Contacts of the helix formed by residues 15 - 23 (chain A) in PDB entry 3STJ
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 LEU 15 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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14A SER* 1.4 75.0 + - - +
16A ALA* 1.4 58.7 + - - +
17A PRO* 3.5 2.0 - - - -
18A MET* 3.3 16.1 + - + +
19A LEU* 2.9 34.4 + - + +
142A VAL* 3.6 26.9 - - + -
156A SER* 3.7 17.7 - - - +
194A LEU* 3.6 27.6 - - + -
138B GLY* 3.0 22.6 + - - +
140B PHE* 3.9 18.6 - - + -
158B ILE* 4.1 19.1 - - + -
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Residues in contact with ALA 16 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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14A SER* 3.0 16.0 + - - +
15A LEU* 1.4 73.7 - - - +
17A PRO* 1.4 68.4 - - + +
19A LEU* 4.4 0.4 - - - -
20A GLU* 2.9 26.9 + - - +
136B ARG* 3.6 38.6 - - + +
137B VAL 3.2 23.7 - - - +
138B GLY* 3.7 2.4 - - - -
139B ASP* 3.7 2.5 - - - +
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Residues in contact with PRO 17 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
14A SER* 3.5 24.0 - - - +
15A LEU 3.6 1.3 - - - -
16A ALA* 1.4 91.3 - - + +
18A MET* 1.4 59.9 + - - +
20A GLU* 3.6 23.4 - - - +
21A LYS* 3.7 21.3 - - - +
136B ARG* 4.2 14.1 - - - +
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Residues in contact with MET 18 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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15A LEU* 3.3 18.5 + - + +
17A PRO* 1.4 77.4 - - - +
19A LEU* 1.3 89.9 + - + +
20A GLU 3.4 0.3 + - - -
21A LYS* 3.4 14.4 + - - +
22A VAL* 3.4 21.5 + - - +
142A VAL* 3.8 26.7 - - + -
192A LEU* 4.5 2.5 - - + -
193A ASN 3.4 21.8 - - - +
194A LEU* 3.4 22.2 - - - +
195A ASN* 4.7 7.2 - - - +
196A GLY* 3.4 26.2 - - - -
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Residues in contact with LEU 19 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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15A LEU* 2.9 29.9 + - + +
16A ALA 3.2 2.9 + - - +
18A MET* 1.3 95.9 - - + +
20A GLU* 1.4 58.0 + - - +
22A VAL* 4.7 0.7 - - + -
23A LEU* 2.8 67.1 + - + +
142A VAL* 3.9 23.6 - - + -
144A VAL* 4.4 0.4 - - + -
154A ALA* 4.4 4.9 - - + -
192A LEU* 4.3 10.8 - - + -
137B VAL* 3.8 16.6 - - + +
138B GLY* 3.6 26.2 - - - +
158B ILE* 5.0 0.7 - - + -
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Residues in contact with GLU 20 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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16A ALA 2.9 13.1 + - - +
17A PRO* 3.6 13.4 - - - +
19A LEU* 1.4 76.3 - - - +
21A LYS* 1.3 60.9 + - + +
23A LEU* 4.8 4.8 - - - +
24A PRO* 3.8 13.3 - - - +
136B ARG* 2.8 43.5 + - - -
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Residues in contact with LYS 21 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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17A PRO* 3.7 24.2 - - - +
18A MET* 3.4 9.5 + - - +
19A LEU 3.2 0.4 - - - -
20A GLU* 1.3 79.4 - - + +
22A VAL* 1.3 63.2 + - + +
23A LEU 3.8 0.2 - - - -
24A PRO* 3.6 11.2 - - - +
125A THR* 3.9 15.8 - - - +
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Residues in contact with VAL 22 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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18A MET* 3.5 17.0 - - - +
19A LEU* 3.3 4.9 + - + +
21A LYS* 1.3 80.7 - - + +
23A LEU* 1.4 66.8 + - - +
24A PRO* 3.3 3.8 - - - -
25A ALA* 3.3 23.2 + - - +
26A VAL* 4.1 5.5 + - + +
125A THR* 5.4 0.9 - - - -
127A ILE* 4.0 11.6 - - + +
128A ALA* 5.9 1.1 - - + +
192A LEU* 3.4 33.4 - - + -
195A ASN 4.6 3.4 - - - +
196A GLY* 3.1 33.7 - - - +
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Residues in contact with LEU 23 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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19A LEU* 2.8 62.8 + - + +
20A GLU* 4.8 3.6 - - - +
22A VAL* 1.4 72.7 - - + +
24A PRO* 1.4 64.8 - - + +
25A ALA 3.1 1.6 + - - -
26A VAL* 3.1 11.1 + - - +
95A ASN* 3.3 8.4 + - - +
144A VAL* 3.8 22.7 - - + -
152A GLN* 3.0 45.0 - - + +
154A ALA* 4.7 7.6 - - + -
137B VAL* 4.2 22.9 - - + -
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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