Contacts of the strand formed by residues 64 - 68 (chain A) in PDB entry 4ISO
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 TRP 64 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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33A LEU* 3.8 28.9 - - + -
34A HIS 3.2 20.0 - - - -
35A ALA* 3.7 9.0 - - + -
41A ILE* 3.7 40.2 - - + -
42A CYS* 5.0 0.7 - - + -
58A CYS* 3.4 19.7 - - + -
59A TYR* 3.4 28.2 - + - -
60A ASP* 2.8 58.4 + - + +
61A PRO 3.4 7.6 + - - +
62A THR 3.3 1.4 - - - -
63A GLN* 1.3 83.7 - - + +
65A THR* 1.3 65.2 + - - +
84A ARG* 3.8 24.3 + - - -
85A LEU* 3.8 23.0 + - + -
88A ILE* 3.9 12.1 - - + -
304A PEG 3.7 2.2 - - - -
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Residues in contact with THR 65 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
32A SER 3.6 1.0 - - - +
33A LEU* 3.6 5.1 - - - -
34A HIS* 2.8 35.6 + - - +
64A TRP* 1.3 75.3 + - - +
66A ALA* 1.3 63.4 + - - +
67A PHE* 3.8 16.0 - - + -
82A GLU* 3.4 41.4 + - + +
83A ARG 3.4 8.3 - - - +
84A ARG* 4.0 6.4 - - - -
304A PEG 2.9 42.7 + - - +
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Residues in contact with ALA 66 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
31A VAL* 3.8 18.8 - - + -
32A SER 3.4 4.7 - - - -
33A LEU* 3.9 15.7 - - + +
52A LEU* 4.2 11.0 - - + -
64A TRP 4.3 0.2 - - - -
65A THR* 1.3 74.0 - - - +
67A PHE* 1.3 60.7 + - - +
68A LEU* 4.0 3.4 + - + +
81A GLN 3.7 0.9 - - - +
82A GLU* 3.5 4.2 - - - -
83A ARG* 2.7 41.6 + - + +
85A LEU* 4.3 4.1 - - + +
108A LEU* 4.3 13.7 - - + -
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Residues in contact with PHE 67 (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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30A GLN 4.5 0.2 - - - +
31A VAL* 3.4 5.1 - - - +
32A SER* 2.8 34.3 + - - +
34A HIS* 3.6 44.9 - + + -
65A THR* 3.8 21.3 - - + -
66A ALA* 1.3 74.0 - - - +
68A LEU* 1.3 63.4 + - - +
70A LEU* 4.1 24.2 - - + +
76A ARG* 3.7 37.5 - - + -
80A VAL* 4.0 20.0 - - + -
81A GLN 3.5 1.8 - - - +
82A GLU* 3.6 32.5 - - + -
304A PEG 4.2 9.6 - - - -
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Residues in contact with LEU 68 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
28A PRO 5.8 1.1 - - - +
30A GLN 4.6 5.4 - - - -
31A VAL* 4.1 20.4 - - + -
46A LEU* 3.7 37.0 - - + -
52A LEU* 4.6 2.0 - - + -
66A ALA* 4.2 10.3 - - + +
67A PHE* 1.3 75.3 - - - +
69A GLY* 1.3 65.5 + - - +
70A LEU 3.2 2.5 + - - -
80A VAL* 3.4 2.8 - - - +
81A GLN* 2.8 48.0 + - + +
83A ARG* 3.7 28.7 - - + -
108A LEU* 4.5 6.7 - - + -
112A ALA* 3.9 15.5 - - + -
118A VAL* 3.9 15.5 - - + -
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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