Contacts of the helix formed by residues 369 - 373 (chain B) in PDB entry 3ISL
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 369 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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19B PRO* 3.3 39.0 - - + +
22B VAL* 3.3 19.6 - - + +
149B THR* 4.0 9.6 - - + -
177B ALA* 3.9 17.9 - - + +
200B LYS* 3.7 27.4 - - + -
201B CYS* 3.8 9.2 - - - -
297B HIS* 3.9 1.3 - - - -
323B MET* 5.5 0.7 - - - -
325B VAL* 2.8 28.3 - - + +
326B VAL* 3.8 27.4 - - + -
367B GLY 3.8 2.2 - - - -
368B THR* 1.4 75.9 - - - +
370B GLY* 1.3 69.3 + - - +
371B TYR 3.3 0.5 + - - -
372B SER* 3.1 17.2 + - - -
373B CYS* 3.7 2.5 - - - +
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Residues in contact with GLY 370 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
201B CYS* 3.3 25.7 + - - +
203B SER* 3.6 6.3 - - - -
293B ARG* 3.8 9.6 - - - -
296B ARG* 2.8 27.2 + - - -
297B HIS* 2.9 17.7 + - - -
369B MET* 1.3 71.1 - - - +
371B TYR* 1.3 57.1 + - - -
373B CYS* 3.0 10.7 + - - +
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Residues in contact with TYR 371 (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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23B GLU* 3.6 28.0 - - + +
24B VAL 4.0 11.0 - - - -
25B ASP* 3.5 38.6 - - + +
26B PRO* 3.4 28.7 - - + +
203B SER* 2.9 12.9 + - - +
293B ARG* 4.9 0.6 - - - +
296B ARG* 4.9 2.2 - - - +
370B GLY* 1.3 72.1 - - - -
372B SER* 1.3 59.9 + - - +
373B CYS 3.1 1.2 + - - -
374B ARG* 2.8 66.2 + - - +
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Residues in contact with SER 372 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
16B ILE 2.6 29.6 + - - -
17B MET* 3.3 11.4 - - - +
22B VAL* 4.1 10.9 - - - +
23B GLU* 3.1 29.6 + - - +
367B GLY 5.4 0.4 - - - -
369B MET 3.1 14.9 + - - -
371B TYR* 1.3 78.9 - - - +
373B CYS* 1.3 58.6 + - - +
374B ARG* 3.1 8.7 + - - +
377B ASN* 3.3 28.1 - - - +
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Residues in contact with CYS 373 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
17B MET* 5.4 0.2 - - - -
296B ARG* 2.9 22.3 + - - +
297B HIS* 3.8 24.5 - - - +
300B HIS* 3.4 36.5 + - - -
368B THR* 3.4 40.4 - - - +
369B MET 3.4 3.7 + - - +
370B GLY 3.0 13.9 + - - +
371B TYR 4.3 0.2 - - - -
372B SER* 1.3 78.4 - - - +
374B ARG* 1.3 58.8 + - - +
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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