Contacts of the strand formed by residues 169 - 172 (chain A) in PDB entry 1CEC
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 LEU 169 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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135A PHE* 3.3 24.9 - - + +
137A LEU* 4.2 6.3 - - + -
157A ILE* 3.7 34.8 - - + -
160A ILE* 3.9 33.9 - - + -
161A ARG* 3.9 22.4 - - - +
167A MET* 3.8 11.7 - - + +
168A TRP* 1.3 79.9 - - - +
170A TYR* 1.3 62.0 + - - +
171A ILE* 3.8 7.2 - - + -
192A TYR 3.0 6.1 + - - -
193A ILE* 3.3 17.6 - - + +
194A VAL 2.9 24.9 + - - +
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Residues in contact with TYR 170 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
4A PHE* 3.6 30.0 - - - +
86A VAL* 4.4 12.3 - - + -
134A ALA* 3.5 28.4 - - + +
135A PHE 2.7 18.0 + - - +
136A GLU* 3.4 22.1 - - + +
137A LEU* 3.3 23.7 + - - +
138A LEU 5.1 0.7 + - - -
168A TRP* 4.3 7.9 - + + -
169A LEU* 1.3 77.4 - - - +
171A ILE* 1.3 61.0 + - - +
172A GLY 4.3 0.5 + - - -
194A VAL* 3.2 38.2 - - + +
196A ASN* 4.9 5.2 - - + -
277A TYR* 3.4 52.5 - + + -
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Residues in contact with ILE 171 (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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137A LEU* 4.1 19.7 - - + -
138A LEU 6.4 0.2 - - - +
149A TRP* 4.7 2.7 - - + -
153A MET* 4.1 25.8 - - + -
157A ILE* 3.5 18.8 - - + -
169A LEU* 3.8 10.5 - - + -
170A TYR* 1.3 75.2 - - - +
172A GLY* 1.3 69.1 + - - +
182A LEU* 4.5 0.2 - - - +
185A LEU* 4.1 16.7 - - + +
188A ILE* 4.2 8.1 - - + -
193A ILE* 3.4 44.6 - - + -
194A VAL 2.9 10.5 + - - +
195A TYR* 3.3 13.6 - - + +
196A ASN* 2.9 23.9 + - - +
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Residues in contact with GLY 172 (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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136A GLU* 6.1 0.6 - - - +
138A LEU 5.1 4.0 + - - +
149A TRP* 2.9 28.4 + - - -
170A TYR 4.3 1.2 + - - -
171A ILE* 1.3 75.2 - - - +
173A GLY* 1.3 58.4 + - - +
177A ASN* 3.3 24.5 + - - +
185A LEU* 3.7 7.9 - - - +
196A ASN* 3.5 18.1 - - - +
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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