Contacts of the helix formed by residues 119 - 126 (chain A) in PDB entry 1U5H
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 CYS 119 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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94A GLU 3.8 8.5 - - - +
95A SER* 4.9 1.8 - - - -
115A ARG* 3.0 41.4 + - - +
116A GLY 3.5 2.9 - - - +
118A VAL* 1.3 85.3 - - - +
120A ALA* 1.3 59.7 + - - -
121A ALA 3.3 2.9 - - - -
122A GLU* 3.0 18.0 + - + +
123A ILE* 2.6 46.8 + - + +
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Residues in contact with ALA 120 (chain A).
Click here for Legend to table.
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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111A VAL* 5.1 3.8 - - + -
116A GLY 3.0 11.9 + - - +
117A ALA* 3.3 18.2 + - - +
118A VAL 3.4 1.2 - - - -
119A CYS* 1.3 76.7 - - - +
121A ALA* 1.3 58.4 + - - +
123A ILE* 3.6 5.6 - - - +
124A ALA* 2.9 31.0 + - - +
132A MET* 4.6 3.1 - - - +
165A THR* 3.8 20.9 - - + +
166A ILE* 4.6 10.8 - - + -
169A ALA* 3.8 13.1 - - + +
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Residues in contact with ALA 121 (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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118A VAL 5.2 0.2 + - - -
119A CYS 3.3 0.8 - - - -
120A ALA* 1.3 77.6 - - - +
122A GLU* 1.3 68.9 + - - +
124A ALA 3.3 0.3 + - - -
125A ALA* 2.9 31.9 + - - +
169A ALA* 4.1 13.8 - - + +
173A PHE* 3.7 20.4 - - + -
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Residues in contact with GLU 122 (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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96A ALA* 3.7 19.9 - - + +
118A VAL 4.0 5.0 - - - +
119A CYS* 3.0 30.4 + - + +
121A ALA* 1.3 87.6 + - - +
123A ILE* 1.3 71.0 + - + +
125A ALA* 3.5 5.8 + - - +
126A ALA* 3.3 16.1 + - - -
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Residues in contact with ILE 123 (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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93A ALA* 4.6 7.6 - - + +
94A GLU* 4.2 5.6 - - - +
95A SER* 3.3 27.4 - - - +
96A ALA* 3.3 24.7 - - - +
99A VAL* 4.0 9.6 - - + +
109A ALA* 3.5 31.6 - - + -
111A VAL* 4.9 5.6 - - + -
116A GLY 5.0 2.2 - - - +
119A CYS* 2.6 43.8 + - + +
120A ALA* 3.6 7.0 - - - +
122A GLU* 1.3 81.4 - - + +
124A ALA* 1.3 59.4 + - - +
126A ALA* 3.3 8.5 + - - +
129A THR* 2.8 23.7 + - - -
132A MET* 3.8 6.7 - - - -
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Residues in contact with ALA 124 (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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120A ALA 2.9 17.3 + - - +
121A ALA 3.8 3.8 - - - +
123A ILE* 1.3 78.4 - - - +
125A ALA* 1.3 58.4 + - - +
126A ALA 3.4 0.5 + - - -
129A THR* 3.6 2.8 - - - -
132A MET* 3.7 23.6 - - + -
169A ALA* 3.4 33.0 - - + +
170A ALA* 4.3 1.1 - - - +
173A PHE* 3.8 7.1 - - + +
175A ARG* 2.8 32.8 + - + -
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Residues in contact with ALA 125 (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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121A ALA 2.9 17.8 + - - +
122A GLU* 4.0 5.8 - - - +
123A ILE 3.2 0.2 - - - -
124A ALA* 1.3 78.0 - - - +
126A ALA* 1.3 62.7 + - - +
127A ASP* 3.5 2.3 + - - -
173A PHE* 3.6 33.3 - - + -
175A ARG* 3.4 7.5 + - - +
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Residues in contact with ALA 126 (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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96A ALA* 4.2 18.4 - - + +
99A VAL* 3.8 20.9 - - + -
100A ILE* 4.3 5.8 - - + -
122A GLU 3.3 10.8 + - - +
123A ILE 3.5 13.9 - - - +
124A ALA 3.3 1.6 - - - -
125A ALA* 1.3 74.0 - - - +
127A ASP* 1.3 68.3 + - - +
128A PRO* 3.3 3.4 - - + -
129A THR* 3.0 19.2 + - - +
175A ARG* 3.1 11.3 + - - -
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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