.39( 1.52)  0.14( 0.00)  4.53( 1.53)
  38 GG/CC  3.13( 1.64)  0.00( 0.00)  0.44( 0.00)  0.48( 0.07)  4.05( 1.71)
  39 GG/CC  4.49( 2.86)  0.00( 0.00)  0.53( 0.00)  0.00( 0.00)  5.02( 2.86)
  40 GG/CC  3.22( 1.74)  0.00( 0.00)  0.82( 0.00)  0.00( 0.00)  4.04( 1.74)
  41 Gu/AC  8.53( 3.99)  0.00( 0.00)  0.00( 0.00)  5.60( 2.62) 14.13( 6.61)
  42 uP/GA  6.11( 1.84)  0.00( 0.00)  0.00( 0.00)  7.23( 4.69) 13.34( 6.52)
  43 PC/PG  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)
  44 CG/CP  1.12( 0.64)  0.00( 0.00)  0.00( 0.00)  3.64( 1.58)  4.76( 2.22)
  45 GU/GC  6.81( 3.55)  0.00( 0.00)  0.00( 0.00)  5.82( 2.76) 12.63( 6.31)
  46 UG/CG  0.00( 0.00)  0.00( 0.00)  5.72( 2.85)  0.00( 0.00)  5.72( 2.85)
  47 GC/GC  6.67( 3.64)  0.00( 0.00)  0.00( 0.00)  7.00( 3.98) 13.67( 7.62)
  48 CC/GG  0.83( 0.04)  0.00( 0.00)  0.12( 0.00)  2.10( 0.67)  3.04( 0.71)
  49 CA/GG  0.42( 0.00)  0.00( 0.00)  1.33( 0.60)  1.21( 0.17)  2.95( 0.77)
  50 AG/UG  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  0.07( 0.01)  0.07( 0.01)
  51 GU/AU  6.65( 3.90)  0.00( 0.00)  0.00( 0.00)  5.12( 4.12) 11.77( 8.02)
  52 UU/AA  1.05( 0.01)  0.00( 0.00)  0.00( 0.00)  2.84( 2.43)  3.88( 2.44)
  53 UP/GA  1.86( 0.20)  0.00( 0.00)  0.00( 0.00)  2.99( 1.58)  4.85( 1.78)
  54 PU/AG  3.09( 0.55)  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  3.09( 0.55)
  55 UA/AA  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  4.02( 2.90)  4.02( 2.90)
  56 AA/UA  6.10( 3.99)  0.00( 0.00)  0.00( 0.00)  6.46( 3.76) 12.56( 7.75)
  57 Au/UU  4.65( 2.82)  0.00( 0.00)  0.00( 0.00)  2.76( 0.05)  7.41( 2.86)
  58 uG/CU  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)  0.00( 0.00)

Пары с наибольшей площадью перекрывания (выделены красным цветом в списке выше):


Соответствующая строка из файла stacking.pdb:

ATOM     16  N3    U C 901       0.291   3.315  -1.415  1.00 60.88           N

Изображение для пары с малой площадью перекрытия (выбранная обозначена синим в списке):


Соответствующая строка из файла stacking.pdb:

ATOM     19  C5    U C 901       2.120   4.814  -1.385  1.00 55.97           C

Взаимную ориентацию оснований также можно посмотреть в RasMol, вырезав основания, соседние к указанным в соответствующих строках stacking.pdb



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