Contacts of the helix formed by residues 16 - 21 (chain H) in PDB entry 3SRF
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 GLN 16 (chain H).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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307G LEU* 3.5 30.3 - - + +
13H GLN 5.3 0.2 - - - -
15H GLN* 1.3 76.8 - - - +
17H LEU* 1.3 58.9 + - - +
18H HIS* 3.3 3.6 - - - -
19H ALA* 3.4 11.5 + - + +
20H ALA* 3.1 23.2 + - - +
28H HIS* 5.3 0.7 - - - -
31H ARG 4.3 1.6 - - - +
32H LEU* 3.5 6.4 - - + -
33H ASP* 2.7 50.6 + - - +
36H SER* 3.0 23.4 + - - +
383H GLU* 4.3 3.2 + - - +
386H ALA* 3.4 34.5 - - + +
387H ALA* 4.1 8.1 - - - +
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Residues in contact with LEU 17 (chain H).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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13H GLN* 3.5 32.9 - - + +
14H THR* 3.5 24.9 + - + +
15H GLN* 3.1 13.3 + - - +
16H GLN* 1.3 75.7 - - - +
18H HIS* 1.3 64.6 + - - +
20H ALA* 3.3 18.6 + - + +
21H MET* 3.5 22.0 - - + +
423H LEU* 4.1 29.6 - - + -
446H ARG* 3.6 43.3 - - - +
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Residues in contact with HIS 18 (chain H).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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13H GLN* 4.2 20.2 - - + +
16H GLN 3.3 0.6 - - - -
17H LEU* 1.3 76.4 - - - +
19H ALA* 1.3 60.4 + - - +
21H MET* 3.3 11.3 + - - +
31H ARG* 3.2 82.9 + - + +
33H ASP* 6.6 0.2 - - + -
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Residues in contact with ALA 19 (chain H).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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16H GLN* 3.4 11.7 + - + +
17H LEU 3.3 0.2 - - - -
18H HIS* 1.3 75.0 - - - +
20H ALA* 1.3 61.5 + - - +
21H MET 3.1 0.9 - - - -
22H ALA* 3.3 14.1 + - - +
28H HIS* 2.6 54.5 + - + +
31H ARG* 3.6 24.2 + - + +
32H LEU* 3.9 14.8 - - + -
389H PHE* 4.6 0.5 - - - -
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Residues in contact with ALA 20 (chain H).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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16H GLN 3.1 13.1 + - - +
17H LEU* 3.4 18.4 - - + +
18H HIS 3.2 0.4 - - - -
19H ALA* 1.3 75.8 - - - +
21H MET* 1.3 61.2 + - + +
22H ALA 3.3 1.1 + - - -
28H HIS* 4.3 7.2 - - - -
388H MET 5.6 2.0 - - - +
389H PHE* 3.9 10.4 - - - -
390H HIS* 5.6 4.5 - - + +
391H ARG* 3.0 24.4 + - - +
446H ARG* 3.7 28.0 - - - +
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Residues in contact with MET 21 (chain H).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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399D ARG* 5.2 6.1 + - - -
402D SER* 3.9 45.8 - - - +
403D HIS* 4.8 4.9 - - + +
17H LEU* 3.5 17.7 - - + +
18H HIS* 3.3 11.5 + - - +
19H ALA 3.1 1.2 - - - -
20H ALA* 1.3 81.1 - - + +
22H ALA* 1.3 59.7 + - - +
23H ASP* 5.0 0.9 - - - +
31H ARG* 3.4 13.7 + - - +
391H ARG* 3.4 13.3 + - - +
423H LEU* 5.9 7.6 - - + -
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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