Contacts of the strand formed by residues 121 - 127 (chain C) in PDB entry 2NRA
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 121 (chain C).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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84C LEU* 3.5 44.2 + - + +
85C GLY* 4.5 10.1 + - - +
87C SER 4.7 1.4 + - - -
119C ASN* 3.2 19.1 + - - +
120C ILE* 1.3 112.0 - - + +
122C GLU* 1.3 62.7 + - - +
123C TRP* 3.3 29.6 - - - +
124C ILE* 3.9 19.7 - - + -
135C LEU* 4.4 15.5 - - + -
136C LYS 3.8 6.7 - - - +
137C PHE* 4.4 6.5 - - + -
138C THR* 3.6 3.8 - - - +
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Residues in contact with GLU 122 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
117C ASP* 5.7 1.3 - - - +
121C ILE* 1.3 74.3 - - - +
123C TRP* 1.3 64.9 - - - +
136C LYS* 2.8 36.8 + - + +
137C PHE 3.7 13.5 - - - +
138C THR* 3.4 22.7 - - + +
139C ARG 5.6 0.2 - - - +
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Residues in contact with TRP 123 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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54C VAL* 4.3 16.2 - - + -
121C ILE* 3.3 10.2 - - - +
122C GLU* 1.3 86.8 - - - +
124C ILE* 1.3 75.7 + - - +
125C ALA* 3.8 25.4 - - + +
134C SER* 4.0 26.5 - - - -
135C LEU* 3.4 4.3 - - - -
136C LYS* 2.8 52.3 + - + +
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Residues in contact with ILE 124 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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81C GLY* 3.4 39.3 - - - +
82C LYS* 6.1 0.2 - - - -
84C LEU* 4.4 12.6 - - + -
85C GLY* 4.3 14.4 - - - +
121C ILE* 3.9 18.8 - - + -
123C TRP* 1.3 89.8 + - - +
125C ALA* 1.3 67.9 + - - +
133C LEU* 3.7 18.4 - - + -
134C SER 3.3 14.6 - - - +
135C LEU* 4.7 10.5 - - + -
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Residues in contact with ALA 125 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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123C TRP* 3.8 26.0 - - + +
124C ILE* 1.3 78.4 - - - +
126C TYR* 1.3 66.5 + - - +
127C SER* 4.4 1.7 + - - -
133C LEU* 3.4 5.1 - - - -
134C SER* 2.7 38.1 + - - -
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Residues in contact with TYR 126 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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26B C 2.4 42.8 + - - -
59C ALA* 5.0 0.2 - - - +
74C TYR* 3.6 18.2 - - - +
77C LEU* 3.9 20.0 - - + -
78C LYS* 3.8 59.0 - - + +
125C ALA* 1.3 82.9 - - - +
127C SER* 1.3 85.8 + - - +
128C PRO* 3.7 17.0 - - + +
131C GLY* 3.7 4.3 - - - -
132C TYR 3.5 18.2 - - - -
133C LEU* 3.4 17.1 - - + +
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Residues in contact with SER 127 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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125C ALA 4.4 2.9 + - - -
126C TYR* 1.3 84.6 + - - +
128C PRO* 1.3 71.9 - - - +
129C ASP 3.2 1.8 - - - -
130C GLU* 3.0 33.0 + - - +
131C GLY 3.8 1.2 + - - -
132C TYR* 3.0 43.7 + - - +
134C SER* 4.7 0.5 + - - -
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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