Contacts of the strand formed by residues 124 - 128 (chain E) in PDB entry 6IAP
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 124 (chain E).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
127D SER* 6.3 0.4 - - - -
123E PRO* 1.3 72.6 - - - +
125E VAL* 1.4 60.1 - - - +
126E PHE* 3.5 33.2 - - - -
145E LEU 2.9 15.9 - - - +
147E LYS* 2.7 30.7 + - - +
148E ASP* 4.7 6.9 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with VAL 125 (chain E).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
123E PRO* 3.9 7.4 + - + +
124E SER* 1.4 70.9 - - - +
126E PHE* 1.3 63.9 + - - +
144E CYS* 4.0 9.2 - - + -
145E LEU 3.5 4.0 - - - +
146E VAL* 4.8 5.8 - - + -
200E CYS* 3.8 21.5 - - - -
202E VAL* 4.0 25.6 - - + -
211E VAL* 3.8 37.6 - - + +
213E LYS* 3.2 46.2 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 126 (chain E).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
121D SER* 4.0 13.2 - - - -
123D GLU* 3.7 16.8 - - + -
124D GLN* 3.4 42.6 - - + +
127D SER* 3.8 20.6 - - - -
129D THR* 5.2 2.0 - - + -
124E SER* 3.5 42.8 - - - -
125E VAL* 1.3 78.1 - - - +
127E PRO* 1.4 69.1 - - + +
128E LEU* 6.4 0.2 - - + -
144E CYS* 3.3 5.3 - - - -
145E LEU* 2.7 59.6 + - + +
147E LYS* 4.2 12.3 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with PRO 127 (chain E).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
121D SER* 3.3 33.2 + - - +
123D GLU* 3.6 9.9 - - - +
126E PHE* 1.4 81.8 - - - +
128E LEU* 1.3 60.1 + - - +
129E ALA* 3.3 8.7 + - + +
143E GLY 3.7 5.2 - - - +
144E CYS* 4.6 1.6 - - - -
213E LYS* 3.5 33.9 - - + +
214E ARG 3.9 7.6 - - - +
215E VAL* 3.8 31.9 - - + -
216E GLU* 5.1 2.2 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 128 (chain E).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
118D PHE* 3.3 44.3 - - + +
119D PRO 5.1 7.6 - - - +
121D SER* 6.2 2.0 - - - +
131D SER 5.4 3.4 - - - +
133D VAL* 3.9 23.8 - - + -
126E PHE 5.3 0.2 - - - +
127E PRO* 1.3 70.6 - - - +
129E ALA* 1.3 67.0 + - - +
142E LEU* 3.4 2.6 - - - +
143E GLY* 2.7 30.5 + - - +
144E CYS 3.6 35.0 - - - +
145E LEU* 4.0 11.0 - - + +
183E SER* 4.1 18.6 - - - +
185E VAL* 4.3 9.4 - - + -
215E VAL* 4.0 1.6 - - - -
----------------------------------------------------------
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