Contacts of the helix formed by residues 81 - 86 (chain G) in PDB entry 1XFB
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 HIS 81 (chain G).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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79G PHE 3.9 2.2 + - - -
80G PHE* 1.3 82.6 - - + +
82G GLU* 1.3 70.8 + - - +
84G LEU* 2.9 20.0 + - - +
85G TYR* 3.3 34.8 - + - -
107G ILE* 4.1 13.9 - - + +
108G LYS 5.0 5.2 + - - +
138G TYR* 2.6 38.0 + + + +
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Residues in contact with GLU 82 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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37G VAL* 5.2 0.9 - - - +
53G GLU* 3.6 13.0 - - + +
56G ARG* 2.8 50.8 + - - +
60G ARG* 5.1 0.9 + - - -
80G PHE* 3.0 25.6 + - + -
81G HIS* 1.3 83.4 - - - +
83G THR* 1.3 64.2 + - - +
85G TYR* 2.9 25.1 + - - +
86G GLN* 3.5 39.1 + - + +
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Residues in contact with THR 83 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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33G ALA 5.3 1.1 - - - +
60G ARG* 3.3 32.8 + - + +
64G PHE* 3.6 23.8 - - + -
79G PHE* 3.5 21.3 - - + -
80G PHE* 2.8 22.5 + - - +
82G GLU* 1.3 74.3 + - - +
84G LEU* 1.3 57.2 + - - -
85G TYR 2.8 12.2 + - - -
86G GLN* 2.9 35.1 + - - +
94G PHE* 3.8 8.6 - - + +
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Residues in contact with LEU 84 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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79G PHE* 3.7 21.0 - - + -
80G PHE 3.1 7.5 + - - +
81G HIS* 2.9 14.4 + - - +
83G THR* 1.3 75.0 - - - +
85G TYR* 1.3 91.0 + - + +
86G GLN 3.6 1.2 - - - +
93G PRO* 6.1 0.3 - - - +
95G VAL* 3.2 39.8 - - + +
105G VAL* 3.9 21.1 - - + -
106G GLY 5.0 0.7 - - - +
107G ILE* 4.1 13.5 - - + -
138G TYR* 3.7 23.8 - - + +
141G ASP* 4.7 13.6 - - + +
143G ALA* 5.2 2.5 - - + -
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Residues in contact with TYR 85 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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81G HIS* 3.3 43.9 - + - -
82G GLU* 2.9 9.2 + - - +
83G THR 2.9 1.0 - - - -
84G LEU* 1.3 102.3 - - + +
86G GLN* 1.3 61.8 + - - +
87G LYS* 4.2 8.6 + - - +
93G PRO* 6.4 0.4 - - - -
137G GLN* 4.6 2.1 + - - +
138G TYR* 3.6 19.6 - - - -
141G ASP* 2.6 36.7 + - + -
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Residues in contact with GLN 86 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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53G GLU* 3.5 17.8 + - - +
57G ARG* 3.4 40.9 + - + +
60G ARG* 4.2 1.6 - - - +
82G GLU* 3.5 36.1 + - + +
83G THR* 2.9 31.0 + - - +
84G LEU 5.0 0.7 - - - +
85G TYR* 1.3 82.6 - - - +
87G LYS* 1.3 64.8 + - - +
93G PRO* 3.6 1.7 - - - +
94G PHE* 3.1 40.5 + - + +
95G VAL* 4.9 0.3 + - - +
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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