Contacts of the helix formed by residues 81 - 87 (chain A) in PDB entry 3EUP
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 THR 81 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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79A CYS* 3.8 0.2 - - - +
80A ASN* 1.3 80.0 - - - +
82A TYR* 1.3 63.5 + - - +
83A LYS* 3.9 5.5 - - + +
84A GLU* 2.7 61.9 + - + +
85A MET* 3.2 18.6 + - - +
149A GLU* 2.2 40.2 + - - -
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Residues in contact with TYR 82 (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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81A THR* 1.3 73.2 + - - +
83A LYS* 1.3 65.8 + - - +
85A MET* 2.9 49.6 + - + +
86A LEU* 3.1 16.8 + - - +
140A ILE* 4.0 9.6 - - + +
143A LYS* 3.5 35.0 - - + +
144A GLY* 3.7 24.0 - - - -
146A GLN* 5.6 1.0 + - - -
147A ALA* 3.6 23.3 - - + -
149A GLU* 3.2 25.6 + - - +
150A PHE* 4.0 9.6 - - + -
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Residues in contact with LYS 83 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
81A THR* 3.9 7.2 - - + +
82A TYR* 1.3 76.1 - - - +
84A GLU* 1.3 62.2 + - + +
86A LEU* 3.1 11.9 + - - +
87A LEU* 3.3 37.4 + - + +
149A GLU* 2.8 18.7 + - - +
150A PHE* 3.7 15.1 - - + -
191A GLU* 5.2 4.7 - - - -
194A ILE* 4.0 14.6 - - + -
195A ALA* 4.4 12.4 - - - +
198A GLU* 2.9 41.7 + - - +
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Residues in contact with GLU 84 (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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79A CYS* 3.5 16.6 - - - -
80A ASN* 2.7 40.5 + - - +
81A THR* 2.7 30.6 + - + +
83A LYS* 1.3 80.2 - - + +
85A MET* 1.3 62.8 + - - +
87A LEU* 3.0 18.0 + - - +
88A VAL* 3.3 15.8 + - - +
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Residues in contact with MET 85 (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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76A VAL* 3.7 39.2 - - + +
79A CYS* 3.6 24.5 - - + +
81A THR 3.4 11.4 - - - +
82A TYR* 2.9 45.9 + - + +
84A GLU* 1.3 78.2 - - - +
86A LEU* 1.3 59.9 + - - +
87A LEU 3.5 0.7 + - - -
88A VAL* 3.6 20.1 - - - +
89A TYR* 4.4 4.2 + - - -
137A LEU* 5.8 0.2 - - - +
140A ILE* 3.0 43.0 - - + +
143A LYS* 5.8 0.4 - - + -
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Residues in contact with LEU 86 (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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82A TYR 3.1 7.8 + - - +
83A LYS 3.1 6.8 + - - +
85A MET* 1.3 75.4 - - - +
87A LEU* 1.3 65.3 + - - +
88A VAL 3.6 0.9 - - - -
89A TYR* 3.2 21.9 - - - -
137A LEU* 4.1 11.4 - - + +
140A ILE* 3.5 27.4 - - + -
141A ILE* 3.9 20.0 - - + -
150A PHE* 3.7 35.0 - - + -
159A ILE* 5.8 0.2 - - + -
163A MET* 3.3 30.3 - - + +
190A LEU* 4.3 1.0 - - - +
194A ILE* 3.5 29.8 - - + -
197A ILE* 4.8 2.5 - - + -
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Residues in contact with LEU 87 (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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83A LYS* 3.4 43.1 - - + +
84A GLU* 3.0 10.2 + - - +
86A LEU* 1.3 80.2 - - - +
88A VAL* 1.3 58.7 + - - +
89A TYR* 3.2 7.4 + - - +
90A SER* 4.3 7.8 + - - -
91A SER* 5.1 1.0 + - - -
190A LEU* 3.8 20.6 - - + -
191A GLU* 3.9 43.3 - - + +
194A ILE* 3.1 31.2 - - + -
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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