Contacts of the helix formed by residues 120 - 126 (chain A) in PDB entry 1BRW
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 THR 120 (chain A).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
89A ASP 5.0 2.9 + - - -
92A THR* 3.9 26.2 - - + -
93A LEU* 4.1 15.4 - - + +
110A SER* 4.0 15.7 - - - +
111A GLY 3.6 3.2 + - - -
119A GLY* 1.3 70.3 - - - -
121A ILE* 1.3 63.3 + - - +
123A LYS* 3.0 18.7 + - - +
124A LEU* 2.8 39.5 + - + +
150A ILE* 4.4 0.9 - - + -
2001A PO4 2.6 30.1 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with ILE 121 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
110A SER* 3.7 19.1 - - - +
111A GLY* 3.5 22.9 - - - +
112A ARG* 3.6 40.6 - - + +
119A GLY 3.2 0.4 - - - -
120A THR* 1.3 78.9 - - - +
122A ASP* 1.3 61.5 + - - +
124A LEU* 3.3 12.3 + - + +
125A GLU* 3.2 27.0 + - - +
132A VAL* 3.9 23.9 - - + +
150A ILE* 5.1 0.2 - - + -
151A ILE* 3.9 11.4 - - - +
152A GLY* 3.9 27.8 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ASP 122 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
112A ARG* 2.9 32.7 + - - +
113A GLY* 2.8 32.9 + - - -
119A GLY* 3.1 8.5 + - - +
121A ILE* 1.3 75.5 - - - +
123A LYS* 1.3 62.3 + - - +
125A GLU* 3.4 11.2 + - - +
249A ASN* 3.5 16.2 - - - +
365A ARG* 2.9 27.8 + - - -
372A ILE* 4.5 7.8 - - + +
374A LEU* 3.3 27.4 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with LYS 123 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
88A GLY 5.3 1.2 - - - +
89A ASP* 3.5 22.9 + - - +
90A THR* 4.8 0.7 - - - +
93A LEU* 3.9 28.9 - - + -
118A GLY* 4.2 10.3 - - - -
119A GLY 3.1 30.4 + - - +
120A THR* 3.0 14.7 + - - +
122A ASP* 1.3 76.9 - - - +
124A LEU* 1.3 58.1 + - - +
126A SER* 2.5 27.9 + - - -
248A GLY 3.8 7.4 + - - +
249A ASN* 3.7 23.6 - - - +
252A GLU* 3.1 44.3 + - + +
253A VAL* 3.3 8.2 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 124 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
93A LEU* 3.7 22.4 - - + -
120A THR* 2.8 25.8 + - + +
121A ILE* 3.7 13.0 - - + +
122A ASP 3.3 0.2 - - - -
123A LYS* 1.3 75.7 - - - +
125A GLU* 1.3 56.9 + - - +
127A VAL* 3.1 32.0 + - + +
130A PHE* 3.6 41.9 - - + +
132A VAL* 4.6 1.6 - - + -
150A ILE* 3.6 35.0 - - + +
253A VAL* 5.2 0.9 - - + -
309A PHE* 5.8 1.6 - - + -
312A PHE* 3.8 24.7 - - + -
313A LEU* 5.1 5.8 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 125 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
112A ARG* 2.8 43.6 + - - -
121A ILE 3.2 14.4 + - - +
122A ASP* 3.7 9.8 - - - +
123A LYS 3.3 0.6 - - - -
124A LEU* 1.3 71.7 - - - +
126A SER* 1.3 60.0 + - - +
127A VAL 3.1 14.3 + - - +
128A PRO* 5.4 0.3 - - - +
129A GLY 5.6 0.2 + - - -
130A PHE* 4.8 13.5 - - - +
132A VAL* 3.6 21.9 - - + +
374A LEU* 3.6 20.3 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with SER 126 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
122A ASP 3.7 2.8 + - - -
123A LYS 2.5 23.0 + - - -
124A LEU 3.1 0.2 - - - -
125A GLU* 1.3 76.4 - - - +
127A VAL* 1.3 59.8 + - - +
128A PRO* 3.4 4.3 - - - +
249A ASN* 4.2 2.9 - - - -
250A ALA* 3.6 31.9 - - - -
253A VAL* 3.2 19.2 - - - +
329A LEU* 3.5 3.4 - - - +
330A PRO* 3.3 25.9 - - - +
374A LEU* 4.0 21.3 - - - -
----------------------------------------------------------
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