Contacts of the helix formed by residues 15 - 21 (chain F) in PDB entry 2I2X
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 15 (chain F).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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233E LEU* 4.0 14.1 - - + +
240E HIS* 4.7 0.2 + - - -
362E TYR 3.6 16.8 - - - +
363E ARG 2.7 27.8 + - - +
364E ASP* 2.9 26.6 + - - +
365E PRO* 3.5 12.7 - - - +
412E LEU* 5.2 1.3 - - - +
413E GLU* 2.9 44.3 + - - +
414E LEU* 4.0 1.7 - - - +
418E GLU* 3.0 35.5 + - - -
13F LEU* 4.2 8.2 - - + +
14F THR* 1.3 74.0 - - - +
16F TYR* 1.3 65.7 + - - +
17F ASN* 3.2 26.2 + - - +
18F VAL* 3.0 26.8 + - + +
19F ALA* 4.2 2.3 + - - +
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Residues in contact with TYR 16 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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233E LEU* 4.4 2.8 - - + +
234E LEU* 3.9 16.4 - - + -
14F THR* 3.2 38.1 + - + -
15F ARG* 1.3 71.0 - - - +
17F ASN* 1.3 63.6 + - - +
18F VAL 3.2 0.5 + - - -
19F ALA* 3.4 8.8 + - - +
20F LEU* 3.3 22.3 + - - +
74G VAL* 3.3 38.6 - - + +
77G GLY* 3.9 6.3 - - - -
78G PHE 2.6 29.6 + - - -
79G PRO* 3.3 13.3 - - - +
116G TYR* 3.4 51.4 - + + -
117G GLY 4.7 0.9 - - - -
118G ILE* 3.4 15.9 - - + +
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Residues in contact with ASN 17 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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233E LEU* 3.2 37.3 - - - +
234E LEU* 3.5 14.6 - - + +
415E SER* 4.3 9.7 + - - -
418E GLU* 3.7 22.5 - - - +
15F ARG* 3.3 35.8 + - - +
16F TYR* 1.3 75.1 - - - +
18F VAL* 1.3 67.4 + - - +
20F LEU* 3.2 5.8 + - - +
21F GLU* 3.1 23.7 + - - +
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Residues in contact with VAL 18 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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413E GLU* 3.5 53.6 - - + +
414E LEU 3.9 7.4 - - - +
415E SER* 3.8 23.1 - - - +
416E ARG* 5.4 2.8 + - - -
15F ARG* 3.0 30.0 + - + +
17F ASN* 1.3 79.1 - - - +
19F ALA* 1.3 65.4 + - - +
20F LEU 3.2 0.2 + - - -
21F GLU* 3.3 16.1 + - - +
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Residues in contact with ALA 19 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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14F THR* 6.3 2.7 - - + -
15F ARG 4.2 2.1 + - - +
16F TYR* 3.4 9.3 + - - +
17F ASN 3.4 0.4 - - - -
18F VAL* 1.3 81.6 - - - +
20F LEU* 1.3 61.8 + - + +
21F GLU 3.7 4.5 + - - +
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Residues in contact with LEU 20 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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234E LEU* 4.0 21.1 - - + -
16F TYR 3.3 8.8 + - - +
17F ASN* 3.2 9.1 + - - +
18F VAL 3.2 1.0 - - - -
19F ALA* 1.3 77.1 - - + +
21F GLU* 1.3 68.7 + - - +
22F LYS* 3.3 7.8 + - - +
115G GLU* 4.2 31.9 - - - +
116G TYR* 3.6 29.4 - - + +
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Residues in contact with GLU 21 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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415E SER* 3.5 10.8 - - - -
416E ARG* 2.9 58.0 + - - +
417E PHE* 2.9 36.6 + - - +
17F ASN 3.1 11.1 + - - +
18F VAL 3.3 14.8 + - - +
19F ALA 4.1 5.0 - - - +
20F LEU* 1.3 76.6 - - - +
22F LYS* 1.3 68.9 - - - +
23F ALA 3.8 0.7 + - - -
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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