Contacts of the helix formed by residues 131 - 136 (chain F) in PDB entry 1R4N
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 ASN 131 (chain F).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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130F PHE* 1.3 74.3 - - - +
132F ASP* 1.3 78.1 + - - +
133F THR* 2.6 27.2 + - - -
134F PHE* 2.6 17.2 + - - +
135F TYR* 3.8 2.0 + - - -
157F MET* 4.0 7.4 - - - -
128H GLN 3.5 7.5 + - - +
129H ASP 3.2 5.6 + - - +
130H PHE 2.9 35.6 + - - -
131H ASN* 3.6 17.8 - - + +
153H TRP* 5.3 2.4 - - - -
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Residues in contact with ASP 132 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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131F ASN* 1.3 77.2 - - - +
133F THR* 1.3 75.2 + - - -
134F PHE 2.9 1.7 + - - -
135F TYR* 3.0 3.2 + - - +
136F ARG* 2.9 44.1 + - - +
157F MET* 3.4 33.5 - - + +
160F SER* 5.1 2.5 - - - +
161F LEU* 3.6 16.2 - - + -
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Residues in contact with THR 133 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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131F ASN* 2.6 19.9 + - - -
132F ASP* 1.3 84.2 + - - +
134F PHE* 1.3 62.2 + - - +
136F ARG* 3.7 20.3 + - - +
137F GLN* 4.1 7.3 + - - +
126H LYS* 4.5 16.6 - - - +
128H GLN* 3.8 14.0 + - + +
129H ASP* 3.8 16.2 - - - +
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Residues in contact with PHE 134 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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76F HIS* 4.9 0.7 - + - -
78F ILE* 3.7 20.6 - - + -
123F HIS* 4.1 21.8 - + - -
130F PHE* 3.1 57.9 - + + -
131F ASN 2.6 16.4 + - - +
133F THR* 1.3 74.8 - - - +
135F TYR* 1.3 70.1 + + - +
137F GLN* 2.9 50.2 - - - +
138F PHE* 3.7 23.5 - + - -
125H ASN* 3.9 9.9 - - - -
129H ASP* 4.0 26.4 + - - +
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Residues in contact with TYR 135 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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52F LEU* 3.7 31.9 - - + -
54F ILE* 4.5 9.9 - - + -
78F ILE* 4.2 2.8 - - + +
127F ILE* 2.5 40.6 + - - +
130F PHE* 3.5 29.5 - - + -
131F ASN 4.1 5.8 - - - -
132F ASP* 3.0 5.1 + - - +
134F PHE* 1.3 81.5 - + - +
136F ARG* 1.3 63.6 + - - +
137F GLN 2.8 7.2 + - - -
138F PHE* 3.2 23.2 + - - +
141F ILE* 4.2 17.1 - - + +
153F TRP* 3.6 6.9 - + - -
154F ILE* 4.5 6.7 - - + -
157F MET* 3.5 34.8 - - + -
158F LEU* 4.9 1.1 - - + -
161F LEU* 4.2 13.2 - - + +
175F VAL* 5.0 1.6 - - - +
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Residues in contact with ARG 136 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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132F ASP* 2.9 38.6 + - - +
133F THR* 3.8 11.2 - - - +
134F PHE 3.3 0.2 - - - -
135F TYR* 1.3 75.9 - - - +
137F GLN* 1.3 62.7 + - - +
138F PHE 3.3 6.8 + - - +
160F SER 4.4 5.1 + - - -
161F LEU* 3.8 54.9 + - + +
175F VAL* 5.4 2.8 - - - +
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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