Contacts of the helix formed by residues 403 - 408 (chain D) in PDB entry 1IR1
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 GLY 403 (chain D).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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172D CYS* 4.1 0.7 - - - -
173D THR* 3.3 32.6 - - - +
175D LYS* 4.5 2.7 - - - -
401D GLN 4.1 0.2 - - - -
402D PHE* 1.3 70.5 - - - +
404D GLY* 1.3 65.9 + - - +
405D GLY 3.0 0.8 - - - +
406D THR 2.9 11.8 + - - -
407D LEU* 3.0 18.6 + - - +
501D CAP 2.8 22.5 + - - -
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Residues in contact with GLY 404 (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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175D LYS* 4.5 7.1 - - - +
403D GLY* 1.3 73.2 - - - +
405D GLY* 1.3 56.2 + - - +
407D LEU* 5.1 1.8 - - - -
408D GLY* 2.9 33.2 + - - -
462D TRP* 3.7 6.6 - - - -
501D CAP 2.8 20.6 + - - -
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Residues in contact with GLY 405 (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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382D ILE 4.1 20.0 + - - -
383D HIS* 5.1 4.1 - - - -
384D VAL* 5.7 0.5 - - - +
402D PHE* 4.1 7.2 - - - -
403D GLY 3.0 4.0 - - - +
404D GLY* 1.3 76.7 - - - +
406D THR* 1.3 59.2 + - - +
409D HIS* 5.8 0.2 - - - -
416D GLY* 4.5 3.5 - - - +
420D ASN* 3.4 17.7 + - - +
462D TRP* 3.6 30.3 - - - -
501D CAP 5.1 0.2 + - - -
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Residues in contact with THR 406 (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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172D CYS* 3.9 4.0 - - - -
192D CYS* 4.0 20.6 - - - -
197D LEU* 4.1 15.6 - - + +
402D PHE* 2.7 24.2 + - - +
403D GLY 2.9 2.5 + - - -
405D GLY* 1.3 78.1 - - - +
407D LEU* 1.3 60.0 + - + +
408D GLY 3.0 8.0 + - - -
409D HIS* 3.2 19.9 + - - +
412D GLY 3.9 5.4 - - - +
413D ASN* 3.7 22.1 - - - +
416D GLY* 3.8 4.9 - - - -
417D ALA 3.9 11.0 - - - +
420D ASN* 3.0 19.2 + - - +
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Residues in contact with LEU 407 (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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172D CYS* 3.4 31.0 - - - -
173D THR 3.9 9.0 - - - +
174D ILE* 4.4 9.9 - - + -
175D LYS* 3.4 40.6 - - + +
188D ALA* 4.8 4.0 - - + -
192D CYS* 3.9 10.5 - - - -
403D GLY 3.0 12.6 + - - +
404D GLY* 4.8 2.0 - - - +
406D THR* 1.3 77.4 - - - +
408D GLY* 1.3 57.3 + - - +
409D HIS 3.4 4.0 - - - +
412D GLY* 5.8 1.2 - - - -
413D ASN* 3.3 33.3 - - - +
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Residues in contact with GLY 408 (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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404D GLY* 2.9 20.2 + - - -
407D LEU* 1.3 77.2 - - - +
409D HIS* 1.3 65.8 + - - +
410D PRO* 3.5 4.3 - - - +
461D VAL* 5.0 4.7 - - - +
462D TRP* 3.6 18.3 - - - -
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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