Contacts of the helix formed by residues 2537 - 2541 (chain B) in PDB entry 1DCX
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 ASN2537 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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139A TRP* 3.8 13.0 - - - -
2228B VAL* 3.0 37.4 + - - +
2337B ILE* 3.8 6.8 - - - +
2341B ILE* 3.9 14.1 - - + -
2373B TYR* 4.0 2.4 - - - -
2532B LYS 4.4 0.4 + - - -
2533B GLY 4.4 5.6 + - - +
2534B LEU 3.5 17.1 + - - +
2535B MET 3.1 1.7 - - - +
2536B GLY* 1.3 78.4 - - - +
2538B PRO* 1.3 68.4 - - - +
2539B ILE* 3.1 37.6 + - - +
2540B CYS* 2.8 28.9 + - - +
2541B SER 3.8 2.1 + - - -
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Residues in contact with PRO2538 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
127A PRO* 4.1 17.9 - - + -
139A TRP* 3.5 29.6 - - + -
142A PHE* 3.6 41.7 - - + -
2373B TYR* 5.2 2.2 - - + +
2536B GLY 3.6 4.4 - - - +
2537B ASN* 1.3 91.6 - - - +
2539B ILE* 1.3 56.9 + - + +
2541B SER* 2.5 34.4 + - - +
2544B TYR* 3.3 17.3 - - + +
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Residues in contact with ILE2539 (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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139A TRP* 4.6 7.9 - - + -
2334B LEU* 4.2 31.2 - - + +
2337B ILE* 4.4 5.6 - - + -
2338B GLY* 3.7 33.9 - - - +
2341B ILE* 4.4 8.5 - - + -
2361B PHE* 5.0 1.3 - - + -
2537B ASN* 3.1 22.3 + - - +
2538B PRO* 1.3 75.4 - - + +
2540B CYS* 1.3 67.5 + - - +
2541B SER 3.3 0.4 - - - -
2544B TYR* 3.5 19.4 - - + -
2545B TRP* 3.1 46.2 + - + -
2550B PHE* 4.4 15.4 - - + -
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Residues in contact with CYS2540 (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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2341B ILE* 4.5 1.3 - - - -
2361B PHE* 3.8 32.5 - - - -
2363B PRO* 3.2 29.8 - - + +
2367B PHE* 3.4 9.0 - - - -
2373B TYR* 3.7 8.0 + - + -
2534B LEU 3.6 23.1 - - - -
2535B MET* 3.2 27.8 - - + +
2537B ASN* 2.8 8.7 + - - +
2539B ILE* 1.3 86.2 - - - +
2541B SER* 1.3 63.4 + - - +
2545B TRP* 4.4 0.7 - - - -
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Residues in contact with SER2541 (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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126A SER 5.3 0.2 - - - -
127A PRO* 3.9 19.4 - - - +
2367B PHE* 4.1 0.7 - - - -
2373B TYR* 3.9 25.5 - - - -
2537B ASN 3.8 1.2 + - - -
2538B PRO 2.5 22.5 + - - -
2540B CYS* 1.3 81.6 - - - +
2542B PRO* 1.3 71.8 - - - +
2543B GLN* 4.2 3.5 + - - +
2544B TYR* 3.0 18.4 + - - -
2545B TRP* 2.8 25.6 + - - +
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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