Contacts of the helix formed by residues 21 - 29 (chain c) in PDB entry 6FF7
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 21 (chain c).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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20c LEU* 1.3 71.3 - - - +
22c PHE* 1.3 60.3 + - - +
23c ARG 3.1 2.5 - - - -
24c TYR* 2.5 41.2 + - + +
25c LEU* 3.3 2.9 + - - +
33d GLY* 5.2 6.7 - - - -
34d PHE 4.2 7.3 + - - +
35d ASP* 5.2 3.7 - - + +
39d ASN* 6.0 2.0 - - + +
40d LEU 5.6 2.9 - - - +
41d VAL* 4.5 19.7 - - + -
61d VAL* 6.0 4.7 - - + -
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Residues in contact with PHE 22 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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20c LEU* 3.5 9.8 - - + +
21c ILE* 1.3 77.1 - - - +
23c ARG* 1.3 63.1 - - - +
25c LEU* 2.9 24.1 + - - +
26c GLN* 3.5 4.7 + - - +
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Residues in contact with ARG 23 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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17c PRO* 5.7 9.2 - - + -
20c LEU* 4.1 13.4 - - + +
22c PHE* 1.3 79.1 - - - +
24c TYR* 1.3 64.2 + - - +
25c LEU 3.1 0.9 + - - -
26c GLN* 3.1 21.0 + - - +
27c ASN* 3.7 6.6 + - - +
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Residues in contact with TYR 24 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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20c LEU 4.6 0.6 + - - -
21c ILE* 2.5 35.6 + - + +
23c ARG* 1.3 78.9 - - - +
25c LEU* 1.3 58.1 + - - +
27c ASN* 3.8 5.6 + - - +
28c ARG* 3.4 17.9 + - - +
41d VAL* 5.8 3.6 - - + -
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Residues in contact with LEU 25 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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21c ILE 3.3 2.0 + - - +
22c PHE* 2.9 15.3 + - - +
24c TYR* 1.3 77.8 - - - +
26c GLN* 1.3 55.8 + - - +
28c ARG* 2.7 31.0 + - + +
29c SER* 2.8 13.6 + - - -
50c PHE* 5.5 11.2 - - + -
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Residues in contact with GLN 26 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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22c PHE 3.5 4.4 + - - +
23c ARG* 3.1 14.6 + - - +
25c LEU* 1.3 76.1 - - - +
27c ASN* 1.3 61.5 + - - +
29c SER* 3.2 22.7 + - - +
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Residues in contact with ASN 27 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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23c ARG 3.7 5.5 + - - +
24c TYR 4.2 6.3 - - - +
25c LEU 3.3 0.4 - - - -
26c GLN* 1.3 78.4 - - - +
28c ARG* 1.3 59.9 + - - +
29c SER 4.3 3.6 - - - +
31c ILE* 5.1 2.3 - - - +
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Residues in contact with ARG 28 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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24c TYR 3.4 12.5 + - - +
25c LEU* 2.7 23.9 + - + +
27c ASN* 1.3 75.2 - - - +
29c SER* 1.3 63.1 + - - -
31c ILE* 2.7 34.4 + - + +
47c ILE* 5.5 4.0 - - + +
89c SER* 6.3 3.6 - - - -
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Residues in contact with SER 29 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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25c LEU 2.8 12.2 + - - -
26c GLN* 3.2 18.9 + - - +
27c ASN 4.3 3.5 - - - +
28c ARG* 1.3 73.7 - - - +
30c ARG* 1.3 68.8 + - - +
31c ILE* 3.6 1.4 + - - +
47c ILE* 4.0 11.9 - - - -
48c ILE 5.0 8.5 - - - -
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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