Contacts of the strand formed by residues 75 - 81 (chain A) in PDB entry 3Q8A
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 ASP 75 (chain A).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
74A SER* 1.3 77.1 + - - +
76A GLU* 1.3 69.7 + - - +
77A TYR* 3.9 27.8 - - + +
107A ARG* 3.6 11.4 - - - +
108A LEU 3.0 33.5 + - - +
138A ASP* 4.5 7.0 - - + +
139A SER* 2.4 45.6 + - - -
140A GLN* 5.6 1.4 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 76 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
75A ASP* 1.3 80.1 + - - +
77A TYR* 1.3 60.4 + - - +
105A LYS* 4.6 12.8 - - + +
106A ILE* 3.7 8.7 + - - -
107A ARG* 2.6 62.8 + - - +
137A THR 3.6 1.2 - - - +
138A ASP 3.5 24.8 - - - +
139A SER* 3.4 14.0 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with TYR 77 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
71A VAL* 4.1 18.9 + - + +
74A SER 4.6 4.5 + - - -
75A ASP* 3.9 29.3 - - + +
76A GLU* 1.3 73.3 - - - +
78A THR* 1.3 64.6 + - - +
79A PHE* 4.3 7.0 - - + -
105A LYS* 4.6 0.4 - - - -
106A ILE* 2.9 45.3 + - + +
108A LEU* 3.2 45.8 - - + -
136A TRP* 4.0 42.6 - + + -
137A THR 3.5 13.2 - - - -
138A ASP* 4.1 21.1 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with THR 78 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
77A TYR* 1.3 76.9 + - - +
79A PHE* 1.3 73.1 + - - +
80A ALA* 3.8 4.6 + - + +
104A ASN 3.7 24.4 + - - +
105A LYS* 3.4 21.8 + - - +
106A ILE* 5.2 0.4 - - - -
136A TRP* 3.4 3.2 - - - -
137A THR* 3.1 44.5 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 79 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
69A ILE* 3.6 23.1 - - + -
77A TYR* 5.3 5.2 - - + -
78A THR* 1.3 78.5 - - - +
80A ALA* 1.3 61.7 + - - +
84A ASP* 4.6 1.7 - - - +
89A MET* 4.0 25.8 - - + -
91A VAL* 3.6 30.1 - - + -
96A VAL* 4.6 20.9 - - + +
97A ILE* 3.6 23.9 - - + +
104A ASN 5.1 1.2 + - - -
106A ILE* 5.4 8.5 - - + +
108A LEU* 4.7 14.8 - - + -
116A ILE* 5.0 0.9 - - + -
134A LEU* 4.7 4.5 - - + -
135A TYR 3.2 15.5 - - - -
136A TRP* 3.8 15.9 - + + -
146A ILE* 3.4 26.2 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 80 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
78A THR* 3.8 7.3 + - + +
79A PHE* 1.3 76.7 - - - +
81A THR* 1.3 62.3 + - - +
84A ASP* 4.0 12.6 - - - +
97A ILE* 4.6 0.9 - - - -
135A TYR* 2.7 44.8 + - + +
137A THR* 5.7 0.7 - - - +
143A LYS* 3.0 35.2 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with THR 81 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
80A ALA* 1.3 76.9 - - - +
82A SER* 1.3 60.3 + - - +
83A ALA 3.1 13.7 + - - -
84A ASP* 2.5 33.4 + - - +
87A VAL* 3.8 15.4 - - + +
89A MET* 5.5 0.9 - - - -
97A ILE* 4.5 11.9 - - + +
118A ILE* 5.0 4.0 - - + -
132A PHE* 4.0 20.2 - - + -
133A LYS 3.6 13.0 - - - +
134A LEU* 3.4 31.2 - - + -
135A TYR* 3.9 7.6 - - - -
143A LYS* 5.7 0.2 + - - -
----------------------------------------------------------
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