Contacts of the helix formed by residues 421 - 426 (chain M) in PDB entry 3FKS
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 ALA 421 (chain M).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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165M VAL* 4.6 6.5 - - + +
345M TYR* 6.4 4.3 - - + -
417M PRO* 5.3 0.7 - - + -
418M PHE* 3.0 38.8 + - + +
420M VAL* 1.3 76.4 - - - +
422M GLU* 1.3 63.7 + - - +
423M VAL 3.4 1.6 - - - -
424M PHE* 3.5 23.1 - - + -
425M THR* 3.1 34.7 + - + +
427M ILE 4.9 0.2 - - - -
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Residues in contact with GLU 422 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
378L SER* 5.1 0.5 + - - -
386L LYS* 6.3 1.1 - - - +
418M PHE 3.5 2.0 + - - -
419M ALA* 3.2 18.4 + - - +
420M VAL 3.0 3.3 - - - +
421M ALA* 1.3 76.4 - - - +
423M VAL* 1.3 65.3 + - + +
426M GLY* 3.1 31.7 + - - -
427M ILE 4.1 5.8 + - - -
428M PRO* 3.6 26.0 - - - +
429M GLY 3.6 19.8 + - - -
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Residues in contact with VAL 423 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
375L ARG 4.5 8.7 - - - +
376L VAL* 3.8 22.0 - - - +
377L GLY* 3.3 19.2 - - - -
378L SER* 3.3 27.7 + - - +
379L ALA* 4.2 16.2 - - + +
386L LYS* 5.4 4.7 - - - +
420M VAL 4.3 11.7 - - - +
422M GLU* 1.3 84.1 - - + +
424M PHE* 1.3 69.2 + - + +
426M GLY 4.7 0.7 - - - -
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Residues in contact with PHE 424 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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373L VAL* 5.7 5.4 - - + -
374L SER 4.2 11.4 - - - -
375L ARG* 3.6 53.2 - - + -
377L GLY* 5.2 0.2 - - - -
393L LYS* 4.7 27.3 + - - +
394L LEU* 5.7 0.3 - - - +
165M VAL* 3.5 35.7 - - + -
345M TYR* 5.5 14.4 - + + -
420M VAL* 3.8 12.1 - - + -
421M ALA* 3.1 33.6 + - + +
422M GLU 3.1 1.2 - - - -
423M VAL* 1.3 86.9 - - + +
425M THR* 1.3 68.5 + - + +
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Residues in contact with THR 425 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
390L GLY 3.5 4.4 - - - +
391L SER* 3.2 29.5 + - - -
393L LYS* 6.1 1.3 - - - +
394L LEU* 3.5 37.2 - - + +
345M TYR* 5.2 9.2 - - + -
417M PRO* 5.0 4.7 - - + +
421M ALA* 3.1 21.0 + - + +
424M PHE* 1.3 86.8 - - + +
426M GLY* 1.3 62.9 + - - +
427M ILE* 3.2 24.1 + - - +
459M MET* 4.3 15.9 - - + -
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Residues in contact with GLY 426 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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390L GLY* 4.6 10.5 - - - -
391L SER* 4.3 4.2 + - - -
422M GLU* 3.1 16.2 + - - -
423M VAL 4.7 0.6 - - - -
424M PHE 3.8 0.2 - - - -
425M THR* 1.3 78.6 + - - +
427M ILE* 1.3 64.1 + - - +
428M PRO* 4.0 6.0 - - - +
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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
------------------------------------------------------------
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