Contacts of the helix formed by residues 108 - 115 (chain A) in PDB entry 4LT2
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 TRP 108 (chain A).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
28A TRP* 3.8 28.3 - + - -
31A ALA* 5.0 3.4 - - + -
35A GLU* 3.5 26.7 - - + +
56A LEU* 2.8 43.3 + - + +
58A ILE* 4.6 0.6 - - + +
95A ALA* 3.8 27.8 - - + -
98A ILE* 3.7 35.4 - - + -
99A VAL* 4.2 6.5 - - + -
104A GLY 4.4 0.9 - - - -
105A MET* 2.8 46.3 + - + +
106A ASN 3.7 4.7 - - - +
107A ALA* 1.4 73.9 - - + +
109A VAL* 1.3 65.5 + - - +
110A ALA 3.2 0.4 - - - -
111A TRP* 3.0 22.2 + - + -
112A ARG* 3.0 10.6 + - - +
202A DMS 4.1 17.0 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with VAL 109 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
35A GLU* 3.9 3.0 + - - +
106A ASN 4.6 2.2 - - - +
107A ALA 3.7 6.9 + - - +
108A TRP* 1.3 72.3 - - - +
110A ALA* 1.3 57.0 + - - +
112A ARG* 3.4 25.8 + - - +
113A ASN* 3.0 48.3 + - - +
202A DMS 4.6 7.4 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 110 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
31A ALA* 4.7 1.1 - - - +
34A PHE* 3.7 31.2 - - + +
35A GLU* 3.4 28.1 + - + +
108A TRP 3.2 0.6 - - - -
109A VAL* 1.3 76.3 - - - +
111A TRP* 1.3 59.3 + - - +
113A ASN* 4.5 1.3 - - - +
114A ARG* 2.8 43.6 + - - +
115A CYS* 3.6 2.8 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with TRP 111 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
23A TYR* 3.7 25.8 - + - -
27A ASN* 2.8 38.8 + - - +
31A ALA* 4.1 9.7 - - + +
105A MET* 3.3 44.4 - - + +
106A ASN* 3.5 34.1 - - - -
108A TRP* 3.0 23.8 + - + +
110A ALA* 1.3 77.3 - - - +
112A ARG* 1.3 70.3 + - - +
115A CYS* 2.8 36.6 + - + +
116A LYS* 2.7 67.8 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with ARG 112 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
106A ASN* 3.3 43.7 + - - +
108A TRP 3.0 11.7 + - - +
109A VAL* 3.7 34.6 - - - +
111A TRP* 1.3 91.0 - - + +
113A ASN* 1.3 88.4 + - - +
116A LYS* 3.5 29.1 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with ASN 113 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
109A VAL* 3.0 39.1 + - - +
110A ALA* 4.8 0.4 - - - -
112A ARG* 1.3 101.7 + - - +
114A ARG* 1.3 69.3 + - + +
116A LYS 5.7 0.9 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with ARG 114 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
30A CYS* 4.1 3.8 - - - -
34A PHE* 3.4 70.9 + - + +
110A ALA* 2.8 20.0 + - - +
113A ASN* 1.3 91.2 - - + +
115A CYS* 1.3 61.3 + - - +
116A LYS 4.9 0.4 - - - -
118A THR* 3.8 16.6 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with CYS 115 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
30A CYS* 2.0 64.6 - - + -
31A ALA* 3.6 4.3 - - - -
34A PHE* 4.0 5.2 - - - -
110A ALA 4.2 1.1 - - - -
111A TRP* 2.8 43.1 + - + +
114A ARG* 1.3 76.6 - - - +
116A LYS* 1.3 65.8 + - - +
117A GLY 3.4 0.2 + - - -
118A THR* 2.6 24.2 + - - +
120A VAL* 3.4 12.8 - - + +
----------------------------------------------------------
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