Contacts of the strand formed by residues 118 - 121 (chain B) in PDB entry 2PI8
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 TYR 118 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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115B GLU 3.8 15.9 - - - -
116B PHE 3.8 0.6 - - - -
117B GLN* 1.3 91.5 - - + +
119B PRO* 1.3 64.1 - - + +
120B ILE* 4.1 0.3 - - - +
148B ALA 3.8 0.3 - - - +
149B TYR* 3.3 3.0 - - - +
150B SER* 2.8 48.0 + - - +
151B ASN 3.9 11.2 - - - -
152B SER* 3.5 17.7 - - - +
153B LEU* 3.9 26.2 - - + -
156B ASN* 3.2 24.0 + - - +
220B GLU* 2.8 44.7 + - + +
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Residues in contact with PRO 119 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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112B ARG* 4.0 9.2 - - - +
117B GLN 3.3 9.9 - - - +
118B TYR* 1.3 86.2 - - + +
120B ILE* 1.3 60.1 + - - +
121B TYR* 3.6 40.7 - - + +
146B ILE* 3.8 15.9 - - + -
148B ALA 3.3 8.5 - - - +
149B TYR* 3.5 22.7 - - + -
153B LEU* 6.4 0.7 - - + -
156B ASN* 3.7 9.0 + - - +
233B PHE* 4.9 4.3 - - - -
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Residues in contact with ILE 120 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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106B ILE* 4.8 0.9 - - + -
108B ALA* 4.8 2.0 - - + -
118B TYR 4.1 1.6 - - - +
119B PRO* 1.3 75.3 - - - +
121B TYR* 1.3 58.3 + - - +
146B ILE* 3.6 0.8 - - - -
147B LEU* 2.7 35.2 + - - +
148B ALA* 2.8 30.4 + - + +
150B SER* 4.4 10.5 - - - -
156B ASN* 3.9 28.3 - - - +
159B MSE 3.9 11.2 - - + -
167B ILE* 3.8 27.1 - - + -
178B PHE* 3.8 17.9 - - + -
233B PHE* 5.7 1.1 - - - -
236B PHE* 3.8 27.8 - - + -
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Residues in contact with TYR 121 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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119B PRO* 3.6 38.5 - - + +
120B ILE* 1.3 76.9 - - - +
122B ARG* 1.3 61.0 + - - +
136B ILE* 3.7 30.9 + - + -
137B TYR* 6.3 0.7 - + - -
139B GLY* 5.4 3.1 - - - -
141B LEU* 3.8 36.9 + - + -
142B SER 4.2 4.5 - - - -
145B TYR* 3.3 18.6 - - + +
146B ILE* 3.5 23.3 - - + +
147B LEU* 4.0 4.4 - - - +
233B PHE* 3.7 25.0 - + + -
234B VAL 4.5 0.7 - - - +
235B PHE* 3.7 23.1 - - + -
236B PHE* 3.1 26.8 + - - -
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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