Contacts of the strand formed by residues 23 - 27 (chain X) in PDB entry 3EXG
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 VAL 23 (chain X).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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154W TYR* 4.2 0.2 - - - -
16X GLU* 4.1 11.9 - - - +
17X LEU* 3.2 26.3 - - + +
20X ASP* 3.7 27.1 - - + +
21X GLU 3.3 1.4 - - - -
22X LYS* 1.3 77.4 - - - +
24X PHE* 1.3 60.0 + - - +
51X ARG* 3.0 25.2 + - - +
75X ARG* 3.4 28.9 - - + +
77X ILE* 3.8 23.6 - - + -
161X ILE* 4.3 16.8 - - + -
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Residues in contact with PHE 24 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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150W LEU* 4.0 20.9 - - + -
154W TYR* 4.1 20.6 - + - +
17X LEU* 4.3 2.7 - - - -
22X LYS 4.1 8.1 - - - -
23X VAL* 1.3 77.1 - - - +
25X LEU* 1.3 61.7 + - - +
26X LEU* 4.3 17.5 - - + -
50X LYS 4.4 1.8 - - - +
51X ARG* 3.3 24.0 - - - +
53X ILE* 3.8 18.8 - - + -
66X ALA* 5.2 1.8 - - - -
69X ALA* 4.0 15.7 - - + -
74X LEU* 4.0 26.5 - - + -
75X ARG 3.6 2.0 + - - -
76X PRO* 3.4 31.0 - - + -
77X ILE* 2.6 41.0 + - - +
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Residues in contact with LEU 25 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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13X MET* 4.2 15.7 - - + -
17X LEU* 5.6 3.6 - - + -
24X PHE* 1.3 77.6 - - - +
26X LEU* 1.3 67.5 + - - +
30X VAL* 4.1 18.1 - - + +
40X SER* 4.0 26.7 - - - -
43X LEU* 4.3 8.7 - - + -
51X ARG 2.9 8.7 + - - +
52X ILE* 3.8 19.0 - - + +
53X ILE* 3.0 24.8 + - - +
77X ILE* 3.3 39.0 - - + +
79X GLU* 4.1 16.2 - - + +
115X ARG* 4.5 5.2 - - - +
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Residues in contact with LEU 26 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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150W LEU* 5.4 1.8 - - + -
185W TRP* 4.8 6.5 - - + -
24X PHE* 4.3 20.6 - - + -
25X LEU* 1.3 76.9 - - - +
27X GLY* 1.3 58.8 - - - +
30X VAL* 4.3 4.3 - - - -
53X ILE* 3.3 21.8 - - + +
55X THR* 3.9 17.0 - - + -
62X PHE* 4.0 26.5 - - + +
65X ILE* 4.7 9.9 - - + -
66X ALA* 4.0 16.8 - - + +
76X PRO* 4.9 0.4 - - + -
77X ILE 2.9 11.4 + - - +
78X CYS* 3.6 27.9 - - + +
79X GLU* 2.8 27.5 + - - +
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Residues in contact with GLY 27 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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26X LEU* 1.3 78.1 - - - +
28X GLU* 1.3 66.3 + - - -
29X GLU 3.6 1.0 + - - -
30X VAL* 3.8 9.2 - - - +
53X ILE 3.2 7.5 + - - +
54X ASP* 3.6 1.4 - - - -
55X THR* 2.8 35.0 + - - +
62X PHE* 4.1 7.2 - - - -
79X GLU 3.7 13.2 - - - -
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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