Contacts of the strand formed by residues 25 - 30 (chain A) in PDB entry 3TIW
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 ARG 25 (chain A).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
22A ARG* 4.9 6.1 - - - +
23A PRO* 3.7 36.9 + - + +
24A ASN* 1.3 78.0 + - - +
26A LEU* 1.3 74.4 + - - +
45A LYS* 5.1 4.5 + - - -
80A GLU* 4.8 0.9 - - - +
99A VAL* 3.7 23.3 - - + +
100A ILE 3.3 10.5 - - - +
101A SER* 4.3 6.3 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 26 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
24A ASN 4.3 0.2 + - - -
25A ARG* 1.3 82.3 - - - +
27A ILE* 1.3 64.1 + - - +
41A LEU* 3.5 36.6 - - + -
45A LYS* 3.9 17.5 - - + +
49A LEU* 4.9 1.8 - - + -
79A ASP 3.5 14.1 - - - +
80A GLU* 3.4 28.0 - - - +
81A LYS 3.9 2.7 - - - +
82A ILE* 4.1 19.1 - - + -
99A VAL* 3.3 7.3 - - - -
100A ILE* 3.1 35.4 + - + +
102A ILE* 3.8 25.6 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with ILE 27 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
26A LEU* 1.3 73.2 - - - +
28A VAL* 1.3 65.5 + - - +
29A ASP 3.3 0.3 + - - -
80A GLU* 2.9 30.7 + - + +
81A LYS* 3.3 27.2 - - + +
82A ILE* 2.8 27.6 + - - -
97A GLY* 3.8 27.6 - - - +
98A ASP 3.4 1.8 - - - +
99A VAL* 3.6 27.8 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with VAL 28 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
27A ILE* 1.3 72.3 - - - +
29A ASP* 1.3 64.8 + - - +
81A LYS* 4.7 2.6 + - - -
82A ILE* 3.8 6.1 - - - -
84A MET* 4.1 9.4 - - + -
89A ARG* 3.5 35.2 - - + -
94A VAL* 4.0 12.8 - - + -
95A ARG 3.6 15.9 - - - +
96A LEU* 3.8 5.4 - - - +
97A GLY* 2.9 25.6 + - - -
98A ASP* 2.8 26.2 + - + +
100A ILE* 3.8 32.5 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with ASP 29 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
27A ILE 3.3 0.2 + - - -
28A VAL* 1.3 76.4 - - - +
30A GLU* 1.3 78.7 + - - +
77A CYS* 5.8 0.7 - - - -
78A SER 5.7 1.0 + - - -
81A LYS* 3.4 42.7 + - + +
82A ILE 2.7 19.7 + - - +
83A ARG* 3.3 32.4 + - + +
84A MET 3.2 25.8 + - - +
96A LEU* 3.3 11.3 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 30 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
29A ASP* 1.3 84.2 + - - +
31A ALA* 1.3 72.7 + - - +
34A GLU* 6.0 0.9 - - - +
83A ARG* 2.8 36.6 + - - +
86A ARG* 5.8 1.2 + - - -
89A ARG* 4.1 17.5 + - - +
96A LEU* 3.2 28.7 - - + +
----------------------------------------------------------
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