Contacts of the helix formed by residues 421 - 425 (chain G) in PDB entry 4D1Q
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 TRP 421 (chain G).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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266G SER* 3.3 44.0 + - - +
269G LEU* 3.7 23.1 - - + -
270G LEU* 4.1 24.0 - - + -
273G VAL* 4.5 6.3 - - + -
370G ILE* 4.4 6.3 - - + -
374G LEU* 4.2 13.7 - - + -
385G VAL* 4.2 8.2 - - + +
388G SER* 4.0 15.9 - - - -
389G ILE* 3.9 30.7 - - + -
392G VAL* 4.0 23.6 - - + -
416G ASN 3.6 0.6 + - - -
417G VAL* 3.1 30.6 + - + +
420G ILE* 1.3 76.7 - - - +
422G GLU* 1.3 56.9 + - - +
424G ASN* 2.5 33.6 + - - +
425G LEU* 3.1 29.1 + - + +
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Residues in contact with GLU 422 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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389G ILE* 3.7 16.4 - - + +
393G LYS* 2.7 38.7 + - - -
417G VAL* 2.8 14.3 + - - +
418G ARG* 3.4 27.4 + - - +
421G TRP* 1.3 72.2 - - - +
423G GLU* 1.3 62.9 + - - +
424G ASN 3.0 1.2 + - - -
425G LEU* 3.1 30.0 + - + +
430G TYR* 4.1 21.3 + - - +
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Residues in contact with GLU 423 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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418G ARG 2.8 16.8 + - - +
419G ILE* 3.2 30.3 - - + +
421G TRP 3.0 0.4 + - - -
422G GLU* 1.3 73.1 - - - +
424G ASN* 1.3 68.9 + - - +
425G LEU 3.6 3.7 + - - +
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Residues in contact with ASN 424 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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249G ARG* 3.5 27.4 + - - +
263G ILE* 5.9 0.2 - - - +
264G ASN* 3.3 43.3 + - - +
269G LEU* 3.7 9.7 - - + +
419G ILE 4.1 7.9 + - - -
420G ILE 3.0 25.9 + - - +
421G TRP 2.5 15.6 + - - +
423G GLU* 1.3 84.0 - - - +
425G LEU* 1.3 64.1 + - - +
426G SER* 5.3 0.2 - - - -
429G HIS* 5.1 1.4 - - - -
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Residues in contact with LEU 425 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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266G SER* 4.3 1.1 - - - +
269G LEU* 4.9 1.8 - - + -
385G VAL* 3.9 6.1 - - + -
386G VAL* 5.4 1.6 - - + -
389G ILE* 3.3 31.9 - - + -
421G TRP* 3.4 36.6 - - + +
422G GLU* 3.1 20.8 + - + +
423G GLU 4.3 3.6 - - - +
424G ASN* 1.3 85.8 - - - +
426G SER* 1.3 66.0 + - - +
429G HIS* 3.9 35.9 - - + +
430G TYR* 4.2 27.1 - - + +
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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