Contacts of the strand formed by residues 218 - 220 (chain P) in PDB entry 3L75
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 LYS 218 (chain P).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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23P PRO* 3.8 24.2 + - + -
24P ALA 3.3 12.1 - - - +
25P PRO* 3.8 16.7 - - - +
204P SER 5.3 5.3 + - - -
205P GLY* 5.5 1.8 - - - -
206P SER 4.6 6.3 + - - +
214P SER* 3.1 30.1 + - - +
215P ASP* 3.1 33.9 + - - +
216P SER 4.2 0.2 - - - -
217P ASP* 1.3 76.6 - - - +
219P ILE* 1.3 71.0 + - - +
4T PHE* 3.7 26.5 - - + -
7T LEU* 3.8 20.6 - - + -
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Residues in contact with ILE 219 (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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433N ASP* 5.6 3.6 - - + -
24P ALA* 2.8 37.7 + - - +
26P SER* 3.8 22.0 - - - -
217P ASP* 4.9 3.1 - - - +
218P LYS* 1.3 82.4 - - - +
220P PRO* 1.3 75.9 - - + +
221P PHE 3.4 0.2 + - - -
224P TYR* 3.6 33.0 - - + -
225P TYR* 3.7 23.3 - - + -
227Q TRP* 3.9 4.7 - - + -
230Q LEU* 3.7 34.3 - - + -
233Q ARG* 5.6 0.4 - - - +
4T PHE* 3.7 6.3 - - - -
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Residues in contact with PRO 220 (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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432N LEU* 4.6 9.2 - - + -
433N ASP* 3.3 32.3 - - + +
436N ARG* 3.4 20.4 - - + +
20P ILE 3.7 3.4 - - - +
21P ASP* 4.8 1.3 - - - -
22P LEU 3.6 7.0 - - - +
218P LYS 4.9 0.4 - - - +
219P ILE* 1.3 88.5 - - + +
221P PHE* 1.3 68.6 + - - +
222P HIS 3.1 20.0 + - - +
224P TYR* 3.5 19.6 - - + +
4T PHE* 3.9 18.5 - - + -
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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
------------------------------------------------------------
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