Contacts of the helix formed by residues 25 - 32 (chain B) in PDB entry 4QGC
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 25 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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24B ASP* 1.3 93.0 + - + +
26B PHE* 1.3 64.2 + - - +
27B LEU 3.9 0.5 + - - -
28B GLU* 3.3 12.5 + - - +
29B HIS* 3.0 23.0 + - - +
390B TYR* 3.4 8.0 - - - -
397C GLU* 3.6 23.7 + - + +
400C ARG* 4.1 32.3 - - + +
401C LEU* 3.2 31.3 - - + +
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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
----------------------------------------------------------
25B THR* 1.3 72.1 - - - +
27B LEU* 1.3 65.1 + - + +
29B HIS* 3.1 6.1 + - - +
30B MET* 3.1 59.5 + - + +
388B ALA 4.6 3.8 - - - -
390B TYR* 3.8 40.6 - + + -
393B GLN* 4.1 11.7 - - - +
354C ASP 6.2 0.2 - - - -
393C GLN* 4.3 13.2 - - - +
397C GLU* 2.7 24.8 + - - +
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Residues in contact with LEU 27 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
25B THR* 3.3 3.1 - - - +
26B PHE* 1.3 78.6 - - + +
28B GLU* 1.3 64.1 + - - +
30B MET* 3.2 7.2 + - + +
31B CYS* 3.0 30.1 + - - -
315C GLY* 3.3 34.3 - - - +
318C ASN* 4.3 10.8 - - + +
319C ARG* 4.2 14.6 - - + +
397C GLU* 2.8 22.1 + - + +
398C LEU* 3.6 37.7 - - + +
401C LEU* 4.3 15.3 - - + -
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Residues in contact with GLU 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 ASP* 4.9 4.0 - - + +
25B THR* 3.3 25.7 + - - +
27B LEU* 1.3 79.9 - - - +
29B HIS* 1.3 62.5 + - - +
31B CYS* 3.2 6.1 + - - +
32B ARG* 3.0 70.4 + - - +
319C ARG* 2.6 32.5 + - - -
401C LEU* 3.3 32.5 - - + +
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Residues in contact with HIS 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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24B ASP 5.3 4.9 - - - +
25B THR 3.0 14.2 + - - +
26B PHE* 3.2 13.9 - - - +
28B GLU* 1.3 78.0 - - - +
30B MET* 1.3 78.9 + - + +
32B ARG* 3.5 14.3 + - + +
33B LEU* 3.7 13.9 + - - +
387B ALA 3.0 27.9 + - - -
388B ALA 3.7 3.0 + - - -
389B ILE 3.1 30.4 + - - -
390B TYR* 4.0 19.9 - + + +
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Residues in contact with MET 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* 3.1 46.6 + - + +
27B LEU* 3.2 9.4 + - + +
29B HIS* 1.3 96.3 - - - +
31B CYS* 1.3 63.8 + - - +
33B LEU* 3.3 32.0 + - + +
388B ALA* 3.3 38.8 - - + +
311C LYS* 3.9 30.3 - - - +
312C MET* 3.4 13.4 - - - -
315C GLY* 4.7 7.4 - - - -
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Residues in contact with CYS 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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27B LEU* 3.0 25.0 + - - +
28B GLU* 3.2 10.1 + - - +
30B MET* 1.3 77.8 - - - +
32B ARG* 1.3 57.0 + - - +
33B LEU 3.3 1.8 + - - -
312C MET* 3.9 2.4 - - - +
315C GLY 3.4 32.1 - - - -
316C ARG* 2.9 47.2 + - + -
319C ARG* 3.3 41.8 + - - +
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Residues in contact with ARG 32 (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 ASP* 4.9 15.8 - - - +
28B GLU* 3.0 54.3 + - - +
29B HIS* 3.5 8.7 + - + +
30B MET 3.2 0.4 - - - -
31B CYS* 1.3 76.6 - - - +
33B LEU* 1.3 65.1 + - - +
34B ASP* 3.4 8.3 + - - +
316C ARG* 4.8 2.7 - - - +
319C ARG* 5.6 0.7 - - - +
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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