Contacts of the helix formed by residues 171 - 175 (chain P) in PDB entry 3PP4
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 ASN 171 (chain P).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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37L TYR* 3.4 28.7 + - + -
96L ASN* 2.8 35.6 + - - +
97L LEU* 3.9 9.0 - - + +
169P PRO* 3.2 14.3 - - - +
170P ALA* 1.3 78.5 - - - +
172P PRO* 1.3 75.4 - - + +
173P SER* 2.9 28.5 + - - +
174P GLU* 3.0 31.5 + - - +
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Residues in contact with PRO 172 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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50H ARG* 2.9 29.1 + - - +
96L ASN 3.5 8.1 - - - +
97L LEU 3.3 15.9 - - - +
98L GLU* 4.2 2.0 - - - -
99L LEU* 3.8 42.0 - - + +
101L TYR* 3.6 11.9 - - + +
169P PRO* 5.8 0.4 - - + -
171P ASN* 1.3 89.8 - - + +
173P SER* 1.3 54.6 + - - +
174P GLU 3.1 4.8 + - - -
175P LYS* 3.2 15.8 + - + +
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Residues in contact with SER 173 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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50H ARG* 4.8 0.2 - - - -
99H ASN* 2.8 40.9 + - - -
101H PHE* 3.2 8.8 - - - -
103H GLY* 5.6 0.7 - - - -
105H TRP* 3.8 10.8 - - - +
225H CL 3.8 8.7 - - - -
37L TYR* 5.7 0.2 - - - -
39L TYR* 5.0 0.3 + - - -
96L ASN* 3.1 11.0 + - - -
101L TYR* 3.3 15.8 + - - -
171P ASN* 2.9 26.2 + - - +
172P PRO* 1.3 77.2 - - - +
174P GLU* 1.3 69.0 + - - +
175P LYS 3.5 0.4 - - - -
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Residues in contact with GLU 174 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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100H VAL 4.6 1.0 - - - +
101H PHE* 3.5 4.2 - - - -
102H ASP* 2.8 25.7 + - - -
103H GLY* 2.8 30.7 + - - -
105H TRP 5.4 0.2 + - - -
37L TYR* 5.9 0.7 - - + -
169P PRO* 3.6 21.1 - - + +
170P ALA* 4.6 4.9 - - + +
171P ASN* 3.0 26.4 + - - +
173P SER* 1.3 93.2 + - - +
175P LYS* 1.3 65.9 + - - +
176P ASN 3.2 0.9 + - - -
177P SER* 3.0 37.7 + - - +
179P SER* 6.0 0.7 - - - -
180P THR* 3.6 2.8 + - - +
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Residues in contact with LYS 175 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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33H TRP* 2.8 44.6 + - + -
50H ARG* 3.9 8.5 - - - +
57H ASP* 3.5 24.6 + - - -
59H ASP* 4.9 10.1 + - - -
101H PHE* 3.2 7.8 - - - -
169P PRO* 3.8 18.5 - - + +
172P PRO* 3.2 19.0 + - + +
173P SER 3.5 0.2 - - - -
174P GLU* 1.3 75.9 - - - +
176P ASN* 1.3 74.5 + - - +
177P SER 3.2 0.2 - - - -
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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