Contacts of the helix formed by residues 20 - 31 (chain B) in PDB entry 6SQ2
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 GLY 20 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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18B GLY 3.3 2.8 - - - -
19B VAL* 1.3 79.3 - - - +
21B LYS* 1.3 61.3 + - - +
23B CYS* 3.3 1.4 + - - +
24B VAL* 2.8 36.4 + - - +
87B VAL* 4.9 1.8 - - - -
121B ASN* 3.6 9.9 - - - -
900B GTP 3.0 33.6 + - - -
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Residues in contact with LYS 21 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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13B LEU* 3.6 24.0 - - + +
14B ILE* 3.4 33.7 - - - +
15B GLY* 3.0 11.6 + - - +
16B ASP 3.0 17.8 + - - -
19B VAL* 3.8 11.0 - - + +
20B GLY* 1.3 76.7 - - - +
22B THR* 1.3 61.3 + - - +
24B VAL* 3.3 5.5 + - - +
25B LEU* 3.1 18.0 + - - +
63B ASP* 3.6 12.1 - - - +
64B THR* 3.1 30.1 - - - -
66B GLY 4.1 0.9 - - - +
87B VAL* 4.0 17.7 - - + -
900B GTP 2.8 46.3 + - - +
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Residues in contact with THR 22 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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21B LYS* 1.3 75.7 - - - +
23B CYS* 1.3 60.8 + - - +
25B LEU* 3.3 4.4 + - + +
26B PHE* 2.8 30.6 + - + +
38B ILE 5.2 5.8 - - - +
40B THR* 2.8 4.7 + - - +
63B ASP* 2.6 24.4 + - - +
900B GTP 3.0 14.8 + - - +
901B MG 2.0 30.9 - - - -
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Residues in contact with CYS 23 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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20B GLY 3.3 0.6 + - - +
22B THR* 1.3 76.3 - - - +
24B VAL* 1.3 60.9 + - - +
26B PHE* 3.7 10.1 - - - +
27B ARG* 2.9 30.7 + - - +
32B ALA 4.8 1.2 - - - +
33B PHE* 4.1 8.1 - - + -
34B ASN 4.0 13.9 - - - -
36B THR 5.0 2.9 - - - -
152B ALA* 3.5 10.3 - - + +
900B GTP 2.8 69.9 + - + +
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Residues in contact with VAL 24 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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13B LEU* 5.3 3.8 - - + -
20B GLY 2.8 22.3 + - - +
21B LYS* 3.3 7.4 + - - +
23B CYS* 1.3 77.9 - - - +
25B LEU* 1.3 60.5 + - - +
27B ARG* 3.3 1.6 + - - +
28B PHE* 3.1 17.8 + - - +
87B VAL* 5.2 4.9 - - + -
119B LEU* 4.5 18.8 - - + -
121B ASN* 3.6 30.5 - - + +
150B THR* 4.4 7.2 - - - +
152B ALA* 4.1 8.7 - - + -
158B VAL* 3.5 22.2 - - + +
162B PHE* 3.8 24.9 - - + -
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Residues in contact with LEU 25 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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13B LEU* 3.8 6.7 - - + -
21B LYS 3.1 13.4 + - - +
22B THR* 3.6 7.9 - - + +
24B VAL* 1.3 79.4 - - - +
26B PHE* 1.3 57.0 + - - +
28B PHE* 3.1 7.8 + - + -
29B SER* 2.9 33.2 + - - +
44B ASP* 6.4 0.2 - - + -
45B PHE 4.9 0.2 - - - -
46B LYS* 3.6 34.5 - - + +
61B ILE* 3.7 53.4 - - + +
63B ASP* 3.8 29.2 - - + +
162B PHE* 4.6 6.7 - - + -
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Residues in contact with PHE 26 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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22B THR* 2.8 24.3 + - + +
23B CYS* 3.3 11.2 + - - +
25B LEU* 1.3 71.6 - - - +
27B ARG* 1.3 58.5 + - - +
29B SER* 3.8 4.9 - - - -
30B GLU* 2.9 55.6 + - + +
31B ASP 3.4 3.5 + - - -
32B ALA* 3.4 39.7 - - + +
33B PHE* 4.2 11.7 - - - -
34B ASN* 4.8 8.5 - - + -
46B LYS* 6.1 3.1 - - - -
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Residues in contact with ARG 27 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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23B CYS 2.9 17.2 + - - +
24B VAL 3.6 4.5 - - - +
26B PHE* 1.3 76.5 - - - +
28B PHE* 1.3 59.6 + - - +
31B ASP* 2.9 60.8 + - - +
32B ALA* 3.5 18.0 + - - +
33B PHE* 3.6 12.5 - - - +
152B ALA* 2.9 34.0 + - - +
153B LYS 3.0 20.0 + - - -
155B ASN* 3.3 39.9 + - - +
158B VAL* 3.8 20.9 - - + -
159B GLU* 5.6 0.3 - - - +
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Residues in contact with PHE 28 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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24B VAL 3.1 13.8 + - - +
25B LEU* 3.1 9.2 + - + +
27B ARG* 1.3 80.4 - - - +
29B SER* 1.3 61.6 + - - +
31B ASP* 4.7 0.7 + - - +
48B ARG* 2.8 70.4 + - + +
50B ILE* 4.6 1.6 - - + -
59B LEU* 3.9 19.3 - - + -
61B ILE* 3.7 32.1 - - + -
158B VAL* 3.9 5.2 - - + -
159B GLU* 3.6 20.6 - - - -
162B PHE* 3.5 46.7 - + + -
163B PHE* 4.0 15.7 - + - -
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Residues in contact with SER 29 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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25B LEU* 2.9 22.0 + - - -
26B PHE* 3.8 7.6 + - - -
28B PHE* 1.3 81.1 - - - +
30B GLU* 1.3 77.5 + - - +
31B ASP 3.8 0.2 - - - -
46B LYS* 4.4 28.7 - - - +
47B ILE 5.1 7.9 - - - -
48B ARG* 4.7 11.5 - - - +
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Residues in contact with GLU 30 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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26B PHE* 2.9 45.7 + - + +
29B SER* 1.3 90.5 + - - +
31B ASP* 1.3 72.1 + - - +
32B ALA* 3.4 6.2 + - + +
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Residues in contact with ASP 31 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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26B PHE 3.4 0.4 + - - -
27B ARG* 2.9 50.4 + - - +
28B PHE 4.6 0.6 + - - +
29B SER 3.8 1.0 - - - -
30B GLU* 1.3 79.4 - - - +
32B ALA* 1.3 58.7 + - - +
155B ASN* 3.9 11.2 + - - -
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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
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Atomic class I II III IV V VI VII VIII
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I (Hydrophilic) + + + - + + + +
II (Acceptor) + - + - + + + -
III (Donor) + + - - + + - +
IV (Hydrophobic) - - - + + + + +
V (Aromatic) + + + + + + + +
VI (Neutral) + + + + + + + +
VII (Neutral-donor) + + - + + + - +
VIII (Neutral-acceptor) + - + + + + + -
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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