Contacts of the helix formed by residues 139 - 144 (chain O) in PDB entry 1NJI
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 TRP 139 (chain O).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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82O TYR* 3.9 19.5 - + - -
120O GLU* 4.3 14.2 + - - +
124O ASP* 5.4 0.2 - - - -
137O ALA 3.2 8.3 + - - -
138O ASP* 1.3 75.1 - - - +
140O GLN* 1.3 68.0 + - + +
141O ARG 3.3 1.1 - - - -
142O THR* 2.8 25.5 + - + -
143O ARG* 2.7 46.4 + - + +
172O PHE* 3.8 24.2 - + - -
173O ASP* 5.2 4.9 + - - -
176O ARG* 3.0 39.7 - - - -
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Residues in contact with GLN 140 (chain O).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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138O ASP* 2.5 31.1 + - - +
139O TRP* 1.3 84.2 - - + +
141O ARG* 1.3 61.4 + - - +
143O ARG* 3.1 43.2 + - - +
144O GLY 3.0 5.9 + - - -
145O ALA* 2.9 39.7 + - + +
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Residues in contact with ARG 141 (chain O).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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3035B C 2.8 39.3 + - - +
3036B C 3.3 43.3 + - - -
3048B C 2.8 43.8 + - - -
78O MET* 3.6 12.1 - - + +
112O GLY 4.2 8.4 + - - -
137O ALA* 4.1 20.4 - - + -
138O ASP* 3.9 17.5 + - - +
139O TRP 3.3 0.4 - - - -
140O GLN* 1.3 79.5 - - - +
142O THR* 1.3 62.3 + - - +
144O GLY* 3.0 9.4 + - - -
145O ALA* 4.3 1.3 - - - +
146O HIS* 3.1 49.0 - - + +
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Residues in contact with THR 142 (chain O).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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78O MET* 4.3 12.4 - - - +
79O PRO* 3.0 34.3 - - - +
82O TYR* 3.6 43.7 - - + -
117O ALA* 5.1 6.5 - - + +
120O GLU* 4.0 10.4 + - - +
137O ALA* 3.8 13.9 - - - +
139O TRP* 2.8 39.3 + - + -
141O ARG* 1.3 79.0 - - - +
143O ARG* 1.3 53.6 + - - +
172O PHE* 3.9 2.9 - - + -
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Residues in contact with ARG 143 (chain O).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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79O PRO* 3.2 8.9 - - - +
139O TRP* 2.7 26.1 + - + +
140O GLN* 3.1 52.6 + - - +
142O THR* 1.3 76.4 - - - +
144O GLY* 1.3 57.2 + - - +
168O LEU 4.9 0.3 - - - +
169O PRO* 3.4 44.0 + - + +
170O GLU* 3.7 14.8 + - - +
172O PHE* 3.4 32.1 - - + +
173O ASP* 2.4 46.2 + - - +
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Residues in contact with GLY 144 (chain O).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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79O PRO* 3.3 16.6 - - - -
141O ARG 3.0 12.6 + - - -
142O THR 3.0 0.2 - - - -
143O ARG* 1.3 80.7 - - - +
145O ALA* 1.3 62.4 + - - +
146O HIS* 3.3 11.4 - - - -
147O ILE* 2.7 32.2 - - - +
148O ALA 3.3 2.6 + - - -
169O PRO* 3.8 8.5 - - - +
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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