Contacts of the helix formed by residues 3148 - 3152 (chain D) in PDB entry 1W21
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 GLY3148 (chain D).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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1113B ARG 6.1 0.4 - - - -
1116B GLU* 3.5 11.7 - - - -
1117B ASP* 3.5 15.2 + - - -
3144D THR* 4.5 2.7 - - - -
3145D THR* 3.2 18.9 + - - -
3146D LEU 3.9 0.2 - - - +
3147D ARG* 1.3 81.5 - - - +
3149D ARG* 1.3 65.9 + - - -
3150D HIS* 3.1 3.6 - - - -
3151D ALA* 3.1 19.4 + - - +
3152D ASN 4.5 0.3 + - - -
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Residues in contact with ARG3149 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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1116B GLU* 2.9 28.9 + - - +
1147B ARG* 4.0 5.5 - - - +
1473B ILE 4.9 1.4 + - - -
1474B TYR* 2.7 76.6 + - + +
1476B GLU 5.1 7.3 - - - -
3147D ARG 3.8 1.1 + - - +
3148D GLY* 1.3 72.5 - - - -
3150D HIS* 1.3 56.5 + - - +
3151D ALA 3.1 0.9 - - - -
3152D ASN* 3.2 26.6 + - - +
4480D NAG 5.4 2.1 - - - +
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Residues in contact with HIS3150 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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1113B ARG* 3.2 55.1 + - - +
1116B GLU* 3.7 22.7 - - + +
1469B GLY 4.2 0.6 + - - -
1470B ALA* 3.4 13.6 - - - +
1471B GLU* 2.9 36.2 + - - +
1474B TYR* 3.5 24.5 - + - -
1475B PHE* 4.3 3.8 - - - -
3144D THR* 3.4 26.5 - - - +
3148D GLY* 3.1 1.8 - - - -
3149D ARG* 1.3 72.9 - - - +
3151D ALA* 1.3 61.0 + - - +
3152D ASN 3.0 7.9 + - - +
3154D THR* 3.8 1.6 - - - +
4479D GOL 3.1 20.3 + - - +
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Residues in contact with ALA3151 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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3122D VAL* 4.0 5.8 - - + -
3144D THR* 3.4 7.0 + - - -
3145D THR 3.5 9.2 - - - +
3146D LEU 3.2 28.0 - - - +
3148D GLY 3.1 11.0 + - - +
3150D HIS* 1.3 78.6 - - - +
3152D ASN* 1.3 61.0 + - - +
3153D GLY 3.2 0.2 + - - -
3154D THR* 2.8 33.2 + - - -
3446D TRP* 3.3 25.1 - - + +
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Residues in contact with ASN3152 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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1474B TYR* 2.8 21.6 + - - -
3148D GLY 4.5 0.2 + - - -
3149D ARG 3.2 14.3 + - - +
3150D HIS* 3.0 11.7 - - - +
3151D ALA* 1.3 77.0 - - - +
3153D GLY* 1.3 62.9 + - - +
3445D LEU* 3.6 38.9 - - + +
4479D GOL 3.5 9.2 - - - +
4480D NAG 2.3 49.4 + - - +
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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