Contacts of the helix formed by residues 222 - 227 (chain B) in PDB entry 1SIW
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 MET 222 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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78B MET* 3.5 19.1 - - + +
84B LEU* 3.3 42.2 - - + +
87B LYS* 3.6 28.7 - - + +
88B ILE* 3.8 7.2 - - + +
91B ASN* 3.9 14.8 - - + +
195B THR 3.4 19.3 - - - +
197B PRO* 4.1 11.9 - - + -
220B TRP* 3.2 23.3 - - + +
221B ARG* 1.3 90.0 - - - +
223B CYS* 1.3 66.2 + - - +
224B ILE 3.2 2.2 - - - -
225B THR* 3.0 9.2 + - - -
226B GLY 3.0 16.8 + - - -
805B F3S 3.4 3.8 - - - -
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Residues in contact with CYS 223 (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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192B CYS* 4.2 5.0 - - - +
195B THR* 3.6 13.3 + - - -
201B ILE* 3.6 23.8 - - + -
222B MET* 1.3 80.0 - - - +
224B ILE* 1.3 86.6 + - - +
226B GLY* 3.1 0.3 + - - -
227B CYS* 2.9 26.3 + - - +
232B ILE* 3.8 20.3 - - + +
241B SER* 3.7 6.1 - - - -
805B F3S 2.3 41.2 - - - -
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Residues in contact with ILE 224 (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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94B LEU* 4.2 13.2 - - + -
95B PRO* 3.6 31.0 - - + -
100B TYR* 4.1 7.2 - - - +
221B ARG* 3.7 23.8 - - + +
222B MET 3.2 0.2 - - - -
223B CYS* 1.3 88.7 - - - +
225B THR* 1.3 61.8 + - - +
227B CYS* 3.7 5.9 + - - +
230B LYS* 3.2 22.2 + - + +
232B ILE* 3.8 32.3 - - + +
234B PHE* 4.4 14.1 - - + +
241B SER* 3.1 28.3 - - - +
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Residues in contact with THR 225 (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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62B TYR 3.4 16.8 - - - +
63B LYS* 3.9 4.0 - - + +
64B GLY* 3.3 10.4 - - - -
78B MET* 3.2 30.3 - - + -
91B ASN* 2.8 29.9 + - - +
93B HIS* 3.8 13.7 + - + +
94B LEU* 3.7 12.8 + - - -
95B PRO* 4.6 0.6 - - - +
222B MET 3.0 10.3 + - - -
224B ILE* 1.3 76.5 - - - +
226B GLY* 1.3 66.6 + - - +
230B LYS* 3.0 22.2 + - - +
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Residues in contact with GLY 226 (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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64B GLY* 4.7 0.7 - - - -
65B GLY 2.9 27.8 + - - +
78B MET* 3.8 12.3 - - - -
191B ALA* 3.3 12.8 - - - +
195B THR* 3.6 23.6 - - - -
222B MET 3.0 10.7 + - - -
223B CYS 3.1 4.2 + - - -
225B THR* 1.3 78.8 - - - +
227B CYS* 1.3 56.1 + - - +
228B PRO* 3.2 2.8 - - - +
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Residues in contact with CYS 227 (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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192B CYS* 4.6 1.7 - - + +
223B CYS 2.9 15.1 + - - +
224B ILE 3.7 4.2 - - - +
225B THR 3.3 0.6 - - - -
226B GLY* 1.3 73.7 - - - +
228B PRO* 1.3 60.1 - - - +
229B TYR* 3.3 11.2 - - - -
230B LYS* 2.8 54.0 + - - +
231B LYS 3.4 14.8 - - - +
232B ILE* 4.3 7.4 - - + +
804B SF4 2.3 47.6 - - - -
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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