Contacts of the helix formed by residues 111 - 117 (chain C) in PDB entry 1GXD
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 SER 111 (chain C).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
109C THR 3.7 1.5 + - - -
110C LEU* 1.3 75.7 - - - +
112C THR* 1.3 57.0 + - - +
113C THR* 2.8 37.9 + - - -
114C GLN* 2.8 24.0 + - - +
115C LYS* 3.3 15.1 + - - +
163C LYS* 3.0 18.9 + - - -
164C PHE* 4.8 15.8 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with THR 112 (chain C).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
111C SER* 1.3 72.4 - - - +
113C THR* 1.3 62.9 + - + +
115C LYS* 4.5 12.4 + - - +
116C LYS* 3.6 27.8 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with THR 113 (chain C).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
111C SER* 2.8 19.5 + - - -
112C THR* 1.3 85.0 - - + +
114C GLN* 1.3 62.9 + - - -
115C LYS 3.3 0.2 - - - -
116C LYS* 3.3 14.1 + - - +
117C SER* 3.3 13.9 + - - -
121C ARG* 5.5 2.8 - - - -
163C LYS 3.0 14.2 + - - -
164C PHE* 3.8 32.8 - - + +
179C ARG* 5.7 6.7 - - + -
180C GLY 6.1 2.5 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with GLN 114 (chain C).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
8C PRO* 4.5 13.9 - - - +
103C PHE* 5.4 3.0 - - - -
109C THR 4.2 2.4 - - - +
110C LEU* 3.1 33.9 - - + +
111C SER* 2.8 39.9 + - - +
113C THR* 1.3 77.9 + - - +
115C LYS* 1.3 58.7 + - - +
117C SER* 2.3 28.0 + - - -
118C LEU* 4.2 5.0 + - - +
122C TYR* 4.4 10.8 - - + +
158C ASN* 4.1 18.6 + - - +
162C ALA 3.8 15.9 + - - +
163C LYS* 3.1 36.0 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with LYS 115 (chain C).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
107C TRP* 3.9 55.1 + - + +
108C ASP* 5.6 2.2 + - - +
110C LEU* 3.6 33.4 + - + -
111C SER 3.3 13.6 + - - +
112C THR* 4.7 9.4 + - - +
114C GLN* 1.3 76.6 - - - +
116C LYS* 1.3 61.1 + - + +
117C SER 2.8 6.9 + - - -
118C LEU* 2.9 36.3 + - + +
119C ASN* 4.5 0.3 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with LYS 116 (chain C).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
112C THR* 3.6 19.5 - - + +
113C THR* 3.3 10.5 + - - +
115C LYS* 1.3 79.0 - - + +
117C SER* 1.3 56.4 + - - +
118C LEU 3.1 2.5 - - - -
119C ASN* 3.2 26.3 + - - +
120C HIS 4.7 2.1 + - - -
121C ARG* 4.4 11.3 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with SER 117 (chain C).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
12C PHE* 4.9 0.2 - - - -
113C THR 3.3 9.4 + - - -
114C GLN* 2.3 30.1 + - - -
116C LYS* 1.3 77.2 - - - +
118C LEU* 1.3 62.2 + - - +
119C ASN 3.4 1.1 + - - -
120C HIS 4.3 0.2 + - - -
121C ARG* 3.4 29.1 + - - +
122C TYR* 3.0 61.5 + - - +
123C GLN 4.5 1.2 + - - -
166C ALA* 5.7 0.7 - - - -
----------------------------------------------------------
Back to top of page
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
------------------------------------------------------------
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) + - + + + + + -
------------------------------------------------------------
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