Contacts of the helix formed by residues 76 - 82 (chain A) in PDB entry 3SKU
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 GLU 76 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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53A LEU* 3.8 18.0 - - + +
74A PRO 4.3 0.8 + - - -
75A SER* 1.3 70.5 - - - +
77A ALA* 1.3 68.1 + - - +
78A PRO* 3.4 0.4 - - - -
79A GLN* 2.9 32.1 + - - +
80A ILE* 3.4 28.8 + - - +
173A TRP* 3.8 14.8 - - + -
175A GLU* 2.5 16.0 + - - +
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Residues in contact with ALA 77 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
75A SER* 3.2 8.7 - - - +
76A GLU* 1.3 73.5 - - - +
78A PRO* 1.3 77.5 - - + +
80A ILE* 2.7 22.0 + - - +
81A VAL* 3.5 1.9 + - - +
124A LEU* 3.4 20.6 - - + -
149A LEU* 4.4 1.1 - - + -
168A VAL* 3.5 27.1 - - + -
170A ILE* 4.4 8.2 - - + +
173A TRP* 3.7 13.4 - - + -
175A GLU* 3.5 3.6 + - - -
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Residues in contact with PRO 78 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
75A SER* 3.4 20.2 - - - +
77A ALA* 1.3 94.9 - - + +
79A GLN* 1.3 68.5 + - + +
81A VAL* 2.7 31.8 + - + +
82A ARG* 2.7 28.1 + - + +
124A LEU* 3.7 22.2 - - + -
149A LEU* 4.8 3.4 - - + -
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Residues in contact with GLN 79 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
75A SER 5.7 0.2 - - - +
76A GLU* 2.9 27.4 + - - +
77A ALA 2.8 1.8 + - - -
78A PRO* 1.3 87.8 - - + +
80A ILE* 1.3 59.9 + - - +
82A ARG* 3.2 42.7 + - - +
83A GLY* 3.1 23.9 + - - +
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Residues in contact with ILE 80 (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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53A LEU* 5.7 0.9 - - + -
76A GLU* 3.4 30.3 - - - +
77A ALA* 2.7 20.1 + - - +
79A GLN* 1.3 73.9 - - - +
81A VAL* 1.3 60.8 + - + +
83A GLY 3.3 18.3 - - - +
84A ALA* 3.3 8.7 + - - +
120A TYR* 5.2 0.3 - - - -
170A ILE* 4.8 12.6 - - + -
173A TRP* 3.7 55.9 - - + +
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Residues in contact with VAL 81 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
77A ALA 3.5 0.2 + - - -
78A PRO* 2.7 14.5 + - + +
80A ILE* 1.3 75.2 - - - +
82A ARG* 1.3 67.8 + - + +
84A ALA* 3.3 15.8 + - - +
89A ARG* 3.8 6.1 + - - -
93A TYR* 3.7 32.8 - - + +
120A TYR* 3.4 52.5 - - + +
122A LYS 4.8 4.9 - - - +
124A LEU* 4.3 7.4 - - + +
170A ILE* 3.7 29.8 - - + -
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Residues in contact with ARG 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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78A PRO* 2.7 27.9 + - + +
79A GLN* 3.2 40.1 + - - +
81A VAL* 1.3 76.7 - - + +
83A GLY* 1.3 56.1 + - - +
84A ALA 3.4 0.2 - - - -
89A ARG* 3.0 21.8 + - - +
120A TYR 5.3 5.2 - - - +
122A LYS 6.2 0.4 - - - +
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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