Contacts of the helix formed by residues 306 - 312 (chain B) in PDB entry 3IXK
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 PRO 306 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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304B LYS 4.5 1.8 - - - +
305B PHE* 1.4 84.5 - - + +
307B ASP* 1.3 58.8 + - - +
308B GLY 3.2 0.9 - - - -
309B PHE* 2.8 33.6 + - + +
310B TRP* 4.0 3.1 + - - -
314B GLN* 3.1 34.3 - - + +
315B LEU 4.2 13.5 - - - +
316B VAL* 3.8 17.9 - - + -
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Residues in contact with ASP 307 (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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297B LYS* 4.8 8.2 + - - -
305B PHE 3.5 5.4 + - - +
306B PRO* 1.3 71.7 - - - +
308B GLY* 1.3 57.7 + - - +
310B TRP* 3.2 36.4 + - - +
311B LEU* 4.0 9.3 + - - +
314B GLN* 3.8 1.6 - - - +
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Residues in contact with GLY 308 (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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307B ASP* 1.3 74.1 - - - +
309B PHE* 1.3 63.5 + - - +
310B TRP 3.1 2.2 - - - -
311B LEU* 3.0 14.5 + - - -
313B GLU* 2.9 40.5 + - - +
314B GLN* 3.1 24.0 - - - +
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Residues in contact with PHE 309 (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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305B PHE* 3.9 24.7 - + + -
306B PRO* 2.8 30.4 + - + +
308B GLY* 1.3 76.4 - - - +
310B TRP* 1.3 98.5 + + - +
311B LEU 3.3 1.0 + - - -
312B GLY* 3.3 9.4 + - - -
314B GLN* 3.4 28.7 - - - +
316B VAL* 3.5 34.5 - - + -
328B PHE* 5.6 2.9 - + - -
354B LEU* 3.9 16.4 - - + -
368B TYR 4.1 4.5 - - - -
370B PHE* 3.5 42.9 + + + +
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Residues in contact with TRP 310 (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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289B PHE* 3.7 17.9 - - + -
293B VAL* 4.7 15.9 - - + -
296B ILE* 3.8 33.0 - - + -
297B LYS* 3.5 49.8 - - + +
300B SER* 4.1 9.6 - - - -
305B PHE* 3.9 32.1 + + + +
306B PRO 4.1 8.7 - - - -
307B ASP* 3.2 23.3 + - - +
308B GLY 3.1 1.4 - - - -
309B PHE* 1.3 102.3 - + - +
311B LEU* 1.3 61.9 + - + +
312B GLY 3.3 1.3 - - - -
328B PHE* 5.1 5.2 - + - -
370B PHE* 3.6 42.3 - + - -
372B ILE 4.5 0.5 - - - +
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Residues in contact with LEU 311 (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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289B PHE* 4.9 15.9 - - + -
307B ASP 4.4 10.1 - - - +
308B GLY* 3.0 10.6 + - - +
310B TRP* 1.3 82.9 - - + +
312B GLY* 1.3 61.9 + - - +
313B GLU* 3.8 29.4 + - - +
370B PHE* 5.7 0.2 - - - -
372B ILE 5.8 2.0 - - - -
373B SER* 5.4 7.2 - - - -
374B GLN* 5.3 7.9 - - - +
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Residues in contact with GLY 312 (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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308B GLY 3.1 1.4 + - - -
309B PHE 3.3 8.1 + - - -
310B TRP 3.3 3.2 + - - -
311B LEU* 1.3 82.0 - - - +
313B GLU* 1.3 60.5 + - - +
314B GLN 3.8 3.6 - - - -
369B LYS* 3.7 30.4 + - - +
370B PHE* 4.2 14.7 + - - -
373B SER* 6.5 0.2 - - - -
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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