Contacts of the strand formed by residues 99 - 103 (chain D) in PDB entry 1P27
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 ILE 99 (chain D).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
89D ILE* 5.4 0.2 - - + -
90D HIS* 3.7 32.9 + - + +
93D PHE* 3.4 32.8 - - + +
94D ALA* 3.8 5.6 - - + +
97D GLY 3.4 9.2 + - - +
98D GLU* 1.3 89.8 - - - +
100D LYS* 1.3 61.1 - - - +
101D ASN 3.4 11.9 - - - +
102D ILE* 3.3 42.4 - - + -
119D VAL* 4.2 6.1 - - + -
120D GLU 3.5 5.6 - - - +
121D TYR* 4.0 11.4 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with LYS 100 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
71D GLU 5.8 1.3 - - - +
98D GLU* 3.1 58.9 + - - +
99D ILE* 1.3 72.2 - - - +
101D ASN* 1.3 74.0 + - - +
120D GLU* 3.0 32.0 + - + +
122D GLU* 3.0 58.0 + - + +
126D GLU* 4.2 4.6 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with ASN 101 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
139C LEU* 3.7 26.3 - - + +
142C LYS* 3.6 18.2 - - - +
99D ILE* 3.4 8.7 - - - +
100D LYS* 1.3 87.8 + - - +
102D ILE* 1.3 63.4 + - - +
103D HIS* 4.2 7.5 - - - +
118D LEU 4.3 1.1 - - - -
119D VAL* 3.6 1.7 - - - -
120D GLU* 2.8 53.2 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with ILE 102 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
86D GLU* 3.3 41.5 + - + +
89D ILE* 4.4 11.0 - - + -
90D HIS* 4.0 34.5 - - + -
99D ILE* 3.3 38.4 - - + -
101D ASN* 1.3 71.8 + - - +
103D HIS* 1.3 72.9 + - - +
104D LEU* 3.9 5.1 + - + +
117D THR* 3.8 20.6 - - + -
118D LEU 3.4 4.0 - - - -
119D VAL* 4.8 7.0 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with HIS 103 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
134C PHE 5.5 0.4 + - - -
135C SER* 3.0 41.4 + - - +
138C GLY* 5.9 1.0 - - - -
139C LEU* 3.5 42.0 + - + +
101D ASN* 4.2 8.0 - - - -
102D ILE* 1.3 79.4 + - - +
104D LEU* 1.3 59.7 + - - +
105D ASN* 3.8 9.2 + - - +
116D TYR* 4.3 1.0 - - - +
117D THR* 3.1 23.0 - - - +
118D LEU* 3.0 23.8 + - + +
----------------------------------------------------------
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