Contacts of the strand formed by residues 70 - 75 (chain M) in PDB entry 1W72
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 MET 70 (chain M).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
22M THR* 3.5 37.2 - - + +
23M CYS 3.6 12.3 - - - +
24M GLY* 4.2 13.0 - - - +
28M ILE* 3.2 5.8 - - - +
65M SER* 4.9 0.5 + - - -
66M ASN* 3.8 1.2 - - - -
67M SER* 3.0 31.1 + - - +
69M ASN* 1.3 82.5 - - - +
71M ALA* 1.3 69.6 + - - +
72M THR* 4.1 11.2 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 71 (chain M).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
22M THR* 3.5 0.7 - - - -
23M CYS* 2.7 40.0 + - + +
28M ILE* 3.7 23.3 - - + +
33M VAL* 4.0 21.5 - - + -
35M TRP* 4.2 3.4 - - + -
65M SER 3.2 13.9 - - - +
66M ASN* 3.9 7.9 - - + +
70M MET* 1.3 73.9 - - - +
72M THR* 1.3 64.9 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with THR 72 (chain M).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
20M ARG* 3.7 37.5 + - + +
21M ILE 3.3 11.7 - - - +
22M THR* 4.2 5.8 - - + +
35M TRP* 3.9 4.6 + - - -
64M GLY* 3.5 4.9 - - - -
65M SER* 3.0 41.8 + - - +
70M MET* 4.1 12.3 + - - +
71M ALA* 1.3 77.6 + - - +
73M LEU* 1.3 69.5 + - - +
74M THR* 3.8 14.2 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 73 (chain M).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
19M ALA 3.7 1.0 - - - +
20M ARG* 3.3 4.3 - - - -
21M ILE* 2.7 43.7 + - + +
35M TRP* 3.5 45.0 - - + +
47M VAL* 4.5 3.1 - - + -
48M VAL* 3.8 24.0 - - + -
62M PHE* 4.4 10.3 - - + -
63M SER 3.4 19.3 - - - +
72M THR* 1.3 72.0 - - - +
74M THR* 1.3 63.9 + - - +
75M ILE* 4.1 13.2 - - + +
86M TYR* 3.5 38.6 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with THR 74 (chain M).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
18M THR* 5.0 9.0 - - - -
19M ALA 3.3 8.5 - - - +
20M ARG* 4.0 12.0 + - + +
61M ARG 3.2 2.5 - - - +
62M PHE* 3.6 1.6 - - - -
63M SER* 2.8 51.2 + - - -
64M GLY* 5.8 0.2 - - - -
65M SER* 5.6 0.7 + - - -
72M THR* 3.8 17.2 + - - +
73M LEU* 1.3 75.0 - - - +
75M ILE* 1.3 68.9 + - - +
76M SER* 3.9 5.4 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ILE 75 (chain M).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
17M GLN 3.8 1.7 - - - +
18M THR* 3.2 2.6 - - - -
19M ALA* 2.7 44.5 + - + +
21M ILE* 4.5 7.0 - - + -
61M ARG* 3.3 30.1 - - - +
62M PHE* 4.0 23.1 - - + -
73M LEU* 4.1 13.9 - - + +
74M THR* 1.3 75.7 - - - +
76M SER* 1.3 61.1 + - - +
78M VAL* 4.3 5.5 + - + +
82M ASP* 3.7 11.4 - - + +
86M TYR* 3.9 27.6 - - + +
104M LEU* 3.8 27.4 - - + -
----------------------------------------------------------
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