Contacts of the helix formed by residues 104 - 108 (chain A) in PDB entry 1PS9
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 THR 104 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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65A GLY 2.8 15.6 + - - +
66A VAL 2.6 25.6 + - - +
67A GLY* 3.9 4.9 - - - -
102A LEU* 4.2 4.9 - - + -
103A HIS* 1.3 72.0 + - - +
105A GLY* 1.3 65.4 + - - +
106A ARG 3.3 0.3 + - - -
107A TYR* 2.8 21.8 + - - +
108A SER* 2.8 22.6 - - - -
166A TYR* 3.4 30.4 - - + -
167A LEU 3.9 1.6 - - - -
170A GLU* 3.9 2.3 - - - +
704A MDE 3.1 29.4 - - + +
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Residues in contact with GLY 105 (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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103A HIS* 2.9 23.4 + - - -
104A THR* 1.3 76.6 + - - +
106A ARG* 1.3 57.4 + - - -
107A TYR 2.8 6.4 + - - -
108A SER* 3.3 17.3 + - - -
113A LEU* 3.8 4.2 - - - +
114A VAL 3.3 22.0 + - - +
167A LEU* 3.8 13.7 - - - -
170A GLU* 3.8 4.0 - - - -
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Residues in contact with ARG 106 (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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105A GLY* 1.3 68.4 - - - -
107A TYR* 1.3 57.5 + - + +
108A SER 3.6 0.2 - - - -
113A LEU* 3.4 13.1 - - + +
114A VAL 3.6 3.1 + - - -
115A ALA* 3.9 13.9 - - + -
119A LEU* 3.0 35.5 + - - +
120A GLN 3.2 13.1 + - - -
121A ALA* 3.7 17.5 + - + +
122A PRO* 3.8 4.0 - - - +
124A ASN* 2.6 31.0 + - - +
126A PHE 5.3 0.2 - - - +
128A PRO* 4.1 11.2 - - + +
165A GLY 5.4 0.2 + - - -
170A GLU* 3.1 33.1 + - - +
175A ARG* 4.1 8.1 + - - +
176A THR* 3.5 32.3 - - - +
251A TRP* 4.0 2.4 - - - -
253A GLU* 2.5 42.8 + - - -
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Residues in contact with TYR 107 (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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104A THR* 2.8 13.0 + - - +
106A ARG* 1.3 88.3 - - + +
108A SER* 1.3 68.1 + - - +
109A TYR* 3.3 24.7 + - + +
121A ALA* 4.0 13.0 - - + -
123A ILE* 3.8 15.9 - - + -
124A ASN* 3.6 7.8 + - + +
164A GLU 3.3 21.1 - - - -
165A GLY 3.5 15.9 - - - -
166A TYR* 3.6 33.2 - + + -
251A TRP* 3.8 6.4 - - - -
252A HIS* 3.6 22.2 + + + -
253A GLU* 2.6 57.6 + - + +
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Residues in contact with SER 108 (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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64A THR 3.9 7.8 + - - -
66A VAL 3.0 14.6 - - - -
67A GLY 3.5 6.7 - - - -
104A THR* 2.8 27.0 + - - -
105A GLY 3.3 4.9 + - - -
107A TYR* 1.3 77.1 - - - +
109A TYR* 1.3 58.4 + - - +
110A GLN* 2.8 23.9 + - - +
113A LEU* 3.1 27.2 - - - +
124A ASN* 3.2 15.1 + - - +
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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