Contacts of the helix formed by residues 16 - 21 (chain A) in PDB entry 4UY1
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 THR 16 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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15A ARG* 1.3 74.0 - - - +
17A PRO* 1.3 77.1 - - - +
18A ILE* 3.1 27.3 + - + +
19A ALA* 3.1 27.7 + - + +
20A TYR* 4.1 3.6 - - - -
1124A 1PE 3.8 55.2 + - - +
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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
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6A ALA* 3.8 25.6 - - + +
9A VAL* 4.6 2.2 - - + -
10A GLY* 4.8 6.1 - - - +
15A ARG 3.5 5.1 - - - +
16A THR* 1.3 88.5 - - - +
18A ILE* 1.3 61.5 + - + +
20A TYR* 3.2 27.0 + - + +
21A MET* 3.8 13.0 - - - +
1130A TJM 3.7 33.3 - - + -
1132A PEG 4.3 9.4 - - - +
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Residues in contact with ILE 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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16A THR* 3.1 19.9 + - + +
17A PRO* 1.3 78.4 - - + +
19A ALA* 1.3 59.9 + - - +
20A TYR 3.1 1.7 + - - -
21A MET* 3.3 32.0 + - + +
22A LYS 4.9 0.2 + - - -
108A LEU* 4.7 6.2 - - - +
109A PHE* 6.1 1.9 - - + -
1124A 1PE 4.0 37.9 - - - +
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Residues in contact with ALA 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 ARG* 4.2 11.2 - - + -
16A THR* 3.1 20.0 + - + +
17A PRO 3.1 0.6 - - - -
18A ILE* 1.3 76.8 - - - +
20A TYR* 1.3 61.4 + - + +
21A MET 3.5 0.7 - - - -
23A TYR* 3.8 9.7 - - - +
103A TYR* 2.6 49.9 + - + +
108A LEU* 3.9 4.5 - - - +
1124A 1PE 3.9 23.6 - - - +
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Residues in contact with TYR 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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9A VAL* 3.7 24.0 - - + -
13A GLY* 6.0 0.3 - - - -
14A PRO* 5.1 1.6 - - - +
15A ARG* 2.8 49.2 + - + +
16A THR 4.1 7.6 - - - -
17A PRO 3.2 11.1 + - - +
18A ILE 3.1 0.8 - - - -
19A ALA* 1.3 80.9 - - + +
21A MET* 1.3 63.7 + - - +
22A LYS 3.6 1.8 - - - -
23A TYR* 4.5 4.3 - + - -
27A CYS* 3.5 24.6 - - + +
39A ILE* 3.9 29.8 - - + -
43A CYS* 5.1 0.2 - - - -
98A LEU* 3.7 33.2 + - + +
103A TYR* 4.4 7.2 - + - -
1130A TJM 3.5 44.2 + - + -
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Residues in contact with MET 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 3.8 13.7 - - - +
18A ILE* 3.3 34.2 + - + +
19A ALA 3.5 0.8 - - - -
20A TYR* 1.3 78.9 - - - +
22A LYS* 1.3 87.6 + - - +
27A CYS 3.8 0.4 - - - -
28A GLY* 3.3 20.3 - - - -
1127A DMS 4.0 0.2 + - - -
1130A TJM 4.7 25.1 - - + +
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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