Contacts of the strand formed by residues 19 - 23 (chain A) in PDB entry 1ESQ
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 19 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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17A SER 3.5 3.0 + - - -
18A PRO* 1.3 68.6 - - - +
20A VAL* 1.3 60.2 + - - +
21A HIS 3.8 1.2 + - - -
42A SER* 3.0 33.0 - - - +
43A PRO 4.5 1.3 - - - +
44A VAL* 3.8 32.1 - - + -
55A MET* 5.2 3.4 - - - -
58A ILE* 3.7 36.3 - - + +
59A ALA* 3.8 9.0 - - + +
60A GLY* 3.0 28.5 + - - +
61A ALA 3.4 5.5 + - - -
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Residues in contact with VAL 20 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
18A PRO* 3.6 14.6 - - + +
19A LEU* 1.3 73.9 - - - +
21A HIS* 1.3 60.7 + - - +
22A SER* 3.6 10.5 + - - +
36A LEU* 4.0 17.3 - - + +
41A ALA* 4.5 4.7 - - + -
42A SER 2.6 10.4 + - - +
43A PRO* 3.5 2.9 - - - +
44A VAL* 3.0 26.6 + - - +
45A MET* 5.4 0.2 - - - +
61A ALA* 3.6 12.8 - - + +
63A VAL* 4.0 27.1 - - + -
202A SER* 4.0 11.0 - - - +
205A GLY 4.5 1.1 - - - -
206A ALA* 3.6 34.3 - - + +
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Residues in contact with HIS 21 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
19A LEU 3.8 1.4 + - - -
20A VAL* 1.3 70.7 - - - +
22A SER* 1.3 73.2 + - - +
23A ILE* 3.6 9.8 - - + +
44A VAL* 3.3 17.5 - - + +
46A ALA* 3.1 29.1 + - - +
52A VAL* 3.5 28.9 - - - -
55A MET* 3.6 19.8 - - + +
56A ALA* 3.4 20.0 + - + -
59A ALA* 3.9 12.3 - - + -
61A ALA 2.8 15.1 + - - +
62A LEU* 3.4 17.1 - - + +
63A VAL* 2.9 26.7 + - - -
80A ALA* 4.6 0.2 - - + -
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Residues in contact with SER 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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20A VAL* 3.6 7.2 + - - +
21A HIS* 1.3 75.1 - - - +
23A ILE* 1.3 62.2 + - - +
24A THR* 3.7 12.8 - - - -
32A THR* 4.5 1.8 - - - +
36A LEU* 5.1 1.1 - - - +
44A VAL 2.9 7.7 + - - -
45A MET* 3.4 48.3 - - - +
46A ALA 3.7 3.1 + - - -
47A TYR* 3.6 3.3 - - - -
63A VAL* 3.5 15.4 - - - +
202A SER* 3.2 25.8 + - - -
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Residues in contact with ILE 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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21A HIS* 3.6 14.4 - - + +
22A SER* 1.3 70.1 - - - +
24A THR* 1.3 58.9 + - - +
46A ALA 3.3 20.2 - - - +
47A TYR* 3.9 23.6 - - + -
52A VAL* 4.2 8.1 - - + -
62A LEU* 4.2 2.7 - - + -
63A VAL 3.1 7.2 + - - +
64A LEU* 3.6 16.6 - - + -
65A ASN 3.0 26.0 + - - +
73A SER* 4.7 8.5 - - - +
76A ALA* 4.3 2.0 - - + +
77A MET* 3.7 34.6 - - + +
80A ALA* 3.6 30.7 - - + -
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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