Contacts of the strand formed by residues 140 - 144 (chain C) in PDB entry 1IXR
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 140 (chain C).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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36C GLU 3.5 7.9 - - - +
37C PRO* 4.2 0.2 - - + -
38C LEU* 3.2 62.4 - - + +
40C HIS* 6.1 0.2 - - - -
62C LEU* 5.2 1.5 - - + +
64C VAL* 6.2 0.2 - - + -
91C GLY* 4.2 8.5 + - - +
92C ASP 3.6 2.6 + - - -
93C ILE* 2.8 43.6 - - - +
94C LEU 2.9 10.7 + - - -
139C PHE* 1.3 80.0 - - - +
141C LEU* 1.3 61.0 + - - +
142C ILE* 5.7 3.1 - - - -
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Residues in contact with LEU 141 (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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38C LEU 5.0 0.4 + - - -
39C GLU 4.7 0.2 - - - +
40C HIS* 3.4 38.5 + - + +
41C LEU 2.8 27.4 + - - -
84C LEU* 6.4 0.2 - - + -
94C LEU* 3.4 12.8 - - + +
96C ILE* 4.2 17.3 - - + -
110C LEU* 3.6 28.9 - - + -
113C ALA* 5.8 0.4 - - + -
139C PHE* 4.1 17.8 + - + +
140C THR* 1.3 73.6 - - - +
142C ILE* 1.3 76.4 + - - +
143C GLY* 3.4 1.8 - - - +
159C PHE* 3.3 33.0 - - + -
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Residues in contact with ILE 142 (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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38C LEU* 6.1 4.7 - - + -
39C GLU 5.8 0.2 - - - +
41C LEU* 3.2 46.4 - - + +
43C LEU* 4.1 18.6 - - + -
51C LYS 5.6 0.2 - - - +
54C LEU* 6.3 0.4 - - + -
55C ALA* 4.0 21.1 - - + -
58C ILE* 5.2 2.0 - - + -
93C ILE* 3.8 22.0 - - + -
94C LEU 2.9 8.8 + - - +
95C PHE* 3.0 37.9 - - + -
96C ILE 2.5 34.1 + - - -
140C THR* 5.5 3.1 - - - +
141C LEU* 1.3 78.4 - - - +
143C GLY* 1.3 51.8 + - - +
144C ALA 3.9 0.2 - - - -
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Residues in contact with GLY 143 (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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41C LEU 3.1 7.7 + - - -
42C LEU* 2.7 39.3 - - - +
43C LEU 4.1 0.2 - - - -
96C ILE 3.2 10.3 - - - -
99C ILE* 3.6 12.1 - - - -
141C LEU* 3.4 5.4 - - - +
142C ILE* 1.3 73.2 - - - +
144C ALA* 1.3 58.9 + - - -
159C PHE* 3.5 15.1 - - - -
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Residues in contact with ALA 144 (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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43C LEU* 3.6 27.1 - - + +
51C LYS* 3.8 16.4 - - + +
95C PHE* 3.8 27.8 - - + -
96C ILE 3.2 4.9 + - - -
97C ASP* 4.7 4.7 - - - +
98C GLU 3.3 18.5 + - - -
99C ILE* 3.3 12.8 - - - +
142C ILE* 3.9 2.2 - - - +
143C GLY* 1.3 73.7 - - - +
145C THR* 1.3 62.4 + - - +
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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