Contacts of the strand formed by residues 157 - 161 (chain A) in PDB entry 2H18
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 157 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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111A LEU* 4.6 0.7 - - + -
115A LEU* 4.6 2.5 - - + -
125A VAL* 3.3 32.5 - - + +
127A VAL* 3.9 4.5 - - + -
149A LEU* 3.8 36.6 - - + +
152A ILE* 3.7 57.2 - - + +
155A ARG 3.4 2.4 + - - +
156A GLU* 1.3 78.9 - - - +
158A CYS* 1.3 68.6 + - - +
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Residues in contact with CYS 158 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
125A VAL 2.9 5.5 + - - +
126A LEU* 3.4 9.8 - - + -
127A VAL* 2.8 28.6 + - - +
149A LEU* 5.2 0.7 - - - -
156A GLU* 5.6 2.2 - - + +
157A ILE* 1.3 77.1 - - - +
159A CYS* 1.3 71.8 + - - +
160A TYR* 3.5 36.3 - - - -
176A TRP* 3.4 27.8 - - + +
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Residues in contact with CYS 159 (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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127A VAL* 3.2 22.0 - - + +
140A GLU* 3.7 30.2 - - - +
143A LEU* 3.9 33.0 - - - -
144A ILE* 3.7 26.3 - - + +
149A LEU* 3.8 10.5 - - + -
158A CYS* 1.3 80.2 - - - +
160A TYR* 1.3 73.9 + - - +
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Residues in contact with TYR 160 (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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126A LEU* 3.7 18.3 - - + +
127A VAL 2.9 6.5 + - - -
128A LEU* 3.3 12.9 - - + -
129A GLY* 2.8 30.9 + - - -
140A GLU* 4.4 4.0 - - + -
158A CYS* 3.5 21.5 - - - -
159A CYS* 1.3 84.8 - - - +
161A SER* 1.3 58.3 + - - +
162A ILE* 3.9 8.7 + - + +
172A ILE* 3.4 52.7 + - + +
173A THR* 3.8 17.5 - - - -
176A TRP* 3.6 24.0 - + + +
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Residues in contact with SER 161 (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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129A GLY* 3.6 8.8 + - - +
132A ARG* 3.1 32.1 - - - +
138A LEU 4.5 4.6 + - - -
139A ASP* 4.5 5.9 - - - +
140A GLU* 3.8 36.2 + - - +
143A LEU* 5.1 0.9 - - - -
160A TYR* 1.3 71.8 - - - +
162A ILE* 1.3 56.9 + - - +
168A ASP* 5.4 1.3 - - - +
169A ASN* 2.7 37.4 + - - +
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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