Contacts of the helix formed by residues 440 - 444 (chain A) in PDB entry 6FD3
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 440 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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401A ARG 4.7 0.4 + - - -
402A ASP* 2.7 27.2 + - - -
404A LYS* 2.8 23.9 + - - +
423A PHE* 4.8 2.3 - - - -
439A GLY* 1.3 74.1 + - - -
441A PRO* 1.4 75.3 - - + +
442A TYR* 4.4 7.0 - - + -
443A TRP* 2.9 49.8 + - + +
444A MET* 3.5 9.1 + - - +
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Residues in contact with PRO 441 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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439A GLY 4.0 6.1 - - - +
440A THR* 1.4 89.4 - - + +
442A TYR* 1.3 75.4 + - + +
444A MET* 3.0 35.1 + - + +
482A PRO* 3.9 33.4 - - + +
485A ALA* 4.9 0.9 - - + -
486A LEU* 3.8 18.3 - - + +
489A ILE* 3.2 17.1 - - - +
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Residues in contact with TYR 442 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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440A THR* 3.0 7.9 + - + -
441A PRO* 1.3 85.5 - - + +
443A TRP* 1.3 77.1 + + + +
444A MET 3.5 0.7 + - - +
461A TRP* 5.4 0.2 + - - -
465A ILE* 3.8 17.2 - - - +
475A PRO* 3.8 17.0 - - + +
476A PRO* 3.8 10.1 - - - +
477A TYR* 3.1 35.9 - - - -
478A LEU* 3.9 27.6 + - + -
480A GLU 2.7 20.1 + - - -
482A PRO* 3.7 23.2 - - + +
485A ALA* 3.5 23.1 - - + -
489A ILE* 4.3 12.5 - - - +
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Residues in contact with TRP 443 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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402A ASP* 5.9 0.9 - - - +
403A ILE 3.5 26.5 - - - +
404A LYS* 3.4 21.8 - - + +
405A SER* 4.8 0.7 - - - -
406A ASP* 5.7 3.6 - - - -
440A THR* 2.9 44.3 + - + +
442A TYR* 1.3 94.5 - + + +
444A MET* 1.3 62.2 + - - +
461A TRP* 3.5 10.8 - - - -
462A SER* 2.7 34.3 + - - +
465A ILE* 3.4 29.0 - - + +
466A MET 4.1 1.3 - - - +
469A GLU* 2.8 42.8 + - - +
475A PRO* 3.5 23.6 - - + -
478A LEU* 4.6 7.2 - - + -
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Residues in contact with MET 444 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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437A MET* 4.3 21.1 - - + +
438A VAL* 3.8 18.8 - - - +
439A GLY* 3.6 28.5 - - - +
440A THR 3.5 13.0 - - - +
441A PRO* 3.0 30.8 + - + +
442A TYR 3.5 0.4 - - - -
443A TRP* 1.3 78.3 - - - +
445A ALA* 1.3 65.2 + - - +
448A VAL* 4.1 22.0 - - + -
449A VAL* 3.7 12.3 - - + -
461A TRP* 3.3 10.9 + - - -
462A SER* 4.7 1.8 - - - -
486A LEU* 3.8 15.3 - - + -
489A ILE* 3.6 17.5 - - - +
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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