Contacts of the helix formed by residues 103 - 108 (chain D) in PDB entry 1FIU
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 LEU 103 (chain D).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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101D ASN* 4.5 0.6 + - - -
102D ARG* 1.3 75.6 - - + +
104D GLU* 1.3 64.7 + - - +
105D ILE* 3.1 5.4 - - + +
106D ALA* 3.0 40.2 + - + +
107D ARG* 4.0 5.0 + - - +
114D LEU* 3.9 25.1 - - + +
115D THR* 4.6 9.0 - - + +
118D ALA* 4.0 26.0 - - + -
135D TYR* 4.6 1.1 - - + +
136D THR* 2.7 46.5 + - + +
138D THR* 3.7 0.4 + - - -
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Residues in contact with GLU 104 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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95D LYS* 2.9 23.3 + - - -
97D VAL* 3.9 13.1 - - + +
101D ASN* 3.4 28.6 + - - +
102D ARG 3.1 2.8 - - - -
103D LEU* 1.3 77.4 - - - +
105D ILE* 1.3 59.0 + - + +
107D ARG* 2.9 51.9 + - - +
108D TYR* 2.7 31.1 + - + -
138D THR* 3.3 31.8 + - + +
142D ILE* 4.1 13.0 - - + -
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Residues in contact with ILE 105 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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103D LEU* 4.8 6.1 - - + -
104D GLU* 1.3 74.0 - - + +
106D ALA* 1.3 56.9 + - - +
107D ARG 3.0 5.8 - - - -
108D TYR* 3.0 28.5 + - + +
111D TYR* 3.4 34.4 - - + +
114D LEU* 3.9 16.6 - - + -
135D TYR 3.7 22.7 - - - +
136D THR 5.6 0.4 - - - +
137D ILE 4.8 8.1 - - - +
138D THR* 4.3 3.5 + - + +
139D PRO* 3.6 35.4 - - + -
142D ILE* 5.1 4.5 - - + -
180D LEU* 4.3 15.3 - - + -
205D LEU* 4.0 17.0 - - + -
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Residues in contact with ALA 106 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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103D LEU* 3.0 36.1 + - + +
105D ILE* 1.3 77.5 - - - +
107D ARG* 1.3 59.6 + - - +
108D TYR 3.1 4.8 + - - -
111D TYR* 3.4 20.6 - - - +
112D ALA* 3.5 16.2 - - - +
115D THR* 3.5 25.3 + - - +
177D MET* 3.9 6.8 - - - +
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Residues in contact with ARG 107 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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95D LYS* 3.9 10.8 - - - +
101D ASN* 4.7 5.6 - - - +
103D LEU 4.1 2.9 - - - +
104D GLU* 2.9 55.4 + - - +
106D ALA* 1.3 78.5 - - - +
108D TYR* 1.3 75.6 + - + +
177D MET* 3.1 26.9 - - - +
178D PRO* 3.9 3.8 - - - +
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Residues in contact with TYR 108 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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93D ASN* 5.5 1.2 + - - -
95D LYS* 3.6 8.8 + - - -
104D GLU* 2.7 47.0 + - + -
105D ILE* 3.0 15.8 + - + +
107D ARG* 1.3 91.9 + - + +
109D GLN* 1.3 67.7 + - - +
110D GLN* 3.4 1.1 - - - +
111D TYR* 3.0 6.9 + - + +
112D ALA* 2.9 19.8 + - - -
142D ILE* 3.5 18.7 - - + +
144D THR* 3.4 28.0 + - + +
177D MET* 4.3 2.9 - - - -
178D PRO* 3.3 38.8 - - + +
179D LEU 4.4 0.4 - - - -
180D LEU* 3.9 31.9 - - + +
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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