Contacts of the helix formed by residues 112 - 117 (chain A) in PDB entry 4IYM
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 GLY 112 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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108A GLU 4.3 0.4 + - - -
109A PHE 3.1 11.2 + - - -
110A VAL 2.9 1.8 - - - -
111A ILE* 1.3 75.8 - - - +
113A ILE* 1.3 58.6 + - - +
114A PRO* 3.1 6.1 - - - -
115A HIS* 3.2 10.2 + - - +
116A LEU* 2.8 34.5 + - - +
108C GLU 5.7 1.8 - - - -
109C PHE* 5.7 3.4 - - - -
112C GLY* 5.2 15.3 - - - -
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Residues in contact with ILE 113 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
60A PRO* 3.7 21.8 - - + +
63A ARG* 4.4 1.3 - - - +
64A ALA* 4.0 10.1 - - + +
110A VAL* 2.9 20.1 + - + +
112A GLY* 1.3 77.0 - - - +
114A PRO* 1.4 74.9 - - + +
116A LEU* 4.0 7.9 - - + -
117A GLN* 2.9 49.2 + - + +
163A ALA* 3.4 35.0 - - + +
164A CYS* 3.9 21.8 - - - -
467A ILE* 4.1 18.6 - - + -
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Residues in contact with PRO 114 (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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60A PRO* 3.7 39.7 - - + +
61A GLN* 4.0 20.4 - - + +
64A ALA* 4.3 1.6 - - + -
111A ILE 3.4 13.0 - - - +
112A GLY* 3.1 7.9 - - - -
113A ILE* 1.4 96.7 - - + +
115A HIS* 1.3 59.9 + - - +
117A GLN* 3.8 4.7 + - + +
118A LYS* 3.8 15.2 + - - +
109C PHE* 6.5 0.7 - - + -
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Residues in contact with HIS 115 (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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112A GLY* 3.2 7.9 + - - +
114A PRO* 1.3 79.3 - - - +
116A LEU* 1.3 69.2 + - + +
117A GLN 3.2 1.2 + - - -
118A LYS* 2.8 59.2 + - + +
109C PHE* 4.1 22.5 - + + -
115C HIS* 3.8 29.0 + + - -
116C LEU* 3.6 31.5 - - + +
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Residues in contact with LEU 116 (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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109A PHE* 3.6 59.5 - - + +
110A VAL* 4.6 2.2 - - - -
112A GLY* 2.8 26.8 + - - +
113A ILE* 3.2 10.1 + - + +
115A HIS* 1.3 74.6 - - + +
117A GLN* 1.3 59.4 + - - +
118A LYS 3.6 1.7 + - - +
135A ARG* 4.0 12.0 + - - -
464A THR* 4.2 9.8 - - + +
467A ILE* 3.8 31.0 - - + +
115C HIS* 3.7 36.1 - - + +
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Residues in contact with GLN 117 (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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60A PRO* 5.7 3.5 - - + +
63A ARG* 3.0 27.0 + - - +
113A ILE* 2.9 34.3 + - + +
114A PRO* 4.4 3.1 - - + +
115A HIS 3.2 0.2 + - - -
116A LEU* 1.3 74.6 - - - +
118A LYS* 1.3 67.3 + - - +
119A SER* 3.5 1.9 + - - -
135A ARG* 2.9 46.4 + - + +
136A GLN* 4.7 1.8 - - - +
137A PRO* 4.7 2.4 - - - +
164A CYS* 3.4 26.6 + - - -
467A ILE* 4.4 5.8 - - + -
471A THR* 3.9 13.8 - - + +
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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