Contacts of the helix formed by residues 66 - 74 (chain B) in PDB entry 5IXG
Residue contacts within the protein are
derived with the CSU software (Sobolev V., Sorokine A.,
Prilusky J., Abola E.E. and Edelman M. (1999) Automated
analysis of interatomic contacts in proteins.
Bioinformatics, 15, 327-332). A
short description of the analytical approach
is given at the end of the page.
Note:
Non-standard 3 letter residue
codes indicate a heterogroup. To identify
and analyse, use LPC software
Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC - hydrophobic-hydrophilic contact (destabilizing contact)
+/- - indicates presence/absence of a specific contacts
* - indicates residues forming contacts by their side chain
(including CA atoms)
Residues in contact with SER 66 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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14A SER* 5.1 6.6 - - - -
17A TYR* 3.8 12.1 - - - -
31B TRP* 4.2 8.3 - - - -
64B THR* 3.1 13.0 + - - -
65B GLY* 1.3 77.0 - - - +
67B ALA* 1.3 64.4 + - - +
68B LYS* 3.6 7.6 + - - +
69B LEU* 3.2 22.4 + - - +
70B ASP* 2.9 24.0 + - - +
201B OTP 5.5 1.1 + - - -
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Residues in contact with ALA 67 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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65B GLY 4.1 2.2 + - - -
66B SER* 1.3 72.5 + - - +
68B LYS* 1.3 64.9 + - + +
70B ASP* 3.4 12.6 + - - +
71B GLU* 3.1 24.9 + - - +
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Residues in contact with LYS 68 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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66B SER* 3.1 6.6 + - - +
67B ALA* 1.3 79.6 - - + +
69B LEU* 1.3 64.3 + - - +
71B GLU* 3.4 20.7 + - - +
72B HIS* 3.1 22.9 + - - +
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Residues in contact with LEU 69 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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31B TRP* 3.6 41.3 - - + +
64B THR* 3.8 19.1 - - + +
66B SER* 3.1 20.5 + - - +
68B LYS* 1.3 71.5 - - - +
70B ASP* 1.3 67.9 + - - +
72B HIS* 3.1 10.6 + - + +
73B LEU* 2.8 53.3 + - + +
201B OTP 3.7 46.2 - - + +
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Residues in contact with ASP 70 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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62B ILE* 3.4 32.5 - - + +
63B HIS* 3.7 15.6 + - - -
64B THR* 2.8 39.2 + - - +
66B SER 2.9 17.3 + - - +
67B ALA* 3.6 13.5 - - - +
69B LEU* 1.3 78.0 - - - +
71B GLU* 1.4 60.8 + - - +
73B LEU* 3.5 6.9 + - - +
74B GLN* 3.3 26.0 + - - +
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Residues in contact with GLU 71 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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67B ALA 3.1 15.5 + - - +
68B LYS* 3.9 26.2 + - - +
69B LEU 3.2 0.2 - - - -
70B ASP* 1.4 73.4 - - - +
72B HIS* 1.3 66.9 + - - +
74B GLN* 3.1 25.1 + - + +
75B THR* 3.8 7.2 - - - +
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Residues in contact with HIS 72 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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68B LYS 3.1 17.2 + - - +
69B LEU* 3.1 15.0 + - + +
71B GLU* 1.3 79.5 - - - +
73B LEU* 1.3 75.1 + - + +
75B THR* 2.8 36.5 + - - +
77B GLU* 3.8 34.6 - - + +
78B PHE* 4.8 2.8 - - + +
153B TYR* 3.7 27.5 + + - -
201B OTP 4.6 8.5 - - + -
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Residues in contact with LEU 73 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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62B ILE* 4.0 24.2 - - + -
64B THR* 4.2 4.5 - - + -
69B LEU* 2.8 47.8 + - + +
70B ASP* 3.9 6.3 - - - +
71B GLU 3.3 0.4 - - - -
72B HIS* 1.3 80.2 - - + +
74B GLN* 1.3 59.0 + - - +
75B THR 3.2 0.4 - - - -
78B PHE* 3.7 29.4 - - + -
79B PHE* 2.9 47.2 + - + -
201B OTP 3.9 39.7 - - + -
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Residues in contact with GLN 74 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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59B ILE* 3.2 24.8 + - - +
60B ALA* 3.3 27.4 + - - +
62B ILE* 3.5 13.1 - - - +
70B ASP 3.3 22.7 + - - +
71B GLU* 3.4 13.7 - - - +
72B HIS 3.1 1.2 - - - -
73B LEU* 1.3 78.4 - - - +
75B THR* 1.3 62.1 + - + +
79B PHE* 4.6 1.6 - - - -
80B ASP* 3.5 0.5 - - - +
81B ALA* 3.0 52.2 + - + +
82B ALA 4.4 2.1 + - - -
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A short description of the
analytical approach
The contact analysis used in this page
is based upon the approach
developed in:
Sobolev V., Wade R.C., Vriend G.
and Edelman M. PROTEINS (1996)
25, 120-129.
Contact legitimacy depends on the hydrophobic-hydrophilic
properties of the contacting atoms. In order to
define it, for each inter-atomic contact,
eight atom classes have been introduced:
I Hydrophilic - N and O that can donate and accept hydrogen bonds
(e.g., oxygen of hydroxyl group of Ser. or Thr)
II Acceptor - N or O that can only accept a hydrogen bond
III Donor - N that can only donate a hydrogen bond
IV Hydrophobic - Cl, Br, I and all C atoms that are not in
aromatic rings and do not have a covalent bond to
a N or O atom
V Aromatic - C in aromatic rings irrespective of any other
bonds formed by the atom
VI Neutral - C atoms that have a covalent bond to at least one
atom of class I or two or more atoms from class II
or III; atoms; S, F, P, and metal atoms in all cases
VII Neutral-donor - C atoms that have a covalent bond with only one
atom of class III
VIII Neutral-acceptor - C atoms that have a covalent bond with only
one atom of class II
For each pair of contacts the state of legitimacy
is shown below:
Legend:
+, legitimate
-, illegitimate
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Atomic class I II III IV V VI VII VIII
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I (Hydrophilic) + + + - + + + +
II (Acceptor) + - + - + + + -
III (Donor) + + - - + + - +
IV (Hydrophobic) - - - + + + + +
V (Aromatic) + + + + + + + +
VI (Neutral) + + + + + + + +
VII (Neutral-donor) + + - + + + - +
VIII (Neutral-acceptor) + - + + + + + -
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Warning!
Atom classes for heterogroups are automatically
assigned based on the atomic coordinates. However, in
three cases (see below) the automatic assignment
is currently ambiguous. In these
cases, the user is advised to manually analyse
the full list of contacts using
LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are
considered "aromatic" (Class V) if the ring is approximately
planar, and "hydrophobic" (Class IV) or "neutral" (Classes
VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
"hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
"carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).
Please E-mail any
questions and/or suggestions concerning this page to
Vladimir.Sobolev@weizmann.ac.il