Contacts of the helix formed by residues 100 - 107 (chain A) in PDB entry 3NIA
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 SER 100 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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96A ILE* 4.3 10.3 - - - -
97A VAL 2.8 31.6 + - - -
99A TRP* 1.3 73.8 - - - +
101A PRO* 1.3 66.6 - - - +
103A THR* 3.9 11.2 - - - -
104A GLU* 3.0 22.5 + - - +
126A ASP* 3.2 16.4 - - - -
128A GLY* 2.9 23.5 + - - -
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Residues in contact with PRO 101 (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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99A TRP* 3.4 48.5 - - + +
100A SER* 1.3 88.5 - - - +
102A ALA* 1.3 61.3 + - - +
104A GLU* 4.0 3.8 - - + +
105A ARG* 3.3 49.8 + - - +
124A LEU* 4.0 19.7 - - + -
126A ASP* 3.6 8.7 - - + +
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Residues in contact with ALA 102 (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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101A PRO* 1.3 74.4 - - - +
103A THR* 1.3 65.5 + - - +
104A GLU 3.1 0.2 - - - -
105A ARG* 3.0 13.2 + - - +
106A PHE* 2.9 36.9 + - + -
112A MET* 4.1 9.2 - - + -
120A ALA* 3.8 24.5 - - + -
124A LEU* 4.1 11.2 - - + -
126A ASP* 2.7 15.9 + - - +
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Residues in contact with THR 103 (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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91A TYR* 2.7 47.6 + - + -
95A MET* 4.4 5.4 - - + -
96A ILE* 3.4 21.8 - - + -
100A SER* 3.4 7.4 + - - -
102A ALA* 1.3 76.1 - - - +
104A GLU* 1.3 62.4 + - - +
107A LEU* 3.1 11.8 + - - +
112A MET* 3.8 7.0 - - - -
126A ASP* 2.7 28.9 + - - -
128A GLY* 4.4 12.1 - - - -
129A ALA* 3.0 16.1 + - - +
132A LEU* 5.6 1.1 - - + -
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Residues in contact with GLU 104 (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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96A ILE* 3.7 32.9 - - + +
100A SER* 3.0 17.5 + - - +
101A PRO* 4.0 4.7 - - + +
103A THR* 1.3 78.7 - - - +
105A ARG* 1.3 63.8 + - + +
107A LEU* 3.3 29.4 + - - +
108A ALA 4.7 0.9 + - - -
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Residues in contact with ARG 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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101A PRO* 3.3 38.2 + - - +
102A ALA* 3.0 13.8 + - - +
104A GLU* 1.3 80.8 - - + +
106A PHE* 1.3 67.3 + - + +
107A LEU 3.6 0.3 + - - -
108A ALA* 4.5 6.2 + - - +
109A SER* 5.3 0.5 + - - -
124A LEU* 4.4 11.3 - - - +
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Residues in contact with PHE 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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91A TYR* 3.3 17.1 + - - +
102A ALA* 2.9 30.4 + - + +
105A ARG* 1.3 80.8 - - + +
107A LEU* 1.3 63.5 - - - +
108A ALA 3.3 2.0 - - - -
109A SER* 2.7 36.9 + - - -
110A GLY 3.2 3.8 + - - -
111A HIS 3.7 7.6 + - - +
112A MET* 3.6 34.8 - - + -
116A GLU* 4.2 26.7 - - + -
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Residues in contact with LEU 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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91A TYR* 3.7 22.6 - - + +
92A GLY* 3.6 33.9 - - - +
93A PRO* 3.9 15.7 - - + -
96A ILE* 4.4 9.9 - - + -
103A THR 3.1 12.3 + - - +
104A GLU* 3.3 37.7 + - - +
106A PHE* 1.3 77.3 - - - +
108A ALA* 1.3 65.6 + - - +
110A GLY* 2.9 17.0 + - - -
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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