Contacts of the helix formed by residues 100 - 105 (chain A) in PDB entry 1N6U
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 100 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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46A MET* 4.7 13.6 - - + +
76A HIS 3.3 26.2 - - - -
77A GLU* 3.5 20.9 - - - -
78A ALA* 3.9 15.9 - - + +
98A ASN* 3.3 12.8 + - - +
99A PHE* 1.3 72.0 - - - +
101A LEU* 1.3 52.1 + - - +
102A ALA* 3.6 4.5 - - + -
103A ILE* 3.3 53.7 - - + +
104A ASP* 2.5 48.6 + - + +
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Residues in contact with LEU 101 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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16A ILE* 3.8 11.9 - - + -
18A LEU* 5.6 0.2 - - + -
23A SER* 3.6 17.3 - - - +
72A TRP* 3.4 34.1 - - + +
74A SER 4.0 4.7 - - - +
75A THR* 3.7 8.3 - - - +
77A GLU 3.6 13.9 + - - +
79A TYR* 3.4 39.9 - - + +
99A PHE* 3.3 4.9 + - + +
100A TRP* 1.3 68.7 - - - +
102A ALA* 1.3 57.5 + - - +
103A ILE 2.6 16.2 + - - -
104A ASP* 2.7 12.0 + - - -
105A MET* 2.7 48.1 + - + +
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Residues in contact with ALA 102 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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75A THR* 2.7 30.0 + - - +
76A HIS* 3.6 19.1 - - + +
100A TRP* 3.6 18.1 - - + -
101A LEU* 1.3 72.8 - - - +
103A ILE* 1.3 63.7 + - + +
105A MET* 4.4 4.9 - - - -
139A LEU* 4.6 4.9 - - - +
187A HIS* 3.4 23.6 + - - +
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Residues in contact with ILE 103 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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100A TRP* 3.3 65.0 + - + +
101A LEU 2.6 4.4 + - - -
102A ALA* 1.3 84.3 - - + +
104A ASP* 1.3 58.7 + - + +
187A HIS* 3.1 31.4 + - + +
189A ASP* 5.5 9.4 - - + +
191A GLN* 5.5 8.7 - - + +
192A ALA* 3.4 10.2 - - - +
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Residues in contact with ASP 104 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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15A LYS* 5.8 1.2 + - - -
16A ILE* 4.4 9.9 - - + +
100A TRP* 2.5 33.7 + - + +
101A LEU* 2.7 4.2 + - - -
103A ILE* 1.3 71.4 - - + +
105A MET* 1.3 73.2 + - - +
106A SER* 3.1 27.7 + - - -
192A ALA* 4.2 7.9 - - - +
194A ILE* 3.5 16.1 - - - +
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Residues in contact with MET 105 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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16A ILE* 6.1 0.8 - - - +
18A LEU* 3.1 37.2 - - + -
23A SER* 5.8 0.2 - - - -
75A THR* 3.5 30.1 - - + -
101A LEU* 2.7 58.2 + - + +
102A ALA* 3.9 4.0 - - - -
104A ASP* 1.3 79.6 + - - +
106A SER* 1.3 58.6 + - - +
107A PHE 3.8 0.7 - - - -
136A GLN* 5.1 3.4 - - - +
137A PHE* 4.8 7.2 - - + -
139A LEU* 3.3 48.0 - - + -
185A LEU* 3.0 21.6 - - + +
187A HIS* 5.2 2.0 - - + -
194A ILE* 3.1 1.6 - - - +
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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