Contacts of the helix formed by residues 99 - 102 (chain D) in PDB entry 1XBT
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 GLY 99 (chain D).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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96D ILE* 4.0 10.5 - - - -
97D ASP 3.4 1.4 - - - -
98D GLU* 1.3 74.5 - - - +
100D GLN* 1.3 62.6 + - - +
101D PHE 3.1 1.3 + - - -
102D PHE* 3.3 19.6 + - - +
105D ILE* 3.8 32.6 - - - +
121D VAL* 4.1 6.5 - - - -
122D ALA 3.0 13.0 + - - -
123D ALA* 3.9 0.4 - - - +
136D ILE* 4.2 7.0 - - - -
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Residues in contact with GLN 100 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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98D GLU* 3.3 18.6 - - - +
99D GLY* 1.3 77.0 - - - +
101D PHE* 1.3 81.5 + - + +
102D PHE 3.4 4.3 + - - +
105D ILE* 5.9 0.2 - - - -
123D ALA* 3.3 9.9 - - - +
124D LEU* 3.1 54.0 + - - +
133D PHE* 3.6 57.3 - - + +
134D GLY* 4.4 8.1 - - - -
135D ALA 5.0 1.4 + - - -
136D ILE* 4.2 11.9 - - + +
4195D TTP 3.9 7.3 + - - -
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Residues in contact with PHE 101 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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55D TYR* 3.5 49.7 + + + -
58D ASP* 4.8 0.7 - - - -
79D CYS 4.5 0.7 - - - +
98D GLU* 3.2 31.8 + - + +
99D GLY 3.1 1.2 - - - -
100D GLN* 1.3 90.3 - - - +
102D PHE* 1.3 63.2 + - + +
103D PRO* 3.5 9.0 - - - +
133D PHE* 3.8 25.6 - + - -
173D GLU* 3.6 42.6 - - + -
175D ILE* 4.8 5.2 - - + -
4195D TTP 3.3 38.4 - - - -
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Residues in contact with PHE 102 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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53D ILE* 4.1 4.3 - - + -
54D LYS 3.9 5.8 - - - -
55D TYR* 3.8 20.9 - + + -
78D ALA* 3.3 36.8 - - + -
79D CYS* 3.6 18.6 - - - -
80D LEU 4.1 0.2 - - - -
81D LEU* 3.6 39.0 - - + -
96D ILE* 3.9 21.8 - - + -
97D ASP 3.9 20.6 - - - -
98D GLU 3.9 11.2 - - - -
99D GLY 3.3 9.6 + - - +
100D GLN 4.4 3.5 - - - +
101D PHE* 1.3 76.8 - - - +
103D PRO* 1.3 70.0 - - - +
104D ASP* 3.3 9.9 + - - +
105D ILE* 3.3 21.1 + - + +
135D ALA* 5.4 2.1 + - - +
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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