Contacts of the helix formed by residues 47 - 61 (chain A) in PDB entry 2CRA
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 47 (chain A).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
41A SER* 4.9 0.7 - - - -
46A LEU* 1.3 75.7 - - - +
48A GLU* 1.3 67.5 + - - +
49A ARG* 2.9 9.2 + - - -
50A GLN* 3.0 34.7 + - - +
51A ILE* 3.0 16.3 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 48 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
34A LYS* 4.7 4.2 - - - +
37A ARG* 2.8 64.4 + - + +
38A ARG* 3.7 26.6 - - + +
41A SER* 4.6 12.5 - - - +
46A LEU 4.0 1.0 + - - -
47A SER* 1.3 72.0 - - - +
49A ARG* 1.3 59.2 + - - +
51A ILE* 4.0 3.5 + - - -
52A THR* 2.8 13.9 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with ARG 49 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
37A ARG* 5.1 5.2 - - - +
47A SER* 3.0 6.8 - - - -
48A GLU* 1.3 79.7 - - - +
50A GLN* 1.3 68.2 + - + +
52A THR* 3.0 15.2 + - - +
53A ILE* 2.9 45.3 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with GLN 50 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
13A PRO* 5.9 2.0 - - - +
14A TYR* 3.3 42.8 + - + +
46A LEU* 4.0 16.6 - - + +
47A SER* 3.0 28.6 + - - +
49A ARG* 1.3 81.0 - - + +
51A ILE* 1.3 63.3 + - - +
53A ILE* 3.2 13.5 + - + +
54A TRP* 3.1 18.5 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ILE 51 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
14A TYR* 5.8 0.4 - - - -
22A LEU* 3.2 28.3 - - + -
32A ILE* 4.1 16.8 - - + -
37A ARG* 3.6 13.2 - - + +
40A ILE* 3.6 17.0 - - + -
41A SER* 3.5 36.6 - - - +
46A LEU* 3.8 18.1 - - + +
47A SER 3.0 16.5 + - - +
48A GLU* 4.2 5.2 - - - +
50A GLN* 1.3 74.4 - - - +
52A THR* 1.3 63.8 + - - +
54A TRP* 3.2 4.9 + - - +
55A PHE* 3.0 33.4 + - + -
----------------------------------------------------------
Back to top of page
Residues in contact with THR 52 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
32A ILE* 5.5 2.6 - - - +
37A ARG* 3.1 20.4 + - - +
48A GLU 2.8 18.6 + - - -
49A ARG* 3.0 19.7 + - - +
51A ILE* 1.3 76.7 - - - +
53A ILE* 1.3 68.6 + - + +
55A PHE* 2.9 9.4 + - + +
56A GLN* 2.8 36.7 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with ILE 53 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
14A TYR* 5.1 3.8 - - - +
49A ARG* 2.9 43.9 + - + +
50A GLN* 3.6 14.6 - - + +
52A THR* 1.3 76.8 - - + +
54A TRP* 1.3 57.6 + - - +
56A GLN* 3.4 6.9 + - - +
57A ASN* 3.1 43.7 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with TRP 54 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
12A ILE* 6.0 2.4 - - + +
14A TYR* 3.7 33.8 + + + -
19A LEU* 3.3 24.7 - - + +
22A LEU* 3.6 33.0 - - + -
23A GLU* 3.7 37.5 - - + -
26A TYR* 4.2 10.3 - + + -
50A GLN 3.1 11.8 + - - +
51A ILE* 3.4 10.1 - - - +
52A THR 3.1 0.6 - - - -
53A ILE* 1.3 75.4 - - - +
55A PHE* 1.3 84.4 + + - +
57A ASN* 3.4 7.9 + - + +
58A ARG* 3.1 51.9 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 55 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
22A LEU* 3.4 45.5 - - + -
25A GLU* 3.7 12.6 - - + -
26A TYR* 3.5 35.1 - + - -
29A ASN 3.6 3.6 - - - -
30A LYS 3.4 24.3 - - - +
31A PHE* 5.7 2.8 - - + -
32A ILE* 3.4 33.0 - - + +
40A ILE* 4.5 1.6 - - + -
51A ILE* 3.0 31.0 + - + +
52A THR* 2.9 12.2 + - + +
54A TRP* 1.3 88.5 - + - +
56A GLN* 1.3 61.6 + - + +
58A ARG* 3.5 6.7 - - - +
59A ARG* 3.4 19.6 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with GLN 56 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
31A PHE* 3.8 31.4 - - + -
52A THR* 2.8 31.7 + - + +
53A ILE* 3.6 7.6 - - - +
55A PHE* 1.3 74.8 - - + +
57A ASN* 1.3 61.9 + - - +
58A ARG 3.0 1.3 - - - -
59A ARG* 3.0 6.5 + - - +
60A VAL* 2.8 52.9 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with ASN 57 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
53A ILE* 3.1 34.7 + - - +
54A TRP* 3.4 7.9 + - + +
56A GLN* 1.3 78.8 - - - +
58A ARG* 1.3 57.0 + - - +
60A VAL* 4.5 8.4 - - - +
61A LYS* 3.0 30.7 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ARG 58 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
23A GLU* 5.1 12.7 + - - +
26A TYR* 3.4 44.3 + - + -
54A TRP* 3.1 41.9 + - + +
55A PHE* 3.5 13.7 - - - +
56A GLN 3.0 0.4 - - - -
57A ASN* 1.3 79.3 - - - +
59A ARG* 1.3 59.5 - - - +
61A LYS* 3.5 27.9 - - - +
62A GLU* 4.2 6.4 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ARG 59 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
26A TYR* 3.5 17.0 - - + +
30A LYS* 3.6 41.3 - - + +
31A PHE* 3.4 35.9 - - + -
55A PHE 3.4 6.8 + - - +
56A GLN* 3.0 9.0 + - - +
58A ARG* 1.3 76.9 - - - +
60A VAL* 1.3 68.0 + - + +
61A LYS 3.0 1.6 - - - -
62A GLU* 2.8 33.6 + - - +
63A LYS* 3.3 41.6 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with VAL 60 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
56A GLN* 2.8 46.2 + - + +
57A ASN* 4.4 7.9 - - - +
59A ARG* 1.3 72.2 - - + +
61A LYS* 1.3 56.0 + - - +
63A LYS* 2.8 33.3 + - + +
64A LYS* 3.2 31.3 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with LYS 61 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
57A ASN 3.0 21.7 + - - +
58A ARG* 3.5 27.4 - - - +
60A VAL* 1.3 77.4 - - - +
62A GLU* 1.3 58.0 + - + +
63A LYS 3.4 0.7 + - - -
64A LYS* 4.5 5.6 - - - +
66A GLY 4.1 17.0 - - - +
67A PRO* 3.5 28.1 + - - +
----------------------------------------------------------
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