Contacts of the helix formed by residues 16 - 22 (chain B) in PDB entry 6V3O
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 ILE 16 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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15B SER* 1.3 73.0 + - - +
17B ASP* 1.3 67.0 + - - +
18B ALA 3.3 2.3 + - - -
19B GLN* 3.4 16.6 + - - +
20B LEU* 3.5 31.8 + - + +
38B ASP 4.1 1.6 - - - +
39B ALA* 3.8 17.0 - - - -
42B VAL* 3.8 26.5 - - + -
43B ASP* 3.1 19.7 + - - +
46B LEU* 3.8 24.9 - - + -
62B GLN* 4.2 9.6 - - + +
65B TYR* 3.6 33.2 + - + +
105B MET* 5.6 0.2 - - + -
897B TYR* 4.0 11.2 - - - +
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Residues in contact with ASP 17 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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15B SER* 2.8 16.9 + - - +
16B ILE* 1.3 78.0 - - - +
18B ALA* 1.3 65.6 + - - +
20B LEU* 3.1 16.9 + - - +
21B ARG* 2.9 47.6 + - - +
35B ILE* 3.9 5.9 - - - +
36B GLU* 4.6 7.3 - - - +
39B ALA* 3.7 22.9 - - + +
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Residues in contact with ALA 18 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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14B HIS* 6.5 0.4 - - + -
15B SER* 4.4 4.8 + - - +
16B ILE 3.3 1.0 - - - -
17B ASP* 1.3 78.7 - - - +
19B GLN* 1.3 73.1 + - - +
21B ARG* 3.1 21.2 + - - +
22B GLN* 3.4 20.5 + - - +
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Residues in contact with GLN 19 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
14B HIS* 4.5 8.7 + - - -
15B SER 3.8 15.8 - - - +
16B ILE* 3.4 8.1 + - - -
17B ASP 3.3 0.6 - - - -
18B ALA* 1.3 84.6 - - - +
20B LEU* 1.3 58.8 + - - +
22B GLN* 4.1 17.6 + - - +
23B LEU* 3.6 19.1 + - - +
62B GLN* 5.3 0.2 + - - -
65B TYR* 3.9 21.8 - - + +
66B GLU* 3.5 43.2 + - + +
69B ALA* 4.2 11.3 - - + +
70B ASP* 4.2 18.3 + - - +
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Residues in contact with LEU 20 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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16B ILE* 3.5 22.6 + - + +
17B ASP 3.1 8.5 + - - +
19B GLN* 1.3 78.5 - - - +
21B ARG* 1.3 66.3 + - - +
22B GLN 3.2 0.2 - - - -
23B LEU* 3.0 29.0 + - + +
24B VAL 3.7 3.5 + - - -
35B ILE* 3.8 29.4 - - + +
38B ASP* 3.6 33.0 - - + +
39B ALA* 4.3 2.2 - - + +
65B TYR* 3.1 28.0 - - + +
893B LEU* 3.5 37.4 - - + +
896B PRO* 4.8 0.4 - - + -
897B TYR* 4.7 2.9 - - - +
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Residues in contact with ARG 21 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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17B ASP* 2.9 37.3 + - - +
18B ALA* 3.1 10.7 + - - +
20B LEU* 1.3 75.4 - - - +
22B GLN* 1.3 61.0 + - + +
23B LEU 3.1 1.7 + - - -
24B VAL 3.1 24.8 + - - +
27B LYS* 5.5 9.1 - - - +
35B ILE* 3.6 30.1 - - + +
36B GLU* 3.4 36.2 + - - +
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Residues in contact with GLN 22 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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18B ALA* 3.4 19.0 + - - +
19B GLN* 4.1 15.8 - - - +
20B LEU 3.2 1.2 - - - -
21B ARG* 1.3 77.3 - - + +
23B LEU* 1.3 63.6 - - + +
24B VAL 3.6 0.7 - - - -
70B ASP* 4.9 5.9 - - - +
73B GLY* 5.0 8.0 - - - -
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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