Contacts of the strand formed by residues 72 - 77 (chain B) in PDB entry 2IAG
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 ARG 72 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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67B ILE 3.5 0.9 - - - +
68B LEU* 3.5 2.9 - - - -
69B VAL* 2.8 38.3 + - - +
70B GLY 3.1 7.1 - - - +
71B GLY* 1.3 81.2 - - - +
73B TYR* 1.3 69.4 + - - +
74B VAL* 3.8 6.0 + - + -
360B GLU* 2.8 24.9 + - - -
380B GLY* 2.7 32.8 + - - -
382B ARG* 3.4 56.1 - - - +
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Residues in contact with TYR 73 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
23B ARG* 3.5 64.2 + - + +
32B LEU* 4.4 6.7 - - + -
34B LEU* 3.6 26.4 - - + +
66B THR* 4.1 10.3 - - + -
67B ILE 3.4 2.2 - - - -
68B LEU* 3.4 38.7 - - + +
71B GLY 4.2 11.4 - - - -
72B ARG* 1.3 79.0 + - - +
74B VAL* 1.3 60.7 + - - +
75B THR 4.0 0.2 - - - -
381B ASP* 3.6 11.3 - - - +
382B ARG 2.9 25.5 + - - +
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Residues in contact with VAL 74 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
46B PHE* 5.8 2.0 - - + -
66B THR* 3.4 1.2 - - - -
67B ILE* 2.9 43.6 + - + +
69B VAL* 3.6 27.4 - - + -
72B ARG* 4.4 9.6 - - + +
73B TYR* 1.3 75.8 - - - +
75B THR* 1.3 63.2 + - - +
76B VAL* 3.5 11.7 + - + -
382B ARG* 3.3 33.2 - - + +
384B LEU* 3.7 34.5 - - + -
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Residues in contact with THR 75 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
23B ARG* 5.3 0.2 + - - -
30B PRO* 3.9 7.2 - - + +
64B ILE* 3.8 26.2 - - + -
65B PHE 3.4 7.6 - - - +
66B THR* 2.8 21.7 + - - +
73B TYR 4.0 0.4 + - - -
74B VAL* 1.3 69.9 - - - +
76B VAL* 1.3 61.9 + - - +
377B LEU* 3.8 29.3 - - + +
381B ASP* 4.5 12.1 + - - +
382B ARG 2.7 14.3 + - - -
383B LEU* 3.2 18.4 - - + +
384B LEU 2.9 24.8 + - - -
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Residues in contact with VAL 76 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
54B LEU* 4.0 17.0 - - + -
63B ASP 3.5 1.3 - - - +
64B ILE* 3.3 27.8 - - - +
65B PHE* 2.8 47.1 + - + -
67B ILE* 4.3 6.1 - - + -
74B VAL* 4.0 14.6 - - + +
75B THR* 1.3 76.1 - - - +
77B LEU* 1.3 62.4 + - - +
78B LEU* 3.7 25.4 - - + -
384B LEU* 3.4 35.2 - - + +
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Residues in contact with LEU 77 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
63B ASP 3.4 4.3 - - - +
64B ILE* 4.5 4.5 - - + -
75B THR 3.9 0.6 + - - -
76B VAL* 1.3 72.3 - - - +
78B LEU* 1.3 78.2 + - - +
79B ASP* 3.7 15.5 - - + +
82B SER* 4.1 20.2 - - - +
83B TYR* 3.4 29.2 + - + -
86B VAL* 4.2 16.4 - - + -
367B MET* 4.2 15.3 - - + -
369B MET* 3.7 31.4 - - + -
383B LEU* 4.6 7.9 - - + -
384B LEU 3.0 6.1 + - - -
385B LEU* 3.4 33.9 - - + -
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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
------------------------------------------------------------
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