Contacts of the helix formed by residues 27 - 33 (chain A) in PDB entry 5X11
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 LYS 27 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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23A THR* 3.4 20.4 + - + +
24A SER* 2.8 13.2 + - - +
26A PHE* 1.3 76.8 - - + +
28A GLU* 1.3 66.5 + - + +
31A GLY* 5.2 0.4 - - - -
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Residues in contact with GLU 28 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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24A SER* 3.1 12.8 + - - +
25A TYR* 3.1 18.3 + - + +
27A LYS* 1.3 84.2 - - + +
29A GLU* 1.3 75.5 + - - +
30A LEU 3.2 2.2 - - - -
31A GLY* 2.9 20.6 + - - -
32A GLN* 4.4 1.9 + - - +
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Residues in contact with GLU 29 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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25A TYR* 4.9 3.6 - - - -
28A GLU* 1.3 89.1 - - - +
30A LEU* 1.3 61.5 + - - +
31A GLY 3.3 0.5 + - - -
32A GLN* 3.4 25.1 + - + +
154A HIS* 3.0 54.2 + - + +
157A VAL* 3.7 27.0 - - + +
158A LEU* 4.6 11.7 - - + -
103B TYR* 2.7 26.8 + - + -
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Residues in contact with LEU 30 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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11A LEU* 3.9 19.1 - - + -
25A TYR* 3.7 12.7 + - + +
26A PHE* 4.0 22.0 - - + -
28A GLU 3.1 0.8 + - - -
29A GLU* 1.3 78.4 - - - +
31A GLY* 1.3 56.6 + - - +
32A GLN 3.0 11.1 + - - -
33A PHE* 3.0 17.4 + - + +
34A TRP* 3.2 21.4 + - + +
157A VAL* 4.9 6.7 - - + -
100B LEU* 3.8 31.6 - - + -
103B TYR* 3.7 52.7 - - + +
104B PHE* 4.9 0.7 - - + -
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Residues in contact with GLY 31 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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25A TYR 4.1 0.2 + - - -
26A PHE 3.1 26.1 + - - -
27A LYS 5.2 0.2 - - - -
28A GLU 2.9 11.2 + - - -
30A LEU* 1.3 76.9 - - - +
32A GLN* 1.3 60.7 + - - +
33A PHE 3.2 0.9 - - - -
34A TRP 3.4 10.3 + - - -
92B GLU* 3.8 4.0 - - - +
93B THR* 2.8 32.2 + - - -
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Residues in contact with GLN 32 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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28A GLU 4.4 1.4 + - - +
29A GLU* 3.6 19.9 - - - +
30A LEU 3.0 0.8 + - - -
31A GLY* 1.3 78.0 - - - +
33A PHE* 1.3 78.0 + - + +
127A LYS* 3.2 31.3 + - - +
131A LEU* 4.4 15.7 - - + +
157A VAL 5.2 0.4 - - - +
158A LEU* 6.2 1.3 - - + -
161A ALA* 3.8 19.8 - - + +
164A ARG* 2.8 45.5 + - - +
165A GLU* 5.0 0.2 - - - +
92B GLU* 3.9 12.9 + - - +
94B VAL 3.3 10.8 + - - -
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Residues in contact with PHE 33 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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30A LEU* 3.0 9.6 + - + +
31A GLY 3.2 0.2 - - - -
32A GLN* 1.3 92.9 - - + +
34A TRP* 1.3 63.9 + - - +
157A VAL* 3.4 38.6 - - + -
160A LYS* 3.5 30.1 - - + -
161A ALA* 3.7 15.0 - - - -
164A ARG* 3.0 31.9 - - - -
93B THR* 3.9 6.3 - - - -
94B VAL 3.7 8.7 - - - -
95B LYS* 3.2 4.6 - - - -
96B ASP* 3.0 36.0 + - + +
99B MET* 3.7 35.7 - - + -
100B LEU 4.9 3.6 - - - +
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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