Contacts of the helix formed by residues 160 - 164 (chain B) in PDB entry 3AP1
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 PRO 160 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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1B A3P 5.3 0.4 - - - +
74B GLY* 3.4 12.3 - - - -
75B GLY 3.0 40.4 + - - +
77B PRO* 3.8 23.3 - - + -
81B THR* 3.9 17.3 - - + +
99B GLU* 3.5 20.6 - - - +
104B PRO* 6.2 0.4 - - + -
158B LYS* 3.8 4.9 - - + -
159B ASP* 1.3 84.1 - - + +
161B PHE* 1.3 61.7 + - - +
162B THR 3.3 0.7 + - - -
163B LEU* 3.5 4.9 + - - +
221B MET* 4.2 0.5 - - - +
1006T TYR* 3.5 29.6 - - + +
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Residues in contact with PHE 161 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
76B VAL* 4.8 0.7 - - + -
77B PRO* 3.5 34.5 - - + -
104B PRO* 4.6 6.7 - - + +
159B ASP* 3.0 3.0 + - - +
160B PRO* 1.3 72.7 - - + +
162B THR* 1.3 63.8 + - - +
163B LEU 3.0 3.1 - - - -
164B LYS* 3.0 38.3 + - + +
199B ILE* 3.7 28.5 - - + -
202B PHE* 4.4 12.6 - + - -
217B ALA* 4.2 17.0 - - + -
221B MET* 3.5 24.5 - - + -
1006T TYR* 4.0 12.1 - + + -
1007T GLU 3.7 19.5 - - - +
1008T PHE* 3.7 32.5 - - + -
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Residues in contact with THR 162 (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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72B PHE* 4.8 8.4 - - + -
73B VAL 4.0 3.5 + - - -
103B ILE* 3.8 16.2 - - + -
104B PRO* 4.3 7.4 - - + +
107B LEU* 3.8 26.7 - - + -
157B ASN* 4.4 5.5 + - - +
159B ASP* 2.8 39.8 + - + +
161B PHE* 1.3 76.4 - - - +
163B LEU* 1.3 72.5 + - - +
164B LYS 3.2 0.4 - - - -
165B SER* 2.9 18.5 + - - +
166B SER 3.7 0.2 + - - -
169B LEU* 3.4 23.1 - - + +
1008T PHE* 5.0 1.1 - - - -
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Residues in contact with LEU 163 (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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72B PHE* 3.9 18.8 - - + +
73B VAL 3.7 4.3 - - - -
74B GLY* 3.5 28.9 - - - +
75B GLY 4.0 7.0 - - - +
160B PRO 3.5 9.3 + - - +
161B PHE 3.0 1.4 - - - -
162B THR* 1.3 92.6 + - - +
164B LYS* 1.3 58.6 + - - +
165B SER 3.1 5.1 + - - -
166B SER* 3.7 21.1 + - - +
178B PHE* 4.0 28.0 - - + -
179B LEU 3.9 12.6 - - - +
180B LEU* 4.0 21.3 - - + -
221B MET* 3.7 27.7 - - + +
224B GLN* 4.1 0.9 - - - +
233B CYS* 4.6 3.1 - - - -
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Residues in contact with LYS 164 (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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111B GLN* 3.8 10.3 + - - +
161B PHE* 3.0 32.8 + - + +
163B LEU* 1.3 76.4 - - - +
165B SER* 1.3 58.2 + - - +
166B SER 3.7 0.7 - - - -
216B LYS* 5.7 4.2 - - - +
217B ALA* 4.7 14.2 - - - +
220B VAL* 4.2 35.8 - - + +
221B MET* 3.8 25.5 - - + +
224B GLN* 3.5 18.7 + - - +
1008T PHE* 3.6 27.6 - - + +
1009T ASP* 2.7 35.9 + - - +
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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