Contacts of the helix formed by residues 59 - 64 (chain T) in PDB entry 4IBL
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 59 (chain T).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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14T TRP* 3.9 26.5 - - + -
21T THR* 2.9 12.4 + - + +
23T LEU* 3.9 26.2 - - + -
36T VAL* 4.3 14.8 - - + -
38T ILE* 4.2 26.2 - - + -
48T LYS* 3.6 33.9 - - + +
57T CYS* 3.7 14.8 - - - +
58T ASP* 1.3 75.2 - - - +
60T THR* 1.3 66.8 + - - +
61T ASP 3.2 3.1 - - - -
62T GLU* 3.0 16.2 + - + +
63T ILE* 3.1 15.5 + - + +
73T ALA* 4.3 4.5 - - + -
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Residues in contact with THR 60 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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19T PHE 3.7 6.3 - - - +
20T LYS* 3.5 8.1 - - - +
21T THR 2.9 22.5 + - - +
58T ASP* 2.6 27.6 + - - -
59T LEU* 1.3 76.6 - - - +
61T ASP* 1.3 73.2 + - - +
63T ILE* 3.1 10.0 + - - +
64T VAL* 3.0 29.4 + - + +
133T LEU* 3.6 39.9 - - + +
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Residues in contact with ASP 61 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
76L PHE 4.1 2.3 - - - +
77L GLU* 3.7 26.2 + - - +
85L LYS* 2.6 42.5 + - - +
48T LYS* 4.6 5.4 - - - +
58T ASP* 5.1 1.0 + - - +
59T LEU 3.1 1.6 + - - -
60T THR* 1.3 89.7 - - - +
62T GLU* 1.3 62.1 + - - +
64T VAL* 3.8 13.8 - - - +
65T LYS* 3.7 19.3 - - - +
135T ARG* 4.8 14.1 + - - -
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Residues in contact with GLU 62 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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38T ILE* 3.9 31.8 - - + +
46T LYS* 3.7 27.2 - - - +
48T LYS* 4.0 32.9 + - + +
59T LEU* 3.0 10.7 + - + +
61T ASP* 1.3 79.8 - - - +
63T ILE* 1.3 62.9 + - - +
65T LYS* 2.8 56.8 + - - +
71T TYR* 3.8 10.2 + - + -
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Residues in contact with ILE 63 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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14T TRP* 5.0 3.4 - - + -
19T PHE* 3.5 27.6 - - + +
21T THR* 3.6 25.1 - - + +
38T ILE* 3.8 23.6 - - + -
59T LEU* 3.1 15.4 + - + +
60T THR* 3.1 9.5 + - - +
62T GLU* 1.3 73.7 - - - +
64T VAL* 1.3 76.3 + - + +
65T LYS 3.1 2.7 + - - -
66T ASP 3.2 24.9 + - - +
67T VAL* 3.4 2.6 + - + -
71T TYR* 3.4 22.6 + - + -
100T PHE* 5.1 0.9 - - + -
102T PRO* 3.8 30.1 - - + -
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Residues in contact with VAL 64 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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19T PHE* 4.1 7.2 - - + -
60T THR* 3.0 27.7 + - + +
61T ASP* 3.8 16.2 - - - +
63T ILE* 1.3 87.3 - - + +
65T LYS* 1.3 66.9 + - + +
66T ASP* 3.1 2.2 + - - -
67T VAL* 3.9 9.4 + - + +
133T LEU 3.9 25.8 - - - +
134T VAL* 4.0 35.7 - - + +
135T ARG* 5.1 5.6 - - + +
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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