Contacts of the helix formed by residues 126 - 130 (chain H) 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 LYS 126 (chain H).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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133F THR* 4.5 15.5 - - - +
137F GLN* 5.6 7.4 - - - +
8H ATP 3.1 6.5 - - - +
80H MET* 3.2 39.3 - - + -
125H ASN* 1.3 77.3 - - - +
127H ILE* 1.3 53.1 + - - +
128H GLN* 2.6 32.4 + - + +
129H ASP* 2.6 41.7 + - - +
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Residues in contact with ILE 127 (chain H).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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8H ATP 3.0 21.4 + - - +
54H ILE* 3.4 40.8 - - + -
78H ILE* 3.8 15.5 - - + +
126H LYS* 1.3 68.9 - - - +
128H GLN* 1.3 81.6 + - + +
129H ASP 2.8 7.2 + - - -
130H PHE* 3.2 12.3 + - - -
135H TYR* 2.5 28.8 + - - +
145H LEU* 4.0 15.3 - - + -
150H ALA* 3.9 24.7 - - + +
153H TRP* 3.5 17.9 - - + -
154H ILE* 4.2 5.2 - - + -
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Residues in contact with GLN 128 (chain H).
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* 3.5 15.2 + - - +
133F THR* 3.8 16.6 + - + +
8H ATP 3.0 17.9 + - - -
80H MET* 5.4 1.0 - - - +
126H LYS* 2.6 21.2 + - + +
127H ILE* 1.3 89.2 - - - +
129H ASP* 1.3 61.6 + - - -
130H PHE 3.4 2.7 - - - -
149H ILE* 5.8 1.6 - - - +
150H ALA* 4.6 8.8 + - - +
153H TRP* 3.5 47.9 - - + +
908H GLN* 4.9 12.2 - - + +
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Residues in contact with ASP 129 (chain H).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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130F PHE* 3.3 18.4 - - + +
131F ASN* 3.2 28.8 + - - +
133F THR* 3.8 15.6 - - - +
134F PHE* 4.0 21.4 - - + +
137F GLN* 4.9 8.2 + - - -
125H ASN* 3.4 15.7 - - + +
126H LYS* 2.6 50.4 + - - +
128H GLN* 1.3 76.4 - - - +
130H PHE* 1.3 71.5 + - + +
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Residues in contact with PHE 130 (chain H).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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125F ASN* 3.8 17.5 - - - -
129F ASP* 3.3 14.6 - - + -
130F PHE* 4.0 13.9 - + - -
131F ASN* 2.9 15.8 + - - -
78H ILE* 3.9 14.8 - - + -
123H HIS* 4.2 8.3 - - + -
125H ASN* 3.1 45.8 - - + -
126H LYS 4.6 1.6 - - - -
127H ILE 3.2 12.7 + - - -
129H ASP* 1.3 78.6 - - + +
131H ASN* 1.3 58.7 + - - +
134H PHE* 3.1 58.1 - + + -
135H TYR* 3.5 12.3 - - + -
153H TRP* 3.7 22.2 - - - -
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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