Contacts of the helix formed by residues 20 - 23 (chain G) in PDB entry 1L0N
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 20 (chain G).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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434A TYR* 4.0 8.5 - - + -
435A ASN* 3.4 19.7 - - - +
438A ARG* 5.0 4.0 - - + -
225D HIS* 3.4 42.3 + - + +
226D LYS* 6.0 0.2 - - - -
228D SER* 3.6 15.5 + - - +
229D VAL* 3.5 20.9 - - + -
15E ARG* 3.1 16.8 + - - -
19G SER* 1.3 86.9 - - - +
21G PHE* 1.3 73.9 + - + +
22G GLU 3.1 1.9 + - - -
23G GLN* 3.6 9.0 - - + +
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Residues in contact with PHE 21 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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419A CYS* 4.0 15.5 - - - -
438A ARG* 3.1 28.3 - - + -
225D HIS* 3.7 24.0 - + - -
226D LYS* 6.2 1.6 - - - -
15E ARG* 3.5 17.0 + - - +
32E ARG* 2.9 27.5 + - + +
33E LYS* 3.6 41.7 - - + +
36E SER* 4.0 15.5 - - - -
37E TYR* 3.4 43.3 - + - -
19G SER* 3.1 2.9 + - - -
20G PRO* 1.3 87.8 - - + +
22G GLU* 1.3 59.2 + - + +
23G GLN 3.6 0.4 - - - -
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Residues in contact with GLU 22 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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236A PHE* 4.1 5.7 - - - +
237A THR* 2.6 55.6 - - - +
238A GLY 3.6 5.1 - - - +
419A CYS* 5.4 4.3 - - - +
14E ARG* 3.4 24.3 - - + +
15E ARG* 3.5 10.1 + - - -
18E VAL* 4.7 15.1 - - + +
25E SER* 4.5 5.2 - - - -
32E ARG* 3.2 35.7 + - - +
18G LEU* 3.7 9.9 - - + +
19G SER* 2.9 14.5 + - - +
21G PHE* 1.3 79.3 - - + +
23G GLN* 1.3 60.7 + - - +
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Residues in contact with GLN 23 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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228D SER* 2.9 47.9 + - - +
232D SER* 3.1 22.5 + - - -
13E TYR* 3.2 22.0 - - + +
15E ARG* 2.7 31.5 + - - +
18G LEU* 3.0 50.9 + - + +
19G SER 3.5 7.0 - - - +
20G PRO* 3.6 5.4 - - + +
22G GLU* 1.3 80.4 - - - +
24G ARG* 1.3 63.5 + - - +
25G ALA 3.9 0.9 + - - -
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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